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2019-01-08Infrastructure management of the cred security blobCasey Schaufler1-0/+4
Move management of the cred security blob out of the security modules and into the security infrastructre. Instead of allocating and freeing space the security modules tell the infrastructure how much space they require. Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> Reviewed-by: Kees Cook <keescook@chromium.org> [kees: adjusted for ordered init series] Signed-off-by: Kees Cook <keescook@chromium.org>
2017-11-27Rename superblock flags (MS_xyz -> SB_xyz)Linus Torvalds1-1/+1
This is a pure automated search-and-replace of the internal kernel superblock flags. The s_flags are now called SB_*, with the names and the values for the moment mirroring the MS_* flags that they're equivalent to. Note how the MS_xyz flags are the ones passed to the mount system call, while the SB_xyz flags are what we then use in sb->s_flags. The script to do this was: # places to look in; re security/*: it generally should *not* be # touched (that stuff parses mount(2) arguments directly), but # there are two places where we really deal with superblock flags. FILES="drivers/mtd drivers/staging/lustre fs ipc mm \ include/linux/fs.h include/uapi/linux/bfs_fs.h \ security/apparmor/apparmorfs.c security/apparmor/include/lib.h" # the list of MS_... constants SYMS="RDONLY NOSUID NODEV NOEXEC SYNCHRONOUS REMOUNT MANDLOCK \ DIRSYNC NOATIME NODIRATIME BIND MOVE REC VERBOSE SILENT \ POSIXACL UNBINDABLE PRIVATE SLAVE SHARED RELATIME KERNMOUNT \ I_VERSION STRICTATIME LAZYTIME SUBMOUNT NOREMOTELOCK NOSEC BORN \ ACTIVE NOUSER" SED_PROG= for i in $SYMS; do SED_PROG="$SED_PROG -e s/MS_$i/SB_$i/g"; done # we want files that contain at least one of MS_..., # with fs/namespace.c and fs/pnode.c excluded. L=$(for i in $SYMS; do git grep -w -l MS_$i $FILES; done| sort|uniq|grep -v '^fs/namespace.c'|grep -v '^fs/pnode.c') for f in $L; do sed -i $f $SED_PROG; done Requested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-10-10locking/rwsem, security/apparmor: Replace homebrew use of write_can_lock() with lockdepWill Deacon1-11/+0
The lockdep subsystem provides a robust way to assert that a lock is held, so use that instead of write_can_lock, which can give incorrect results for qrwlocks. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: John Johansen <john.johansen@canonical.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: paulmck@linux.vnet.ibm.com Link: http://lkml.kernel.org/r/1507055129-12300-1-git-send-email-will.deacon@arm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-06-10apparmor: move exec domain mediation to using labelsJohn Johansen1-1/+86
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10apparmor: share profile name on replacementJohn Johansen1-1/+31
The profile names are the same, leverage this. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-08apparmor: make internal lib fn skipn_spaces available to the rest of apparmorJohn Johansen1-0/+1
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-05-08mm: introduce kv[mz]alloc helpersMichal Hocko1-11/+0
Patch series "kvmalloc", v5. There are many open coded kmalloc with vmalloc fallback instances in the tree. Most of them are not careful enough or simply do not care about the underlying semantic of the kmalloc/page allocator which means that a) some vmalloc fallbacks are basically unreachable because the kmalloc part will keep retrying until it succeeds b) the page allocator can invoke a really disruptive steps like the OOM killer to move forward which doesn't sound appropriate when we consider that the vmalloc fallback is available. As it can be seen implementing kvmalloc requires quite an intimate knowledge if the page allocator and the memory reclaim internals which strongly suggests that a helper should be implemented in the memory subsystem proper. Most callers, I could find, have been converted to use the helper instead. This is patch 6. There are some more relying on __GFP_REPEAT in the networking stack which I have converted as well and Eric Dumazet was not opposed [2] to convert them as well. [1] http://lkml.kernel.org/r/20170130094940.13546-1-mhocko@kernel.org [2] http://lkml.kernel.org/r/1485273626.16328.301.camel@edumazet-glaptop3.roam.corp.google.com This patch (of 9): Using kmalloc with the vmalloc fallback for larger allocations is a common pattern in the kernel code. Yet we do not have any common helper for that and so users have invented their own helpers. Some of them are really creative when doing so. Let's just add kv[mz]alloc and make sure it is implemented properly. This implementation makes sure to not make a large