[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.85' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 62.484961][ T7020] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 62.499037][ T7020] ------------[ cut here ]------------ [ 62.504687][ T7020] WARNING: CPU: 1 PID: 7020 at fs/inode.c:360 inc_nlink+0x144/0x160 [ 62.512816][ T7020] Kernel panic - not syncing: panic_on_warn set ... [ 62.519409][ T7020] CPU: 1 PID: 7020 Comm: syz-executor084 Not tainted 5.7.0-rc1-syzkaller #0 [ 62.528076][ T7020] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.538912][ T7020] Call Trace: [ 62.542215][ T7020] dump_stack+0x188/0x20d [ 62.546544][ T7020] ? inc_nlink+0xc0/0x160 [ 62.550862][ T7020] panic+0x2e3/0x75c [ 62.554739][ T7020] ? add_taint.cold+0x16/0x16 [ 62.559401][ T7020] ? printk+0xba/0xed [ 62.563366][ T7020] ? kmsg_dump_rewind_nolock+0xd9/0xd9 [ 62.568803][ T7020] ? __warn.cold+0x14/0x35 [ 62.573204][ T7020] ? __warn+0xd5/0x1c8 [ 62.577265][ T7020] ? inc_nlink+0x144/0x160 [ 62.581669][ T7020] __warn.cold+0x2f/0x35 [ 62.585890][ T7020] ? inc_nlink+0x144/0x160 [ 62.590303][ T7020] report_bug+0x27b/0x2f0 [ 62.594623][ T7020] do_error_trap+0x12b/0x220 [ 62.599209][ T7020] ? inc_nlink+0x144/0x160 [ 62.603625][ T7020] do_invalid_op+0x32/0x40 [ 62.608169][ T7020] ? inc_nlink+0x144/0x160 [ 62.612615][ T7020] invalid_op+0x23/0x30 [ 62.616757][ T7020] RIP: 0010:inc_nlink+0x144/0x160 [ 62.621799][ T7020] Code: ff 4c 89 e7 e8 ed 6f ee ff e9 42 ff ff ff 4c 89 e7 e8 70 6f ee ff e9 fc fe ff ff 4c 89 e7 e8 63 6f ee ff eb d4 e8 7c a8 b0 ff <0f> 0b e9 6e ff ff ff e8 60 6f ee ff e9 44 ff ff ff e8 56 6f ee ff [ 62.641698][ T7020] RSP: 0018:ffffc90000f77d88 EFLAGS: 00010293 [ 62.647814][ T7020] RAX: ffff888095756140 RBX: ffff88808615ba00 RCX: ffffffff81c28af0 [ 62.655767][ T7020] RDX: 0000000000000000 RSI: ffffffff81c28b84 RDI: 0000000000000007 [ 62.663728][ T7020] RBP: 0000000000000000 R08: ffff888095756140 R09: ffffed1015440757 [ 62.671765][ T7020] R10: ffff8880aa203ab3 R11: ffffed1015440756 R12: ffff88808615ba48 [ 62.679725][ T7020] R13: ffff888089476450 R14: ffff8880894764b0 R15: 0000000000000000 [ 62.687700][ T7020] ? inc_nlink+0xb0/0x160 [ 62.692004][ T7020] ? inc_nlink+0x144/0x160 [ 62.696401][ T7020] ? inc_nlink+0x144/0x160 [ 62.700806][ T7020] minix_mkdir+0x71/0x1b0 [ 62.705135][ T7020] ? minix_create+0x30/0x30 [ 62.709631][ T7020] ? generic_permission+0x116/0x520 [ 62.714826][ T7020] ? security_inode_permission+0xc4/0xf0 [ 62.720509][ T7020] ? security_inode_mkdir+0xd9/0x110 [ 62.725807][ T7020] vfs_mkdir+0x419/0x690 [ 62.730036][ T7020] do_mkdirat+0x21e/0x280 [ 62.734353][ T7020] ? __ia32_sys_mknod+0xb0/0xb0 [ 62.739188][ T7020] ? trace_hardirqs_off_caller+0x55/0x230 [ 62.744902][ T7020] do_syscall_64+0xf6/0x7d0 [ 62.749402][ T7020] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 62.755285][ T7020] RIP: 0033:0x444a69 [ 62.759156][ T7020] Code: 0d d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 db d7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 62.778745][ T7020] RSP: 002b:00007ffcf1e233c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 [ 62.787144][ T7020] RAX: ffffffffffffffda RBX: 00007ffcf1e233d0 RCX: 0000000000444a69 [ 62.795103][ T7020] RDX: 0000000000000050 RSI: 0000000020000040 RDI: 0000000000000003 [ 62.803063][ T7020] RBP: 0000000000000000 R08: 0000000000400e50 R09: 0000000000400e50 [ 62.811387][ T7020] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004026d0 [ 62.819361][ T7020] R13: 0000000000402760 R14: 0000000000000000 R15: 0000000000000000 [ 62.829054][ T7020] Kernel Offset: disabled [ 62.833436][ T7020] Rebooting in 86400 seconds..