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2019-12-20VSOCK: add full barrier between test casesStefan Hajnoczi1-2/+16
See code comment for details. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-12-20VSOCK: extract connect/accept functions from vsock_diag_test.cStefan Hajnoczi3-76/+119
Many test cases will need to connect to the server or accept incoming connections. This patch extracts these operations into utility functions that can be reused. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-12-20VSOCK: extract utility functions from vsock_diag_test.cStefan Hajnoczi4-71/+125
Move useful functions into a separate file in preparation for more vsock test programs. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-12-20VSOCK: add SPDX identifiers to vsock testsStefan Hajnoczi2-0/+2
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-12-20VSOCK: fix header include in vsock_diag_testStefan Hajnoczi3-5/+4
The vsock_diag_test program directly included ../../../include/uapi/ headers from the source tree. Tests are supposed to use the usr/include/linux/ headers that have been prepared with make headers_install instead. Suggested-by: David S. Miller <davem@davemloft.net> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-12-18selftests: qdiscs: Add test coverage for ETS QdiscPetr Machata1-0/+940
Add TDC coverage for the new ETS Qdisc. Signed-off-by: Petr Machata <petrm@mellanox.com> Reviewed-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-12-18selftests: forwarding: sch_ets: Add test coverage for ETS QdiscPetr Machata5-0/+666
This tests the newly-added ETS Qdisc. It runs two to three streams of traffic, each with a different priority. ETS Qdisc is supposed to allocate bandwidth according to the DRR algorithm and given weights. After running the traffic for a while, counters are compared for each stream to check that the expected ratio is in fact observed. In order for the DRR process to kick in, a traffic bottleneck must exist in the first place. In slow path, such bottleneck can be implemented by wrapping the ETS Qdisc inside a TBF or other shaper. This might however make the configuration unoffloadable. Instead, on HW datapath, the bottleneck would be set up by lowering port speed and configuring shared buffer suitably. Therefore the test is structured as a core component that implements the testing, with two wrapper scripts that implement the details of slow path resp. fast path configuration. Signed-off-by: Petr Machata <petrm@mellanox.com> Reviewed-by: Ido Schimmel <idosch@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-12-18selftests: forwarding: Move start_/stop_traffic from mlxsw to lib.shPetr Machata2-18/+18
These two functions are used for starting several streams of traffic, and then stopping them later. They will be handy for the test coverage of ETS Qdisc. Move them from mlxsw-specific qos_lib.sh to the generic lib.sh. Signed-off-by: Petr Machata <petrm@mellanox.com> Reviewed-by: Ido Schimmel <idosch@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-12-16wireguard: selftests: import harness makefile for test suiteJason A. Donenfeld18-0/+947
WireGuard has been using this on build.wireguard.com for the last several years with considerable success. It allows for very quick and iterative development cycles, and supports several platforms. To run the test suite on your current platform in QEMU: $ make -C tools/testing/selftests/wireguard/qemu -j$(nproc) To run it with KASAN and such turned on: $ DEBUG_KERNEL=yes make -C tools/testing/selftests/wireguard/qemu -j$(nproc) To run it emulated for another platform in QEMU: $ ARCH=arm make -C tools/testing/selftests/wireguard/qemu -j$(nproc) At the moment, we support aarch64_be, aarch64, arm, armeb, i686, m68k, mips64, mips64el, mips, mipsel, powerpc64le, powerpc, and x86_64. The system supports incremental rebuilding, so it should be very fast to change a single file and then test it out and have immediate feedback. This requires for the right toolchain and qemu to be installed prior. I've had success with those from musl.cc. This is tailored for WireGuard at the moment, though later projects might generalize it for other network testing. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-12-14selftests/net: make so_txtime more robust to timer varianceWillem de Bruijn2-5/+88
The SO_TXTIME test depends on accurate timers. In some virtualized environments the test has been reported to be flaky. This is easily reproduced by disabling kvm acceleration in Qemu. Allow greater variance in a run and retry to further reduce flakiness. Observed errors are one of two kinds: either the packet arrives too early or late at recv(), or it was dropped in the qdisc itself and the recv() call times out. In the latter case, the qdisc queues a notification to the error queue of the send socket. Also explicitly report this cause. Link: https://lore.kernel.org/netdev/CA+FuTSdYOnJCsGuj43xwV1jxvYsaoa_LzHQF9qMyhrkLrivxKw@mail.gmail.com Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org> Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
2019-12-08net: WireGuard secure network tunnelJason A. Donenfeld1-0/+537
WireGuard is a layer 3 secure networking tunnel made specifically for the kernel, that aims to be much simpler and easier to audit than IPsec. Extensive documentation and description of the protocol and considerations, along with formal proofs of the cryptography, are available at: * https://www.wireguard.com/ * https://www.wireguard.com/papers/wireguard.pdf This commit implements WireGuard as a simple network device driver, accessible in the usual RTNL way used by virtual network drivers. It makes use of the udp_tunnel APIs, GRO, GSO, NAPI, and the usual set of networking subsystem APIs. It has a somewhat novel multicore queueing system designed for maximum throughput and minimal latency of encryption operations, but it is implemented modestly using workqueues and NAPI. Configuration is done via generic Netlink, and following a review from the Netlink maintainer a year ago, several high profile userspace tools have already implemented the API. This commit also comes with several different tests, both in-kernel tests and out-of-kernel tests based on network namespaces, taking profit of the fact that sockets used by WireGuard intentionally stay in the namespace the WireGuard interface was originally created, exactly like the semantics of userspace tun devices. See wireguard.com/netns/ for pictures and examples. The source code is fairly short, but rather than combining everything into a single file, WireGuard is developed as cleanly separable files, making auditing and comprehension easier. Things are laid out as follows: * noise.[ch], cookie.[ch], messages.h: These implement the bulk of the cryptographic aspects of the protocol, and are mostly data-only in nature, taking in buffers of bytes and spitting out buffers of bytes. They also handle reference counting for their various shared pieces of data, like keys and key lists. * ratelimiter.[ch]: Used as an integral part of cookie.[ch] for ratelimiting certain types of cryptographic operations in accordance with particular WireGuard semantics. * allowedips.[ch], peerlookup.[ch]: The main lookup structures of WireGuard, the former being trie-like with particular semantics, an integral part of the design of the protocol, and the latter just being nice helper functions around the various hashtables we use. * device.