[....] 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. [ 26.083001] kauditd_printk_skb: 7 callbacks suppressed [ 26.083015] audit: type=1800 audit(1539922911.548:29): pid=5212 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 26.113717] audit: type=1800 audit(1539922911.548:30): pid=5212 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.60' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 44.570892] kasan: CONFIG_KASAN_INLINE enabled [ 44.575607] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 44.583113] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 44.589349] CPU: 1 PID: 5367 Comm: syz-executor579 Not tainted 4.19.0-rc7+ #266 [ 44.596890] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.606252] RIP: 0010:rb_erase+0x306/0x3710 [ 44.610556] 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 [ 44.629439] RSP: 0018:ffff8801d88f6918 EFLAGS: 00010202 [ 44.634786] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 44.642037] RDX: 1ffff1003b11ed2b RSI: ffffffff8afc5020 RDI: 0000000000000008 [ 44.649287] RBP: ffff8801d88f7320 R08: dffffc0000000000 R09: fffffbfff12d68f0 [ 44.656549] R10: fffffbfff12d68f0 R11: ffffffff896b4783 R12: ffff8801b721c830 [ 44.663813] R13: dffffc0000000000 R14: ffff8801d88f72f8 R15: ffff8801d88f7438 [ 44.671074] FS: 0000000002208880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 44.679320] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.685181] CR2: 00000000200000c0 CR3: 00000001d8bff000 CR4: 00000000001406e0 [ 44.692432] Call Trace: [ 44.695010] ? lockdep_on+0x50/0x50 [ 44.698619] ? rb_insert_color+0x1460/0x1460 [ 44.703266] ? noop_count+0x40/0x40 [ 44.706891] ? lock_pin_lock+0x350/0x350 [ 44.710936] ? rcu_bh_qs+0xc0/0xc0 [ 44.714467] ? unwind_dump+0x190/0x190 [ 44.718359] ? kasan_check_read+0x11/0x20 [ 44.722491] ? __lock_acquire+0x2881/0x4ec0 [ 44.726793] ? noop_count+0x40/0x40 [ 44.730404] ? lock_pin_lock+0x350/0x350 [ 44.734456] ? mark_held_locks+0x130/0x130 [ 44.738674] ? check_usage_forwards+0x3e0/0x3e0 [ 44.743333] ? __bfs+0x385/0x7a0 [ 44.746687] ? check_usage+0x1a9/0x790 [ 44.750575] ? lock_pin_lock+0x350/0x350 [ 44.754628] ? check_usage_forwards+0x3e0/0x3e0 [ 44.759279] ? __bfs+0x385/0x7a0 [ 44.762630] ? modules_open+0xa0/0xa0 [ 44.766411] ? lockdep_on+0x50/0x50 [ 44.770018] ? lock_pin_lock+0x350/0x350 [ 44.774066] ? mark_held_locks+0x130/0x130 [ 44.778285] ? kasan_check_read+0x11/0x20 [ 44.782416] ? __lock_acquire+0x2881/0x4ec0 [ 44.786726] ? mark_held_locks+0x130/0x130 [ 44.790946] ? print_usage_bug+0xc0/0xc0 [ 44.794995] ? _raw_spin_unlock+0x2c/0x50 [ 44.799138] ? graph_lock+0x170/0x170 [ 44.802930] ? ext4_exit_mballoc+0xc0/0xc0 [ 44.807164] ? __lock_acquire+0x7ec/0x4ec0 [ 44.811399] ? find_held_lock+0x36/0x1c0 [ 44.815473] ? mark_held_locks+0x130/0x130 [ 44.819693] ? lock_downgrade+0x900/0x900 [ 44.823830] ? ext4_es_scan+0x960/0x960 [ 44.827794] ? do_raw_write_trylock+0x1c0/0x1c0 [ 44.832499] ? kasan_check_write+0x14/0x20 [ 44.836718] ? lock_acquire+0x1ed/0x520 [ 44.840676] ? integrity_inode_free+0x77/0x320 [ 44.845247] ? ext4_es_remove_extent+0x151/0x500 [ 44.849985] ? lock_release+0x970/0x970 [ 44.853948] ? kasan_check_write+0x14/0x20 [ 44.858168] ? do_raw_write_lock+0xbd/0x1b0 [ 44.862491] integrity_inode_free+0x12f/0x320 [ 44.866972] security_inode_free+0x19/0x90 [ 44.871205] __destroy_inode+0x328/0x820 [ 44.875256] ? generic_update_time+0x450/0x450 [ 44.879818] ? evict+0x5d8/0x980 [ 44.883172] ? lock_downgrade+0x900/0x900 [ 44.887306] ? __inode_wait_for_writeback+0x2cf/0x380 [ 44.892496] destroy_inode+0xda/0x200 [ 44.896278] ? __destroy_inode+0x820/0x820 [ 44.900496] ? kasan_check_write+0x14/0x20 [ 44.904713] ? do_raw_spin_lock+0xc1/0x200 [ 44.908932] evict+0x5e0/0x980 [ 44.912126] ? destroy_inode+0x200/0x200 [ 44.916172] ? iput+0x671/0xa90 [ 44.919461] ? lock_downgrade+0x900/0x900 [ 44.923595] ? kasan_check_read+0x11/0x20 [ 44.927725] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 44.932291] ? lock_downgrade+0x900/0x900 [ 44.936458] iput+0x679/0xa90 [ 44.939548] ? inode_add_lru+0x2a0/0x2a0 [ 44.943594] ? up_write+0x7b/0x220 [ 44.947124] ? up_read+0x110/0x110 [ 44.950658] ? up_read+0x110/0x110 [ 44.954191] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.959729] ? check_preemption_disabled+0x48/0x200 [ 