[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 38.857529] audit: type=1800 audit(1546360052.069:25): pid=7877 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 38.887877] audit: type=1800 audit(1546360052.069:26): pid=7877 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 38.925205] audit: type=1800 audit(1546360052.079:27): pid=7877 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 '10.128.0.95' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 47.073619] kasan: CONFIG_KASAN_INLINE enabled [ 47.079094] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 47.086736] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 47.092974] CPU: 0 PID: 8029 Comm: syz-executor212 Not tainted 4.20.0+ #3 [ 47.099889] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.109241] RIP: 0010:keyctl_pkey_params_get+0x284/0x550 [ 47.114671] 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 [ 47.133553] RSP: 0018:ffff8880a110fbd0 EFLAGS: 00010246 [ 47.138893] RAX: 0000000000000000 RBX: ffff8880a110fd90 RCX: ffffffff834376dd [ 47.146143] RDX: 0000000000000000 RSI: ffffffff834376eb RDI: 0000000000000001 [ 47.153391] RBP: ffff8880a110fd20 R08: ffff8880933c4540 R09: ffffed1013faac79 [ 47.160658] R10: ffffed1013faac78 R11: 0000000000000005 R12: 0000000000000000 [ 47.167909] R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 [ 47.175162] FS: 00007fb42bab5700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 47.183365] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.189254] CR2: 0000000020000200 CR3: 0000000094dba000 CR4: 00000000001406f0 [ 47.196506] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 47.203754] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 47.211002] Call Trace: [ 47.213574] ? __keyctl_dh_compute.cold+0x63/0x63 [ 47.218396] ? lockdep_hardirqs_on+0x415/0x5d0 [ 47.222957] ? trace_hardirqs_on+0xbd/0x310 [ 47.227285] ? trace_hardirqs_off_caller+0x300/0x300 [ 47.232369] ? __kasan_slab_free+0x119/0x150 [ 47.236778] keyctl_pkey_query+0xb8/0x2a0 [ 47.240909] ? keyctl_pkey_params_get_2+0x570/0x570 [ 47.245909] ? do_syscall_64+0x8c/0x800 [ 47.249860] ? do_syscall_64+0x8c/0x800 [ 47.253813] ? do_futex+0x2910/0x2910 [ 47.257605] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.262947] ? trace_hardirqs_off_caller+0x300/0x300 [ 47.268038] __x64_sys_keyctl+0x144/0x420 [ 47.272167] do_syscall_64+0x1a3/0x800 [ 47.276037] ? syscall_return_slowpath+0x5f0/0x5f0 [ 47.280959] ? prepare_exit_to_usermode+0x232/0x3b0 [ 47.285985] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.290815] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.295992] RIP: 0033:0x445589 [ 47.299167] Code: e8 6c b6 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 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 47.318049] RSP: 002b:00007fb42bab4db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa [ 47.325735] RAX: ffffffffffffffda RBX: 00000000006dac28 RCX: 0000000000445589 [ 47.332987] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000018 [ 47.340235] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 [ 47.347486] R10: 0000000020000200 R11: 0000000000000246 R12: 00000000006dac2c [ 47.354736] R13: 00007ffc7dd39acf R14: 00007fb42bab59c0 R15: 00000000006dad2c [ 47.361998] Modules linked in: [ 47.365688] ---[ end trace 45844d09cbfd26be ]--- [ 47.370486] RIP: 0010:keyctl_pkey_params_get+0x284/0x550 [ 47.375960] 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 [ 47.394906] RSP: 0018:ffff8880a110fbd0 EFLAGS: 00010246 [ 47.400263] RAX: 0000000000000000 RBX: ffff8880a110fd90 RCX: ffffffff834376dd [ 47.407547] RDX: 0000000000000000 RSI: ffffffff834376eb RDI: 0000000000000001 [ 47.414829] RBP: ffff8880a110fd20 R08: ffff8880933c4540 R09: ffffed1013faac79 [ 47.422082] R10: ffffed1013faac78 R11: 0000000000000005 R12: 0000000000000000 [ 47.429376] R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 [ 47.436664] FS: 00007fb42bab5700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 47.444906] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.450779] CR2: 0000000020000200 CR3: 0000000094dba000 CR4: 00000000001406f0 [ 47.458067] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 47.465356] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 47.472604] Kernel panic - not syncing: Fatal exception [ 47.478919] Kernel Offset: disabled [ 47.482541] Rebooting in 86400 seconds..