[ch]: Implementation of functions for the netdevice and for rtnl, responsible for maintaining the life of a given interface and wiring it up to the rest of WireGuard. * peer.[ch]: Each interface has a list of peers, with helper functions available here for creation, destruction, and reference counting. * socket.[ch]: Implementation of functions related to udp_socket and the general set of kernel socket APIs, for sending and receiving ciphertext UDP packets, and taking care of WireGuard-specific sticky socket routing semantics for the automatic roaming. * netlink.[ch]: Userspace API entry point for configuring WireGuard peers and devices. The API has been implemented by several userspace tools and network management utility, and the WireGuard project distributes the basic wg(8) tool. * queueing.[ch]: Shared function on the rx and tx path for handling the various queues used in the multicore algorithms. * send.c: Handles encrypting outgoing packets in parallel on multiple cores, before sending them in order on a single core, via workqueues and ring buffers. Also handles sending handshake and cookie messages as part of the protocol, in parallel. * receive.c: Handles decrypting incoming packets in parallel on multiple cores, before passing them off in order to be ingested via the rest of the networking subsystem with GRO via the typical NAPI poll function. Also handles receiving handshake and cookie messages as part of the protocol, in parallel. * timers.[ch]: Uses the timer wheel to implement protocol particular event timeouts, and gives a set of very simple event-driven entry point functions for callers. * main.c, version.h: Initialization and deinitialization of the module. * selftest/*.h: Runtime unit tests for some of the most security sensitive functions. * tools/testing/selftests/wireguard/netns.sh: Aforementioned testing script using network namespaces. This commit aims to be as self-contained as possible, implementing WireGuard as a standalone module not needing much special handling or coordination from the network subsystem. I expect for future optimizations to the network stack to positively improve WireGuard, and vice-versa, but for the time being, this exists as intentionally standalone. We introduce a menu option for CONFIG_WIREGUARD, as well as providing a verbose debug log and self-tests via CONFIG_WIREGUARD_DEBUG. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Cc: David Miller <davem@davemloft.net> Cc: Greg KH <gregkh@linuxfoundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: linux-crypto@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: David S. Miller <davem@davemloft.net>
2019-12-08Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netLinus Torvalds15-51/+147
Pull networking fixes from David Miller: 1) More jumbo frame fixes in r8169, from Heiner Kallweit. 2) Fix bpf build in minimal configuration, from Alexei Starovoitov. 3) Use after free in slcan driver, from Jouni Hogander. 4) Flower classifier port ranges don't work properly in the HW offload case, from Yoshiki Komachi. 5) Use after free in hns3_nic_maybe_stop_tx(), from Yunsheng Lin. 6) Out of bounds access in mqprio_dump(), from Vladyslav Tarasiuk. 7) Fix flow dissection in dsa TX path, from Alexander Lobakin. 8) Stale syncookie timestampe fixes from Guillaume Nault. [ Did an evil merge to silence a warning introduced by this pull - Linus ] * git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (84 commits) r8169: fix rtl_hw_jumbo_disable for RTL8168evl net_sched: validate TCA_KIND attribute in tc_chain_tmplt_add() r8169: add missing RX enabling for WoL on RTL8125 vhost/vsock: accept only packets with the right dst_cid net: phy: dp83867: fix hfs boot in rgmii mode net: ethernet: ti: cpsw: fix extra rx interrupt inet: protect against too small mtu values. gre: refetch erspan header from skb->data after pskb_may_pull() pppoe: remove redundant BUG_ON() check in pppoe_pernet tcp: Protect accesses to .ts_recent_stamp with {READ,WRITE}_ONCE() tcp: tighten acceptance of ACKs not matching a child socket tcp: fix rejected syncookies due to stale timestamps lpc_eth: kernel BUG on remove tcp: md5: fix potential overestimation of TCP option space net: sched: allow indirect blocks to bind to clsact in TC net: core: rename indirect block ingress cb function net-sysfs: Call dev_hold always in netdev_queue_add_kobject net: dsa: fix flow dissection on Tx path net/tls: Fix return values to avoid ENOTSUPP net: avoid an indirect call in ____sys_recvmsg() ...
2019-12-06net/tls: Fix return values to avoid ENOTSUPPValentin Vidic1-6/+2
ENOTSUPP is not available in userspace, for example: setsockopt failed, 524, Unknown error 524 Signed-off-by: Valentin Vidic <vvidic@valentin-vidic.from.hr> Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-12-04selftests/bpf: Add a fexit/bpf2bpf test with target bpf prog no calleesYonghong Song3-19/+81
The existing fexit_bpf2bpf test covers the target progrm with callees. This patch added a test for the target program without callees. Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20191205010607.177904-1-yhs@fb.com
2019-12-04selftests: add epoll selftestsHeiher4-0/+3083
This adds the promised selftest for epoll. It will verify the wakeups of epoll. Including leaf and nested mode, epoll_wait() and poll() and multi-threads. Link: http://lkml.kernel.org/r/20191009121518.4027-1-r@hev.cc Signed-off-by: hev <r@hev.cc> Reviewed-by: Roman Penyaev <rpenyaev@suse.de> Cc: Jason Baron <jbaron@akamai.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-12-04selftests/bpf: De-flake test_tcpbpfStanislav Fomichev3-7/+20
It looks like BPF program that handles BPF_SOCK_OPS_STATE_CB state can race with the bpf_map_lookup_elem("global_map"); I sometimes see the failures in this test and re-running helps. Since we know that we expect the callback to be called 3 times (one time for listener socket, two times for both ends of the connection), let's export this number and add simple retry logic around that. Also, let's make EXPECT_EQ() not return on failure, but continue evaluating all conditions; that should make potential debugging easier. With this fix in place I don't observe the flakiness anymore. Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Cc: Lawrence Brakmo <brakmo@fb.com> Link: https://lore.kernel.org/bpf/20191204190955.170934-1-sdf@google.com
2019-12-04selftests/bpf: Bring back c++ include/link testStanislav Fomichev3-1/+26
Commit 5c26f9a78358 ("libbpf: Don't use cxx to test_libpf target") converted existing c++ test to c. We still want to include and link against libbpf from c++ code, so reinstate this test back, this time in a form of a selftest with a clear comment about its purpose. v2: * -lelf -> $(LDLIBS) (Andrii Nakryiko) Fixes: 5c26f9a78358 ("libbpf: Don't use cxx to test_libpf target") Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20191202215931.248178-1-sdf@google.com
2019-12-04selftests/bpf: Don't hard-code root cgroup idStanislav Fomichev1-1/+1
Commit 40430452fd5d ("kernfs: use 64bit inos if ino_t is 64bit") changed the way cgroup ids are exposed to the userspace. Instead of assuming fixed root id, let's query it. Fixes: 40430452fd5d ("kernfs: use 64bit inos if ino_t is 64bit") Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20191202200143.250793-1-sdf@google.com
