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| author | Maik Hampel <m.hampel@gmx.de> | 2007-07-31 00:37:57 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-31 15:39:38 -0700 |
| commit | 14e713446aaca97dbe590fe845f7dcbd74ddbee2 (patch) | |
| tree | 530c21e7a5c7fa890193765f235dd9360fc54eed | |
| parent | bfe0d6867e36f46836d2c3755fa8b9ef8cf143ba (diff) | |
| download | linux-14e713446aaca97dbe590fe845f7dcbd74ddbee2.tar.gz linux-14e713446aaca97dbe590fe845f7dcbd74ddbee2.tar.bz2 linux-14e713446aaca97dbe590fe845f7dcbd74ddbee2.zip | |
md: raid10: fix use-after-free of bio
In case of read errors raid10d tries to print a nice error message,
unfortunately using data from an already put bio.
Signed-off-by: Maik Hampel <m.hampel@gmx.de>
Acked-By: NeilBrown <neilb@suse.de>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/md/raid10.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index f730a144baf1..0c97bf4f686e 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -1557,7 +1557,6 @@ static void raid10d(mddev_t *mddev) bio = r10_bio->devs[r10_bio->read_slot].bio; r10_bio->devs[r10_bio->read_slot].bio = mddev->ro ? IO_BLOCKED : NULL; - bio_put(bio); mirror = read_balance(conf, r10_bio); if (mirror == -1) { printk(KERN_ALERT "raid10: %s: unrecoverable I/O" @@ -1565,8 +1564,10 @@ static void raid10d(mddev_t *mddev) bdevname(bio->bi_bdev,b), (unsigned long long)r10_bio->sector); raid_end_bio_io(r10_bio); + bio_put(bio); } else { const int do_sync = bio_sync(r10_bio->master_bio); + bio_put(bio); rdev = conf->mirrors[mirror].rdev; if (printk_ratelimit()) printk(KERN_ERR "raid10: %s: redirecting sector %llu to" |