memory pressure for > PAGE_SZE requests (__GFP_NORETRY) and also to not warn about allocation failures. This also rules out the OOM killer as the vmalloc is a more approapriate fallback than a disruptive user visible action. This patch also changes some existing users and removes helpers which are specific for them. In some cases this is not possible (e.g. ext4_kvmalloc, libcfs_kvzalloc) because those seems to be broken and require GFP_NO{FS,IO} context which is not vmalloc compatible in general (note that the page table allocation is GFP_KERNEL). Those need to be fixed separately. While we are at it, document that __vmalloc{_node} about unsupported gfp mask because there seems to be a lot of confusion out there. kvmalloc_node will warn about GFP_KERNEL incompatible (which are not superset) flags to catch new abusers. Existing ones would have to die slowly. [sfr@canb.auug.org.au: f2fs fixup] Link: http://lkml.kernel.org/r/20170320163735.332e64b7@canb.auug.org.au Link: http://lkml.kernel.org/r/20170306103032.2540-2-mhocko@kernel.org Signed-off-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Reviewed-by: Andreas Dilger <adilger@dilger.ca> [ext4 part] Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: John Hubbard <jhubbard@nvidia.com> Cc: David Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-04-07apparmor: fix parameters so that the permission test is bypassed at bootJohn Johansen1-1/+1
Boot parameters are written before apparmor is ready to answer whether the user is policy_view_capable(). Setting the parameters at boot results in an oops and failure to boot. Setting the parameters at boot is obviously allowed so skip the permission check when apparmor is not initialized. While we are at it move the more complicated check to last. Signed-off-by: John Johansen <john.johansen@canonical.com> Signed-off-by: James Morris <james.l.morris@oracle.com>
2017-02-21Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-securityLinus Torvalds1-0/+194
Pull security layer updates from James Morris: "Highlights: - major AppArmor update: policy namespaces & lots of fixes - add /sys/kernel/security/lsm node for easy detection of loaded LSMs - SELinux cgroupfs labeling support - SELinux context mounts on tmpfs, ramfs, devpts within user namespaces - improved TPM 2.0 support" * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (117 commits) tpm: declare tpm2_get_pcr_allocation() as static tpm: Fix expected number of response bytes of TPM1.2 PCR Extend tpm xen: drop unneeded chip variable tpm: fix misspelled "facilitate" in module parameter description tpm_tis: fix the error handling of init_tis() KEYS: Use memzero_explicit() for secret data KEYS: Fix an error code in request_master_key() sign-file: fix build error in sign-file.c with libressl selinux: allow changing labels for cgroupfs selinux: fix off-by-one in setprocattr tpm: silence an array overflow warning tpm: fix the type of owned field in cap_t tpm: add securityfs support for TPM 2.0 firmware event log tpm: enhance read_log_of() to support Physical TPM event log tpm: enhance TPM 2.0 PCR extend to support multiple banks tpm: implement TPM 2.0 capability to get active PCR banks tpm: fix RC value check in tpm2_seal_trusted tpm_tis: fix iTPM probe via probe_itpm() function tpm: Begin the process to deprecate user_read_timer tpm: remove tpm_read_index and tpm_write_index from tpm.h ...
2017-01-16apparmor: pass gfp param into aa_policy_init()John Johansen1-1/+1
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: constify policy name and hnameJohn Johansen1-2/+2
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: rename hname_tail to basenameJohn Johansen1-2/+2
Rename to the shorter and more familiar shell cmd name Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: rename mediated_filesystem() to path_mediated_fs()John Johansen1-1/+1
Rename to indicate the test is only about whether path mediation is used, not whether other types of mediation might be used. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: add debug assert AA_BUG and Kconfig to control debug infoJohn Johansen1-1/+13
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: add macro for bug asserts to check that a lock is heldJohn Johansen1-0/+11
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: add lib fn to find the "split" for fqnamesJohn Johansen1-0/+2
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: split out shared policy_XXX fns to libJohn Johansen1-0/+81
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: move lib definitions into separate lib includeJohn Johansen1-0/+94
Signed-off-by: John Johansen <john.johansen@canonical.com>
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