2019-12-02Merge tag 'linux-kselftest-5.5-rc1-fixes2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftestLinus Torvalds1-3/+2
Pull more kselftest fixes from Shuah Khan: "This second Kselftest fixes update for Linux 5.5-rc1 consists of an urgent revert to fix regression in CI coverage" * tag 'linux-kselftest-5.5-rc1-fixes2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: Revert "selftests: Fix O= and KBUILD_OUTPUT handling for relative paths"
2019-12-02Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpfDavid S. Miller4-17/+17
Daniel Borkmann says: ==================== pull-request: bpf 2019-12-02 The following pull-request contains BPF updates for your *net* tree. We've added 10 non-merge commits during the last 6 day(s) which contain a total of 10 files changed, 60 insertions(+), 51 deletions(-). The main changes are: 1) Fix vmlinux BTF generation for binutils pre v2.25, from Stanislav Fomichev. 2) Fix libbpf global variable relocation to take symbol's st_value offset into account, from Andrii Nakryiko. 3) Fix libbpf build on powerpc where check_abi target fails due to different readelf output format, from Aurelien Jarno. 4) Don't set BPF insns RO for the case when they are JITed in order to avoid fragmenting the direct map, from Daniel Borkmann. 5) Fix static checker warning in btf_distill_func_proto() as well as a build error due to empty enum when BPF is compiled out, from Alexei Starovoitov. 6) Fix up generation of bpf_helper_defs.h for perf, from Arnaldo Carvalho de Melo. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2019-12-01Merge branch 'akpm' (patches from Andrew)Linus Torvalds2-0/+37
Merge updates from Andrew Morton: "Incoming: - a small number of updates to scripts/, ocfs2 and fs/buffer.c - most of MM I still have quite a lot of material (mostly not MM) staged after linux-next due to -next dependencies. I'll send those across next week as the preprequisites get merged up" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (135 commits) mm/page_io.c: annotate refault stalls from swap_readpage mm/Kconfig: fix trivial help text punctuation mm/Kconfig: fix indentation mm/memory_hotplug.c: remove __online_page_set_limits() mm: fix typos in comments when calling __SetPageUptodate() mm: fix struct member name in function comments mm/shmem.c: cast the type of unmap_start to u64 mm: shmem: use proper gfp flags for shmem_writepage() mm/shmem.c: make array 'values' static const, makes object smaller userfaultfd: require CAP_SYS_PTRACE for UFFD_FEATURE_EVENT_FORK fs/userfaultfd.c: wp: clear VM_UFFD_MISSING or VM_UFFD_WP during userfaultfd_register() userfaultfd: wrap the common dst_vma check into an inlined function userfaultfd: remove unnecessary WARN_ON() in __mcopy_atomic_hugetlb() userfaultfd: use vma_pagesize for all huge page size calculation mm/madvise.c: use PAGE_ALIGN[ED] for range checking mm/madvise.c: replace with page_size() in madvise_inject_error() mm/mmap.c: make vma_merge() comment more easy to understand mm/hwpoison-inject: use DEFINE_DEBUGFS_ATTRIBUTE to define debugfs fops autonuma: reduce cache footprint when scanning page tables autonuma: fix watermark checking in migrate_balanced_pgdat() ...
2019-12-01Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netLinus Torvalds5-31/+122
Pull networking fixes from David Miller: 1) Fix several scatter gather list issues in kTLS code, from Jakub Kicinski. 2) macb driver device remove has to kill the hresp_err_tasklet. From Chuhong Yuan. 3) Several memory leak and reference count bug fixes in tipc, from Tung Nguyen. 4) Fix mlx5 build error w/o ipv6, from Yue Haibing. 5) Fix jumbo frame and other regressions in r8169, from Heiner Kallweit. 6) Undo some BUG_ON()'s and replace them with WARN_ON_ONCE and proper error propagation/handling. From Paolo Abeni. * git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (24 commits) openvswitch: remove another BUG_ON() openvswitch: drop unneeded BUG_ON() in ovs_flow_cmd_build_info() net: phy: realtek: fix using paged operations with RTL8105e / RTL8208 r8169: fix resume on cable plug-in r8169: fix jumbo configuration for RTL8168evl net: emulex: benet: indent a Kconfig depends continuation line selftests: forwarding: fix race between packet receive and tc check net: sched: fix `tc -s class show` no bstats on class with nolock subqueues net: ethernet: ti: ale: ensure vlan/mdb deleted when no members net/mlx5e: Fix build error without IPV6 selftests: pmtu: use -oneline for ip route list cache tipc: fix duplicate SYN messages under link congestion tipc: fix wrong timeout input for tipc_wait_for_cond() tipc: fix wrong socket reference counter after tipc_sk_timeout() returns tipc: fix potential memory leak in __tipc_sendmsg() net: macb: add missed tasklet_kill selftests: bpf: correct perror strings selftests: bpf: test_sockmap: handle file creation failures gracefully net/tls: use sg_next() to walk sg entries net/tls: remove the dead inplace_crypto code ...
2019-12-01Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds1-9/+85
Pull x86 fixes from Ingo Molnar: "Various fixes: - Fix the PAT performance regression that downgraded write-combining device memory regions to uncached. - There's been a number of bugs in 32-bit double fault handling - hopefully all fixed now. - Fix an LDT crash - Fix an FPU over-optimization that broke with GCC9 code optimizations. - Misc cleanups" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mm/pat: Fix off-by-one bugs in interval tree search x86/ioperm: Save an indentation level in tss_update_io_bitmap() x86/fpu: Don't cache access to fpu_fpregs_owner_ctx x86/entry/32: Remove unused 'restore_all_notrace' local label x86/ptrace: Document FSBASE and GSBASE ABI oddities x86/ptrace: Remove set_segment_reg() implementations for current x86/traps: die() instead of panicking on a double fault x86/doublefault/32: Rewrite the x86_32 #DF handler and unify with 64-bit x86/doublefault/32: Move #DF stack and TSS to cpu_entry_area x86/doublefault/32: Rename doublefault.c to doublefault_32.c x86/traps: Disentangle the 32-bit and 64-bit doublefault code lkdtm: Add a DOUBLE_FAULT crash type on x86 selftests/x86/single_step_syscall: Check SYSENTER directly x86/mm/32: Sync only to VMALLOC_END in vmalloc_sync_all()
2019-12-01selftests: vm: add fragment CONFIG_TEST_VMALLOCAnders Roxell1-0/+1
When running test_vmalloc.sh smoke the following print out states that the fragment is missing. # ./test_vmalloc.sh: You must have the following enabled in your kernel: # CONFIG_TEST_VMALLOC=m Rework to add the fragment 'CONFIG_TEST_VMALLOC=m' to the config file. Link: http://lkml.kernel.org/r/20190916095217.19665-1-anders.roxell@linaro.org Fixes: a05ef00c9790 ("selftests/vm: add script helper for CONFIG_TEST_VMALLOC_MODULE") Signed-off-by: Anders Roxell <anders.roxell@linaro.org> Cc: Shuah Khan <shuah@kernel.org> Cc: "Uladzislau Rezki (Sony)" <urezki@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-12-01memfd: add test for COW on MAP_PRIVATE and F_SEAL_FUTURE_WRITE mappingsJoel Fernandes (Google)1-0/+36
