[ OK ] Started System Logging Service. [ OK ] Found device /dev/ttyS0. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty2. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Started OpenBSD Secure Shell server. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.173' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 34.374425] md: md1 stopped. [ 34.378693] WARNING: CPU: 1 PID: 8121 at drivers/md/md.c:7217 md_ioctl+0x3c7b/0x5620 [ 34.386646] Kernel panic - not syncing: panic_on_warn set ... [ 34.386646] [ 34.394067] CPU: 1 PID: 8121 Comm: syz-executor385 Not tainted 4.19.162-syzkaller #0 [ 34.401927] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.411388] Call Trace: [ 34.413979] dump_stack+0x1fc/0x2fe [ 34.417611] panic+0x26a/0x50e [ 34.420805] ? __warn_printk+0xf3/0xf3 [ 34.424690] ? md_ioctl+0x3c7b/0x5620 [ 34.428536] ? __probe_kernel_read+0x130/0x1b0 [ 34.433111] ? __warn.cold+0x5/0x61 [ 34.436732] ? __warn+0xe4/0x200 [ 34.440106] ? md_ioctl+0x3c7b/0x5620 [ 34.443912] __warn.cold+0x20/0x61 [ 34.447458] ? md_ioctl+0x3c7b/0x5620 [ 34.451274] report_bug+0x262/0x2b0 [ 34.454898] do_error_trap+0x1d7/0x310 [ 34.458779] ? math_error+0x310/0x310 [ 34.462613] ? __mutex_lock+0x3a8/0x1260 [ 34.466661] ? error_entry+0x72/0xd0 [ 34.470382] ? trace_hardirqs_off_caller+0x6e/0x210 [ 34.475393] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.480228] invalid_op+0x14/0x20 [ 34.483665] RIP: 0010:md_ioctl+0x3c7b/0x5620 [ 34.488055] Code: 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 07 0b 00 00 c7 85 40 01 00 00 00 00 00 00 e9 bc eb ff ff e8 a5 50 91 fb <0f> 0b e9 24 d2 ff ff 41 be f3 ff ff ff e9 68 c4 ff ff 44 89 44 24 [ 34.507116] RSP: 0018:ffff88809100f988 EFLAGS: 00010293 [ 34.512458] RAX: ffff8880b0302080 RBX: 1ffff11012201f39 RCX: ffffffff85d35168 [ 34.519711] RDX: 0000000000000000 RSI: ffffffff85d37f4b RDI: 0000000000000007 [ 34.526960] RBP: ffff888094d34e00 R08: 0000000000000000 R09: 0000000000000000 [ 34.534311] R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000932 [ 34.541602] R13: 0000000000000932 R14: ffff888094d34fc8 R15: ffff88808e453080 [ 34.548887] ? md_ioctl+0xe98/0x5620 [ 34.552599] ? md_ioctl+0x3c7b/0x5620 [ 34.556400] ? md_ioctl+0x3c7b/0x5620 [ 34.560200] ? add_new_disk+0x1850/0x1850 [ 34.564358] ? lock_acquire+0x170/0x3c0 [ 34.568329] ? drop_futex_key_refs+0xe0/0xe0 [ 34.572735] ? drop_futex_key_refs+0x6f/0xe0 [ 34.577156] ? futex_wait+0x438/0x590 [ 34.580965] ? futex_wait_setup+0x300/0x300 [ 34.585272] ? hash_futex+0x12/0x200 [ 34.589236] ? drop_futex_key_refs+0x6f/0xe0 [ 34.593644] ? futex_wake+0x159/0x480 [ 34.597429] ? __lock_acquire+0x6de/0x3ff0 [ 34.601654] ? add_new_disk+0x1850/0x1850 [ 34.605786] blkdev_ioctl+0x5cb/0x1a7e [ 34.609656] ? blkpg_ioctl+0x9d0/0x9d0 [ 34.613527] ? do_futex+0x163/0x1c70 [ 34.617224] ? mark_held_locks+0xf0/0xf0 [ 34.621269] ? ksys_mount+0xf4/0x130 [ 34.624969] ? __x64_sys_mount+0xba/0x150 [ 34.629113] ? do_syscall_64+0xf9/0x620 [ 34.633095] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.638453] ? iov_iter_init+0xb8/0x1d0 [ 34.642427] ? iov_iter_init+0xb8/0x1d0 [ 34.646386] ? exit_robust_list+0x2e0/0x2e0 [ 34.650695] block_ioctl+0xe9/0x130 [ 34.654318] ? blkdev_fallocate+0x3f0/0x3f0 [ 34.658624] do_vfs_ioctl+0xcdb/0x12e0 [ 34.662499] ? lock_downgrade+0x720/0x720 [ 34.666640] ? check_preemption_disabled+0x41/0x280 [ 34.671661] ? ioctl_preallocate+0x200/0x200 [ 34.676055] ? __fget+0x356/0x510 [ 34.679504] ? do_dup2+0x450/0x450 [ 34.683026] ? __se_sys_futex+0x298/0x3b0 [ 34.687348] ksys_ioctl+0x9b/0xc0 [ 34.690797] __x64_sys_ioctl+0x6f/0xb0 [ 34.694682] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 34.699249] do_syscall_64+0xf9/0x620 [ 34.703037] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.708207] RIP: 0033:0x447369 [ 34.711382] Code: e8 3c e7 ff ff 48 83 c4 18 c3 0f 1f 80 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 0f 83 0b 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 34.730278] RSP: 002b:00007f7129493d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 34.737995] RAX: ffffffffffffffda RBX: 00000000006dec48 RCX: 0000000000447369 [ 34.745254] RDX: 0000000000000000 RSI: 0000000000000932 RDI: 0000000000000004 [ 34.752529] RBP: 00000000006dec40 R08: 0000000000000000 R09: 0000000000000000 [ 34.759792] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dec4c [ 34.767055] R13: 0000000020000000 R14: 00000000004af9e0 R15: 0000000000000003 [ 34.774953] Kernel Offset: disabled [ 34.778608] Rebooting in 86400 seconds..