[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Serial Getty on ttyS0. [ 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 '10.128.1.122' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 27.342613] overlayfs: fs on './file0' does not support file handles, falling back to index=off. [ 27.355466] audit: type=1804 audit(1658546320.925:2): pid=7957 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor416" name="/root/bus/bus/file0" dev="sda1" ino=13863 res=1 [ 27.368147] ------------[ cut here ]------------ [ 27.379460] WARNING: CPU: 0 PID: 7957 at fs/inode.c:285 drop_nlink+0x7d/0xd0 [ 27.386632] Kernel panic - not syncing: panic_on_warn set ... [ 27.386632] [ 27.393985] CPU: 0 PID: 7957 Comm: syz-executor416 Not tainted 4.14.289-syzkaller #0 [ 27.401856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 [ 27.411190] Call Trace: [ 27.413762] dump_stack+0x1b2/0x281 [ 27.417372] panic+0x1f9/0x42d [ 27.420540] ? add_taint.cold+0x16/0x16 [ 27.424493] ? drop_nlink+0x7d/0xd0 [ 27.428105] ? drop_nlink+0x7d/0xd0 [ 27.431706] __warn.cold+0x20/0x44 [ 27.435224] ? ist_end_non_atomic+0x10/0x10 [ 27.439699] ? drop_nlink+0x7d/0xd0 [ 27.443302] report_bug+0x208/0x250 [ 27.446945] do_error_trap+0x195/0x2d0 [ 27.450820] ? math_error+0x2d0/0x2d0 [ 27.454601] ? dput.part.0+0x27/0x710 [ 27.458380] ? dput.part.0+0x164/0x710 [ 27.462255] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.467087] invalid_op+0x1b/0x40 [ 27.470520] RIP: 0010:drop_nlink+0x7d/0xd0 [ 27.474735] RSP: 0018:ffff888091137b48 EFLAGS: 00010297 [ 27.480074] RAX: ffff888097784180 RBX: ffff88808df250a0 RCX: 0000000000000002 [ 27.487333] RDX: 0000000000000000 RSI: 0000000000000800 RDI: ffff88808df250a0 [ 27.494579] RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000 [ 27.501830] R10: 0000000008000080 R11: ffff888097784180 R12: ffff88808df250e8 [ 27.509081] R13: 1ffff11012226f7c R14: 0000000000000000 R15: 0000000000000000 [ 27.516343] ? drop_nlink+0x7d/0xd0 [ 27.519949] ovl_rename+0xc15/0xe50 [ 27.523556] ? ovl_check_empty_and_clear+0xe0/0xe0 [ 27.528471] ? down_write_nested+0x36/0x90 [ 27.532693] vfs_rename+0x560/0x1820 [ 27.536398] ? path_openat+0x2970/0x2970 [ 27.540452] ? security_path_rename+0x13f/0x2a0 [ 27.545102] SyS_renameat2+0x95b/0xad0 [ 27.548971] ? SyS_link+0x30/0x30 [ 27.552402] ? mntput+0x5c/0x80 [ 27.555681] ? SyS_chdir+0x10d/0x1a0 [ 27.559456] ? SyS_access+0x20/0x20 [ 27.563059] ? do_syscall_64+0x4c/0x640 [ 27.567008] ? SyS_renameat+0x30/0x30 [ 27.570798] do_syscall_64+0x1d5/0x640 [ 27.574674] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 27.579844] RIP: 0033:0x7f81c53751d9 [ 27.583534] RSP: 002b:00007fffb78b3ad8 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 [ 27.591230] RAX: ffffffffffffffda RBX: 69662f7375622f2e RCX: 00007f81c53751d9 [ 27.598562] RDX: 00007f81c53751d9 RSI: 0000000020000380 RDI: 00000000200002c0 [ 27.605805] RBP: 0030656c69662f2e R08: 0000000000000000 R09: 0000000000000000 [ 27.613048] R10: 0000000000000000 R11: 0000000000000246 R12: 0079616c7265766f [ 27.620293] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 27.627827] Kernel Offset: disabled [ 27.631482] Rebooting in 86400 seconds..