[ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started Getty on tty2. [ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.182' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.416436] ------------[ cut here ]------------ [ 33.425429] WARNING: CPU: 0 PID: 8088 at fs/overlayfs/file.c:60 ovl_real_fdget_meta.cold+0x11/0x1e [ 33.434535] Kernel panic - not syncing: panic_on_warn set ... [ 33.434535] [ 33.441886] CPU: 0 PID: 8088 Comm: syz-executor556 Not tainted 4.19.211-syzkaller #0 [ 33.449746] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 [ 33.459083] Call Trace: [ 33.461657] dump_stack+0x1fc/0x2ef [ 33.465269] panic+0x26a/0x50e [ 33.468444] ? __warn_printk+0xf3/0xf3 [ 33.472316] ? ovl_real_fdget_meta.cold+0x11/0x1e [ 33.477159] ? __probe_kernel_read+0x130/0x1b0 [ 33.481736] ? __warn.cold+0x5/0x5a [ 33.485348] ? __warn+0xe4/0x200 [ 33.488698] ? ovl_real_fdget_meta.cold+0x11/0x1e [ 33.493524] __warn.cold+0x20/0x5a [ 33.497046] ? ovl_real_fdget_meta.cold+0x11/0x1e [ 33.501879] report_bug+0x262/0x2b0 [ 33.505491] do_error_trap+0x1d7/0x310 [ 33.509373] ? math_error+0x310/0x310 [ 33.513169] ? __irq_work_queue_local+0x101/0x160 [ 33.518004] ? irq_work_queue+0x29/0x80 [ 33.521986] ? error_entry+0x72/0xd0 [ 33.525685] ? trace_hardirqs_off_caller+0x6e/0x210 [ 33.530684] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.535511] invalid_op+0x14/0x20 [ 33.538950] RIP: 0010:ovl_real_fdget_meta.cold+0x11/0x1e [ 33.544396] Code: e8 42 ff 69 f9 44 89 f6 48 c7 c7 a0 97 99 88 e8 9e 30 fb ff e9 72 e5 71 fa e8 29 ff 69 f9 48 c7 c7 80 9e 99 88 e8 88 30 fb ff <0f> 0b 41 bd fb ff ff ff e9 4a f3 71 fa e8 0b ff 69 f9 48 c7 c7 80 [ 33.563540] RSP: 0018:ffff888091ca7e10 EFLAGS: 00010286 [ 33.568889] RAX: 0000000000000024 RBX: 0000000000002000 RCX: 0000000000000000 [ 33.576141] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1012394fb4 [ 33.583410] RBP: 0000000004048000 R08: 0000000000000024 R09: 0000000000000000 [ 33.590667] R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880aad60cc0 [ 33.597922] R13: ffff88808ac42770 R14: 000000000000a000 R15: ffff8880aad60d38 [ 33.605191] ? vprintk_func+0x81/0x180 [ 33.609071] ovl_llseek+0xe5/0x340 [ 33.612605] ? do_sys_open+0x2bf/0x520 [ 33.616486] ? ovl_compat_ioctl+0x70/0x70 [ 33.620620] ? ovl_compat_ioctl+0x70/0x70 [ 33.624765] ksys_lseek+0x14f/0x1b0 [ 33.628386] do_syscall_64+0xf9/0x620 [ 33.632179] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.637350] RIP: 0033:0x7f14ca8ce109 [ 33.641049] 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 [ 33.659936] RSP: 002b:00007fff4039e9f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000008 [ 33.667717] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f14ca8ce109 [ 33.675162] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004 [ 33.682433] RBP: 00007f14ca8920f0 R08: 0000000000000000 R09: 0000000000000000 [ 33.689693] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f14ca892180 [ 33.696948] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 33.704590] Kernel Offset: disabled [ 33.708250] Rebooting in 86400 seconds..