44.964747] ext4_ioctl+0x236f/0x4210 [ 44.968533] ? is_bpf_text_address+0xac/0x170 [ 44.973014] ? ext4_ioctl_group_add+0x560/0x560 [ 44.977699] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 44.983482] ? kasan_check_read+0x11/0x20 [ 44.987623] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 44.992885] ? rcu_bh_qs+0xc0/0xc0 [ 44.996406] ? rcu_bh_qs+0xc0/0xc0 [ 44.999945] ? unwind_dump+0x190/0x190 [ 45.003823] ? is_bpf_text_address+0xd3/0x170 [ 45.008327] ? kernel_text_address+0x79/0xf0 [ 45.012722] ? __kernel_text_address+0xd/0x40 [ 45.017201] ? unwind_get_return_address+0x61/0xa0 [ 45.022128] ? __save_stack_trace+0x8d/0xf0 [ 45.026436] ? save_stack+0xa9/0xd0 [ 45.030051] ? save_stack+0x43/0xd0 [ 45.033669] ? __kasan_slab_free+0x102/0x150 [ 45.038071] ? kasan_slab_free+0xe/0x10 [ 45.042026] ? kmem_cache_free+0x83/0x290 [ 45.046152] ? putname+0xf2/0x130 [ 45.049590] ? do_sys_open+0x54d/0x700 [ 45.053463] ? __x64_sys_openat+0x9d/0x100 [ 45.057701] ? do_syscall_64+0x1b9/0x820 [ 45.061750] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.067101] ? trace_hardirqs_off+0xb8/0x310 [ 45.071499] ? kasan_check_read+0x11/0x20 [ 45.075630] ? do_raw_spin_unlock+0xa7/0x2f0 [ 45.080019] ? trace_hardirqs_on+0x310/0x310 [ 45.084410] ? kasan_check_write+0x14/0x20 [ 45.088629] ? trace_hardirqs_off+0xb8/0x310 [ 45.093021] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.098542] ? check_preemption_disabled+0x48/0x200 [ 45.103543] ? check_preemption_disabled+0x48/0x200 [ 45.108545] ? ext4_ioctl_group_add+0x560/0x560 [ 45.113200] do_vfs_ioctl+0x1de/0x1720 [ 45.117073] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 45.122343] ? ioctl_preallocate+0x300/0x300 [ 45.126767] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.132319] ? __fget_light+0x2e9/0x430 [ 45.136289] ? fget_raw+0x20/0x20 [ 45.139722] ? putname+0xf2/0x130 [ 45.143157] ? rcu_read_lock_sched_held+0x108/0x120 [ 45.148168] ? kmem_cache_free+0x24f/0x290 [ 45.152384] ? putname+0xf7/0x130 [ 45.155823] ? do_syscall_64+0x9a/0x820 [ 45.159779] ? do_syscall_64+0x9a/0x820 [ 45.163741] ? lockdep_hardirqs_on+0x421/0x5c0 [ 45.168313] ? security_file_ioctl+0x94/0xc0 [ 45.172711] ksys_ioctl+0xa9/0xd0 [ 45.176147] __x64_sys_ioctl+0x73/0xb0 [ 45.180034] do_syscall_64+0x1b9/0x820 [ 45.183914] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 45.189263] ? syscall_return_slowpath+0x5e0/0x5e0 [ 45.194173] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.198998] ? trace_hardirqs_on_caller+0x310/0x310 [ 45.204007] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 45.209013] ? prepare_exit_to_usermode+0x291/0x3b0 [ 45.214015] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.218885] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.224068] RIP: 0033:0x440029 [ 45.227248] 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 [ 45.246143] RSP: 002b:00007ffe6f40dc98 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 45.253834] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440029 [ 45.261092] RDX: 0000000000440029 RSI: 0000000000006611 RDI: 0000000000000003 [ 45.268353] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 45.275607] R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004018b0 [ 45.282857] R13: 0000000000401940 R14: 0000000000000000 R15: 0000000000000000 [ 45.290123] Modules linked in: [ 45.293415] ---[ end trace 465c30a9dfadf207 ]--- [ 45.298193] RIP: 0010:rb_erase+0x306/0x3710 [ 45.302635] 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 [ 45.321582] RSP: 0018:ffff8801d88f6918 EFLAGS: 00010202 [ 45.326951] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 45.334236] RDX: 1ffff1003b11ed2b RSI: ffffffff8afc5020 RDI: 0000000000000008 [ 45.341521] RBP: ffff8801d88f7320 R08: dffffc0000000000 R09: fffffbfff12d68f0 [ 45.348784] R10: fffffbfff12d68f0 R11: ffffffff896b4783 R12: ffff8801b721c830 [ 45.356066] R13: dffffc0000000000 R14: ffff8801d88f72f8 R15: ffff8801d88f7438 [ 45.363377] FS: 0000000002208880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 45.371633] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.377529] CR2: 00000000200000c0 CR3: 00000001d8bff000 CR4: 00000000001406e0 [ 45.384813] Kernel panic - not syncing: Fatal exception [ 45.390997] Kernel Offset: disabled [ 45.394619] Rebooting in 86400 seconds..