tree 976189d6922588aeb05b91ad7ab2eccfec27dad4
parent 22d8b03ffbc05ec11c2d0b010b377ee0b3173300
author Pablo Neira Ayuso <pablo@netfilter.org> 1689837441 +0200
committer Oleksandr Tymoshenko <ovt@google.com> 1691552437 +0000

netfilter: nf_tables: skip bound chain on rule flush

[ Upstream commit 6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8 ]

Skip bound chain when flushing table rules, the rule that owns this
chain releases these objects.

Otherwise, the following warning is triggered:

  WARNING: CPU: 2 PID: 1217 at net/netfilter/nf_tables_api.c:2013 nf_tables_chain_destroy+0x1f7/0x210 [nf_tables]
  CPU: 2 PID: 1217 Comm: chain-flush Not tainted 6.1.39 #1
  RIP: 0010:nf_tables_chain_destroy+0x1f7/0x210 [nf_tables]

BUG=b/294893046
TEST=presubmit
RELEASE_NOTE=Fixed CVE-2023-3777 in the Linux kernel.

Fixes: d0e2c7de92c7 ("netfilter: nf_tables: add NFT_CHAIN_BINDING")
Reported-by: Kevin Rich <kevinrich1337@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Change-Id: I31a31cc2a785e489b72574cbd6ca2ddb2b8e0281
Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/54107
Reviewed-by: Arnav Kansal <rnv@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>