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author | Qian Cai <cai@lca.pw> | 2020-03-25 17:31:42 +0300 |
---|---|---|
committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2020-03-27 20:42:20 +0300 |
commit | 0a6a9515fe390976cd762c52d8d4f446d7a14285 (patch) | |
tree | 747af8ed14c5fa62034bae91cedcdcc8dab0d8a6 /net/netfilter/nf_flow_table_core.c | |
parent | 133a2fe594dc0eb15a77477a5a05176495190139 (diff) | |
download | linux-0a6a9515fe390976cd762c52d8d4f446d7a14285.tar.xz |
netfilter: nf_tables: silence a RCU-list warning in nft_table_lookup()
It is safe to traverse &net->nft.tables with &net->nft.commit_mutex
held using list_for_each_entry_rcu(). Silence the PROVE_RCU_LIST false
positive,
WARNING: suspicious RCU usage
net/netfilter/nf_tables_api.c:523 RCU-list traversed in non-reader section!!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 1
1 lock held by iptables/1384:
#0: ffffffff9745c4a8 (&net->nft.commit_mutex){+.+.}, at: nf_tables_valid_genid+0x25/0x60 [nf_tables]
Call Trace:
dump_stack+0xa1/0xea
lockdep_rcu_suspicious+0x103/0x10d
nft_table_lookup.part.0+0x116/0x120 [nf_tables]
nf_tables_newtable+0x12c/0x7d0 [nf_tables]
nfnetlink_rcv_batch+0x559/0x1190 [nfnetlink]
nfnetlink_rcv+0x1da/0x210 [nfnetlink]
netlink_unicast+0x306/0x460
netlink_sendmsg+0x44b/0x770
____sys_sendmsg+0x46b/0x4a0
___sys_sendmsg+0x138/0x1a0
__sys_sendmsg+0xb6/0x130
__x64_sys_sendmsg+0x48/0x50
do_syscall_64+0x69/0xf4
entry_SYSCALL_64_after_hwframe+0x49/0xb3
Signed-off-by: Qian Cai <cai@lca.pw>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/nf_flow_table_core.c')
0 files changed, 0 insertions, 0 deletions