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| author | NeilBrown <neilb@suse.de> | 2014-01-14 10:38:09 +1100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2014-01-14 16:44:07 +1100 |
| commit | b50c259e25d9260b9108dc0c2964c26e5ecbe1c1 (patch) | |
| tree | 146cf33b0f029effcf8c9c413627558979093ce7 /drivers | |
| parent | 1cc03eb93245e63b0b7a7832165efdc52e25b4e6 (diff) | |
| download | linux-b50c259e25d9260b9108dc0c2964c26e5ecbe1c1.tar.gz linux-b50c259e25d9260b9108dc0c2964c26e5ecbe1c1.tar.bz2 linux-b50c259e25d9260b9108dc0c2964c26e5ecbe1c1.zip | |
md/raid10: fix two bugs in handling of known-bad-blocks.
If we discover a bad block when reading we split the request and
potentially read some of it from a different device.
The code path of this has two bugs in RAID10.
1/ we get a spin_lock with _irq, but unlock without _irq!!
2/ The calculation of 'sectors_handled' is wrong, as can be clearly
seen by comparison with raid1.c
This leads to at least 2 warnings and a probable crash is a RAID10
ever had known bad blocks.
Cc: stable@vger.kernel.org (v3.1+)
Fixes: 856e08e23762dfb92ffc68fd0a8d228f9e152160
Reported-by: Damian Nowak <spam@nowaker.net>
URL: https://bugzilla.kernel.org/show_bug.cgi?id=68181
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/raid10.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index c504e8389e69..65285211568f 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -1319,7 +1319,7 @@ read_again: /* Could not read all from this device, so we will * need another r10_bio. */ - sectors_handled = (r10_bio->sectors + max_sectors + sectors_handled = (r10_bio->sector + max_sectors - bio->bi_sector); r10_bio->sectors = max_sectors; spin_lock_irq(&conf->device_lock); @@ -1327,7 +1327,7 @@ read_again: bio->bi_phys_segments = 2; else bio->bi_phys_segments++; - spin_unlock(&conf->device_lock); + spin_unlock_irq(&conf->device_lock); /* Cannot call generic_make_request directly * as that will be queued in __generic_make_request * and subsequent mempool_alloc might block |