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Fix a 112 byte leak for each IO request that is requeued while DM 

multipath is handling faults due to path failures.  This leak does not
 happen if blk-mq DM multipath is used.  It only occurs if .request_fn DM
 multipath is stacked ontop of blk-mq paths (e.g. scsi-mq devices).
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Merge tag 'dm-4.5-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

Pull device mapper fix from Mike Snitzer:
 "Fix a 112 byte leak for each IO request that is requeued while DM
  multipath is handling faults due to path failures.

  This leak does not happen if blk-mq DM multipath is used.  It only
  occurs if .request_fn DM multipath is stacked ontop of blk-mq paths
  (e.g. scsi-mq devices)"

* tag 'dm-4.5-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm: fix dm_rq_target_io leak on faults with .request_fn DM w/ blk-mq paths
This commit is contained in:
Linus Torvalds 2016-02-23 19:03:43 -08:00
parent 0ecdcd3a52 4328daa2e7
commit 84e54c46b2
1 changed files with 2 additions and 0 deletions
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2
drivers/md/dm.c
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@ -1191,6 +1191,8 @@ static void dm_unprep_request(struct request *rq)
if (clone)
free_rq_clone(clone);
else if (!tio->md->queue->mq_ops)
free_rq_tio(tio);
}
/*