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authorNeilBrown <neilb@suse.de>2014-08-18 13:56:38 +1000
committerNeilBrown <neilb@suse.de>2014-08-19 17:20:27 +1000
commitce0b0a46955d1bb389684a2605dbcaa990ba0154 (patch)
tree70f9d9eeecb0cb9eb4fa69b2d161a2ab72c7e5e4 /drivers/md/raid10.c
parent9c4bdf697c39805078392d5ddbbba5ae5680e0dd (diff)
md/raid10: fix memory leak when reshaping a RAID10.
raid10 reshape clears unwanted bits from a bio->bi_flags using a method which, while clumsy, worked until 3.10 when BIO_OWNS_VEC was added. Since then it clears that bit but shouldn't. This results in a memory leak. So change to used the approved method of clearing unwanted bits. As this causes a memory leak which can consume all of memory the fix is suitable for -stable. Fixes: a38352e0ac02dbbd4fa464dc22d1352b5fbd06fd Cc: stable@vger.kernel.org (v3.10+) Reported-by: mdraid.pkoch@dfgh.net (Peter Koch) Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/raid10.c')
-rw-r--r--drivers/md/raid10.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index b08c1887132..d9073a10f2f 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -4410,7 +4410,7 @@ read_more:
read_bio->bi_private = r10_bio;
read_bio->bi_end_io = end_sync_read;
read_bio->bi_rw = READ;
- read_bio->bi_flags &= ~(BIO_POOL_MASK - 1);
+ read_bio->bi_flags &= (~0UL << BIO_RESET_BITS);
read_bio->bi_flags |= 1 << BIO_UPTODATE;
read_bio->bi_vcnt = 0;
read_bio->bi_iter.bi_size = 0;