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| author | Eric Dumazet <edumazet@google.com> | 2018-11-08 17:34:27 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-23 08:17:05 +0100 |
| commit | 115973a608a1d99f8569496cb6f0f165be325f19 (patch) | |
| tree | 4152de80150cd7a19bba833ff2e98df63a52204b /include | |
| parent | 642e1d8a420907e526dc0cb351c66219cb174fee (diff) | |
inet: frags: better deal with smp races
[ Upstream commit 0d5b9311baf27bb545f187f12ecfd558220c607d ]
Multiple cpus might attempt to insert a new fragment in rhashtable,
if for example RPS is buggy, as reported by 배석진 in
https://patchwork.ozlabs.org/patch/994601/
We use rhashtable_lookup_get_insert_key() instead of
rhashtable_insert_fast() to let cpus losing the race
free their own inet_frag_queue and use the one that
was inserted by another cpu.
Fixes: 648700f76b03 ("inet: frags: use rhashtables for reassembly units")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: 배석진 <soukjin.bae@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions