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(parent: 6c015bf) | patch
Input: mousedev - add a schedule point in mousedev_write()
authorEric Dumazet <edumazet@google.com>
Fri, 5 Oct 2018 00:41:37 +0000 (17:41 -0700)
committerDmitry Torokhov <dmitry.torokhov@gmail.com>
Fri, 5 Oct 2018 00:42:26 +0000 (17:42 -0700)
commitf8464284b7f0913f71c2fc3ab44618572de98218
treef33df632923f8e573967ea1e68106bc74a29f55ctree | snapshot
parent6c015bf40818bad3811c9bd70c208bd3fa1e8ee4commit | diff
Input: mousedev - add a schedule point in mousedev_write()

syzbot was able to trigger rcu stalls by calling write()
with large number of bytes.

Add a cond_resched() in the loop to avoid this.

Link: https://lkml.org/lkml/2018/8/23/1106
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot+9436b02171ac0894d33e@syzkaller.appspotmail.com
Reviewed-by: Paul E. McKenney <paulmck@linux.ibm.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
drivers/input/mousedev.c diff | blob | history
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