[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.16' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 28.781710] print_req_error: I/O error, dev loop1, sector 0 [ 28.787609] Buffer I/O error on dev loop1, logical block 0, async page read [ 28.800330] print_req_error: I/O error, dev loop0, sector 0 [ 28.805900] print_req_error: I/O error, dev loop2, sector 0 [ 28.806448] Buffer I/O error on dev loop0, logical block 0, async page read [ 28.811815] Buffer I/O error on dev loop2, logical block 0, async page read [ 28.824628] print_req_error: I/O error, dev loop4, sector 0 [ 28.827966] print_req_error: I/O error, dev loop0, sector 8 [ 28.832059] Buffer I/O error on dev loop4, logical block 0, async page read [ 28.837993] print_req_error: I/O error, dev loop3, sector 0 [ 28.845114] Unable to read inode block [ 28.851321] Buffer I/O error on dev loop3, logical block 0, async page read [ 28.862329] print_req_error: I/O error, dev loop3, sector 8 [ 28.868098] print_req_error: I/O error, dev loop5, sector 0 [ 28.875187] MINIX-fs: get root inode failed executing program executing program executing program executing program executing program [ 28.876424] Unable to read inode block [ 28.883476] Buffer I/O error on dev loop5, logical block 0, async page read [ 28.884578] print_req_error: I/O error, dev loop1, sector 2 [ 28.890649] print_req_error: I/O error, dev loop5, sector 8 [ 28.893086] MINIX-fs: get root inode failed [ 28.896837] MINIX-fs: unable to read superblock [ 28.902464] MINIX-fs: unable to read superblock [ 28.909653] MINIX-fs: unable to read superblock [ 28.911441] Unable to read inode block [ 28.926003] MINIX-fs: get root inode failed executing program [ 28.982081] Buffer I/O error on dev loop4, logical block 0, async page read [ 28.982403] Buffer I/O error on dev loop3, logical block 0, async page read [ 29.000289] Buffer I/O error on dev loop5, logical block 0, async page read [ 29.001280] Buffer I/O error on dev loop0, logical block 0, async page read [ 29.018835] MINIX-fs: unable to read superblock [ 29.024144] Unable to read inode block executing program executing program executing program executing program executing program [ 29.028742] Unable to read inode block [ 29.033341] MINIX-fs: unable to read superblock [ 29.039099] MINIX-fs: unable to read superblock [ 29.049866] MINIX-fs: get root inode failed [ 29.054324] MINIX-fs: get root inode failed [ 29.104323] ------------[ cut here ]------------ [ 29.109233] WARNING: CPU: 1 PID: 8079 at fs/buffer.c:1149 mark_buffer_dirty+0x347/0x480 [ 29.117366] Kernel panic - not syncing: panic_on_warn set ... [ 29.117366] [ 29.124724] CPU: 1 PID: 8079 Comm: syz-executor415 Not tainted 4.14.285-syzkaller #0 [ 29.132595] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.141944] Call Trace: [ 29.144534] dump_stack+0x1b2/0x281 [ 29.148160] panic+0x1f9/0x42d [ 29.151468] ? add_taint.cold+0x16/0x16 [ 29.155434] ? mark_buffer_dirty+0x347/0x480 [ 29.159819] ? mark_buffer_dirty+0x347/0x480 [ 29.164202] __warn.cold+0x20/0x44 [ 29.167723] ? ist_end_non_atomic+0x10/0x10 [ 29.172031] ? mark_buffer_dirty+0x347/0x480 [ 29.176426] report_bug+0x208/0x250 [ 29.180047] do_error_trap+0x195/0x2d0 [ 29.183911] ? math_error+0x2d0/0x2d0 [ 29.187692] ? debug_object_free+0x320/0x320 [ 29.192090] ? lock_acquire+0x170/0x3f0 [ 29.196389] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.201223] invalid_op+0x1b/0x40 [ 29.204668] RIP: 0010:mark_buffer_dirty+0x347/0x480 [ 29.209681] RSP: 0018:ffff88809568fd08 EFLAGS: 00010297 [ 29.215026] RAX: ffff888098030680 RBX: ffff88808dec2540 RCX: 0000000000000001 [ 29.222310] RDX: 0000000000000000 RSI: 1ffff11012ad1fa4 RDI: ffff88808dec2540 [ 29.229591] RBP: ffff8880a5d9ec00 R08: 0000000000000286 R09: 0000000000000000 [ 29.236842] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880af8d4880 [ 29.244185] R13: 0000000000000000 R14: 0000000000000007 R15: fffffbfff14123ae [ 29.251457] ? mark_buffer_dirty+0x347/0x480 [ 29.255855] minix_put_super+0x179/0x4a0 [ 29.259901] ? fsnotify_unmount_inodes+0x1a2/0x210 [ 29.264816] ? minix_mount+0x40/0x40 [ 29.268516] generic_shutdown_super+0x144/0x370 [ 29.273179] kill_block_super+0x95/0xe0 [ 29.277132] deactivate_locked_super+0x6c/0xd0 [ 29.281702] deactivate_super+0x7f/0xa0 [ 29.285674] cleanup_mnt+0x186/0x2c0 [ 29.289369] task_work_run+0x11f/0x190 [ 29.293246] exit_to_usermode_loop+0x1ad/0x200 [ 29.297822] ? SyS_mount+0xd1/0x120 [ 29.301441] do_syscall_64+0x4a3/0x640 [ 29.305309] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.310590] RIP: 0033:0x7f72242354e9 [ 29.314289] RSP: 002b:00007f72241c12f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 29.321979] RAX: ffffffffffffffec RBX: 00007f72242ba3f0 RCX: 00007f72242354e9 [ 29.329424] RDX: 0000000020000140 RSI: 00000000200000c0 RDI: 00000000200002c0 [ 29.337706] RBP: 00007f72242870c0 R08: 0000000000000000 R09: 0000000000000000 [ 29.344968] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 29.352219] R13: 6f6f6c2f7665642f R14: 000000807fffffff R15: 00007f72242ba3f8 [ 29.359809] Kernel Offset: disabled [ 29.363470] Rebooting in 86400 seconds..