[ 29.923125] audit: type=1800 audit(1543575693.257:27): pid=5915 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 29.942353] audit: type=1800 audit(1543575693.257:28): pid=5915 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 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. [ 30.734943] audit: type=1800 audit(1543575694.157:29): pid=5915 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 30.760352] audit: type=1800 audit(1543575694.157:30): pid=5915 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 34.670758] sshd (6053) used greatest stack depth: 15744 bytes left Warning: Permanently added '10.128.0.90' (ECDSA) to the list of known hosts. executing program [ 41.190127] ------------[ cut here ]------------ [ 41.195009] kernel BUG at security/keys/keyring.c:1214! [ 41.200612] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 41.206017] CPU: 1 PID: 6069 Comm: syz-executor449 Not tainted 4.20.0-rc4+ #134 [ 41.213723] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.223200] RIP: 0010:__key_link_begin+0x23a/0x300 [ 41.228146] Code: fe 48 c7 c7 c0 bb 87 89 e8 03 1f 1f fe eb ac e8 5c 27 3e fe 48 c7 c7 c0 bb 87 89 e8 e0 ea 99 04 e9 e3 fe ff ff e8 46 27 3e fe <0f> 0b e8 3f 27 3e fe 48 8d bb ce 00 00 00 48 b8 00 00 00 00 00 fc [ 41.247196] RSP: 0018:ffff8881b2a27b10 EFLAGS: 00010293 [ 41.252573] RAX: ffff8881c36f8700 RBX: ffff8881b29b4e00 RCX: ffffffff834161cf [ 41.259842] RDX: 0000000000000000 RSI: ffffffff834163ba RDI: 0000000000000007 [ 41.267112] RBP: ffff8881b2a27b40 R08: ffff8881c36f8700 R09: fffffbfff130f658 [ 41.274376] R10: fffffbfff130f658 R11: ffffffff8987b2c3 R12: ffff8881b2a27c48 [ 41.281653] R13: 0000000000000000 R14: ffff8881b29b4c80 R15: ffff8881b29b4e00 [ 41.288916] FS: 0000000001028880(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 [ 41.297137] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.303114] CR2: 0000000020cab000 CR3: 00000001bf5cc000 CR4: 00000000001406e0 [ 41.310769] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.318032] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.325420] Call Trace: [ 41.328021] request_key_and_link+0x737/0x17a0 [ 41.332606] ? call_sbin_request_key+0xf80/0xf80 [ 41.337351] ? lock_release+0xa00/0xa00 [ 41.341312] ? perf_trace_sched_process_exec+0x860/0x860 [ 41.347160] ? join_session_keyring+0x340/0x340 [ 41.351827] ? usercopy_warn+0x110/0x110 [ 41.355874] ? keyring_alloc+0xc0/0xc0 [ 41.359749] ? __down_interruptible+0x700/0x700 [ 41.364634] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 41.370178] __x64_sys_request_key+0x305/0x400 [ 41.374741] ? __ia32_sys_add_key+0x4f0/0x4f0 [ 41.379223] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 41.384588] ? trace_hardirqs_off_caller+0x310/0x310 [ 41.389840] ? __sys_setresuid+0x6f3/0x820 [ 41.394063] do_syscall_64+0x1b9/0x820 [ 41.397933] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 41.403482] ? syscall_return_slowpath+0x5e0/0x5e0 [ 41.408399] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.413340] ? trace_hardirqs_on_caller+0x310/0x310 [ 41.418352] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 41.423362] ? prepare_exit_to_usermode+0x291/0x3b0 [ 41.428370] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.433219] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 41.438396] RIP: 0033:0x440139 [ 41.441757] 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 [ 41.460762] RSP: 002b:00007ffeec94ec48 EFLAGS: 00000217 ORIG_RAX: 00000000000000f9 [ 41.468585] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440139 [ 41.475847] RDX: 0000000020000200 RSI: 0000000020000040 RDI: 0000000020000000 [ 41.483128] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 41.490439] R10: 0000000016bbbd5a R11: 0000000000000217 R12: 00000000004019c0 [ 41.497722] R13: 0000000000401a50 R14: 0000000000000000 R15: 0000000000000000 [ 41.505102] Modules linked in: [ 41.508887] ---[ end trace a7e84ac37f9c48ce ]--- [ 41.513912] RIP: 0010:__key_link_begin+0x23a/0x300 [ 41.518869] Code: fe 48 c7 c7 c0 bb 87 89 e8 03 1f 1f fe eb ac e8 5c 27 3e fe 48 c7 c7 c0 bb 87 89 e8 e0 ea 99 04 e9 e3 fe ff ff e8 46 27 3e fe <0f> 0b e8 3f 27 3e fe 48 8d bb ce 00 00 00 48 b8 00 00 00 00 00 fc [ 41.537972] RSP: 0018:ffff8881b2a27b10 EFLAGS: 00010293 [ 41.543386] RAX: ffff8881c36f8700 RBX: ffff8881b29b4e00 RCX: ffffffff834161cf [ 41.550727] RDX: 0000000000000000 RSI: ffffffff834163ba RDI: 0000000000000007 [ 41.557993] RBP: ffff8881b2a27b40 R08: ffff8881c36f8700 R09: fffffbfff130f658 [ 41.565327] R10: fffffbfff130f658 R11: ffffffff8987b2c3 R12: ffff8881b2a27c48 [ 41.572646] R13: 0000000000000000 R14: ffff8881b29b4c80 R15: ffff8881b29b4e00 [ 41.580001] FS: 0000000001028880(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 [ 41.588328] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.594291] CR2: 0000000020cab000 CR3: 00000001bf5cc000 CR4: 00000000001406e0 [ 41.601593] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.608869] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.616332] Kernel panic - not syncing: Fatal exception [ 41.622632] Kernel Offset: disabled [ 41.626260] Rebooting in 86400 seconds..