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4328daa2e7
Using request-based DM mpath configured with the following stacking
(.request_fn DM mpath ontop of scsi-mq paths):
echo Y > /sys/module/scsi_mod/parameters/use_blk_mq
echo N > /sys/module/dm_mod/parameters/use_blk_mq
'struct dm_rq_target_io' would leak if a request is requeued before a
blk-mq clone is allocated (or fails to allocate). free_rq_tio()
wasn't being called.
kmemleak reported:
unreferenced object 0xffff8800b90b98c0 (size 112):
comm "kworker/7:1H", pid 5692, jiffies 4295056109 (age 78.589s)
hex dump (first 32 bytes):
00 d0 5c 2c 03 88 ff ff 40 00 bf 01 00 c9 ff ff ..\,....@.......
e0 d9 b1 34 00 88 ff ff 00 00 00 00 00 00 00 00 ...4............
backtrace:
[<ffffffff81672b6e>] kmemleak_alloc+0x4e/0xb0
[<ffffffff811dbb63>] kmem_cache_alloc+0xc3/0x1e0
[<ffffffff8117eae5>] mempool_alloc_slab+0x15/0x20
[<ffffffff8117ec1e>] mempool_alloc+0x6e/0x170
[<ffffffffa00029ac>] dm_old_prep_fn+0x3c/0x180 [dm_mod]
[<ffffffff812fbd78>] blk_peek_request+0x168/0x290
[<ffffffffa0003e62>] dm_request_fn+0xb2/0x1b0 [dm_mod]
[<ffffffff812f66e3>] __blk_run_queue+0x33/0x40
[<ffffffff812f9585>] blk_delay_work+0x25/0x40
[<ffffffff81096fff>] process_one_work+0x14f/0x3d0
[<ffffffff81097715>] worker_thread+0x125/0x4b0
[<ffffffff8109ce88>] kthread+0xd8/0xf0
[<ffffffff8167cb8f>] ret_from_fork+0x3f/0x70
[<ffffffffffffffff>] 0xffffffffffffffff
crash> struct -o dm_rq_target_io
struct dm_rq_target_io {
...
}
SIZE: 112
Fixes:
|
||
|---|---|---|
| .. | ||
| bcache | ||
| persistent-data | ||
| bitmap.c | ||
| bitmap.h | ||
| dm-bio-prison.c | ||
| dm-bio-prison.h | ||
| dm-bio-record.h | ||
| dm-bufio.c | ||
| dm-bufio.h | ||
| dm-builtin.c | ||
| dm-cache-block-types.h | ||
| dm-cache-metadata.c | ||
| dm-cache-metadata.h | ||
| dm-cache-policy-cleaner.c | ||
| dm-cache-policy-internal.h | ||
| dm-cache-policy-mq.c | ||
| dm-cache-policy-smq.c | ||
| dm-cache-policy.c | ||
| dm-cache-policy.h | ||
| dm-cache-target.c | ||
| dm-crypt.c | ||
| dm-delay.c | ||
| dm-era-target.c | ||
| dm-exception-store.c | ||
| dm-exception-store.h | ||
| dm-flakey.c | ||
| dm-io.c | ||
| dm-ioctl.c | ||
| dm-kcopyd.c | ||
| dm-linear.c | ||
| dm-log-userspace-base.c | ||
| dm-log-userspace-transfer.c | ||
| dm-log-userspace-transfer.h | ||
| dm-log-writes.c | ||
| dm-log.c | ||
| dm-mpath.c | ||
| dm-mpath.h | ||
| dm-path-selector.c | ||
| dm-path-selector.h | ||
| dm-queue-length.c | ||
| dm-raid1.c | ||
| dm-raid.c | ||
| dm-region-hash.c | ||
| dm-round-robin.c | ||
| dm-service-time.c | ||
| dm-snap-persistent.c | ||
| dm-snap-transient.c | ||
| dm-snap.c | ||
| dm-stats.c | ||
| dm-stats.h | ||
| dm-stripe.c | ||
| dm-switch.c | ||
| dm-sysfs.c | ||
| dm-table.c | ||
| dm-target.c | ||
| dm-thin-metadata.c | ||
| dm-thin-metadata.h | ||
| dm-thin.c | ||
| dm-uevent.c | ||
| dm-uevent.h | ||
| dm-verity-fec.c | ||
| dm-verity-fec.h | ||
| dm-verity-target.c | ||
| dm-verity.h | ||
| dm-zero.c | ||
| dm.c | ||
| dm.h | ||
| faulty.c | ||
| Kconfig | ||
| linear.c | ||
| linear.h | ||
| Makefile | ||
| md-cluster.c | ||
| md-cluster.h | ||
| md.c | ||
| md.h | ||
| multipath.c | ||
| multipath.h | ||
| raid0.c | ||
| raid0.h | ||
| raid1.c | ||
| raid1.h | ||
| raid5-cache.c | ||
| raid5.c | ||
| raid5.h | ||
| raid10.c | ||
| raid10.h | ||