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(parent: 8e8118f) | patch
netfilter: nft_numgen: fix race between num generate and store it
authorLiping Zhang <liping.zhang@spreadtrum.com>
Mon, 12 Sep 2016 14:21:36 +0000 (22:21 +0800)
committerPablo Neira Ayuso <pablo@netfilter.org>
Mon, 12 Sep 2016 18:00:23 +0000 (20:00 +0200)
commit2e917d602acd9e3e8c6e4c43b213c8929d986503
tree1d7ffcad09e03541892e6eb11fb150f30208a323tree | snapshot
parent8e8118f893138d4cc3d4dbf4163d7497fca54a9dcommit | diff
netfilter: nft_numgen: fix race between num generate and store it

After we generate a new number, we still use the priv->counter and
store it to the dreg. This is not correct, another cpu may already
change it to a new number. So we must use the generated number, not
the priv->counter itself.

Fixes: 91dbc6be0a62 ("netfilter: nf_tables: add number generator expression")
Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
net/netfilter/nft_numgen.c diff | blob | history
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