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| author | Ziyang Xuan <william.xuanziyang@huawei.com> | 2024-04-07 14:56:04 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-02 16:17:09 +0200 |
| commit | 939109c0a8e2a006a6cc8209e262d25065f4403a (patch) | |
| tree | d4fff0f8f0ca6e8362db31da95d2b0f4b0378e03 /kernel/smpboot.c | |
| parent | 97f097a8091261ffa07c8889550c4026e59b6c14 (diff) | |
| download | linux-stable-939109c0a8e2a006a6cc8209e262d25065f4403a.tar.gz linux-stable-939109c0a8e2a006a6cc8209e262d25065f4403a.tar.bz2 linux-stable-939109c0a8e2a006a6cc8209e262d25065f4403a.zip | |
netfilter: nf_tables: Fix potential data-race in __nft_expr_type_get()
[ Upstream commit f969eb84ce482331a991079ab7a5c4dc3b7f89bf ]
nft_unregister_expr() can concurrent with __nft_expr_type_get(),
and there is not any protection when iterate over nf_tables_expressions
list in __nft_expr_type_get(). Therefore, there is potential data-race
of nf_tables_expressions list entry.
Use list_for_each_entry_rcu() to iterate over nf_tables_expressions
list in __nft_expr_type_get(), and use rcu_read_lock() in the caller
nft_expr_type_get() to protect the entire type query process.
Fixes: ef1f7df9170d ("netfilter: nf_tables: expression ops overloading")
Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'kernel/smpboot.c')
0 files changed, 0 insertions, 0 deletions