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xfs: Fix leak of discard bio 

The bio describing discard operation is allocated by
__blkdev_issue_discard() which returns us a reference to it. That
reference is never released and thus we leak this bio. Drop the bio
reference once it completes in xlog_discard_endio().

CC: stable@vger.kernel.org
Fixes: 4560e78f40
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Jan Kara 2017-08-02 12:37:16 -07:00 committed by Darrick J. Wong
parent 5b094d6dac
commit ea7bd56fa3
1 changed files with 1 additions and 0 deletions
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fs/xfs/xfs_log_cil.c
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@ -539,6 +539,7 @@ xlog_discard_endio(
INIT_WORK(&ctx->discard_endio_work, xlog_discard_endio_work);
queue_work(xfs_discard_wq, &ctx->discard_endio_work);
bio_put(bio);
}
static void