[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 38.166698] audit: type=1800 audit(1538889566.959:25): pid=5676 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 38.194187] audit: type=1800 audit(1538889566.959:26): pid=5676 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 38.232668] audit: type=1800 audit(1538889566.959:27): pid=5676 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.3' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 50.118381] kasan: CONFIG_KASAN_INLINE enabled [ 50.122995] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 50.130392] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 50.136626] CPU: 1 PID: 5829 Comm: syz-executor215 Not tainted 4.19.0-rc6+ #271 [ 50.144196] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.153544] RIP: 0010:strlen+0x1f/0xa0 [ 50.157414] Code: ff ff ff 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 fa 48 89 e5 48 c1 ea 03 41 54 49 89 fc 53 48 83 ec 08 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 4d 41 80 3c 24 [ 50.176296] RSP: 0018:ffff8801bc30f9b0 EFLAGS: 00010282 [ 50.181642] RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffff8801bc74eec0 [ 50.189074] RDX: 0000000000000000 RSI: ffffffff81d2cccc RDI: 0000000000000000 [ 50.196323] RBP: ffff8801bc30f9c8 R08: ffff8801d7c24400 R09: ffffed003af0a800 [ 50.203573] R10: fffff94000ebc2a6 R11: ffffea00075e1537 R12: 0000000000000000 [ 50.210822] R13: 0000000000000000 R14: ffffffff89f3ee98 R15: 0000000000000000 [ 50.218076] FS: 0000000001f11880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 50.226283] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 50.232143] CR2: 0000000020000000 CR3: 00000001d7cc6000 CR4: 00000000001406e0 [ 50.239395] Call Trace: [ 50.241967] getname_kernel+0x24/0x370 [ 50.245850] kern_path+0x1e/0x40 [ 50.249220] gfs2_mount_meta+0x85/0x2a0 [ 50.253190] ? init_sb+0xcc0/0xcc0 [ 50.256728] ? alloc_pages_current+0x114/0x210 [ 50.261295] mount_fs+0xae/0x31d [ 50.264644] vfs_kern_mount.part.35+0xdc/0x4f0 [ 50.269209] ? may_umount+0xb0/0xb0 [ 50.272819] ? _raw_read_unlock+0x2c/0x50 [ 50.276967] ? __get_fs_type+0x97/0xc0 [ 50.280852] do_mount+0x581/0x31f0 [ 50.284381] ? copy_mount_string+0x40/0x40 [ 50.288600] ? kasan_unpoison_shadow+0x35/0x50 [ 50.293180] ? kasan_kmalloc+0xc7/0xe0 [ 50.297057] ? kmem_cache_alloc_trace+0x31f/0x750 [ 50.302310] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 50.307844] ? _copy_from_user+0xdf/0x150 [ 50.311975] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.317496] ? copy_mount_options+0x288/0x380 [ 50.321980] ksys_mount+0x12d/0x140 [ 50.325588] __x64_sys_mount+0xbe/0x150 [ 50.329546] do_syscall_64+0x1b9/0x820 [ 50.333429] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 50.338774] ? syscall_return_slowpath+0x5e0/0x5e0 [ 50.343681] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.348507] ? trace_hardirqs_on_caller+0x310/0x310 [ 50.353514] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 50.358546] ? prepare_exit_to_usermode+0x291/0x3b0 [ 50.363548] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.368380] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.373552] RIP: 0033:0x440059 [ 50.376728] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 50.395612] RSP: 002b:00007ffe32cedb58 EFLAGS: 00000217 ORIG_RAX: 00000000000000a5 [ 50.403302] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440059 [ 50.410574] RDX: 0000000020000040 RSI: 0000000020000080 RDI: 0000000000000000 [ 50.417826] RBP: 00000000006ca018 R08: 00000000200000c0 R09: 0000000000000000 [ 50.425075] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004018e0 [ 50.432335] R13: 0000000000401970 R14: 0000000000000000 R15: 0000000000000000 [ 50.439594] Modules linked in: [ 50.443360] ---[ end trace e8236b178a90d827 ]--- [ 50.448150] RIP: 0010:strlen+0x1f/0xa0 [ 50.452027] Code: ff ff ff 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 fa 48 89 e5 48 c1 ea 03 41 54 49 89 fc 53 48 83 ec 08 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 4d 41 80 3c 24 [ 50.471009] RSP: 0018:ffff8801bc30f9b0 EFLAGS: 00010282 [ 50.476555] RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffff8801bc74eec0 [ 50.483812] RDX: 0000000000000000 RSI: ffffffff81d2cccc RDI: 0000000000000000 [ 50.491346] RBP: ffff8801bc30f9c8 R08: ffff8801d7c24400 R09: ffffed003af0a800 [ 50.498664] R10: fffff94000ebc2a6 R11: ffffea00075e1537 R12: 0000000000000000 [ 50.505988] R13: 0000000000000000 R14: ffffffff89f3ee98 R15: 0000000000000000 [ 50.513287] FS: 0000000001f11880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 50.521580] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 50.527524] CR2: 0000000020000000 CR3: 00000001d7cc6000 CR4: 00000000001406e0 [ 50.534797] Kernel panic - not syncing: Fatal exception [ 50.541105] Kernel Offset: disabled [ 50.544726] Rebooting in 86400 seconds..