This is a note to let you know that I've just added the patch titled xfs: Fix leak of discard bio to the 4.12-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: xfs-fix-leak-of-discard-bio.patch and it can be found in the queue-4.12 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From ea7bd56fa309d10a41b1041827a63c0746c47554 Mon Sep 17 00:00:00 2001 From: Jan Kara <jack@xxxxxxx> Date: Wed, 2 Aug 2017 12:37:16 -0700 Subject: xfs: Fix leak of discard bio From: Jan Kara <jack@xxxxxxx> commit ea7bd56fa309d10a41b1041827a63c0746c47554 upstream. 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(). Fixes: 4560e78f40cb55bd2ea8f1ef4001c5baa88531c7 Signed-off-by: Jan Kara <jack@xxxxxxx> Reviewed-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/xfs/xfs_log_cil.c | 1 + 1 file changed, 1 insertion(+) --- a/fs/xfs/xfs_log_cil.c +++ b/fs/xfs/xfs_log_cil.c @@ -519,6 +519,7 @@ 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 Patches currently in stable-queue which might be from jack@xxxxxxx are queue-4.12/xfs-fix-leak-of-discard-bio.patch