In this test, the parent and child both have writable private mappings. The test shows that without the patch in this series, the parent and child shared the same memory which is incorrect. In other words, COW needs to be triggered so any writes to child's copy stays local to the child. Link: http://lkml.kernel.org/r/20191107195355.80608-2-joel@joelfernandes.org Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org> Cc: Hugh Dickins <hughd@google.com> Cc: Nicolas Geoffray <ngeoffray@google.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-11-30Merge tag 'seccomp-v5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linuxLinus Torvalds1-1/+109
Pull seccomp updates from Kees Cook: "Mostly this is implementing the new flag SECCOMP_USER_NOTIF_FLAG_CONTINUE, but there are cleanups as well. - implement SECCOMP_USER_NOTIF_FLAG_CONTINUE (Christian Brauner) - fixes to selftests (Christian Brauner) - remove secure_computing() argument (Christian Brauner)" * tag 'seccomp-v5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: seccomp: rework define for SECCOMP_USER_NOTIF_FLAG_CONTINUE seccomp: fix SECCOMP_USER_NOTIF_FLAG_CONTINUE test seccomp: simplify secure_computing() seccomp: test SECCOMP_USER_NOTIF_FLAG_CONTINUE seccomp: add SECCOMP_USER_NOTIF_FLAG_CONTINUE seccomp: avoid overflow in implicit constant conversion
2019-11-30Merge tag 'powerpc-5.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linuxLinus Torvalds14-218/+833
Pull powerpc updates from Michael Ellerman: "Highlights: - Infrastructure for secure boot on some bare metal Power9 machines. The firmware support is still in development, so the code here won't actually activate secure boot on any existing systems. - A change to xmon (our crash handler / pseudo-debugger) to restrict it to read-only mode when the kernel is lockdown'ed, otherwise it's trivial to drop into xmon and modify kernel data, such as the lockdown state. - Support for KASLR on 32-bit BookE machines (Freescale / NXP). - Fixes for our flush_icache_range() and __kernel_sync_dicache() (VDSO) to work with memory ranges >4GB. - Some reworks of the pseries CMM (Cooperative Memory Management) driver to make it behave more like other balloon drivers and enable some cleanups of generic mm code. - A series of fixes to our hardware breakpoint support to properly handle unaligned watchpoint addresses. Plus a bunch of other smaller improvements, fixes and cleanups. Thanks to: Alastair D'Silva, Andrew Donnellan, Aneesh Kumar K.V, Anthony Steinhauser, C├ędric Le Goater, Chris Packham, Chris Smart, Christophe Leroy, Christopher M. Riedl, Christoph Hellwig, Claudio Carvalho, Daniel Axtens, David Hildenbrand, Deb McLemore, Diana Craciun, Eric Richter, Geert Uytterhoeven, Greg Kroah-Hartman, Greg Kurz, Gustavo L. F. Walbon, Hari Bathini, Harish, Jason Yan, Krzysztof Kozlowski, Leonardo Bras, Mathieu Malaterre, Mauro S. M. Rodrigues, Michal Suchanek, Mimi Zohar, Nathan Chancellor, Nathan Lynch, Nayna Jain, Nick Desaulniers, Oliver O'Halloran, Qian Cai, Rasmus Villemoes, Ravi Bangoria, Sam Bobroff, Santosh Sivaraj, Scott Wood, Thomas Huth, Tyrel Datwyler, Vaibhav Jain, Valentin Longchamp, YueHaibing" * tag 'powerpc-5.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (144 commits) powerpc/fixmap: fix crash with HIGHMEM x86/efi: remove unused variables powerpc: Define arch_is_kernel_initmem_freed() for lockdep powerpc/prom_init: Use -ffreestanding to avoid a reference to bcmp powerpc: Avoid clang warnings around setjmp and longjmp powerpc: Don't add -mabi= flags when building with Clang powerpc: Fix Kconfig indentation powerpc/fixmap: don't clear fixmap area in paging_init() selftests/powerpc: spectre_v2 test must be built 64-bit powerpc/powernv: Disable native PCIe port management powerpc/kexec: Move kexec files into a dedicated subdir. powerpc/32: Split kexec low level code out of misc_32.S powerpc/sysdev: drop simple gpio powerpc/83xx: map IMMR with a BAT. powerpc/32s: automatically allocate BAT in setbat() powerpc/ioremap: warn on early use of ioremap() powerpc: Add support for GENERIC_EARLY_IOREMAP powerpc/fixmap: Use __fix_to_virt() instead of fix_to_virt() powerpc/8xx: use the fixmapped IMMR in cpm_reset() powerpc/8xx: add __init to cpm1 init functions ...
2019-11-30selftests: forwarding: fix race between packet receive and tc checkJiri Pirko1-8/+31
It is possible that tc stats get checked before the packet we check for actually arrived into the interface and accounted for. Fix it by checking for the expected result in a loop until timeout is reached (by default 1 second). Fixes: 07e5c75184a1 ("selftests: forwarding: Introduce tc flower matching tests") Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-29selftests: pmtu: use -oneline for ip route list cacheThadeu Lima de Souza Cascardo1-3/+2
Some versions of iproute2 will output more than one line per entry, which will cause the test to fail, like: TEST: ipv6: list and flush cached exceptions [FAIL] can't list cached exceptions That happens, for example, with iproute2 4.15.0. When using the -oneline option, this will work just fine: TEST: ipv6: list and flush cached exceptions [ OK ] This also works just fine with a more recent version of iproute2, like 5.4.0. For some reason, two lines are printed for the IPv4 test no matter what version of iproute2 is used. Use the same -oneline parameter there instead of counting the lines twice. Fixes: b964641e9925 ("selftests: pmtu: Make list_flush_ipv6_exception test more demanding") Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com> Acked-by: Stefano Brivio <sbrivio@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-28selftests: bpf: correct perror stringsJakub Kicinski2-20/+20
perror(str) is basically equivalent to print("%s: %s\n", str, strerror(errno)). New line or colon at the end of str is a mistake/breaks formatting. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Simon Horman <simon.horman@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-28selftests: bpf: test_sockmap: handle file creation failures gracefullyJakub Kicinski1-0/+9
test_sockmap creates a temporary file to use for sendpage. this may fail for various reasons. Handle the error rather than segfault. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Simon Horman <simon.horman@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-28selftests/tls: add a test for fragmented messagesJakub Kicinski1-0/+60
Add a sendmsg test with very fragmented messages. This should fill up sk_msg and test the boundary conditions. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Simon Horman <simon.horman@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-28Revert "selftests: Fix O= and KBUILD_OUTPUT handling for relative paths"Shuah Khan1-3/+2
This reverts commit 303e6218ecec475d5bc3e5922dec770ee5baf107. This patch breaks several CI use-cases that run kselftest builds without using main Makefile. This fix depends on abs_objtree which is undefined when kselftest build is invoked on selftests Makefile without going through the main Makefile. Revert this for now as this patch impacts selftest runs. Fixes: 303e6218ecec ("selftests: Fix O= and KBUILD_OUTPUT handling for relative paths") Reported-by: Cristian Marussi <cristian.marussi@arm.com> Reported-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2019-11-27libbpf: Fix global variable relocationAndrii Nakryiko4-17/+17
