[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 31.413231] audit: type=1800 audit(1538892773.950:25): pid=5614 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 31.437699] audit: type=1800 audit(1538892773.960:26): pid=5614 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 31.466186] audit: type=1800 audit(1538892773.960:27): pid=5614 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 '10.128.10.8' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.215411] kasan: CONFIG_KASAN_INLINE enabled [ 42.220027] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 42.227495] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 42.233729] CPU: 0 PID: 5766 Comm: syz-executor289 Not tainted 4.19.0-rc6+ #271 [ 42.241169] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.250519] RIP: 0010:strlen+0x1f/0xa0 [ 42.254387] 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 [ 42.273267] RSP: 0018:ffff8801c3c479b0 EFLAGS: 00010282 [ 42.278609] RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffff8801d8182580 [ 42.285858] RDX: 0000000000000000 RSI: ffffffff81d2cccc RDI: 0000000000000000 [ 42.293108] RBP: ffff8801c3c479c8 R08: ffff8801d79e2080 R09: ffffed003af26c00 [ 42.300357] R10: fffff94000ebc9b6 R11: ffffea00075e4db7 R12: 0000000000000000 [ 42.307606] R13: 0000000000000000 R14: ffffffff89f3ee98 R15: 0000000000000000 [ 42.314858] FS: 0000000001c56880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 42.323063] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.328923] CR2: 0000000020000000 CR3: 00000001bc785000 CR4: 00000000001406f0 [ 42.336191] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.343445] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.350697] Call Trace: [ 42.353270] getname_kernel+0x24/0x370 [ 42.357136] kern_path+0x1e/0x40 [ 42.360487] gfs2_mount_meta+0x85/0x2a0 [ 42.364450] ? init_sb+0xcc0/0xcc0 [ 42.367970] ? alloc_pages_current+0x114/0x210 [ 42.372531] mount_fs+0xae/0x31d [ 42.375880] vfs_kern_mount.part.35+0xdc/0x4f0 [ 42.380497] ? may_umount+0xb0/0xb0 [ 42.384114] ? _raw_read_unlock+0x2c/0x50 [ 42.388247] ? __get_fs_type+0x97/0xc0 [ 42.392204] do_mount+0x581/0x31f0 [ 42.395726] ? copy_mount_string+0x40/0x40 [ 42.399941] ? kasan_unpoison_shadow+0x35/0x50 [ 42.404504] ? kasan_kmalloc+0xc7/0xe0 [ 42.408388] ? kmem_cache_alloc_trace+0x31f/0x750 [ 42.413215] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 42.418735] ? _copy_from_user+0xdf/0x150 [ 42.422866] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.428390] ? copy_mount_options+0x288/0x380 [ 42.432872] ksys_mount+0x12d/0x140 [ 42.436484] __x64_sys_mount+0xbe/0x150 [ 42.440449] do_syscall_64+0x1b9/0x820 [ 42.444323] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 42.449682] ? syscall_return_slowpath+0x5e0/0x5e0 [ 42.454623] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.459503] ? trace_hardirqs_on_caller+0x310/0x310 [ 42.464510] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 42.469512] ? prepare_exit_to_usermode+0x291/0x3b0 [ 42.474517] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.479351] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.484539] RIP: 0033:0x440059 [ 42.487723] 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 [ 42.506787] RSP: 002b:00007ffdb25841b8 EFLAGS: 00000217 ORIG_RAX: 00000000000000a5 [ 42.514504] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440059 [ 42.521863] RDX: 0000000020000040 RSI: 0000000020000080 RDI: 0000000000000000 [ 42.529121] RBP: 00000000006ca018 R08: 00000000200000c0 R09: 0000000000000000 [ 42.536385] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004018e0 [ 42.543649] R13: 0000000000401970 R14: 0000000000000000 R15: 0000000000000000 [ 42.550910] Modules linked in: [ 42.554439] ---[ end trace 2b01186f037f7e7b ]--- [ 42.559197] RIP: 0010:strlen+0x1f/0xa0 [ 42.563068] 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 [ 42.582363] RSP: 0018:ffff8801c3c479b0 EFLAGS: 00010282 [ 42.587771] RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffff8801d8182580 [ 42.595229] RDX: 0000000000000000 RSI: ffffffff81d2cccc RDI: 0000000000000000 [ 42.602485] RBP: ffff8801c3c479c8 R08: ffff8801d79e2080 R09: ffffed003af26c00 [ 42.609794] R10: fffff94000ebc9b6 R11: ffffea00075e4db7 R12: 0000000000000000 [ 42.617123] R13: 0000000000000000 R14: ffffffff89f3ee98 R15: 0000000000000000 [ 42.624450] FS: 0000000001c56880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 42.632660] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.638620] CR2: 0000000020000000 CR3: 00000001bc785000 CR4: 00000000001406f0 [ 42.645992] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.653301] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.660732] Kernel panic - not syncing: Fatal exception [ 42.667033] Kernel Offset: disabled [ 42.670656] Rebooting in 86400 seconds..