2019/08/14 00:57:44 executed programs: 23 2019/08/14 00:57:50 executed programs: 34 BUG: memory leak unreferenced object 0xffff888108803800 (size 2048): comm "syz-executor.0", pid 7141, jiffies 4294950542 (age 20.910s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 20 00 00 00 90 00 00 00 00 00 00 00 00 00 00 00 ............... backtrace: [<000000005fb07acb>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<000000005fb07acb>] slab_post_alloc_hook mm/slab.h:522 [inline] [<000000005fb07acb>] slab_alloc mm/slab.c:3319 [inline] [<000000005fb07acb>] __do_kmalloc mm/slab.c:3653 [inline] [<000000005fb07acb>] __kmalloc+0x169/0x300 mm/slab.c:3664 [<00000000cd35e6e9>] kmalloc include/linux/slab.h:557 [inline] [<00000000cd35e6e9>] bio_alloc_bioset+0x1b8/0x2c0 block/bio.c:440 [<000000002be1c53c>] bio_kmalloc include/linux/bio.h:405 [inline] [<000000002be1c53c>] bio_copy_user_iov+0x112/0x4b0 block/bio.c:1263 [<00000000149cc9be>] __blk_rq_map_user_iov block/blk-map.c:73 [inline] [<00000000149cc9be>] blk_rq_map_user_iov+0xc6/0x2b0 block/blk-map.c:142 [<00000000e3452a5e>] blk_rq_map_user+0x71/0xb0 block/blk-map.c:172 [<000000007fb80761>] sg_start_req drivers/scsi/sg.c:1813 [inline] [<000000007fb80761>] sg_common_write.isra.0+0x619/0xa10 drivers/scsi/sg.c:809 [<00000000eba40f08>] sg_write.part.0+0x325/0x570 drivers/scsi/sg.c:709 [<000000003fb4538d>] sg_write+0x44/0x64 drivers/scsi/sg.c:617 [<00000000142fed03>] __vfs_write+0x43/0xa0 fs/read_write.c:494 [<000000006058ea08>] vfs_write fs/read_write.c:558 [inline] [<000000006058ea08>] vfs_write+0xee/0x210 fs/read_write.c:542 [<00000000ad5375a4>] ksys_write+0x7c/0x130 fs/read_write.c:611 [<00000000aed5c568>] __do_sys_write fs/read_write.c:623 [inline] [<00000000aed5c568>] __se_sys_write fs/read_write.c:620 [inline] [<00000000aed5c568>] __x64_sys_write+0x1e/0x30 fs/read_write.c:620 [<000000000d671db5>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:296 [<00000000e8cc1ea3>] entry_SYSCALL_64_after_hwframe+0x44/0xa9