[ 24.195536] audit: type=1800 audit(1540364972.079:21): pid=5201 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [ 24.222308] audit: type=1800 audit(1540364972.079:22): pid=5201 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. [ 25.345320] sshd (5268) used greatest stack depth: 15496 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.19' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.849473] kasan: CONFIG_KASAN_INLINE enabled [ 36.854269] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.861639] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.867906] CPU: 0 PID: 5359 Comm: syz-executor889 Not tainted 4.19.0-rc8+ #274 [ 36.875337] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.884682] RIP: 0010:rb_erase+0x306/0x3710 [ 36.888992] Code: c7 81 28 01 00 00 f2 f2 f2 f2 c7 81 2c 01 00 00 00 f2 f2 f2 48 89 f9 65 48 8b 1c 25 28 00 00 00 48 89 5d d0 31 db 48 c1 e9 03 <42> 80 3c 01 00 0f 85 41 1c 00 00 4c 8d 48 10 4c 8b 78 08 48 b9 00 [ 36.907879] RSP: 0018:ffff8801b7dc6918 EFLAGS: 00010202 [ 36.913225] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 36.920588] RDX: 1ffff10036fb8d2b RSI: ffffffff8afc5060 RDI: 0000000000000008 [ 36.927849] RBP: ffff8801b7dc7320 R08: dffffc0000000000 R09: fffffbfff12d6970 [ 36.935105] R10: fffffbfff12d6970 R11: ffffffff896b4b83 R12: ffff8801b775e970 [ 36.942364] R13: dffffc0000000000 R14: ffff8801b7dc72f8 R15: ffff8801b7dc7438 [ 36.949618] FS: 0000000000f6f880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 36.958184] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.964046] CR2: 0000000020000080 CR3: 00000001d9580000 CR4: 00000000001406f0 [ 36.971299] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.978550] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.985799] Call Trace: [ 36.988373] ? lockdep_on+0x50/0x50 [ 36.991983] ? rb_insert_color+0x1460/0x1460 [ 36.996375] ? lock_downgrade+0x900/0x900 [ 37.000505] ? noop_count+0x40/0x40 [ 37.004116] ? lock_pin_lock+0x350/0x350 [ 37.008159] ? rcu_bh_qs+0xc0/0xc0 [ 37.011681] ? unwind_dump+0x190/0x190 [ 37.015556] ? kasan_check_read+0x11/0x20 [ 37.019686] ? noop_count+0x40/0x40 [ 37.023297] ? lock_pin_lock+0x350/0x350 [ 37.027338] ? mark_held_locks+0x130/0x130 [ 37.031555] ? check_usage_forwards+0x3e0/0x3e0 [ 37.036207] ? __bfs+0x385/0x7a0 [ 37.039557] ? check_usage+0x1a9/0x790 [ 37.043426] ? lock_pin_lock+0x350/0x350 [ 37.047473] ? check_usage_forwards+0x3e0/0x3e0 [ 37.052127] ? __bfs+0x385/0x7a0 [ 37.055488] ? modules_open+0xa0/0xa0 [ 37.059295] ? lockdep_on+0x50/0x50 [ 37.062906] ? lock_pin_lock+0x350/0x350 [ 37.066954] ? mark_held_locks+0x130/0x130 [ 37.071176] ? kasan_check_read+0x11/0x20 [ 37.075306] ? __lock_acquire+0x2881/0x4ec0 [ 37.079615] ? mark_held_locks+0x130/0x130 [ 37.083839] ? print_usage_bug+0xc0/0xc0 [ 37.087885] ? _raw_spin_unlock+0x2c/0x50 [ 37.092016] ? graph_lock+0x170/0x170 [ 37.095802] ? ext4_exit_mballoc+0xc0/0xc0 [ 37.100037] ? __lock_acquire+0x7ec/0x4ec0 [ 37.104271] ? find_held_lock+0x36/0x1c0 [ 37.108403] ? mark_held_locks+0x130/0x130 [ 37.112622] ? lock_downgrade+0x900/0x900 [ 37.116754] ? ext4_es_scan+0x960/0x960 [ 37.120713] ? lock_release+0x970/0x970 [ 37.124671] ? do_raw_write_trylock+0x1c0/0x1c0 [ 37.129326] ? kasan_check_write+0x14/0x20 [ 37.133545] ? lock_acquire+0x1ed/0x520 [ 37.137500] ? integrity_inode_free+0x77/0x320 [ 37.142070] ? ext4_es_remove_extent+0x151/0x500 [ 37.146810] ? lock_release+0x970/0x970 [ 37.150779] ? kasan_check_write+0x14/0x20 [ 37.155028] ? do_raw_write_lock+0xbd/0x1e0 [ 37.159337] integrity_inode_free+0x12f/0x320 [ 37.163817] security_inode_free+0x19/0x90 [ 37.168055] __destroy_inode+0x328/0x820 [ 37.172098] ? generic_update_time+0x450/0x450 [ 37.176674] ? evict+0x5d8/0x980 [ 37.180021] ? lock_downgrade+0x900/0x900 [ 37.184161] ? __inode_wait_for_writeback+0x2cf/0x380 [ 37.189335] destroy_inode+0xda/0x200 [ 37.193121] ? __destroy_inode+0x820/0x820 [ 37.197340] ? kasan_check_write+0x14/0x20 [ 37.201557] ? do_raw_spin_lock+0xc1/0x230 [ 37.205774] evict+0x5e0/0x980 [ 37.208947] ? destroy_inode+0x200/0x200 [ 37.212989] ? iput+0x671/0xa90 [ 37.216249] ? lock_downgrade+0x900/0x900 [ 37.220398] ? kasan_check_read+0x11/0x20 [ 37.224529] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 37.229093] ? lock_downgrade+0x900/0x900 [ 37.233242] iput+0x679/0xa90 [ 37.236333] ? inode_add_lru+0x2a0/0x2a0 [ 37.240380] ? up_write+0x7b/0x220 [ 37.243899] ? up_read+0x110/0x110 [ 37.247418] ? up_read+0x110/0x110 [ 37.250942] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.256466] ? check_preemption_disabled+0x48/0x280 [ 37.261471] ext4_ioctl+0x236f/0x4210 [ 37.265257] ? is_bpf_text_address+0xac/0x170 [ 37.269737] ? ext4_ioctl_group_add+0x560/0x560 [ 37.274393] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 37.280174] ? kasan_check_read+0x11/0x20 [ 37.284306] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 37.289566] ? rcu_bh_qs+0xc0/0xc0 [ 37.293089] ? rcu_bh_qs+0xc0/0xc0 [ 37.296618] ? unwind_dump+0x190/0x190 [ 37.300493] ? is_bpf_text_address+0xd3/0x170 [ 37.304973] ? kernel_text_address+0x79/0xf0 [ 37.309361] ? __kernel_text_address+0xd/0x40 [ 37.313845] ? unwind_get_return_address+0x61/0xa0 [ 37.318761] ? __save_stack_trace+0x8d/0xf0 [ 37.323070] ? save_stack+0xa9/0xd0 [ 37.326681] ? save_stack+0x43/0xd0 [ 37.330302] ? __kasan_slab_free+0x102/0x150 [ 37.334694] ? kasan_slab_free+0xe/0x10 [ 37.338653] ? kmem_cache_free+0x83/0x290 [ 37.342785] ? putname+0xf2/0x130 [ 37.346222] ? do_sys_open+0x54d/0x700 [ 37.350095] ? __x64_sys_openat+0x9d/0x100 [ 37.354320] ? do_syscall_64+0x1b9/0x820 [ 37.358370] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.363718] ? trace_hardirqs_off+0xb8/0x310 [ 37.368109] ? kasan_check_read+0x11/0x20 [ 37.372240] ? do_raw_spin_unlock+0xa7/0x330 [ 37.376634] ? trace_hardirqs_on+0x310/0x310 [ 37.381027] ? kasan_check_write+0x14/0x20 [ 37.385244] ? trace_hardirqs_off+0xb8/0x310 [ 37.389634] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.395157] ? check_preemption_disabled+0x48/0x280 [ 37.400153] ? check_preemption_disabled+0x48/0x280 [ 37.405193] ? ext4_ioctl_group_add+0x560/0x560 [ 37.409855] do_vfs_ioctl+0x1de/0x1720 [ 37.413730] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 37.419005] ? ioctl_preallocate+0x300/0x300 [ 37.423398] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.428917] ? __fget_light+0x2e9/0x430 [ 37.432878] ? fget_raw+0x20/0x20 [ 37.436312] ? putname+0xf2/0x130 [ 37.439760] ? rcu_read_lock_sched_held+0x108/0x120 [ 37.444761] ? kmem_cache_free+0x24f/0x290 [ 37.448977] ? putname+0xf7/0x130 [ 37.452414] ? do_syscall_64+0x9a/0x820 [ 37.456394] ? do_syscall_64+0x9a/0x820 [ 37.460352] ? lockdep_hardirqs_on+0x421/0x5c0 [ 37.464917] ? security_file_ioctl+0x94/0xc0 [ 37.469309] ksys_ioctl+0xa9/0xd0 [ 37.472747] __x64_sys_ioctl+0x73/0xb0 [ 37.476619] do_syscall_64+0x1b9/0x820 [ 37.480494] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.485848] ? syscall_return_slowpath+0x5e0/0x5e0 [ 37.490775] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.495607] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.500609] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.505610] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.510611] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.515441] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.520616] RIP: 0033:0x440009 [ 37.523796] 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 [ 37.542695] RSP: 002b:00007fff1f9e72b8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 37.550388] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 37.557643] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 37.564896] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 37.572166] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 37.579419] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 37.586675] Modules linked in: [ 37.590011] ---[ end trace acfe973aa5968d5d ]--- [ 37.594844] RIP: 0010:rb_erase+0x306/0x3710 [ 37.599168] Code: c7 81 28 01 00 00 f2 f2 f2 f2 c7 81 2c 01 00 00 00 f2 f2 f2 48 89 f9 65 48 8b 1c 25 28 00 00 00 48 89 5d d0 31 db 48 c1 e9 03 <42> 80 3c 01 00 0f 85 41 1c 00 00 4c 8d 48 10 4c 8b 78 08 48 b9 00 [ 37.618206] RSP: 0018:ffff8801b7dc6918 EFLAGS: 00010202 [ 37.623604] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 37.630874] RDX: 1ffff10036fb8d2b RSI: ffffffff8afc5060 RDI: 0000000000000008 [ 37.638166] RBP: ffff8801b7dc7320 R08: dffffc0000000000 R09: fffffbfff12d6970 [ 37.645458] R10: fffffbfff12d6970 R11: ffffffff896b4b83 R12: ffff8801b775e970 [ 37.652746] R13: dffffc0000000000 R14: ffff8801b7dc72f8 R15: ffff8801b7dc7438 [ 37.660014] FS: 0000000000f6f880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 37.668273] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.674169] CR2: 0000000020000080 CR3: 00000001d9580000 CR4: 00000000001406f0 [ 37.681448] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.688736] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.696023] Kernel panic - not syncing: Fatal exception [ 37.702248] Kernel Offset: disabled [ 37.705872] Rebooting in 86400 seconds..