crypto: cryptd - disable softirqs in cryptd_queue_worker to prevent data corruption
authorJussi Kivilinna <jussi.kivilinna@mbnet.fi>
Sun, 21 Oct 2012 17:42:28 +0000 (20:42 +0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 26 Nov 2012 19:37:41 +0000 (11:37 -0800)
commit30966dbf8217223b017514ca684c633e5c31a13a
tree1b983a3d55a066a1bb946a398d769156097f053d
parentbb60c07c75a9087303779324be4e5de771a7687b
crypto: cryptd - disable softirqs in cryptd_queue_worker to prevent data corruption

commit 9efade1b3e981f5064f9db9ca971b4dc7557ae42 upstream.

cryptd_queue_worker attempts to prevent simultaneous accesses to crypto
workqueue by cryptd_enqueue_request using preempt_disable/preempt_enable.
However cryptd_enqueue_request might be called from softirq context,
so add local_bh_disable/local_bh_enable to prevent data corruption and
panics.

Bug report at http://marc.info/?l=linux-crypto-vger&m=134858649616319&w=2

v2:
 - Disable software interrupts instead of hardware interrupts

Reported-by: Gurucharan Shetty <gurucharan.shetty@gmail.com>
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
crypto/cryptd.c