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author | Ziyang Xuan <william.xuanziyang@huawei.com> | 2024-04-03 15:22:04 +0800 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-13 12:50:12 +0200 |
commit | 69d1fe14a680042ec913f22196b58e2c8ff1b007 (patch) | |
tree | 2d8bd9b90681fa4d54fa3da36cf6dd34dbe8531d /fs/jfs/symlink.c | |
parent | c82a659cc8bb7a7f8a8348fc7f203c412ae3636f (diff) | |
download | linux-stable-69d1fe14a680042ec913f22196b58e2c8ff1b007.tar.gz linux-stable-69d1fe14a680042ec913f22196b58e2c8ff1b007.tar.bz2 linux-stable-69d1fe14a680042ec913f22196b58e2c8ff1b007.zip |
netfilter: nf_tables: Fix potential data-race in __nft_flowtable_type_get()
commit 24225011d81b471acc0e1e315b7d9905459a6304 upstream.
nft_unregister_flowtable_type() within nf_flow_inet_module_exit() can
concurrent with __nft_flowtable_type_get() within nf_tables_newflowtable().
And thhere is not any protection when iterate over nf_tables_flowtables
list in __nft_flowtable_type_get(). Therefore, there is pertential
data-race of nf_tables_flowtables list entry.
Use list_for_each_entry_rcu() to iterate over nf_tables_flowtables list
in __nft_flowtable_type_get(), and use rcu_read_lock() in the caller
nft_flowtable_type_get() to protect the entire type query process.
Fixes: 3b49e2e94e6e ("netfilter: nf_tables: add flow table netlink frontend")
Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/jfs/symlink.c')
0 files changed, 0 insertions, 0 deletions