program: r0 = openat$dm_control(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0) ioctl$DM_DEV_CREATE(r0, 0xc138fd03, &(0x7f0000000100)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x0, 0x0, 0x0, {0x0, {'syz', 0x0, '2\x00'}}}) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, &(0x7f0000000400)={0x4, 0x0, 0x0, 0x1b8, 0x138, 0x1, 0x0, 0x80210, 0x0, 0x0, @by_dev={r1}, [@snapshot={0x0, 0x2000, 0x0, 0x80, 'snapshot\x00', {@ram_num={'1:', 0x1}, 0x20, @ram={'/dev/ram', 0x0}, 0x20, 'PO', 0x20, '8', ' 2 discard_zeroes_cow discard_passdown_origin'}}]}) [ 90.383706][ T5298] Bluetooth: hci0: command tx timeout [ 90.559909][ T1984] cfg80211: failed to load regulatory.db [ 91.586183][ T5340] Oops: divide error: 0000 [#1] SMP KASAN NOPTI [ 91.592021][ T5340] CPU: 0 UID: 0 PID: 5340 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 91.598820][ T5340] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 91.609257][ T5340] RIP: 0010:blk_stack_limits+0x1105/0x2d00 [ 91.616582][ T5340] Code: 68 48 4c 89 e8 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 7c 18 00 00 45 8b 65 00 c7 44 24 10 00 00 00 00 eb 5f 48 8b 44 24 48 31 d2 <41> f7 f5 44 01 e9 29 d1 89 c8 31 d2 41 f7 f5 48 8b 44 24 08 4c 8d [ 91.627457][ T5340] RSP: 0018:ffffc9000e2d74f8 EFLAGS: 00010246 [ 91.630211][ T5340] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 [ 91.635286][ T5340] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000 [ 91.644168][ T5340] RBP: ffffc9000e2d7850 R08: ffffc9000e2d77e0 R09: 1ffffffff3804204 [ 91.654808][ T5340] R10: dffffc0000000000 R11: ffffffff88ad5260 R12: 00000000ffffffff [ 91.659261][ T5340] R13: 0000000000000000 R14: 1ffff92001c5af0a R15: ffffc9000e2d7854 [ 91.673265][ T5340] FS: 00007f76398ad6c0(0000) GS:ffff88808ac38000(0000) knlGS:0000000000000000 [ 91.677274][ T5340] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 91.680998][ T5340] CR2: 00007f7638bfa6b8 CR3: 0000000038df0000 CR4: 0000000000352ef0 [ 91.695480][ T5340] Call Trace: [ 91.697893][ T5340] [ 91.700017][ T5340] dm_calculate_queue_limits+0x70c/0x1510 [ 91.703968][ T5340] ? __pfx_dm_calculate_queue_limits+0x10/0x10 [ 91.716525][ T5340] ? kmem_cache_alloc_noprof+0x151/0x600 [ 91.720139][ T5340] ? kasan_save_free_info+0x40/0x50 [ 91.723373][ T5340] ? __kasan_mempool_poison_object+0x16e/0x1d0 [ 91.735683][ T5340] ? mempool_init_node+0x474/0x510 [ 91.738766][ T5340] ? __pfx_bioset_init+0x10/0x10 [ 91.741868][ T5340] dm_setup_md_queue+0x199/0x4f0 [ 91.747571][ T5340] ? dm_table_complete+0x1d84/0x22d0 [ 91.753515][ T5340] ? __pfx_dm_setup_md_queue+0x10/0x10 [ 91.757004][ T5340] ? __pfx_dm_table_complete+0x10/0x10 [ 91.761513][ T5340] table_load+0x4fd/0x8a0 [ 91.765621][ T5340] ? __pfx_table_load+0x10/0x10 [ 91.769919][ T5340] dm_ctl_ioctl+0x9ec/0xe10 [ 91.774050][ T5340] ? __pfx_table_load+0x10/0x10 [ 91.777951][ T5340] ? __pfx_dm_ctl_ioctl+0x10/0x10 [ 91.781875][ T5340] ? __fget_files+0x2a/0x420 [ 91.785776][ T5340] ? bpf_lsm_file_ioctl+0x9/0x20 [ 91.789956][ T5340] ? __pfx_dm_ctl_ioctl+0x10/0x10 [ 91.794401][ T5340] __se_sys_ioctl+0xfc/0x170 [ 91.798088][ T5340] do_syscall_64+0x166/0x520 [ 91.801451][ T5340] ? trace_irq_disable+0x3b/0x140 [ 91.806050][ T5340] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 91.811620][ T5340] ? clear_bhb_loop+0x70/0xc0 [ 91.824187][ T5340] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 91.826976][ T5340] RIP: 0033:0x7f763899f559 [ 91.828824][ T5340] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 [ 91.854755][ T5340] RSP: 002b:00007f76398acfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 91.859808][ T5340] RAX: ffffffffffffffda RBX: 00007f7638c25fa0 RCX: 00007f763899f559 [ 91.864635][ T5340] RDX: 0000200000000400 RSI: 00000000c138fd09 RDI: 0000000000000003 [ 91.869431][ T5340] RBP: 00007f7638a36b20 R08: 0000000000000000 R09: 0000000000000000 [ 91.888703][ T5340] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 91.893382][ T5340] R13: 00007f7638c26038 R14: 00007f7638c25fa0 R15: 00007fff4acc17b8 [ 91.900799][ T5340] [ 91.902790][ T5340] Modules linked in: [ 91.921720][ T5340] ---[ end trace 0000000000000000 ]--- [ 91.946823][ T5340] RIP: 0010:blk_stack_limits+0x1105/0x2d00 [ 91.947232][ T5340] Code: 68 48 4c 89 e8 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 7c 18 00 00 45 8b 65 00 c7 44 24 10 00 00 00 00 eb 5f 48 8b 44 24 48 31 d2 <41> f7 f5 44 01 e9 29 d1 89 c8 31 d2 41 f7 f5 48 8b 44 24 08 4c 8d [ 91.947323][ T5340] RSP: 0018:ffffc9000e2d74f8 EFLAGS: 00010246 [ 91.947462][ T5340] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 [ 91.947469][ T5340] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000 [ 91.947476][ T5340] RBP: ffffc9000e2d7850 R08: ffffc9000e2d77e0 R09: 1ffffffff3804204 [ 91.947483][ T5340] R10: dffffc0000000000 R11: ffffffff88ad5260 R12: 00000000ffffffff [ 91.947490][ T5340] R13: 0000000000000000 R14: 1ffff92001c5af0a R15: ffffc9000e2d7854 [ 91.947610][ T5340] FS: 00007f76398ad6c0(0000) GS:ffff88808ac38000(0000) knlGS:0000000000000000 [ 91.947623][ T5340] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 91.947631][ T5340] CR2: 00007f7638bfa6b8 CR3: 0000000038df0000 CR4: 0000000000352ef0 [ 91.947744][ T5340] Kernel panic - not syncing: Fatal exception [ 92.010804][ T5340] Kernel Offset: disabled [ 92.015069][ T5340] Rebooting in 86400 seconds..