[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 43.491286] kauditd_printk_skb: 9 callbacks suppressed [ 43.491302] audit: type=1400 audit(1538892227.398:35): avc: denied { map } for pid=5908 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.10.27' (ECDSA) to the list of known hosts. executing program [ 49.999950] audit: type=1400 audit(1538892233.908:36): avc: denied { map } for pid=5920 comm="syz-executor475" path="/root/syz-executor475161045" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 50.004060] kasan: CONFIG_KASAN_INLINE enabled [ 50.031022] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 50.038387] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 50.044640] CPU: 1 PID: 5920 Comm: syz-executor475 Not tainted 4.19.0-rc6+ #50 [ 50.051979] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.061356] RIP: 0010:strlen+0x1f/0xa0 [ 50.065235] 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 [ 50.084119] RSP: 0018:ffff8801c4fdf9b0 EFLAGS: 00010282 [ 50.089475] RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffff8801c34da9c0 [ 50.096722] RDX: 0000000000000000 RSI: ffffffff81d2cccc RDI: 0000000000000000 [ 50.103976] RBP: ffff8801c4fdf9c8 R08: ffff8801c4ad4000 R09: ffffed00399a1400 [ 50.111263] R10: 0000000000000000 R11: ffffffff8b05312b R12: 0000000000000000 [ 50.118543] R13: 0000000000000000 R14: ffffffff89f3ee98 R15: 0000000000000000 [ 50.125796] FS: 0000000000eed880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 50.134018] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 50.139881] CR2: 0000000020000000 CR3: 00000001cd433000 CR4: 00000000001406e0 [ 50.147149] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 50.154582] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 50.161833] Call Trace: [ 50.164409] getname_kernel+0x24/0x370 [ 50.168279] kern_path+0x1e/0x40 [ 50.171631] gfs2_mount_meta+0x85/0x2a0 [ 50.175586] ? init_sb+0xcc0/0xcc0 [ 50.179111] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.184644] mount_fs+0xae/0x31d [ 50.187998] vfs_kern_mount.part.35+0xdc/0x4f0 [ 50.192576] ? may_umount+0xb0/0xb0 [ 50.196187] ? _raw_read_unlock+0x2c/0x50 [ 50.200355] ? __get_fs_type+0x97/0xc0 [ 50.204230] do_mount+0x581/0x31f0 [ 50.207754] ? copy_mount_string+0x40/0x40 [ 50.211973] ? kasan_unpoison_shadow+0x35/0x50 [ 50.216538] ? kasan_kmalloc+0xc7/0xe0 [ 50.220413] ? kmem_cache_alloc_trace+0x31f/0x750 [ 50.225253] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 50.230775] ? _copy_from_user+0xdf/0x150 [ 50.234908] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.240427] ? copy_mount_options+0x288/0x380 [ 50.244901] ksys_mount+0x12d/0x140 [ 50.248511] __x64_sys_mount+0xbe/0x150 [ 50.252468] do_syscall_64+0x1b9/0x820 [ 50.256337] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 50.261683] ? syscall_return_slowpath+0x5e0/0x5e0 [ 50.266610] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.271441] ? trace_hardirqs_on_caller+0x310/0x310 [ 50.276452] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 50.281661] ? prepare_exit_to_usermode+0x291/0x3b0 [ 50.286659] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.291533] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.296711] RIP: 0033:0x440059 [ 50.299894] 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 [ 50.318796] RSP: 002b:00007ffe2cdb0958 EFLAGS: 00000217 ORIG_RAX: 00000000000000a5 [ 50.326484] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440059 [ 50.333751] RDX: 0000000020000040 RSI: 0000000020000080 RDI: 0000000000000000 [ 50.341002] RBP: 00000000006ca018 R08: 00000000200000c0 R09: 0000000000000000 [ 50.348253] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004018e0 [ 50.355503] R13: 0000000000401970 R14: 0000000000000000 R15: 0000000000000000 [ 50.362756] Modules linked in: [ 50.366510] ---[ end trace af6e8bd92a77b105 ]--- [ 50.371328] RIP: 0010:strlen+0x1f/0xa0 [ 50.375229] 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 [ 50.394253] RSP: 0018:ffff8801c4fdf9b0 EFLAGS: 00010282 [ 50.399669] RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffff8801c34da9c0 [ 50.406955] RDX: 0000000000000000 RSI: ffffffff81d2cccc RDI: 0000000000000000 [ 50.414278] RBP: ffff8801c4fdf9c8 R08: ffff8801c4ad4000 R09: ffffed00399a1400 [ 50.421601] R10: 0000000000000000 R11: ffffffff8b05312b R12: 0000000000000000 [ 50.428946] R13: 0000000000000000 R14: ffffffff89f3ee98 R15: 0000000000000000 [ 50.436230] FS: 0000000000eed880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 50.444485] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 50.450393] CR2: 0000000020000000 CR3: 00000001cd433000 CR4: 00000000001406e0 [ 50.457650] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 50.464935] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 50.472226] Kernel panic - not syncing: Fatal exception [ 50.478554] Kernel Offset: disabled [ 50.482195] Rebooting in 86400 seconds..