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Description of problem: No sure how real this issue is - but with lvm2 test suite run we kmemleak couple of this elements per each run. unreferenced object 0xffff8bbcbad71f00 (size 256): comm "kworker/u4:2", pid 5875, jiffies 4298404175 (age 413.812s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff8b9471ca>] kmemleak_alloc+0x4a/0xa0 [<ffffffff8b28be2e>] kmem_cache_alloc+0x14e/0x2e0 [<ffffffff8b21529d>] mempool_alloc_slab+0x1d/0x30 [<ffffffff8b215019>] mempool_alloc+0x79/0x1e0 [<ffffffff8b4572e7>] bio_alloc_bioset+0xa7/0x270 [<ffffffffc02ec48a>] process_prepared_discard_passdown_pt1+0x7a/0x180 [dm_thin_pool] [<ffffffffc02eb38c>] process_discard_cell_passdown+0x15c/0x1e0 [dm_thin_pool] [<ffffffffc02e9821>] process_discard_bio+0xc1/0xf0 [dm_thin_pool] [<ffffffffc02ee7a1>] do_worker+0x781/0x900 [dm_thin_pool] [<ffffffff8b0d4d80>] process_one_work+0x260/0x750 [<ffffffff8b0d52be>] worker_thread+0x4e/0x4a0 [<ffffffff8b0dcacc>] kthread+0x12c/0x150 [<ffffffff8b956fc1>] ret_from_fork+0x31/0x40 [<ffffffffffffffff>] 0xffffffffffffffff Version-Release number of selected component (if applicable): Kernel 4.10-rc6 How reproducible: Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info:
Patch suggested with: https://www.redhat.com/archives/dm-devel/2017-April/msg00286.html (with full headers) -- drivers/md/dm-thin.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c index 2b266a2..5742e5e 100644 --- a/drivers/md/dm-thin.c +++ b/drivers/md/dm-thin.c @@ -1069,6 +1069,7 @@ static void passdown_endio(struct bio *bio) * to unmap (we ignore err). */ queue_passdown_pt2(bio->bi_private); + bio_put(bio); }