Similarly to a0d7da26ce86 ("libbpf: Fix call relocation offset calculation bug"), relocations against global variables need to take into account referenced symbol's st_value, which holds offset into a corresponding data section (and, subsequently, offset into internal backing map). For static variables this offset is always zero and data offset is completely described by respective instruction's imm field. Convert a bunch of selftests to global variables. Previously they were relying on `static volatile` trick to ensure Clang doesn't inline static variables, which with global variables is not necessary anymore. Fixes: 393cdfbee809 ("libbpf: Support initialized global variables") Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20191127200651.1381348-1-andriin@fb.com
2019-11-27Merge tag 'trace-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-traceLinus Torvalds9-13/+249
Pull tracing updates from Steven Rostedt: "New tracing features: - New PERMANENT flag to ftrace_ops when attaching a callback to a function. As /proc/sys/kernel/ftrace_enabled when set to zero will disable all attached callbacks in ftrace, this has a detrimental impact on live kernel tracing, as it disables all that it patched. If a ftrace_ops is registered to ftrace with the PERMANENT flag set, it will prevent ftrace_enabled from being disabled, and if ftrace_enabled is already disabled, it will prevent a ftrace_ops with PREMANENT flag set from being registered. - New register_ftrace_direct(). As eBPF would like to register its own trampolines to be called by the ftrace nop locations directly, without going through the ftrace trampoline, this function has been added. This allows for eBPF trampolines to live along side of ftrace, perf, kprobe and live patching. It also utilizes the ftrace enabled_functions file that keeps track of functions that have been modified in the kernel, to allow for security auditing. - Allow for kernel internal use of ftrace instances. Subsystems in the kernel can now create and destroy their own tracing instances which allows them to have their own tracing buffer, and be able to record events without worrying about other users from writing over their data. - New seq_buf_hex_dump() that lets users use the hex_dump() in their seq_buf usage. - Notifications now added to tracing_max_latency to allow user space to know when a new max latency is hit by one of the latency tracers. - Wider spread use of generic compare operations for use of bsearch and friends. - More synthetic event fields may be defined (32 up from 16) - Use of xarray for architectures with sparse system calls, for the system call trace events. This along with small clean ups and fixes" * tag 'trace-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (51 commits) tracing: Enable syscall optimization for MIPS tracing: Use xarray for syscall trace events tracing: Sample module to demonstrate kernel access to Ftrace instances. tracing: Adding new functions for kernel access to Ftrace instances tracing: Fix Kconfig indentation ring-buffer: Fix typos in function ring_buffer_producer ftrace: Use BIT() macro ftrace: Return ENOTSUPP when DYNAMIC_FTRACE_WITH_DIRECT_CALLS is not configured ftrace: Rename ftrace_graph_stub to ftrace_stub_graph ftrace: Add a helper function to modify_ftrace_direct() to allow arch optimization ftrace: Add helper find_direct_entry() to consolidate code ftrace: Add another check for match in register_ftrace_direct() ftrace: Fix accounting bug with direct->count in register_ftrace_direct() ftrace/selftests: Fix spelling mistake "wakeing" -> "waking" tracing: Increase SYNTH_FIELDS_MAX for synthetic_events ftrace/samples: Add a sample module that implements modify_ftrace_direct() ftrace: Add modify_ftrace_direct() tracing: Add missing "inline" in stub function of latency_fsnotify() tracing: Remove stray tab in TRACE_EVAL_MAP_FILE's help text tracing: Use seq_buf_hex_dump() to dump buffers ...
2019-11-27Merge tag 'riscv/for-v5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linuxLinus Torvalds1-1/+7
Pull RISC-V updates from Paul Walmsley: "New features: - SECCOMP support - nommu support - SBI-less system support - M-Mode support - TLB flush optimizations Other improvements: - Pass the complete RISC-V ISA string supported by the CPU cores to userspace, rather than redacting parts of it in the kernel - Add platform DMA IP block data to the HiFive Unleashed board DT file - Add Makefile support for BZ2, LZ4, LZMA, LZO kernel image compression formats, in line with other architectures Cleanups: - Remove unnecessary PTE_PARENT_SIZE macro - Standardize include guard naming across arch/riscv" * tag 'riscv/for-v5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (22 commits) riscv: provide a flat image loader riscv: add nommu support riscv: clear the instruction cache and all registers when booting riscv: read the hart ID from mhartid on boot riscv: provide native clint access for M-mode riscv: dts: add support for PDMA device of HiFive Unleashed Rev A00 riscv: add support for MMIO access to the timer registers riscv: implement remote sfence.i using IPIs riscv: cleanup the default power off implementation riscv: poison SBI calls for M-mode riscv: don't allow selecting SBI based drivers for M-mode RISC-V: Add multiple compression image format. riscv: clean up the macro format in each header file riscv: Use PMD_SIZE to replace PTE_PARENT_SIZE riscv: abstract out CSR names for supervisor vs machine mode riscv: separate MMIO functions into their own header file riscv: enter WFI in default_power_off() if SBI does not shutdown RISC-V: Issue a tlb page flush if possible RISC-V: Issue a local tlbflush if possible. RISC-V: Do not invoke SBI call if cpumask is empty ...
2019-11-26Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds8-22/+0
Pull RCU updates from Ingo Molnar: "The main changes in this cycle were: - Dynamic tick (nohz) updates, perhaps most notably changes to force the tick on when needed due to lengthy in-kernel execution on CPUs on which RCU is waiting. - Linux-kernel memory consistency model updates. - Replace rcu_swap_protected() with rcu_prepace_pointer(). - Torture-test updates. - Documentation updates. - Miscellaneous fixes" * 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (51 commits) security/safesetid: Replace rcu_swap_protected() with rcu_replace_pointer() net/sched: Replace rcu_swap_protected() with rcu_replace_pointer() net/netfilter: Replace rcu_swap_protected() with rcu_replace_pointer() net/core: Replace rcu_swap_protected() with rcu_replace_pointer() bpf/cgroup: Replace rcu_swap_protected() with rcu_replace_pointer() fs/afs: Replace rcu_swap_protected() with rcu_replace_pointer() drivers/scsi: Replace rcu_swap_protected() with rcu_replace_pointer() drm/i915: Replace rcu_swap_protected() with rcu_replace_pointer() x86/kvm/pmu: Replace rcu_swap_protected() with rcu_replace_pointer() rcu: Upgrade rcu_swap_protected() to rcu_replace_pointer() rcu: Suppress levelspread uninitialized messages rcu: Fix uninitialized variable in nocb_gp_wait() rcu: Update descriptions for rcu_future_grace_period tracepoint rcu: Update descriptions for rcu_nocb_wake tracepoint rcu: Remove obsolete descriptions for rcu_barrier tracepoint rcu: Ensure that ->rcu_urgent_qs is set before resched IPI workqueue: Convert for_each_wq to use built-in list check rcu: Several rcu_segcblist functions can be static rcu: Remove unused function hlist_bl_del_init_rcu() Documentation: Rename rcu_node_context_switch() to rcu_note_context_switch() ...
