[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.239' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.939280] ------------[ cut here ]------------ [ 36.944210] WARNING: CPU: 1 PID: 8108 at fs/inode.c:343 inc_nlink.cold+0x11/0x18 [ 36.951732] Kernel panic - not syncing: panic_on_warn set ... [ 36.951732] [ 36.959085] CPU: 1 PID: 8108 Comm: syz-executor377 Not tainted 4.19.211-syzkaller #0 [ 36.966946] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.976289] Call Trace: [ 36.978863] dump_stack+0x1fc/0x2ef [ 36.982473] panic+0x26a/0x50e [ 36.985650] ? __warn_printk+0xf3/0xf3 [ 36.989518] ? inc_nlink.cold+0x11/0x18 [ 36.993472] ? __probe_kernel_read+0x130/0x1b0 [ 36.998031] ? __warn.cold+0x5/0x5a [ 37.001634] ? __warn+0xe4/0x200 [ 37.004980] ? inc_nlink.cold+0x11/0x18 [ 37.008932] __warn.cold+0x20/0x5a [ 37.012452] ? inc_nlink.cold+0x11/0x18 [ 37.016407] report_bug+0x262/0x2b0 [ 37.020073] do_error_trap+0x1d7/0x310 [ 37.023956] ? math_error+0x310/0x310 [ 37.027791] ? __irq_work_queue_local+0x101/0x160 [ 37.032639] ? irq_work_queue+0x29/0x80 [ 37.036619] ? error_entry+0x72/0xd0 [ 37.040339] ? trace_hardirqs_off_caller+0x6e/0x210 [ 37.045431] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.050264] invalid_op+0x14/0x20 [ 37.053698] RIP: 0010:inc_nlink.cold+0x11/0x18 [ 37.058259] Code: c0 74 04 3c 03 7e 08 8b 5d 48 e9 e7 68 b4 f9 4c 89 e7 e8 aa 99 a3 f9 eb ee e8 43 bd 6d f9 48 c7 c7 80 b0 74 88 e8 a2 ee fe ff <0f> 0b e9 29 6a b4 f9 e8 2b bd 6d f9 48 8d 7b 40 b8 ff ff 37 00 48 [ 37.077162] RSP: 0018:ffff8880b0d8fc40 EFLAGS: 00010282 [ 37.082526] RAX: 0000000000000024 RBX: ffff88808df65040 RCX: 0000000000000000 [ 37.089775] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed10161b1f7a [ 37.097035] RBP: 0000000000000000 R08: 0000000000000024 R09: 0000000000000000 [ 37.104294] R10: 0000000000000005 R11: 0000000000000000 R12: ffff88808df65088 [ 37.111541] R13: 0000000000000000 R14: ffff8880b402e480 R15: 0000000000000000 [ 37.118797] ? vprintk_func+0x81/0x180 [ 37.122669] fuse_link+0x384/0x520 [ 37.126193] ? create_new_entry.constprop.0+0x6b0/0x6b0 [ 37.131545] vfs_link+0x7e6/0xc80 [ 37.134988] ? security_path_link+0xef/0x130 [ 37.139397] do_linkat+0x52a/0x810 [ 37.142916] ? __ia32_sys_symlink+0x70/0x70 [ 37.147218] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.152571] ? trace_hardirqs_off_caller+0x6e/0x210 [ 37.157567] __x64_sys_link+0x5d/0x80 [ 37.161356] do_syscall_64+0xf9/0x620 [ 37.165137] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.170326] RIP: 0033:0x7f40a88a9d29 [ 37.174028] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 81 14 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 37.192921] RSP: 002b:00007f40a883a2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000056 [ 37.200610] RAX: ffffffffffffffda RBX: 00007f40a893c4d0 RCX: 00007f40a88a9d29 [ 37.207954] RDX: 00007f40a88a9d29 RSI: 0000000020000080 RDI: 0000000020000040 [ 37.215214] RBP: 00007f40a890a0ec R08: 0000000000003065 R09: 0000000000000000 [ 37.222559] R10: 0000000000000030 R11: 0000000000000246 R12: 00007f40a89040d8 [ 37.229829] R13: 00007f40a89060e0 R14: 00007f40a89080e8 R15: 00007f40a893c4d8 [ 37.237378] Kernel Offset: disabled [ 37.241048] Rebooting in 86400 seconds..