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Nikolay Aleksandrov 58e2071742 net: bridge: fix vlan tunnel dst null pointer dereference 
This patch fixes a tunnel_dst null pointer dereference due to lockless
access in the tunnel egress path. When deleting a vlan tunnel the
tunnel_dst pointer is set to NULL without waiting a grace period (i.e.
while it's still usable) and packets egressing are dereferencing it
without checking. Use READ/WRITE_ONCE to annotate the lockless use of
tunnel_id, use RCU for accessing tunnel_dst and make sure it is read
only once and checked in the egress path. The dst is already properly RCU
protected so we don't need to do anything fancy than to make sure
tunnel_id and tunnel_dst are read only once and checked in the egress path.

Cc: stable@vger.kernel.org
Fixes: 11538d039a ("bridge: vlan dst_metadata hooks in ingress and egress paths")
Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-10 14:06:43 -07:00
arch Networking fixes for 5.13-rc4, including fixes from bpf, netfilter, 2021-05-26 17:44:49 -10:00
block block-5.13-2021-05-22 2021-05-22 07:40:34 -10:00
certs
crypto
Documentation Networking fixes for 5.13-rc4, including fixes from bpf, netfilter, 2021-05-26 17:44:49 -10:00
drivers mlx5-fixes-2021-06-09 2021-06-10 13:38:46 -07:00
fs proc: Check /proc/$pid/attr/ writes against file opener 2021-05-25 10:24:41 -10:00
include net/mlx5e: Fix page reclaim for dead peer hairpin 2021-06-09 17:20:03 -07:00
init
ipc ipc/mqueue, msg, sem: avoid relying on a stack reference past its expiry 2021-05-22 15:09:07 -10:00
kernel bpf, lockdown, audit: Fix buggy SELinux lockdown permission checks 2021-06-02 21:59:22 +02:00
lib lib: kunit: suppress a compilation warning of frame size 2021-05-22 15:09:07 -10:00
LICENSES
mm userfaultfd: hugetlbfs: fix new flag usage in error path 2021-05-22 15:09:07 -10:00
net net: bridge: fix vlan tunnel dst null pointer dereference 2021-06-10 14:06:43 -07:00
samples
scripts kbuild: Quote OBJCOPY var to avoid a pahole call break the build 2021-05-27 11:32:56 -07:00
security
sound
tools wireguard: selftests: make sure rp_filter is disabled on vethc 2021-06-04 14:25:14 -07:00
usr
virt
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MAINTAINERS MAINTAINERS: nfc mailing lists are subscribers-only 2021-06-01 17:09:28 -07:00
Makefile Linux 5.13-rc3 2021-05-23 11:42:48 -10:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.