[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 39.596259] audit: type=1800 audit(1546402479.180:25): pid=7800 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 39.632480] audit: type=1800 audit(1546402479.180:26): pid=7800 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 39.671923] audit: type=1800 audit(1546402479.190:27): pid=7800 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 syzkaller login: [ 44.441059] sshd (7938) used greatest stack depth: 19848 bytes left Warning: Permanently added '10.128.10.30' (ECDSA) to the list of known hosts. executing program [ 51.004216] kasan: CONFIG_KASAN_INLINE enabled [ 51.008880] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 51.016371] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 51.022622] CPU: 0 PID: 7953 Comm: syz-executor920 Not tainted 4.20.0-rc7-next-20181224 #1 [ 51.031002] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.040348] RIP: 0010:keyctl_pkey_params_get+0x284/0x550 [ 51.045782] 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 [ 51.064672] RSP: 0018:ffff8880a7c27bd0 EFLAGS: 00010246 [ 51.070031] RAX: 0000000000000000 RBX: ffff8880a7c27d90 RCX: ffffffff83452b1d [ 51.077287] RDX: 0000000000000000 RSI: ffffffff83452b2b RDI: 0000000000000001 [ 51.084556] RBP: ffff8880a7c27d20 R08: ffff88809073c080 R09: ffffed10152715c9 [ 51.091804] R10: ffffed10152715c8 R11: 0000000000000005 R12: 0000000000000000 [ 51.099054] R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 [ 51.106315] FS: 00007f65f6548700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 51.114522] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 51.120383] CR2: 0000000020000200 CR3: 000000008f669000 CR4: 00000000001406f0 [ 51.127636] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 51.134884] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 51.142128] Call Trace: [ 51.144701] ? __keyctl_dh_compute.cold+0x63/0x63 [ 51.149523] ? lockdep_hardirqs_on+0x415/0x5d0 [ 51.154096] ? trace_hardirqs_on+0xbd/0x310 [ 51.158399] ? trace_hardirqs_off_caller+0x300/0x300 [ 51.163486] ? __kasan_slab_free+0x119/0x150 [ 51.167900] keyctl_pkey_query+0xb8/0x2a0 [ 51.172029] ? keyctl_pkey_params_get_2+0x570/0x570 [ 51.177027] ? do_syscall_64+0x8c/0x800 [ 51.180994] ? do_syscall_64+0x8c/0x800 [ 51.184957] ? do_futex+0x2910/0x2910 [ 51.188740] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 51.194084] ? trace_hardirqs_off_caller+0x300/0x300 [ 51.199168] __x64_sys_keyctl+0x144/0x420 [ 51.203313] do_syscall_64+0x1a3/0x800 [ 51.207191] ? syscall_return_slowpath+0x5f0/0x5f0 [ 51.212101] ? prepare_exit_to_usermode+0x232/0x3b0 [ 51.217099] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 51.221925] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 51.227131] RIP: 0033:0x445589 [ 51.230309] 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 [ 51.249192] RSP: 002b:00007f65f6547db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa [ 51.256895] RAX: ffffffffffffffda RBX: 00000000006dac28 RCX: 0000000000445589 [ 51.264158] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000018 [ 51.271408] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 [ 51.278655] R10: 0000000020000200 R11: 0000000000000246 R12: 00000000006dac2c [ 51.285906] R13: 00007ffc0ff3edbf R14: 00007f65f65489c0 R15: 00000000006dad2c [ 51.293164] Modules linked in: [ 51.296418] ---[ end trace 951235213fb1b261 ]--- [ 51.301175] RIP: 0010:keyctl_pkey_params_get+0x284/0x550 [ 51.306678] 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 [ 51.325741] RSP: 0018:ffff8880a7c27bd0 EFLAGS: 00010246 [ 51.331104] RAX: 0000000000000000 RBX: ffff8880a7c27d90 RCX: ffffffff83452b1d [ 51.338388] RDX: 0000000000000000 RSI: ffffffff83452b2b RDI: 0000000000000001 [ 51.345669] RBP: ffff8880a7c27d20 R08: ffff88809073c080 R09: ffffed10152715c9 [ 51.352922] R10: ffffed10152715c8 R11: 0000000000000005 R12: 0000000000000000 [ 51.360205] R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 [ 51.367509] FS: 00007f65f6548700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 51.375749] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 51.381657] CR2: 0000000020000200 CR3: 000000008f669000 CR4: 00000000001406f0 [ 51.389096] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 51.396388] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 51.403673] Kernel panic - not syncing: Fatal exception [ 51.410017] Kernel Offset: disabled [ 51.413637] Rebooting in 86400 seconds..