[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ 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 '10.128.0.252' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 32.325650] ------------[ cut here ]------------ [ 32.330736] WARNING: CPU: 0 PID: 8104 at fs/overlayfs/file.c:60 ovl_real_fdget_meta.cold+0x11/0x1e [ 32.339828] Kernel panic - not syncing: panic_on_warn set ... [ 32.339828] [ 32.347170] CPU: 0 PID: 8104 Comm: syz-executor379 Not tainted 4.19.211-syzkaller #0 [ 32.355023] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 [ 32.364353] Call Trace: [ 32.366944] dump_stack+0x1fc/0x2ef [ 32.370552] panic+0x26a/0x50e [ 32.373723] ? __warn_printk+0xf3/0xf3 [ 32.377592] ? ovl_real_fdget_meta.cold+0x11/0x1e [ 32.382414] ? __probe_kernel_read+0x130/0x1b0 [ 32.386970] ? __warn.cold+0x5/0x5a [ 32.390574] ? __warn+0xe4/0x200 [ 32.393919] ? ovl_real_fdget_meta.cold+0x11/0x1e [ 32.398769] __warn.cold+0x20/0x5a [ 32.402290] ? ovl_real_fdget_meta.cold+0x11/0x1e [ 32.407110] report_bug+0x262/0x2b0 [ 32.410719] do_error_trap+0x1d7/0x310 [ 32.414585] ? math_error+0x310/0x310 [ 32.418364] ? __irq_work_queue_local+0x101/0x160 [ 32.423186] ? irq_work_queue+0x29/0x80 [ 32.427138] ? error_entry+0x72/0xd0 [ 32.430831] ? trace_hardirqs_off_caller+0x6e/0x210 [ 32.435825] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.440650] invalid_op+0x14/0x20 [ 32.444082] RIP: 0010:ovl_real_fdget_meta.cold+0x11/0x1e [ 32.449525] 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 [ 32.468402] RSP: 0018:ffff88808ae5fc00 EFLAGS: 00010282 [ 32.473748] RAX: 0000000000000024 RBX: 0000000000002000 RCX: 0000000000000000 [ 32.481004] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed10115cbf72 [ 32.488258] RBP: 0000000004048000 R08: 0000000000000024 R09: 0000000000000000 [ 32.495509] R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880b4341040 [ 32.502756] R13: ffff88808b0507f0 R14: 000000000000a000 R15: ffff8880b43410b8 [ 32.510015] ? vprintk_func+0x81/0x180 [ 32.513888] ovl_read_iter+0x103/0x320 [ 32.517757] ? ovl_mmap+0x2e0/0x2e0 [ 32.521371] __vfs_read+0x518/0x750 [ 32.524982] ? __se_sys_copy_file_range+0x410/0x410 [ 32.529983] ? security_file_permission+0x1c0/0x220 [ 32.534992] vfs_read+0x194/0x3c0 [ 32.538431] ksys_read+0x12b/0x2a0 [ 32.541951] ? kernel_write+0x110/0x110 [ 32.545904] ? trace_hardirqs_off_caller+0x6e/0x210 [ 32.550911] ? do_syscall_64+0x21/0x620 [ 32.554869] do_syscall_64+0xf9/0x620 [ 32.558656] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 32.563832] RIP: 0033:0x7f4308273159 [ 32.567615] 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 [ 32.586494] RSP: 002b:00007fff2d8c2ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 32.594182] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f4308273159 [ 32.601430] RDX: 0000000000002020 RSI: 0000000020000300 RDI: 0000000000000004 [ 32.608682] RBP: 00007f4308237140 R08: 0000000000000000 R09: 0000000000000000 [ 32.616019] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f43082371d0 [ 32.623271] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 32.630788] Kernel Offset: disabled [ 32.634447] Rebooting in 86400 seconds..