[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 33.446427] audit: type=1800 audit(1538896990.749:25): pid=5624 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 33.470449] audit: type=1800 audit(1538896990.749:26): pid=5624 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 33.507708] audit: type=1800 audit(1538896990.749:27): pid=5624 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.0.10' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 46.290351] kasan: CONFIG_KASAN_INLINE enabled [ 46.295085] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 46.302612] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 46.308845] CPU: 0 PID: 5778 Comm: syz-executor142 Not tainted 4.19.0-rc6+ #48 [ 46.316182] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.325522] RIP: 0010:strlen+0x1f/0xa0 [ 46.329542] 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 [ 46.348439] RSP: 0018:ffff8801bb29f9b0 EFLAGS: 00010282 [ 46.353785] RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffff8801bb0de880 [ 46.361042] RDX: 0000000000000000 RSI: ffffffff81d2cccc RDI: 0000000000000000 [ 46.368298] RBP: ffff8801bb29f9c8 R08: ffff8801d86181c0 R09: ffffed0037b4b800 [ 46.375705] R10: 0000000000000000 R11: ffffffff8b04dd6b R12: 0000000000000000 [ 46.382975] R13: 0000000000000000 R14: ffffffff89f3ee98 R15: 0000000000000000 [ 46.390235] FS: 00000000018dc880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 46.398441] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.404302] CR2: 0000000020000000 CR3: 00000001d5501000 CR4: 00000000001406f0 [ 46.411554] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.418806] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.426055] Call Trace: [ 46.428630] getname_kernel+0x24/0x370 [ 46.432498] kern_path+0x1e/0x40 [ 46.435849] gfs2_mount_meta+0x85/0x2a0 [ 46.439802] ? init_sb+0xcc0/0xcc0 [ 46.443322] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.448843] mount_fs+0xae/0x31d [ 46.452195] vfs_kern_mount.part.35+0xdc/0x4f0 [ 46.456758] ? may_umount+0xb0/0xb0 [ 46.460366] ? _raw_read_unlock+0x2c/0x50 [ 46.464495] ? __get_fs_type+0x97/0xc0 [ 46.468452] do_mount+0x581/0x31f0 [ 46.471987] ? copy_mount_string+0x40/0x40 [ 46.476206] ? kasan_unpoison_shadow+0x35/0x50 [ 46.480766] ? kasan_kmalloc+0xc7/0xe0 [ 46.484639] ? kmem_cache_alloc_trace+0x31f/0x750 [ 46.489470] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 46.494997] ? _copy_from_user+0xdf/0x150 [ 46.499275] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.504799] ? copy_mount_options+0x288/0x380 [ 46.509286] ksys_mount+0x12d/0x140 [ 46.512925] __x64_sys_mount+0xbe/0x150 [ 46.516886] do_syscall_64+0x1b9/0x820 [ 46.520760] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 46.526108] ? syscall_return_slowpath+0x5e0/0x5e0 [ 46.531166] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.535993] ? trace_hardirqs_on_caller+0x310/0x310 [ 46.540992] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 46.546000] ? prepare_exit_to_usermode+0x291/0x3b0 [ 46.551058] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.555896] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.561333] RIP: 0033:0x440059 [ 46.564514] 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 [ 46.583403] RSP: 002b:00007ffd881923a8 EFLAGS: 00000217 ORIG_RAX: 00000000000000a5 [ 46.591230] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440059 [ 46.598485] RDX: 0000000020000040 RSI: 0000000020000080 RDI: 0000000000000000 [ 46.605740] RBP: 00000000006ca018 R08: 00000000200000c0 R09: 0000000000000000 [ 46.613431] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004018e0 [ 46.620690] R13: 0000000000401970 R14: 0000000000000000 R15: 0000000000000000 [ 46.627950] Modules linked in: [ 46.631523] ---[ end trace 2d6afb1cf0821a3e ]--- [ 46.636280] RIP: 0010:strlen+0x1f/0xa0 [ 46.640150] 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 [ 46.659283] RSP: 0018:ffff8801bb29f9b0 EFLAGS: 00010282 [ 46.664677] RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffff8801bb0de880 [ 46.672253] RDX: 0000000000000000 RSI: ffffffff81d2cccc RDI: 0000000000000000 [ 46.679511] RBP: ffff8801bb29f9c8 R08: ffff8801d86181c0 R09: ffffed0037b4b800 [ 46.686801] R10: 0000000000000000 R11: ffffffff8b04dd6b R12: 0000000000000000 [ 46.694153] R13: 0000000000000000 R14: ffffffff89f3ee98 R15: 0000000000000000 [ 46.701453] FS: 00000000018dc880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 46.709676] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.715631] CR2: 0000000020000000 CR3: 00000001d5501000 CR4: 00000000001406f0 [ 46.722939] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.730205] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.737509] Kernel panic - not syncing: Fatal exception [ 46.744039] Kernel Offset: disabled [ 46.747667] Rebooting in 86400 seconds..