2019-11-26selftests/x86/single_step_syscall: Check SYSENTER directlyAndy Lutomirski1-9/+85
We used to test SYSENTER only through the vDSO. Test it directly too, just in case. Signed-off-by: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-11-26Merge branch 'x86-iopl-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds2-12/+133
Pull x86 iopl updates from Ingo Molnar: "This implements a nice simplification of the iopl and ioperm code that Thomas Gleixner discovered: we can implement the IO privilege features of the iopl system call by using the IO permission bitmap in permissive mode, while trapping CLI/STI/POPF/PUSHF uses in user-space if they change the interrupt flag. This implements that feature, with testing facilities and related cleanups" [ "Simplification" may be an over-statement. The main goal is to avoid the cli/sti of iopl by effectively implementing the IO port access parts of iopl in terms of ioperm. This may end up not workign well in case people actually depend on cli/sti being available, or if there are mixed uses of iopl and ioperm. We will see.. - Linus ] * 'x86-iopl-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (22 commits) x86/ioperm: Fix use of deprecated config option x86/entry/32: Clarify register saving in __switch_to_asm() selftests/x86/iopl: Extend test to cover IOPL emulation x86/ioperm: Extend IOPL config to control ioperm() as well x86/iopl: Remove legacy IOPL option x86/iopl: Restrict iopl() permission scope x86/iopl: Fixup misleading comment selftests/x86/ioperm: Extend testing so the shared bitmap is exercised x86/ioperm: Share I/O bitmap if identical x86/ioperm: Remove bitmap if all permissions dropped x86/ioperm: Move TSS bitmap update to exit to user work x86/ioperm: Add bitmap sequence number x86/ioperm: Move iobitmap data into a struct x86/tss: Move I/O bitmap data into a seperate struct x86/io: Speedup schedule out of I/O bitmap user x86/ioperm: Avoid bitmap allocation if no permissions are set x86/ioperm: Simplify first ioperm() invocation logic x86/iopl: Cleanup include maze x86/tss: Fix and move VMX BUILD_BUG_ON() x86/cpu: Unify cpu_init() ...
2019-11-26Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds2-1/+15
Pull x86 fixes from Ingo Molnar: "These are the fixes left over from the v5.4 cycle: - Various low level 32-bit entry code fixes and improvements by Andy Lutomirski, Peter Zijlstra and Thomas Gleixner. - Fix 32-bit Xen PV breakage, by Jan Beulich" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/entry/32: Fix FIXUP_ESPFIX_STACK with user CR3 x86/pti/32: Calculate the various PTI cpu_entry_area sizes correctly, make the CPU_ENTRY_AREA_PAGES assert precise selftests/x86/sigreturn/32: Invalidate DS and ES when abusing the kernel selftests/x86/mov_ss_trap: Fix the SYSENTER test x86/entry/32: Fix NMI vs ESPFIX x86/entry/32: Unwind the ESPFIX stack earlier on exception entry x86/entry/32: Move FIXUP_FRAME after pushing %fs in SAVE_ALL x86/entry/32: Use %ss segment where required x86/entry/32: Fix IRET exception x86/cpu_entry_area: Add guard page for entry stack on 32bit x86/pti/32: Size initial_page_table correctly x86/doublefault/32: Fix stack canaries in the double fault handler x86/xen/32: Simplify ring check in xen_iret_crit_fixup() x86/xen/32: Make xen_iret_crit_fixup() independent of frame layout x86/stackframe/32: Repair 32-bit Xen PV
2019-11-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextLinus Torvalds146-1507/+8663
Pull networking updates from David Miller: "Another merge window, another pull full of stuff: 1) Support alternative names for network devices, from Jiri Pirko. 2) Introduce per-netns netdev notifiers, also from Jiri Pirko. 3) Support MSG_PEEK in vsock/virtio, from Matias Ezequiel Vara Larsen. 4) Allow compiling out the TLS TOE code, from Jakub Kicinski. 5) Add several new tracepoints to the kTLS code, also from Jakub. 6) Support set channels ethtool callback in ena driver, from Sameeh Jubran. 7) New SCTP events SCTP_ADDR_ADDED, SCTP_ADDR_REMOVED, SCTP_ADDR_MADE_PRIM, and SCTP_SEND_FAILED_EVENT. From Xin Long. 8) Add XDP support to mvneta driver, from Lorenzo Bianconi. 9) Lots of netfilter hw offload fixes, cleanups and enhancements, from Pablo Neira Ayuso. 10) PTP support for aquantia chips, from Egor Pomozov. 11) Add UDP segmentation offload support to igb, ixgbe, and i40e. From Josh Hunt. 12) Add smart nagle to tipc, from Jon Maloy. 13) Support L2 field rewrite by TC offloads in bnxt_en, from Venkat Duvvuru. 14) Add a flow mask cache to OVS, from Tonghao Zhang. 15) Add XDP support to ice driver, from Maciej Fijalkowski. 16) Add AF_XDP support to ice driver, from Krzysztof Kazimierczak. 17) Support UDP GSO offload in atlantic driver, from Igor Russkikh. 18) Support it in stmmac driver too, from Jose Abreu. 19) Support TIPC encryption and auth, from Tuong Lien. 20) Introduce BPF trampolines, from Alexei Starovoitov. 21) Make page_pool API more numa friendly, from Saeed Mahameed. 22) Introduce route hints to ipv4 and ipv6, from Paolo Abeni. 23) Add UDP segmentation offload to cxgb4, Rahul Lakkireddy" * git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1857 commits) libbpf: Fix usage of u32 in userspace code mm: Implement no-MMU variant of vmalloc_user_node_flags slip: Fix use-after-free Read in slip_open net: dsa: sja1105: fix sja1105_parse_rgmii_delays() macvlan: schedule bc_work even if error enetc: add support Credit Based Shaper(CBS) for hardware offload net: phy: add helpers phy_(un)lock_mdio_bus mdio_bus: don't use managed reset-controller ax88179_178a: add ethtool_op_get_ts_info() mlxsw: spectrum_router: Fix use of uninitialized adjacency index mlxsw: spectrum_router: After underlay moves, demote conflicting tunnels bpf: Simplify __bpf_arch_text_poke poke type handling bpf: Introduce BPF_TRACE_x helper for the tracing tests bpf: Add bpf_jit_blinding_enabled for !CONFIG_BPF_JIT bpf, testing: Add various tail call test cases bpf, x86: Emit patchable direct jump as tail call bpf: Constant map key tracking for prog array pokes bpf: Add poke dependency tracking for prog array maps bpf: Add initial poke descriptor table for jit images bpf: Move owner type, jited info into array auxiliary data ...
