BUG at fs/jfs/jfs_logmgr.c:2325 assert(bp->l_flag & lbmRELEASE) ------------[ cut here ]------------ kernel BUG at fs/jfs/jfs_logmgr.c:2325! invalid opcode: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 31637 Comm: loop1 Not tainted 4.14.198-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88803ab34440 task.stack: ffff888049fc0000 RIP: 0010:lbmIODone.cold+0x24/0x5b fs/jfs/jfs_logmgr.c:2325 RSP: 0018:ffff888049fc7b00 EFLAGS: 00010082 RAX: 000000000000003f RBX: ffff88808f8d9900 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff86ac12c0 RDI: ffffed10093f8f56 RBP: 0000000000000020 R08: 000000000000003f R09: 0000000000000001 R10: 0000000000000000 R11: ffff88803ab34440 R12: 0000000000000286 R13: 0000000000000000 R14: ffff8880a029d6c0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001590004 CR3: 000000004f5de000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bio_endio+0x27a/0x680 block/bio.c:1918 req_bio_endio block/blk-core.c:204 [inline] blk_update_request+0x2d0/0xa30 block/blk-core.c:2765 blk_mq_end_request+0x4c/0x1e0 block/blk-mq.c:530 __blk_mq_complete_request+0x30b/0x6c0 block/blk-mq.c:571 blk_mq_complete_request+0x52/0x60 block/blk-mq.c:591 loop_handle_cmd drivers/block/loop.c:1784 [inline] loop_queue_work+0x227/0x1e80 drivers/block/loop.c:1793 kthread_worker_fn+0x271/0x6c0 kernel/kthread.c:642 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Code: 55 ff e8 cb ff ff ff e8 bd 65 2b ff 48 c7 c1 80 58 d1 86 ba 15 09 00 00 48 c7 c6 00 58 d1 86 48 c7 c7 40 58 d1 86 e8 ff 04 1a ff <0f> 0b e8 97 65 2b ff 48 c7 c1 c0 58 d1 86 ba 16 09 00 00 48 c7 RIP: lbmIODone.cold+0x24/0x5b fs/jfs/jfs_logmgr.c:2325 RSP: ffff888049fc7b00 ---[ end trace fe6320b2f48785b7 ]---