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| author | NeilBrown <neilb@suse.de> | 2012-10-11 13:50:12 +1100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2012-10-11 13:50:12 +1100 |
| commit | 143c4d0573caebe0ae017097614349697e2280eb (patch) | |
| tree | b5a68ce2a375a8e2617d2f4099b1701b521ddcc8 /drivers | |
| parent | 9e44476851e91c86c98eb92b9bc27fb801f89072 (diff) | |
| download | linux-143c4d0573caebe0ae017097614349697e2280eb.tar.gz linux-143c4d0573caebe0ae017097614349697e2280eb.tar.bz2 linux-143c4d0573caebe0ae017097614349697e2280eb.zip | |
md/raid5: add some missing locking in handle_failed_stripe.
We really should hold the stripe_lock while accessing
'toread' else we could race with add_stripe_bio and corrupt
a list.
Reported-by: "Jianpeng Ma" <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/raid5.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 758b77296404..36c0a158730b 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -2552,8 +2552,10 @@ handle_failed_stripe(struct r5conf *conf, struct stripe_head *sh, if (!test_bit(R5_Wantfill, &sh->dev[i].flags) && (!test_bit(R5_Insync, &sh->dev[i].flags) || test_bit(R5_ReadError, &sh->dev[i].flags))) { + spin_lock_irq(&sh->stripe_lock); bi = sh->dev[i].toread; sh->dev[i].toread = NULL; + spin_unlock_irq(&sh->stripe_lock); if (test_and_clear_bit(R5_Overlap, &sh->dev[i].flags)) wake_up(&conf->wait_for_overlap); if (bi) s->to_read--; |