2019-11-25Merge tag 'livepatching-for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatchingLinus Torvalds3-1/+183
Pull livepatching updates from Petr Mladek: - New API to track system state changes done be livepatch callbacks. It helps to maintain compatibility between livepatches. - Update Kconfig help text. ORC is another reliable unwinder. - Disable generic selftest timeout. Livepatch selftests have their own per-operation fine-grained timeouts. * tag 'livepatching-for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching: x86/stacktrace: update kconfig help text for reliable unwinders livepatch: Selftests of the API for tracking system state changes livepatch: Documentation of the new API for tracking system state changes livepatch: Allow to distinguish different version of system state changes livepatch: Basic API to track system state changes livepatch: Keep replaced patches until post_patch callback is called selftests/livepatch: Disable the timeout
2019-11-25Merge branch 'for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroupLinus Torvalds7-8/+298
Pull cgroup updates from Tejun Heo: "There are several notable changes here: - Single thread migrating itself has been optimized so that it doesn't need threadgroup rwsem anymore. - Freezer optimization to avoid unnecessary frozen state changes. - cgroup ID unification so that cgroup fs ino is the only unique ID used for the cgroup and can be used to directly look up live cgroups through filehandle interface on 64bit ino archs. On 32bit archs, cgroup fs ino is still the only ID in use but it is only unique when combined with gen. - selftest and other changes" * 'for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: (24 commits) writeback: fix -Wformat compilation warnings docs: cgroup: mm: Fix spelling of "list" cgroup: fix incorrect WARN_ON_ONCE() in cgroup_setup_root() cgroup: use cgrp->kn->id as the cgroup ID kernfs: use 64bit inos if ino_t is 64bit kernfs: implement custom exportfs ops and fid type kernfs: combine ino/id lookup functions into kernfs_find_and_get_node_by_id() kernfs: convert kernfs_node->id from union kernfs_node_id to u64 kernfs: kernfs_find_and_get_node_by_ino() should only look up activated nodes kernfs: use dumber locking for kernfs_find_and_get_node_by_ino() netprio: use css ID instead of cgroup ID writeback: use ino_t for inodes in tracepoints kernfs: fix ino wrap-around detection kselftests: cgroup: Avoid the reuse of fd after it is deallocated cgroup: freezer: don't change task and cgroups status unnecessarily cgroup: use cgroup->last_bstat instead of cgroup->bstat_pending for consistency cgroup: remove cgroup_enable_task_cg_lists() optimization cgroup: pids: use atomic64_t for pids->limit selftests: cgroup: Run test_core under interfering stress selftests: cgroup: Add task migration tests ...
2019-11-25Merge tag 'threads-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linuxLinus Torvalds9-1/+1098
Pull thread management updates from Christian Brauner: - A pidfd's fdinfo file currently contains the field "Pid:\t<pid>" where <pid> is the pid of the process in the pid namespace of the procfs instance the fdinfo file for the pidfd was opened in. The fdinfo file has now gained a new "NSpid:\t<ns-pid1>[\t<ns-pid2>[...]]" field which lists the pids of the process in all child pid namespaces provided the pid namespace of the procfs instance it is looked up under has an ancestoral relationship with the pid namespace of the process. If it does not 0 will be shown and no further pid namespaces will be listed. Tests included. (Christian Kellner) - If the process the pidfd references has already exited, print -1 for the Pid and NSpid fields in the pidfd's fdinfo file. Tests included. (me) - Add CLONE_CLEAR_SIGHAND. This lets callers clear all signal handler that are not SIG_DFL or SIG_IGN at process creation time. This originated as a feature request from glibc to improve performance and elimate races in their posix_spawn() implementation. Tests included. (me) - Add support for choosing a specific pid for a process with clone3(). This is the feature which was part of the thread update for v5.4 but after a discussion at LPC in Lisbon we decided to delay it for one more cycle in order to make the interface more generic. This has now done. It is now possible to choose a specific pid in a whole pid namespaces (sub)hierarchy instead of just one pid namespace. In order to choose a specific pid the caller must have CAP_SYS_ADMIN in all owning user namespaces of the target pid namespaces. Tests included. (Adrian Reber) - Test improvements and extensions. (Andrei Vagin, me) * tag 'threads-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux: selftests/clone3: skip if clone3() is ENOSYS selftests/clone3: check that all pids are released on error paths selftests/clone3: report a correct number of fails selftests/clone3: flush stdout and stderr before clone3() and _exit() selftests: add tests for clone3() with *set_tid fork: extend clone3() to support setting a PID selftests: add tests for clone3() tests: test CLONE_CLEAR_SIGHAND clone3: add CLONE_CLEAR_SIGHAND pid: use pid_has_task() in pidfd_open() exit: use pid_has_task() in do_wait() pid: use pid_has_task() in __change_pid() test: verify fdinfo for pidfd of reaped process pidfd: check pid has attached task in fdinfo pidfd: add tests for NSpid info in fdinfo pidfd: add NSpid entries to fdinfo
2019-11-25Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds7-21/+158
Pull KVM updates from Paolo Bonzini: "ARM: - data abort report and injection - steal time support - GICv4 performance improvements - vgic ITS emulation fixes - simplify FWB handling - enable halt polling counters - make the emulated timer PREEMPT_RT compliant s390: - small fixes and cleanups - selftest improvements - yield improvements PPC: - add capability to tell userspace whether we can single-step the guest - improve the allocation of XIVE virtual processor IDs - rewrite interrupt synthesis code to deliver interrupts in virtual mode when appropriate. - minor cleanups and improvements. x86: - XSAVES support for AMD - more accurate report of nested guest TSC to the nested hypervisor - retpoline optimizations - support for nested 5-level page tables - PMU virtualization optimizations, and improved support for nested PMU virtualization - correct latching of INITs for nested virtualization - IOAPIC optimization - TSX_CTRL virtualization for more TAA happiness - improved allocation and flushing of SEV ASIDs - many bugfixes and cleanups" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (127 commits) kvm: nVMX: Relax guest IA32_FEATURE_CONTROL constraints KVM: x86: Grab KVM's srcu lock when setting nested state KVM: x86: Open code shared_msr_update() in its only caller KVM: Fix jump label out_free_* in kvm_init() KVM: x86: Remove a spurious export of a static function KVM: x86: create mmu/ subdirectory KVM: nVMX: Remove unnecessary TLB flushes on L1<->L2 switches when L1 use apic-access-page KVM: x86: remove set but not used variable 'called' KVM: nVMX: Do not mark vmcs02->apic_access_page as dirty when unpinning KVM: vmx: use MSR_IA32_TSX_CTRL to hard-disable TSX on guest that lack it KVM: vmx: implement MSR_IA32_TSX_CTRL disable RTM functionality KVM: x86: implement MSR_IA32_TSX_CTRL effect on CPUID KVM: x86: do not modify masked bits of shared MSRs KVM: x86: fix presentation of TSX feature in ARCH_CAPABILITIES KVM: PPC: Book3S HV: XIVE: Fix potential page leak on error path KVM: PPC: Book3S HV: XIVE: Free previous EQ page when setting up a new one KVM: nVMX: Assume TLB entries of L1 and L2 are tagged differently if L0 use EPT KVM: x86: Unexport kvm_vcpu_reload_apic_access_page() KVM: nVMX: add CR4_LA57 bit to nested CR4_FIXED1 KVM: nVMX: Use semi-colon instead of comma for exit-handlers initialization ...
