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| author |   Daniel Jordan <daniel.m.jordan@oracle.com> | 2020-06-08 17:26:52 -0400 |
|---|---|---|
| committer |   Herbert Xu <herbert@gondor.apana.org.au> | 2020-06-18 17:09:54 +1000 |
| commit | e04ec0de61c1eb9693179093e83ab8ca68a30d08 (patch) | |
| tree | c9659db2092a276ee7a64922be0c57e0526f4c07 /scripts | |
| parent | crypto: af_alg - fix use-after-free in af_alg_accept() due to bh_lock_sock() (diff) | |
| download | wireguard-linux-e04ec0de61c1eb9693179093e83ab8ca68a30d08.tar.xz wireguard-linux-e04ec0de61c1eb9693179093e83ab8ca68a30d08.zip | |
padata: upgrade smp_mb__after_atomic to smp_mb in padata_do_serial
A 5.7 kernel hangs during a tcrypt test of padata that waits for an AEAD
request to finish. This is only seen on large machines running many
concurrent requests.
The issue is that padata never serializes the request. The removal of
the reorder_objects atomic missed that the memory barrier in
padata_do_serial() depends on it.
Upgrade the barrier from smp_mb__after_atomic to smp_mb to get correct
ordering again.
Fixes: 3facced7aeed1 ("padata: remove reorder_objects")
Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: linux-kernel@vger.kernel.org
Cc: <stable@vger.kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions