[ 46.835352] audit: type=1800 audit(1546354823.348:29): pid=8160 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 46.857532] audit: type=1800 audit(1546354823.348:30): pid=8160 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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 Warning: Permanently added '10.128.0.39' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 68.235567] kauditd_printk_skb: 5 callbacks suppressed [ 68.235584] audit: type=1400 audit(1546354844.748:36): avc: denied { map } for pid=8348 comm="syz-executor246" path="/root/syz-executor246550111" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 68.951537] kasan: CONFIG_KASAN_INLINE enabled [ 68.956962] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 68.964368] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 68.970596] CPU: 1 PID: 8848 Comm: syz-executor246 Not tainted 4.20.0+ #3 [ 68.977499] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.986856] RIP: 0010:keyctl_pkey_params_get+0x284/0x550 [ 68.992303] Code: fe 48 8b 44 24 38 48 c1 e8 03 42 80 3c 28 00 0f 85 41 02 00 00 4c 8b b4 24 b0 00 00 00 4c 89 f0 4c 89 f2 48 c1 e8 03 83 e2 07 <42> 0f b6 04 28 38 d0 7f 08 84 c0 0f 85 2a 02 00 00 41 0f b6 36 31 [ 69.011200] RSP: 0018:ffff888077d67bd0 EFLAGS: 00010246 [ 69.016554] RAX: 0000000000000000 RBX: ffff888077d67d90 RCX: ffffffff834376dd [ 69.023877] RDX: 0000000000000000 RSI: ffffffff834376eb RDI: 0000000000000001 [ 69.031137] RBP: ffff888077d67d20 R08: ffff8880777da380 R09: ffffed10137ad3e1 [ 69.038394] R10: ffffed10137ad3e0 R11: 0000000000000005 R12: 0000000000000000 [ 69.045644] R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 [ 69.052899] FS: 00007f451b306700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 69.061106] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.066973] CR2: 0000000020000200 CR3: 00000000a03ba000 CR4: 00000000001406e0 [ 69.074237] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.081567] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.088821] Call Trace: [ 69.091426] ? __keyctl_dh_compute.cold+0x63/0x63 [ 69.096257] ? lock_downgrade+0x910/0x910 [ 69.100388] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 69.105127] ? lockdep_hardirqs_on+0x415/0x5d0 [ 69.109889] ? retint_kernel+0x2d/0x2d [ 69.113777] ? trace_hardirqs_on_caller+0xc0/0x310 [ 69.118688] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 69.123428] keyctl_pkey_query+0xb8/0x2a0 [ 69.127560] ? keyctl_pkey_params_get_2+0x570/0x570 [ 69.132560] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 69.137298] ? retint_kernel+0x2d/0x2d [ 69.141169] __x64_sys_keyctl+0x144/0x420 [ 69.145387] do_syscall_64+0x1a3/0x800 [ 69.149263] ? syscall_return_slowpath+0x5f0/0x5f0 [ 69.154173] ? prepare_exit_to_usermode+0x232/0x3b0 [ 69.159174] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 69.164003] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.169174] RIP: 0033:0x4462c9 [ 69.172355] Code: e8 1c b4 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 2b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 69.191355] RSP: 002b:00007f451b305ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa [ 69.199047] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 00000000004462c9 [ 69.206298] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000018 [ 69.213552] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 69.220805] R10: 0000000020000200 R11: 0000000000000246 R12: 00000000006dbc2c [ 69.228054] R13: 00007ffd1d8380ff R14: 00007f451b3069c0 R15: 0000000000000000 [ 69.235314] Modules linked in: [ 69.238596] ---[ end trace f1aa75694a590ccb ]--- [ 69.243364] RIP: 0010:keyctl_pkey_params_get+0x284/0x550 [ 69.249139] Code: fe 48 8b 44 24 38 48 c1 e8 03 42 80 3c 28 00 0f 85 41 02 00 00 4c 8b b4 24 b0 00 00 00 4c 89 f0 4c 89 f2 48 c1 e8 03 83 e2 07 <42> 0f b6 04 28 38 d0 7f 08 84 c0 0f 85 2a 02 00 00 41 0f b6 36 31 [ 69.268082] RSP: 0018:ffff888077d67bd0 EFLAGS: 00010246 [ 69.273449] RAX: 0000000000000000 RBX: ffff888077d67d90 RCX: ffffffff834376dd [ 69.280735] RDX: 0000000000000000 RSI: ffffffff834376eb RDI: 0000000000000001 [ 69.288025] RBP: ffff888077d67d20 R08: ffff8880777da380 R09: ffffed10137ad3e1 [ 69.295331] R10: ffffed10137ad3e0 R11: 0000000000000005 R12: 0000000000000000 [ 69.302616] R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 [ 69.310054] FS: 00007f451b306700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 69.318300] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.324211] CR2: 0000000020000200 CR3: 00000000a03ba000 CR4: 00000000001406e0 [ 69.331497] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.338795] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.346090] Kernel panic - not syncing: Fatal exception [ 69.352313] Kernel Offset: disabled [ 69.355934] Rebooting in 86400 seconds..