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2020-07-24net: openvswitch: fixes potential deadlock in dp cleanup codeEelco Chaudron2-14/+13
The previous patch introduced a deadlock, this patch fixes it by making sure the work is canceled without holding the global ovs lock. This is done by moving the reorder processing one layer up to the netns level. Fixes: eac87c413bf9 ("net: openvswitch: reorder masks array based on usage") Reported-by: syzbot+2c4ff3614695f75ce26c@syzkaller.appspotmail.com Reported-by: syzbot+bad6507e5db05017b008@syzkaller.appspotmail.com Reviewed-by: Paolo <pabeni@redhat.com> Signed-off-by: Eelco Chaudron <echaudro@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24sctp: fix slab-out-of-bounds in SCTP_DELAYED_SACK processingChristoph Hellwig1-21/+29
This sockopt accepts two kinds of parameters, using struct sctp_sack_info and struct sctp_assoc_value. The mentioned commit didn't notice an implicit cast from the smaller (latter) struct to the bigger one (former) when copying the data from the user space, which now leads to an attempt to write beyond the buffer (because it assumes the storing buffer is bigger than the parameter itself). Fix it by allocating a sctp_sack_info on stack and filling it out based on the small struct for the compat case. Changelog stole from an earlier patch from Marcelo Ricardo Leitner. Fixes: ebb25defdc17 ("sctp: pass a kernel pointer to sctp_setsockopt_delayed_ack") Reported-by: syzbot+0e4699d000d8b874d8dc@syzkaller.appspotmail.com Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24mISDN: Don't try to print a sockptr_t from debug logging code.David S. Miller1-2/+2
drivers/isdn/mISDN/socket.c: In function ‘data_sock_setsockopt’: ./include/linux/kern_levels.h:5:18: warning: format ‘%p’ expects argument of type ‘void *’, but argument 6 has type ‘sockptr_t’ [-Wformat=] 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ ./include/linux/kern_levels.h:15:20: note: in expansion of macro ‘KERN_SOH’ 15 | #define KERN_DEBUG KERN_SOH "7" /* debug-level messages */ | ^~~~~~~~ drivers/isdn/mISDN/socket.c:410:10: note: in expansion of macro ‘KERN_DEBUG’ 410 | printk(KERN_DEBUG "%s(%p, %d, %x, %p, %d)\n", __func__, sock, | ^~~~~~~~~~ drivers/isdn/mISDN/socket.c:410:38: note: format string is defined here 410 | printk(KERN_DEBUG "%s(%p, %d, %x, %p, %d)\n", __func__, sock, | ~^ | | | void * Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24net: optimize the sockptr_t for unified kernel/user address spacesChristoph Hellwig3-9/+43
For architectures like x86 and arm64 we don't need the separate bit to indicate that a pointer is a kernel pointer as the address spaces are unified. That way the sockptr_t can be reduced to a union of two pointers, which leads to nicer calling conventions. The only caveat is that we need to check that users don't pass in kernel address and thus gain access to kernel memory. Thus the USER_SOCKPTR helper is replaced with a init_user_sockptr function that does this check and returns an error if it fails. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24net: pass a sockptr_t into ->setsockoptChristoph Hellwig61-258/+246
Rework the remaining setsockopt code to pass a sockptr_t instead of a plain user pointer. This removes the last remaining set_fs(KERNEL_DS) outside of architecture specific code. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Stefan Schmidt <stefan@datenfreihafen.org> [ieee802154] Acked-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24net/tcp: switch do_tcp_setsockopt to sockptr_tChristoph Hellwig1-18/+16
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24net/tcp: switch ->md5_parse to sockptr_tChristoph Hellwig4-6/+7
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24net/udp: switch udp_lib_setsockopt to sockptr_tChristoph Hellwig3-5/+7
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24net/ipv6: switch do_ipv6_setsockopt to sockptr_tChristoph Hellwig1-33/+33
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24net/ipv6: factor out a ipv6_set_opt_hdr helperChristoph Hellwig1-75/+75
Factour out a helper to set the IPv6 option headers from do_ipv6_setsockopt. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24net/ipv6: switch ipv6_flowlabel_opt to sockptr_tChristoph Hellwig3-9/+11
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Note that the get case is pretty weird in that it actually copies data back to userspace from setsockopt. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24net/ipv6: split up ipv6_flowlabel_optChristoph Hellwig1-143/+166
Split ipv6_flowlabel_opt into a subfunction for each action and a small wrapper. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24net/ipv6: switch ip6_mroute_setsockopt to sockptr_tChristoph Hellwig3-13/+15
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24net/ipv4: switch do_ip_setsockopt to sockptr_tChristoph Hellwig1-35/+33
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24net/ipv4: merge ip_options_get and ip_options_get_from_userChristoph Hellwig3-38/+17
Use the sockptr_t type to merge the versions. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24net/ipv4: switch ip_mroute_setsockopt to sockptr_tChristoph Hellwig3-10/+12
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24bpfilter: switch bpfilter_ip_set_sockopt to sockptr_tChristoph Hellwig4-11/+12
This is mostly to prepare for cleaning up the callers, as bpfilter by design can't handle kernel pointers. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24netfilter: switch nf_setsockopt to sockptr_tChristoph Hellwig10-66/+68
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24netfilter: switch xt_copy_counters to sockptr_tChristoph Hellwig5-23/+21
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24netfilter: remove the unused user argument to do_update_countersChristoph Hellwig1-5/+4
Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24net/xfrm: switch xfrm_user_policy to sockptr_tChristoph Hellwig4-8/+12
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24net: switch sock_set_timeout to sockptr_tChristoph Hellwig4-18/+20
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24net: switch sock_set_timeout to sockptr_tChristoph Hellwig1-6/+9
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24net: switch sock_setbindtodevice to sockptr_tChristoph Hellwig1-4/+3
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-24net: switch copy_bpf_fprog_from_user to sockptr_tChristoph Hellwig4-8/+11
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>