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Oz Shlomo a217313152 net/mlx5e: CT: manage the lifetime of the ct entry object 
The ct entry object is accessed by the ct add, del, stats and restore
methods. In addition, it is referenced from several hash tables.

The lifetime of the ct entry object was not managed which triggered race
conditions as in the following kasan dump:
[ 3374.973945] ==================================================================
[ 3374.988552] BUG: KASAN: use-after-free in memcmp+0x4c/0x98
[ 3374.999590] Read of size 1 at addr ffff00036129ea55 by task ksoftirqd/1/15
[ 3375.016415] CPU: 1 PID: 15 Comm: ksoftirqd/1 Tainted: G           O      5.4.31+ #1
[ 3375.055301] Call trace:
[ 3375.060214]  dump_backtrace+0x0/0x238
[ 3375.067580]  show_stack+0x24/0x30
[ 3375.074244]  dump_stack+0xe0/0x118
[ 3375.081085]  print_address_description.isra.9+0x74/0x3d0
[ 3375.091771]  __kasan_report+0x198/0x1e8
[ 3375.099486]  kasan_report+0xc/0x18
[ 3375.106324]  __asan_load1+0x60/0x68
[ 3375.113338]  memcmp+0x4c/0x98
[ 3375.119409]  mlx5e_tc_ct_restore_flow+0x3a4/0x6f8 [mlx5_core]
[ 3375.131073]  mlx5e_rep_tc_update_skb+0x1d4/0x2f0 [mlx5_core]
[ 3375.142553]  mlx5e_handle_rx_cqe_rep+0x198/0x308 [mlx5_core]
[ 3375.154034]  mlx5e_poll_rx_cq+0x2a0/0x1060 [mlx5_core]
[ 3375.164459]  mlx5e_napi_poll+0x1d4/0xa78 [mlx5_core]
[ 3375.174453]  net_rx_action+0x28c/0x7a8
[ 3375.182004]  __do_softirq+0x1b4/0x5d0

Manage the lifetime of the ct entry object by using synchornization
mechanisms for concurrent access.

Fixes: ac991b48d4 ("net/mlx5e: CT: Offload established flows")
Signed-off-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Oz Shlomo <ozsh@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
 		2021-02-11 18:50:15 -08:00
Documentation tcp: fix tcp_rmem documentation 2021-02-11 14:15:47 -08:00
LICENSES LICENSES: Add the CC-BY-4.0 license 2020-12-08 10:33:27 -07:00
arch cpufreq: ACPI: Update arch scale-invariance max perf ratio if CPPC is not there 2021-02-08 13:45:51 +01:00
block block-5.11-2021-02-05 2021-02-06 14:40:27 -08:00
certs .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
crypto X.509: Fix crash caused by NULL pointer 2021-01-20 11:33:51 -08:00
drivers net/mlx5e: CT: manage the lifetime of the ct entry object 2021-02-11 18:50:15 -08:00
fs nilfs2: make splice write available again 2021-02-10 11:19:58 -08:00
include net/sched: cls_flower: Reject invalid ct_state flags rules 2021-02-10 15:07:45 -08:00
init init/gcov: allow CONFIG_CONSTRUCTORS on UML to fix module gcov 2021-02-05 11:03:47 -08:00
ipc Merge branch 'akpm' (patches from Andrew) 2020-12-15 12:53:37 -08:00
kernel Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-02-10 11:33:39 -08:00
lib Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-02-10 11:33:39 -08:00
mm mm, slub: better heuristic for number of cpus when calculating slab order 2021-02-10 11:19:27 -08:00
net mptcp: add a missing retransmission timer scheduling 2021-02-11 18:30:55 -08:00
samples ARM: SoC drivers for v5.11 2020-12-16 16:38:41 -08:00
scripts kallsyms: fix nonconverging kallsyms table with lld 2021-02-05 17:53:28 +09:00
security cap: fix conversions on getxattr 2021-01-28 10:22:48 +01:00
sound ALSA: hda/via: Apply the workaround generically for Clevo machines 2021-01-26 18:05:03 +01:00
tools Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-02-10 11:33:39 -08:00
usr Merge branch 'work.fdpic' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-08-07 13:29:39 -07:00
virt KVM/arm64 fixes for 5.11, take #2 2021-01-25 18:52:01 -05:00
.clang-format clang-format: Update with the latest for_each macro list 2021-01-29 15:00:23 +01:00
.cocciconfig
…
.get_maintainer.ignore
…
.gitattributes
…
.gitignore .gitignore: docs: ignore sphinx_*/ directories 2020-09-10 10:44:31 -06:00
.mailmap MAINTAINERS: update Andrey Ryabinin's email address 2021-02-09 17:26:44 -08:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: dccp: move Gerrit Renker to CREDITS 2021-01-14 10:53:49 -08:00
Kbuild
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Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS MAINTAINERS: update Andrey Ryabinin's email address 2021-02-09 17:26:44 -08:00
Makefile Linux 5.11-rc7 2021-02-07 13:57:38 -08:00
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.