[ 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 '10.128.0.149' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 56.157116][ T7068] ------------[ cut here ]------------ [ 56.162774][ T7068] WARNING: CPU: 0 PID: 7068 at fs/overlayfs/file.c:66 ovl_real_fdget_meta+0x597/0x640 [ 56.172567][ T7068] Kernel panic - not syncing: panic_on_warn set ... [ 56.179162][ T7068] CPU: 0 PID: 7068 Comm: syz-executor923 Not tainted 5.7.0-rc2-syzkaller #0 [ 56.187913][ T7068] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.197972][ T7068] Call Trace: [ 56.201246][ T7068] dump_stack+0x1e9/0x30e [ 56.205571][ T7068] panic+0x264/0x7a0 [ 56.209441][ T7068] ? __warn+0x102/0x210 [ 56.213575][ T7068] ? ovl_real_fdget_meta+0x597/0x640 [ 56.218881][ T7068] __warn+0x209/0x210 [ 56.222994][ T7068] ? ovl_real_fdget_meta+0x597/0x640 [ 56.228312][ T7068] report_bug+0x1ac/0x2d0 [ 56.232642][ T7068] do_error_trap+0xca/0x1c0 [ 56.237152][ T7068] do_invalid_op+0x32/0x40 [ 56.241720][ T7068] ? ovl_real_fdget_meta+0x597/0x640 [ 56.247248][ T7068] invalid_op+0x23/0x30 [ 56.251923][ T7068] RIP: 0010:ovl_real_fdget_meta+0x597/0x640 [ 56.257941][ T7068] Code: ff df e9 f2 fb ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 03 fc ff ff 4c 89 e7 e8 23 78 2a ff e9 f6 fb ff ff e8 19 9a ec fe <0f> 0b 41 bd fb ff ff ff e9 11 fc ff ff 48 8b 4c 24 10 80 e1 07 80 [ 56.279467][ T7068] RSP: 0018:ffffc90001087c70 EFLAGS: 00010293 [ 56.285531][ T7068] RAX: ffffffff8286c777 RBX: 0000000004042000 RCX: ffff8880a95d00c0 [ 56.293477][ T7068] RDX: 0000000000000000 RSI: 0000000000002000 RDI: 0000000000000000 [ 56.301432][ T7068] RBP: 000000000002a002 R08: ffffffff8286c4db R09: ffffed10149d0c21 [ 56.309392][ T7068] R10: ffffed10149d0c21 R11: 0000000000000000 R12: ffff8880a8852580 [ 56.317359][ T7068] R13: 0000000000000000 R14: 0000000000002000 R15: 1ffff1101510a4b0 [ 56.325328][ T7068] ? ovl_real_fdget_meta+0x2fb/0x640 [ 56.330585][ T7068] ? ovl_real_fdget_meta+0x597/0x640 [ 56.336139][ T7068] ovl_write_iter+0x26d/0xdf0 [ 56.342595][ T7068] __vfs_write+0x54c/0x710 [ 56.347573][ T7068] vfs_write+0x274/0x580 [ 56.352127][ T7068] ksys_write+0x11b/0x220 [ 56.356481][ T7068] do_syscall_64+0xf3/0x1b0 [ 56.361432][ T7068] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 56.367567][ T7068] RIP: 0033:0x440409 [ 56.371727][ T7068] Code: 23 02 00 85 c0 b8 00 00 00 00 48 0f 44 c3 5b c3 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 9b 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 56.391621][ T7068] RSP: 002b:00007ffd74433278 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 56.400029][ T7068] RAX: ffffffffffffffda RBX: 00007ffd74433280 RCX: 0000000000440409 [ 56.408013][ T7068] RDX: 0000000000000001 RSI: 0000000020000340 RDI: 0000000000000003 [ 56.415966][ T7068] RBP: 00000000006cb018 R08: 6c616b7a79732f2e R09: 6c616b7a79732f2e [ 56.423950][ T7068] R10: 6c616b7a79732f2e R11: 0000000000000246 R12: 0000000000401c30 [ 56.431916][ T7068] R13: 0000000000401cc0 R14: 0000000000000000 R15: 0000000000000000 [ 56.441234][ T7068] Kernel Offset: disabled [ 56.445614][ T7068] Rebooting in 86400 seconds..