[ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty1. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.4' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 32.621568] FAULT_INJECTION: forcing a failure. [ 32.621568] name failslab, interval 1, probability 0, space 0, times 1 [ 32.632968] CPU: 1 PID: 8109 Comm: syz-executor393 Not tainted 4.19.211-syzkaller #0 [ 32.640840] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.650171] Call Trace: [ 32.652759] dump_stack+0x1fc/0x2ef [ 32.656389] should_fail.cold+0xa/0xf [ 32.660175] ? should_fail+0x142/0x7b0 [ 32.664044] ? setup_fault_attr+0x200/0x200 [ 32.668353] __should_failslab+0x115/0x180 [ 32.672605] should_failslab+0x5/0x10 [ 32.676391] kmem_cache_alloc_node_trace+0x244/0x3b0 [ 32.681488] blk_alloc_flush_queue+0x76/0x300 [ 32.685970] blk_mq_realloc_hw_ctxs+0x7bc/0x1000 [ 32.690715] blk_mq_update_nr_hw_queues+0x557/0xb50 [ 32.695734] ? workqueue_sysfs_register+0x391/0x3e0 [ 32.700735] ? blk_mq_init_queue+0xa0/0xa0 [ 32.704965] ? apparmor_sb_mount+0x970/0x970 [ 32.709360] nbd_start_device+0x1f2/0xd60 [ 32.713498] ? security_capable+0x8f/0xc0 [ 32.717634] nbd_ioctl+0x62c/0xbe0 [ 32.721163] ? _copy_from_user+0xd2/0x130 [ 32.725297] ? nbd_disconnect_and_put+0x190/0x190 [ 32.730152] ? get_pid_task+0xcd/0x190 [ 32.734025] ? check_preemption_disabled+0x41/0x280 [ 32.739027] ? lock_downgrade+0x720/0x720 [ 32.743158] ? nbd_disconnect_and_put+0x190/0x190 [ 32.747981] blkdev_ioctl+0x5cb/0x1a80 [ 32.751871] ? blkpg_ioctl+0x9d0/0x9d0 [ 32.755742] ? get_pid_task+0xf4/0x190 [ 32.759611] ? proc_fail_nth_write+0x95/0x1d0 [ 32.764090] ? proc_tgid_io_accounting+0x7f0/0x7f0 [ 32.769000] ? debug_check_no_obj_freed+0x201/0x490 [ 32.773997] block_ioctl+0xe9/0x130 [ 32.777620] ? blkdev_fallocate+0x3f0/0x3f0 [ 32.781932] do_vfs_ioctl+0xcdb/0x12e0 [ 32.785806] ? vfs_write+0x3d7/0x540 [ 32.789504] ? ioctl_preallocate+0x200/0x200 [ 32.793899] ? lock_downgrade+0x720/0x720 [ 32.798034] ? check_preemption_disabled+0x41/0x280 [ 32.803039] ? vfs_write+0x393/0x540 [ 32.806740] ? ksys_write+0x1c8/0x2a0 [ 32.810530] ksys_ioctl+0x9b/0xc0 [ 32.813969] __x64_sys_ioctl+0x6f/0xb0 [ 32.817838] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 32.822402] do_syscall_64+0xf9/0x620 [ 32.826188] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 32.831357] RIP: 0033:0x7fd3fb522dd9 [ 32.835049] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48 [ 32.854017] RSP: 002b:00007ffc7aac7958 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 32.861704] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fd3fb522dd9 [ 32.868954] RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000007 [ 32.876208] RBP: 00007ffc7aac7960 R08: 0000000000000002 R09: 00007fd3fb003431 [ 32.883456] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008 [ 32.890722] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 32.900567] BUG: unable to handle kernel NULL pointer dereference at 0000000000000118 [ 32.908540] PGD a8df7067 P4D a8df7067 PUD aae78067 PMD 0 [ 32.914083] Oops: 0002 [#1] PREEMPT SMP KASAN [ 32.918569] CPU: 1 PID: 8109 Comm: syz-executor393 Not tainted 4.19.211-syzkaller #0 [ 32.926616] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.935960] RIP: 0010:blk_mq_map_swqueue+0x287/0xa20 [ 32.941046] Code: c1 ea 03 80 3c 1a 00 0f 85 cf 06 00 00 89 ee bf 07 00 00 00 4d 8b 3f e8 47 04 fd fd 83 fd 07 0f 87 04 05 00 00 e8 c9 02 fd fd 4d 0f ab b7 18 01 00 00 49 8d bf 74 01 00 00 48 89 fa 48 c1 ea [ 32.959933] RSP: 0018:ffff8880a35ef920 EFLAGS: 00010293 [ 32.965278] RAX: ffff88809527e2c0 RBX: dffffc0000000000 RCX: ffffffff83658299 [ 32.972650] RDX: 0000000000000000 RSI: ffffffff836582a7 RDI: 0000000000000005 [ 32.979929] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000007 [ 32.987184] R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880aeac9080 [ 32.994437] R13: ffffe8ffffd37f80 R14: 0000000000000001 R15: 0000000000000000 [ 33.001689] FS: 0000555556654300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 33.009890] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.015747] CR2: 0000000000000118 CR3: 0000000097161000 CR4: 00000000003406e0 [ 33.023083] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.030345] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.037604] Call Trace: [ 33.040178] blk_mq_update_nr_hw_queues+0x5bb/0xb50 [ 33.045172] ? workqueue_sysfs_register+0x391/0x3e0 [ 33.050184] ? blk_mq_init_queue+0xa0/0xa0 [ 33.054404] ? apparmor_sb_mount+0x970/0x970 [ 33.058908] nbd_start_device+0x1f2/0xd60 [ 33.063049] ? security_capable+0x8f/0xc0 [ 33.067181] nbd_ioctl+0x62c/0xbe0 [ 33.070759] ? _copy_from_user+0xd2/0x130 [ 33.074995] ? nbd_disconnect_and_put+0x190/0x190 [ 33.079821] ? get_pid_task+0xcd/0x190 [ 33.083710] ? check_preemption_disabled+0x41/0x280 [ 33.088707] ? lock_downgrade+0x720/0x720 [ 33.092838] ? nbd_disconnect_and_put+0x190/0x190 [ 33.097662] blkdev_ioctl+0x5cb/0x1a80 [ 33.101541] ? blkpg_ioctl+0x9d0/0x9d0 [ 33.105411] ? get_pid_task+0xf4/0x190 [ 33.109278] ? proc_fail_nth_write+0x95/0x1d0 [ 33.113753] ? proc_tgid_io_accounting+0x7f0/0x7f0 [ 33.118662] ? debug_check_no_obj_freed+0x201/0x490 [ 33.123663] block_ioctl+0xe9/0x130 [ 33.127267] ? blkdev_fallocate+0x3f0/0x3f0 [ 33.131567] do_vfs_ioctl+0xcdb/0x12e0 [ 33.135440] ? vfs_write+0x3d7/0x540 [ 33.139131] ? ioctl_preallocate+0x200/0x200 [ 33.143522] ? lock_downgrade+0x720/0x720 [ 33.147654] ? check_preemption_disabled+0x41/0x280 [ 33.152657] ? vfs_write+0x393/0x540 [ 33.156346] ? ksys_write+0x1c8/0x2a0 [ 33.160125] ksys_ioctl+0x9b/0xc0 [ 33.163556] __x64_sys_ioctl+0x6f/0xb0 [ 33.167421] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 33.171998] do_syscall_64+0xf9/0x620 [ 33.175781] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.180946] RIP: 0033:0x7fd3fb522dd9 [ 33.184638] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48 [ 33.203523] RSP: 002b:00007ffc7aac7958 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 33.211226] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fd3fb522dd9 [ 33.218473] RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000007 [ 33.225721] RBP: 00007ffc7aac7960 R08: 0000000000000002 R09: 00007fd3fb003431 [ 33.232971] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008 [ 33.240217] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 33.247467] Modules linked in: [ 33.250645] CR2: 0000000000000118 [ 33.254078] ---[ end trace f98b5402d659aee2 ]--- [ 33.258818] RIP: 0010:blk_mq_map_swqueue+0x287/0xa20 [ 33.263907] Code: c1 ea 03 80 3c 1a 00 0f 85 cf 06 00 00 89 ee bf 07 00 00 00 4d 8b 3f e8 47 04 fd fd 83 fd 07 0f 87 04 05 00 00 e8 c9 02 fd fd 4d 0f ab b7 18 01 00 00 49 8d bf 74 01 00 00 48 89 fa 48 c1 ea [ 33.282788] RSP: 0018:ffff8880a35ef920 EFLAGS: 00010293 [ 33.288132] RAX: ffff88809527e2c0 RBX: dffffc0000000000 RCX: ffffffff83658299 [ 33.295378] RDX: 0000000000000000 RSI: ffffffff836582a7 RDI: 0000000000000005 [ 33.302626] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000007 [ 33.309880] R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880aeac9080 [ 33.317127] R13: ffffe8ffffd37f80 R14: 0000000000000001 R15: 0000000000000000 [ 33.324375] FS: 0000555556654300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 33.332579] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.338450] CR2: 0000000000000118 CR3: 0000000097161000 CR4: 00000000003406e0 [ 33.345718] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.352970] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.360219] Kernel panic - not syncing: Fatal exception [ 33.365831] Kernel Offset: disabled [ 33.369443] Rebooting in 86400 seconds..