[ 36.932693] audit: type=1800 audit(1538890546.043:24): pid=5691 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="sudo" dev="sda1" ino=2454 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 37.349827] audit: type=1800 audit(1538890546.533:25): pid=5691 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 37.369099] audit: type=1800 audit(1538890546.533:26): pid=5691 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 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 '10.128.10.29' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 47.839380] kasan: CONFIG_KASAN_INLINE enabled [ 47.843987] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 47.851395] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 47.857634] CPU: 1 PID: 5844 Comm: syz-executor783 Not tainted 4.19.0-rc6+ #174 [ 47.865064] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.874413] RIP: 0010:strlen+0x1f/0xa0 [ 47.878289] 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 [ 47.897184] RSP: 0018:ffff8801c56d7978 EFLAGS: 00010296 [ 47.902534] RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffff8801d756a140 [ 47.909786] RDX: 0000000000000000 RSI: ffffffff81d2cccc RDI: 0000000000000000 [ 47.917041] RBP: ffff8801c56d7990 R08: ffff8801c1de01c0 R09: ffffed00389ab000 [ 47.924293] R10: fffff94000e26ac6 R11: ffffea0007135637 R12: 0000000000000000 [ 47.931545] R13: 0000000000000000 R14: ffffffff89f3ee98 R15: 0000000000000000 [ 47.938801] FS: 0000000000000000(0000) GS:ffff8801daf00000(0063) knlGS:0000000009cd5840 [ 47.947010] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 47.952875] CR2: 0000000020000000 CR3: 00000001d76cf000 CR4: 00000000001406e0 [ 47.960129] Call Trace: [ 47.962881] getname_kernel+0x24/0x370 [ 47.966772] kern_path+0x1e/0x40 [ 47.970128] gfs2_mount_meta+0x85/0x2a0 [ 47.974099] ? init_sb+0xcc0/0xcc0 [ 47.977626] ? alloc_pages_current+0x114/0x210 [ 47.982199] mount_fs+0xae/0x31d [ 47.985556] vfs_kern_mount.part.35+0xdc/0x4f0 [ 47.990140] ? may_umount+0xb0/0xb0 [ 47.993753] ? _raw_read_unlock+0x2c/0x50 [ 47.997885] ? __get_fs_type+0x97/0xc0 [ 48.002107] do_mount+0x581/0x31f0 [ 48.006598] ? copy_mount_string+0x40/0x40 [ 48.011163] ? usercopy_warn+0x110/0x110 [ 48.015214] ? kasan_unpoison_shadow+0x35/0x50 [ 48.019789] ? kasan_kmalloc+0xc7/0xe0 [ 48.023665] ? kmem_cache_alloc_trace+0x31f/0x750 [ 48.028493] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 48.034538] ? _copy_from_user+0xdf/0x150 [ 48.038964] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.044488] ? copy_mount_options+0x288/0x380 [ 48.048972] __ia32_compat_sys_mount+0x5d5/0x860 [ 48.053716] do_fast_syscall_32+0x34d/0xfb2 [ 48.058028] ? do_int80_syscall_32+0x890/0x890 [ 48.062599] ? entry_SYSENTER_compat+0x68/0x7f [ 48.067174] ? trace_hardirqs_off_caller+0xbb/0x310 [ 48.072183] ? syscall_return_slowpath+0x5e0/0x5e0 [ 48.077104] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.081941] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.086775] ? trace_hardirqs_on_caller+0x310/0x310 [ 48.091782] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 48.096787] ? prepare_exit_to_usermode+0x291/0x3b0 [ 48.101793] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.106627] entry_SYSENTER_compat+0x70/0x7f [ 48.111024] RIP: 0023:0xf7f12ca9 [ 48.114375] Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 0c 24 c3 8b 1c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 48.133267] RSP: 002b:00000000ffb5b27c EFLAGS: 00000286 ORIG_RAX: 0000000000000015 [ 48.140969] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000020000080 [ 48.148229] RDX: 0000000020000040 RSI: 0000000000000000 RDI: 00000000200000c0 [ 48.155515] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 48.162774] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 48.170031] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 48.177289] Modules linked in: [ 48.181152] ---[ end trace 2744dcf12f71555c ]--- [ 48.186010] RIP: 0010:strlen+0x1f/0xa0 [ 48.189925] 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 [ 48.210762] RSP: 0018:ffff8801c56d7978 EFLAGS: 00010296 [ 48.216337] RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffff8801d756a140 [ 48.223597] RDX: 0000000000000000 RSI: ffffffff81d2cccc RDI: 0000000000000000 [ 48.230923] RBP: ffff8801c56d7990 R08: ffff8801c1de01c0 R09: ffffed00389ab000 [ 48.238252] R10: fffff94000e26ac6 R11: ffffea0007135637 R12: 0000000000000000 [ 48.245519] R13: 0000000000000000 R14: ffffffff89f3ee98 R15: 0000000000000000 [ 48.252831] FS: 0000000000000000(0000) GS:ffff8801daf00000(0063) knlGS:0000000009cd5840 [ 48.261100] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 48.267014] CR2: 0000000020000000 CR3: 00000001d76cf000 CR4: 00000000001406e0 [ 48.274287] Kernel panic - not syncing: Fatal exception [ 48.280516] Kernel Offset: disabled [ 48.284141] Rebooting in 86400 seconds..