2019-11-25Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linuxLinus Torvalds32-5/+1623
Pull arm64 updates from Catalin Marinas: "Apart from the arm64-specific bits (core arch and perf, new arm64 selftests), it touches the generic cow_user_page() (reviewed by Kirill) together with a macro for x86 to preserve the existing behaviour on this architecture. Summary: - On ARMv8 CPUs without hardware updates of the access flag, avoid failing cow_user_page() on PFN mappings if the pte is old. The patches introduce an arch_faults_on_old_pte() macro, defined as false on x86. When true, cow_user_page() makes the pte young before attempting __copy_from_user_inatomic(). - Covert the synchronous exception handling paths in arch/arm64/kernel/entry.S to C. - FTRACE_WITH_REGS support for arm64. - ZONE_DMA re-introduced on arm64 to support Raspberry Pi 4 - Several kselftest cases specific to arm64, together with a MAINTAINERS update for these files (moved to the ARM64 PORT entry). - Workaround for a Neoverse-N1 erratum where the CPU may fetch stale instructions under certain conditions. - Workaround for Cortex-A57 and A72 errata where the CPU may speculatively execute an AT instruction and associate a VMID with the wrong guest page tables (corrupting the TLB). - Perf updates for arm64: additional PMU topologies on HiSilicon platforms, support for CCN-512 interconnect, AXI ID filtering in the IMX8 DDR PMU, support for the CCPI2 uncore PMU in ThunderX2. - GICv3 optimisation to avoid a heavy barrier when accessing the ICC_PMR_EL1 register. - ELF HWCAP documentation updates and clean-up. - SMC calling convention conduit code clean-up. - KASLR diagnostics printed during boot - NVIDIA Carmel CPU added to the KPTI whitelist - Some arm64 mm clean-ups: use generic free_initrd_mem(), remove stale macro, simplify calculation in __create_pgd_mapping(), typos. - Kconfig clean-ups: CMDLINE_FORCE to depend on CMDLINE, choice for endinanness to help with allmodconfig" * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (93 commits) arm64: Kconfig: add a choice for endianness kselftest: arm64: fix spelling mistake "contiguos" -> "contiguous" arm64: Kconfig: make CMDLINE_FORCE depend on CMDLINE MAINTAINERS: Add arm64 selftests to the ARM64 PORT entry arm64: kaslr: Check command line before looking for a seed arm64: kaslr: Announce KASLR status on boot kselftest: arm64: fake_sigreturn_misaligned_sp kselftest: arm64: fake_sigreturn_bad_size kselftest: arm64: fake_sigreturn_duplicated_fpsimd kselftest: arm64: fake_sigreturn_missing_fpsimd kselftest: arm64: fake_sigreturn_bad_size_for_magic0 kselftest: arm64: fake_sigreturn_bad_magic kselftest: arm64: add helper get_current_context kselftest: arm64: extend test_init functionalities kselftest: arm64: mangle_pstate_invalid_mode_el[123][ht] kselftest: arm64: mangle_pstate_invalid_daif_bits kselftest: arm64: mangle_pstate_invalid_compat_toggle and common utils kselftest: arm64: extend toplevel skeleton Makefile drivers/perf: hisi: update the sccl_id/ccl_id for certain HiSilicon platform arm64: mm: reserve CMA and crashkernel in ZONE_DMA32 ...
2019-11-25Merge tag 'linux-kselftest-5.5-rc1-kunit' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftestLinus Torvalds13-0/+1210
Pull kselftest KUnit support gtom Shuah Khan: "This adds KUnit, a lightweight unit testing and mocking framework for the Linux kernel from Brendan Higgins. KUnit is not an end-to-end testing framework. It is currently supported on UML and sub-systems can write unit tests and run them in UML env. KUnit documentation is included in this update. In addition, this Kunit update adds 3 new kunit tests: - proc sysctl test from Iurii Zaikin - the 'list' doubly linked list test from David Gow - ext4 tests for decoding extended timestamps from Iurii Zaikin In the future KUnit will be linked to Kselftest framework to provide a way to trigger KUnit tests from user-space" * tag 'linux-kselftest-5.5-rc1-kunit' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (23 commits) lib/list-test: add a test for the 'list' doubly linked list ext4: add kunit test for decoding extended timestamps Documentation: kunit: Fix verification command kunit: Fix '--build_dir' option kunit: fix failure to build without printk MAINTAINERS: add proc sysctl KUnit test to PROC SYSCTL section kernel/sysctl-test: Add null pointer test for sysctl.c:proc_dointvec() MAINTAINERS: add entry for KUnit the unit testing framework Documentation: kunit: add documentation for KUnit kunit: defconfig: add defconfigs for building KUnit tests kunit: tool: add Python wrappers for running KUnit tests kunit: test: add tests for KUnit managed resources kunit: test: add the concept of assertions kunit: test: add tests for kunit test abort kunit: test: add support for test abort objtool: add kunit_try_catch_throw to the noreturn list kunit: test: add initial tests lib: enable building KUnit in lib/ kunit: test: add the concept of expectations kunit: test: add assertion printing library ...
2019-11-25Merge tag 'linux-kselftest-5.5-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftestLinus Torvalds17-40/+68
Pull kselftest fixes from Shuah Khan: "This consists of several fixes to tests and framework. Masami Hiramatsu fixed several tests to build and run correctly on arm and other 32bit architectures" * tag 'linux-kselftest-5.5-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: selftests: sync: Fix cast warnings on arm selftests: net: Fix printf format warnings on arm selftests: net: Use size_t and ssize_t for counting file size selftests: vm: Build/Run 64bit tests only on 64bit arch selftests: proc: Make va_max 1MB kselftest: Fix NULL INSTALL_PATH for TARGETS runlist selftests: Move kselftest_module.sh into kselftest/ selftests: gen_kselftest_tar.sh: Do not clobber kselftest/ selftests: breakpoints: Fix a typo of function name selftests: Fix O= and KBUILD_OUTPUT handling for relative paths
2019-11-25Merge branch 'for-5.5/system-state' into for-linusPetr Mladek2-1/+182
2019-11-24bpf: Introduce BPF_TRACE_x helper for the tracing testsMartin KaFai Lau6-174/+125
For BPF_PROG_TYPE_TRACING, the bpf_prog's ctx is an array of u64. This patch borrows the idea from BPF_CALL_x in filter.h to convert a u64 to the arg type of the traced function. The new BPF_TRACE_x has an arg to specify the return type of a bpf_prog. It will be used in the future TCP-ops bpf_prog that may return "void". The new macros are defined in the new header file "bpf_trace_helpers.h". It is under selftests/bpf/ for now. It could be moved to libbpf later after seeing more upcoming non-tracing use cases. The tests are changed to use these new macros also. Hence, the k[s]u8/16/32/64 are no longer needed and they are removed from the bpf_helpers.h. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20191123202504.1502696-1-kafai@fb.com