[ 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 '10.128.0.111' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.361260] ------------[ cut here ]------------ [ 37.366182] WARNING: CPU: 0 PID: 8094 at fs/inode.c:343 inc_nlink.cold+0x11/0x18 [ 37.373704] Kernel panic - not syncing: panic_on_warn set ... [ 37.373704] [ 37.381064] CPU: 0 PID: 8094 Comm: syz-executor120 Not tainted 4.19.211-syzkaller #0 [ 37.388931] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.398284] Call Trace: [ 37.400867] dump_stack+0x1fc/0x2ef [ 37.404485] panic+0x26a/0x50e [ 37.407664] ? __warn_printk+0xf3/0xf3 [ 37.411542] ? inc_nlink.cold+0x11/0x18 [ 37.415503] ? __probe_kernel_read+0x130/0x1b0 [ 37.420069] ? __warn.cold+0x5/0x5a [ 37.423684] ? __warn+0xe4/0x200 [ 37.427042] ? inc_nlink.cold+0x11/0x18 [ 37.431001] __warn.cold+0x20/0x5a [ 37.434523] ? inc_nlink.cold+0x11/0x18 [ 37.438478] report_bug+0x262/0x2b0 [ 37.442088] do_error_trap+0x1d7/0x310 [ 37.445956] ? math_error+0x310/0x310 [ 37.449739] ? __irq_work_queue_local+0x101/0x160 [ 37.454581] ? irq_work_queue+0x29/0x80 [ 37.458549] ? error_entry+0x72/0xd0 [ 37.462251] ? trace_hardirqs_off_caller+0x6e/0x210 [ 37.467255] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.472089] invalid_op+0x14/0x20 [ 37.475530] RIP: 0010:inc_nlink.cold+0x11/0x18 [ 37.480097] 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 [ 37.498985] RSP: 0018:ffff8880a67dfc40 EFLAGS: 00010282 [ 37.504331] RAX: 0000000000000024 RBX: ffff88808dbf3040 RCX: 0000000000000000 [ 37.511583] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1014cfbf7a [ 37.518831] RBP: 0000000000000000 R08: 0000000000000024 R09: 0000000000000000 [ 37.526083] R10: 0000000000000005 R11: 0000000000000000 R12: ffff88808dbf3088 [ 37.533336] R13: 0000000000000000 R14: ffff8880b30acdc0 R15: 0000000000000000 [ 37.540599] ? vprintk_func+0x81/0x180 [ 37.544473] fuse_link+0x384/0x520 [ 37.548001] ? create_new_entry.constprop.0+0x6b0/0x6b0 [ 37.553359] vfs_link+0x7e6/0xc80 [ 37.556797] ? security_path_link+0xef/0x130 [ 37.561187] do_linkat+0x52a/0x810 [ 37.564717] ? __ia32_sys_symlink+0x70/0x70 [ 37.569026] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.574371] ? trace_hardirqs_off_caller+0x6e/0x210 [ 37.579386] __x64_sys_link+0x5d/0x80 [ 37.583174] do_syscall_64+0xf9/0x620 [ 37.586964] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.592138] RIP: 0033:0x7fa74d6dfd29 [ 37.595833] 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 [ 37.614715] RSP: 002b:00007fa74d6702f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000056 [ 37.622421] RAX: ffffffffffffffda RBX: 00007fa74d7724d0 RCX: 00007fa74d6dfd29 [ 37.629670] RDX: 00007fa74d6dfd29 RSI: 0000000020000080 RDI: 0000000020000040 [ 37.636921] RBP: 00007fa74d7400ec R08: 0000000000003065 R09: 0000000000000000 [ 37.644190] R10: 0000000000000030 R11: 0000000000000246 R12: 00007fa74d73a0d8 [ 37.653176] R13: 00007fa74d73c0e0 R14: 00007fa74d73e0e8 R15: 00007fa74d7724d8 [ 37.660723] Kernel Offset: disabled [ 37.664383] Rebooting in 86400 seconds..