[info] Using makefile-style concurrent boot in runlevel 2. [ 25.426136] audit: type=1800 audit(1541939079.512:21): pid=5814 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [ 25.445970] audit: type=1800 audit(1541939079.512:22): pid=5814 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] 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 '10.128.10.50' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 48.980517] list_del corruption. prev->next should be ffff8801c135f960, but was 0000000000000007 [ 48.990123] ------------[ cut here ]------------ [ 48.995140] kernel BUG at lib/list_debug.c:53! [ 48.999769] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 49.005140] CPU: 1 PID: 5972 Comm: syz-executor001 Not tainted 4.20.0-rc1-next-20181109+ #110 [ 49.013832] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.023207] RIP: 0010:__list_del_entry_valid.cold.1+0x48/0x4a [ 49.029083] Code: fe 60 88 e8 72 9b d3 fd 0f 0b 48 89 de 48 c7 c7 40 00 61 88 e8 61 9b d3 fd 0f 0b 48 89 de 48 c7 c7 e0 ff 60 88 e8 50 9b d3 fd <0f> 0b 48 89 d9 48 c7 c7 a0 00 61 88 e8 3f 9b d3 fd 0f 0b 48 89 f1 [ 49.047974] RSP: 0018:ffff8801c135f750 EFLAGS: 00010286 [ 49.053323] RAX: 0000000000000054 RBX: ffff8801c135f960 RCX: 0000000000000000 [ 49.060715] RDX: 0000000000000000 RSI: ffffffff8165ba15 RDI: 0000000000000005 [ 49.067972] RBP: ffff8801c135f768 R08: ffff8801c11ce080 R09: ffffed003b5e5020 [ 49.075672] R10: ffffed003b5e5020 R11: ffff8801daf28107 R12: ffff8801d945f3a0 [ 49.082925] R13: ffff8801d945f3a0 R14: 0000000000000000 R15: ffff8801c135f838 [ 49.090181] FS: 00007f96b449c700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 49.098397] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.104268] CR2: 000000000046aa40 CR3: 00000001b39ab000 CR4: 00000000001406e0 [ 49.111522] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 49.118776] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 49.126032] Call Trace: [ 49.128620] locks_delete_block+0xce/0x3d0 [ 49.132957] ? schedule+0xf9/0x370 [ 49.136514] ? graph_lock+0x270/0x270 [ 49.140393] ? locks_unlink_lock_ctx+0x740/0x740 [ 49.145155] ? lock_acquire+0x1ed/0x520 [ 49.149116] ? replenish_dl_entity.cold.55+0x36/0x36 [ 49.154207] ? __might_sleep+0x95/0x190 [ 49.158174] locks_mandatory_area+0x48b/0x6a0 [ 49.162664] ? do_lock_file_wait.part.31+0x260/0x260 [ 49.167756] ? finish_wait+0x430/0x430 [ 49.171657] rw_verify_area+0x2f2/0x360 [ 49.175622] do_iter_write+0x101/0x5f0 [ 49.179502] ? rcu_read_lock_sched_held+0x14f/0x180 [ 49.184515] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.190041] vfs_writev+0x1f1/0x360 [ 49.193656] ? vfs_iter_write+0xb0/0xb0 [ 49.197626] ? ksys_unshare+0x43e/0x10b0 [ 49.201672] ? graph_lock+0x270/0x270 [ 49.205466] ? mutex_lock_nested+0x16/0x20 [ 49.209825] ? mutex_lock_nested+0x16/0x20 [ 49.214059] ? __fdget_pos+0xde/0x200 [ 49.217855] ? __fdget_raw+0x20/0x20 [ 49.221562] do_writev+0x11a/0x310 [ 49.225098] ? vfs_writev+0x360/0x360 [ 49.228890] ? trace_hardirqs_off_caller+0x300/0x300 [ 49.233977] ? trace_hardirqs_off+0xb8/0x310 [ 49.238372] __x64_sys_writev+0x75/0xb0 [ 49.242334] do_syscall_64+0x1b9/0x820 [ 49.246210] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 49.251559] ? syscall_return_slowpath+0x5e0/0x5e0 [ 49.256488] ? trace_hardirqs_on_caller+0x310/0x310 [ 49.261492] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 49.266501] ? post_copy_siginfo_from_user.isra.25.part.26+0x250/0x250 [ 49.273265] ? __switch_to_asm+0x40/0x70 [ 49.277314] ? __switch_to_asm+0x34/0x70 [ 49.281364] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.286208] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.291388] RIP: 0033:0x446619 [ 49.294577] Code: e8 6c 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 [ 49.313551] RSP: 002b:00007f96b449bda8 EFLAGS: 00000297 ORIG_RAX: 0000000000000014 [ 49.321263] RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 0000000000446619 [ 49.328541] RDX: 0000000000000001 RSI: 0000000020000440 RDI: 0000000000000003 [ 49.335857] RBP: 00000000006dbc30 R08: 0000000000000000 R09: 0000000000000000 [ 49.343138] R10: 0000000000000000 R11: 0000000000000297 R12: 00000000006dbc3c [ 49.350412] R13: 2f30656c69662f2e R14: 64663d736e617274 R15: 00000000006dbd2c [ 49.357672] Modules linked in: [ 49.360920] ---[ end trace efdc3057b60b19f3 ]--- [ 49.365720] RIP: 0010:__list_del_entry_valid.cold.1+0x48/0x4a [ 49.371592] Code: fe 60 88 e8 72 9b d3 fd 0f 0b 48 89 de 48 c7 c7 40 00 61 88 e8 61 9b d3 fd 0f 0b 48 89 de 48 c7 c7 e0 ff 60 88 e8 50 9b d3 fd <0f> 0b 48 89 d9 48 c7 c7 a0 00 61 88 e8 3f 9b d3 fd 0f 0b 48 89 f1 [ 49.391205] RSP: 0018:ffff8801c135f750 EFLAGS: 00010286 [ 49.396624] RAX: 0000000000000054 RBX: ffff8801c135f960 RCX: 0000000000000000 [ 49.403922] RDX: 0000000000000000 RSI: ffffffff8165ba15 RDI: 0000000000000005 [ 49.411196] RBP: ffff8801c135f768 R08: ffff8801c11ce080 R09: ffffed003b5e5020 [ 49.418502] R10: ffffed003b5e5020 R11: ffff8801daf28107 R12: ffff8801d945f3a0 [ 49.425806] R13: ffff8801d945f3a0 R14: 0000000000000000 R15: ffff8801c135f838 [ 49.433067] FS: 00007f96b449c700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 49.441325] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.447240] CR2: 000000000046aa40 CR3: 00000001b39ab000 CR4: 00000000001406e0 [ 49.454527] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 49.461798] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 49.469107] Kernel panic - not syncing: Fatal exception [ 49.475564] Kernel Offset: disabled [ 49.479196] Rebooting in 86400 seconds..