BUG: memory leak unreferenced object 0xffff8800a7650a00 (size 256): comm "ext4lazyinit", pid 4278, jiffies 4294948591 (age 81.190s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 40 94 00 1b 02 88 ff ff ........@....... 02 00 00 f0 00 00 00 00 11 02 00 00 00 00 00 00 ................ backtrace: [] kmemleak_alloc+0x23/0x40 mm/kmemleak.c:913 [] kmemleak_alloc_recursive include/linux/kmemleak.h:47 [inline] [] slab_post_alloc_hook mm/slab.h:406 [inline] [] slab_alloc mm/slab.c:3447 [inline] [] kmem_cache_alloc+0x177/0x270 mm/slab.c:3607 [] mempool_alloc_slab+0x10/0x20 mm/mempool.c:465 [] mempool_alloc+0x60/0x150 mm/mempool.c:344 [] bio_alloc_bioset+0xb5/0x220 block/bio.c:469 [] bio_alloc include/linux/bio.h:446 [inline] [] next_bio+0x1f/0x50 block/blk-lib.c:15 [] blkdev_issue_write_same+0x51/0x110 block/blk-lib.c:150 [] blkdev_issue_zeroout+0x9d/0x1d0 block/blk-lib.c:245 [] sb_issue_zeroout include/linux/blkdev.h:1148 [inline] [] ext4_init_inode_table+0x151/0x350 fs/ext4/ialloc.c:1371 [] ext4_run_li_request fs/ext4/super.c:2654 [inline] [] ext4_lazyinit_thread+0x201/0x340 fs/ext4/super.c:2736 [] kthread+0xc4/0xe0 kernel/kthread.c:209 [] ret_from_fork+0x1f/0x40 arch/x86/entry/entry_64.S:389 [] 0xffffffffffffffff