[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 33.823990] audit: type=1800 audit(1538732544.801:25): pid=5879 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 33.846857] audit: type=1800 audit(1538732544.801:26): pid=5879 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 33.872459] audit: type=1800 audit(1538732544.801:27): pid=5879 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 '10.128.10.2' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.375235] ------------[ cut here ]------------ [ 42.380013] kernel BUG at security/keys/keyring.c:1214! [ 42.385773] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 42.391169] CPU: 0 PID: 6033 Comm: syz-executor565 Not tainted 4.19.0-rc6-next-20181005+ #88 [ 42.399733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.409093] RIP: 0010:__key_link_begin+0x23a/0x300 [ 42.414008] Code: fe 48 c7 c7 00 ea 67 89 e8 83 62 1f fe eb ac e8 4c 47 3e fe 48 c7 c7 00 ea 67 89 e8 a0 f2 77 04 e9 e3 fe ff ff e8 36 47 3e fe <0f> 0b e8 2f 47 3e fe 48 8d bb ce 00 00 00 48 b8 00 00 00 00 00 fc [ 42.432910] RSP: 0018:ffff8801c37f7b10 EFLAGS: 00010293 [ 42.438254] RAX: ffff8801d58d6600 RBX: ffff8801d4431040 RCX: ffffffff833f34af [ 42.445504] RDX: 0000000000000000 RSI: ffffffff833f369a RDI: 0000000000000007 [ 42.452754] RBP: ffff8801c37f7b40 R08: ffff8801d58d6600 R09: fffffbfff12cfc20 [ 42.460005] R10: fffffbfff12cfc20 R11: ffffffff8967e103 R12: ffff8801c37f7c48 [ 42.467256] R13: 0000000000000000 R14: ffff8801d44311c0 R15: ffff8801d4431040 [ 42.474510] FS: 0000000000a43880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 42.482729] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.488590] CR2: 0000000020cab000 CR3: 00000001d5931000 CR4: 00000000001406f0 [ 42.495847] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.503116] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.510364] Call Trace: [ 42.512961] request_key_and_link+0x737/0x17a0 [ 42.517530] ? call_sbin_request_key+0xf80/0xf80 [ 42.522272] ? lock_release+0x970/0x970 [ 42.526229] ? check_same_owner+0x330/0x330 [ 42.530533] ? join_session_keyring+0x340/0x340 [ 42.535188] ? usercopy_warn+0x110/0x110 [ 42.539233] ? keyring_alloc+0xc0/0xc0 [ 42.543110] ? __down_interruptible+0x700/0x700 [ 42.547764] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 42.553289] __x64_sys_request_key+0x305/0x400 [ 42.557857] ? __ia32_sys_add_key+0x4f0/0x4f0 [ 42.562356] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.567705] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 42.573140] ? __sys_setresuid+0x6f3/0x820 [ 42.577364] do_syscall_64+0x1b9/0x820 [ 42.581236] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 42.586810] ? syscall_return_slowpath+0x5e0/0x5e0 [ 42.591728] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.596555] ? trace_hardirqs_on_caller+0x310/0x310 [ 42.601570] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 42.607144] ? prepare_exit_to_usermode+0x291/0x3b0 [ 42.613555] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.619077] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.624250] RIP: 0033:0x440169 [ 42.627429] 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 [ 42.647527] RSP: 002b:00007fff0466c778 EFLAGS: 00000217 ORIG_RAX: 00000000000000f9 [ 42.655739] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440169 [ 42.665428] RDX: 00000000200001c0 RSI: 0000000020000180 RDI: 00000000200000c0 [ 42.673112] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 42.680375] R10: 0000000012805ba6 R11: 0000000000000217 R12: 00000000004019f0 [ 42.687626] R13: 0000000000401a80 R14: 0000000000000000 R15: 0000000000000000 [ 42.694880] Modules linked in: [ 42.698881] ---[ end trace 8c547e7bade7389a ]--- [ 42.703692] RIP: 0010:__key_link_begin+0x23a/0x300 [ 42.708620] Code: fe 48 c7 c7 00 ea 67 89 e8 83 62 1f fe eb ac e8 4c 47 3e fe 48 c7 c7 00 ea 67 89 e8 a0 f2 77 04 e9 e3 fe ff ff e8 36 47 3e fe <0f> 0b e8 2f 47 3e fe 48 8d bb ce 00 00 00 48 b8 00 00 00 00 00 fc [ 42.727838] RSP: 0018:ffff8801c37f7b10 EFLAGS: 00010293 [ 42.733241] RAX: ffff8801d58d6600 RBX: ffff8801d4431040 RCX: ffffffff833f34af [ 42.740513] RDX: 0000000000000000 RSI: ffffffff833f369a RDI: 0000000000000007 [ 42.747812] RBP: ffff8801c37f7b40 R08: ffff8801d58d6600 R09: fffffbfff12cfc20 [ 42.755111] R10: fffffbfff12cfc20 R11: ffffffff8967e103 R12: ffff8801c37f7c48 [ 42.762398] R13: 0000000000000000 R14: ffff8801d44311c0 R15: ffff8801d4431040 [ 42.769669] FS: 0000000000a43880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 42.777913] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.783839] CR2: 0000000020cab000 CR3: 00000001d5931000 CR4: 00000000001406f0 [ 42.791151] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.798427] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.805709] Kernel panic - not syncing: Fatal exception [ 42.812045] Kernel Offset: disabled [ 42.815666] Rebooting in 86400 seconds..