[....] 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. [ 26.026005] kauditd_printk_skb: 7 callbacks suppressed [ 26.026018] audit: type=1800 audit(1539727332.905:29): pid=5183 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 [ 26.052555] audit: type=1800 audit(1539727332.905:30): pid=5183 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 '10.128.0.75' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 34.989408] kasan: CONFIG_KASAN_INLINE enabled [ 34.994138] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 35.001578] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 35.007819] CPU: 0 PID: 5337 Comm: syz-executor344 Not tainted 4.19.0-rc7+ #143 [ 35.015271] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.024625] RIP: 0010:rb_erase+0x306/0x3710 [ 35.028941] 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 [ 35.047824] RSP: 0018:ffff8801c24a6918 EFLAGS: 00010202 [ 35.053199] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 35.060454] RDX: 1ffff10038494d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 35.067705] RBP: ffff8801c24a7320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 35.074957] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801b6e21970 [ 35.082208] R13: dffffc0000000000 R14: ffff8801c24a72f8 R15: ffff8801c24a7438 [ 35.089459] FS: 0000000000ec5880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 35.097667] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.103530] CR2: 0000000020000080 CR3: 00000001bf8ae000 CR4: 00000000001406f0 [ 35.110801] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.118052] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.125302] Call Trace: [ 35.127874] ? lockdep_on+0x50/0x50 [ 35.131505] ? rb_insert_color+0x1460/0x1460 [ 35.135998] ? noop_count+0x40/0x40 [ 35.139607] ? lock_pin_lock+0x350/0x350 [ 35.143650] ? rcu_bh_qs+0xc0/0xc0 [ 35.147174] ? unwind_dump+0x190/0x190 [ 35.151044] ? kasan_check_read+0x11/0x20 [ 35.155176] ? __lock_acquire+0x2881/0x4ec0 [ 35.159483] ? noop_count+0x40/0x40 [ 35.163094] ? lock_pin_lock+0x350/0x350 [ 35.167135] ? mark_held_locks+0x130/0x130 [ 35.171355] ? check_usage_forwards+0x3e0/0x3e0 [ 35.176007] ? __bfs+0x385/0x7a0 [ 35.179356] ? check_usage+0x1a9/0x790 [ 35.183247] ? lock_pin_lock+0x350/0x350 [ 35.187314] ? check_usage_forwards+0x3e0/0x3e0 [ 35.191963] ? __bfs+0x385/0x7a0 [ 35.195331] ? modules_open+0xa0/0xa0 [ 35.199109] ? lockdep_on+0x50/0x50 [ 35.202720] ? lock_pin_lock+0x350/0x350 [ 35.206789] ? mark_held_locks+0x130/0x130 [ 35.211008] ? kasan_check_read+0x11/0x20 [ 35.215156] ? __lock_acquire+0x2881/0x4ec0 [ 35.219483] ? mark_held_locks+0x130/0x130 [ 35.223702] ? print_usage_bug+0xc0/0xc0 [ 35.227745] ? _raw_spin_unlock+0x2c/0x50 [ 35.231879] ? graph_lock+0x170/0x170 [ 35.235662] ? ext4_exit_mballoc+0xc0/0xc0 [ 35.239878] ? __lock_acquire+0x7ec/0x4ec0 [ 35.244097] ? find_held_lock+0x36/0x1c0 [ 35.248158] ? mark_held_locks+0x130/0x130 [ 35.252379] ? lock_downgrade+0x900/0x900 [ 35.256512] ? ext4_es_scan+0x960/0x960 [ 35.260474] ? do_raw_write_trylock+0x1c0/0x1c0 [ 35.265124] ? kasan_check_write+0x14/0x20 [ 35.269342] ? lock_acquire+0x1ed/0x520 [ 35.273303] ? integrity_inode_free+0x77/0x320 [ 35.277869] ? ext4_es_remove_extent+0x151/0x500 [ 35.282611] ? lock_release+0x970/0x970 [ 35.286569] ? kasan_check_write+0x14/0x20 [ 35.290806] ? do_raw_write_lock+0xbd/0x1b0 [ 35.295110] integrity_inode_free+0x12f/0x320 [ 35.299590] security_inode_free+0x19/0x90 [ 35.303821] __destroy_inode+0x328/0x820 [ 35.307866] ? generic_update_time+0x450/0x450 [ 35.312432] ? evict+0x5d8/0x980 [ 35.315787] ? lock_downgrade+0x900/0x900 [ 35.319917] ? __inode_wait_for_writeback+0x2cf/0x380 [ 35.325091] destroy_inode+0xda/0x200 [ 35.328873] ? __destroy_inode+0x820/0x820 [ 35.333090] ? kasan_check_write+0x14/0x20 [ 35.337306] ? do_raw_spin_lock+0xc1/0x200 [ 35.341526] evict+0x5e0/0x980 [ 35.344703] ? destroy_inode+0x200/0x200 [ 35.348746] ? iput+0x671/0xa90 [ 35.352030] ? lock_downgrade+0x900/0x900 [ 35.356172] ? kasan_check_read+0x11/0x20 [ 35.360305] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 35.364884] ? lock_downgrade+0x900/0x900 [ 35.369013] iput+0x679/0xa90 [ 35.372106] ? inode_add_lru+0x2a0/0x2a0 [ 35.376148] ? up_write+0x7b/0x220 [ 35.379667] ? up_read+0x110/0x110 [ 35.383188] ? up_read+0x110/0x110 [ 35.386716] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.392264] ? check_preemption_disabled+0x48/0x200 [ 35.397269] ext4_ioctl+0x236f/0x4210 [ 35.401056] ? is_bpf_text_address+0xac/0x170 [ 35.405549] ? ext4_ioctl_group_add+0x560/0x560 [ 35.410203] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 35.415980] ? kasan_check_read+0x11/0x20 [ 35.420134] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 35.425424] ? rcu_bh_qs+0xc0/0xc0 [ 35.428959] ? rcu_bh_qs+0xc0/0xc0 [ 35.432482] ? unwind_dump+0x190/0x190 [ 35.436370] ? is_bpf_text_address+0xd3/0x170 [ 35.440872] ? kernel_text_address+0x79/0xf0 [ 35.445313] ? __kernel_text_address+0xd/0x40 [ 35.449791] ? unwind_get_return_address+0x61/0xa0 [ 35.454707] ? __save_stack_trace+0x8d/0xf0 [ 35.459022] ? save_stack+0xa9/0xd0 [ 35.462633] ? save_stack+0x43/0xd0 [ 35.466247] ? __kasan_slab_free+0x102/0x150 [ 35.470640] ? kasan_slab_free+0xe/0x10 [ 35.474612] ? kmem_cache_free+0x83/0x290 [ 35.478786] ? putname+0xf2/0x130 [ 35.482221] ? do_sys_open+0x54d/0x700 [ 35.486097] ? __x64_sys_openat+0x9d/0x100 [ 35.490330] ? do_syscall_64+0x1b9/0x820 [ 35.494390] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 35.499739] ? trace_hardirqs_off+0xb8/0x310 [ 35.504131] ? kasan_check_read+0x11/0x20 [ 35.508268] ? do_raw_spin_unlock+0xa7/0x2f0 [ 35.512672] ? trace_hardirqs_on+0x310/0x310 [ 35.517071] ? kasan_check_write+0x14/0x20 [ 35.521317] ? trace_hardirqs_off+0xb8/0x310 [ 35.525706] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.531226] ? check_preemption_disabled+0x48/0x200 [ 35.536272] ? check_preemption_disabled+0x48/0x200 [ 35.541275] ? ext4_ioctl_group_add+0x560/0x560 [ 35.545930] do_vfs_ioctl+0x1de/0x1720 [ 35.549816] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 35.555091] ? ioctl_preallocate+0x300/0x300 [ 35.559512] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.565065] ? __fget_light+0x2e9/0x430 [ 35.569022] ? fget_raw+0x20/0x20 [ 35.572455] ? putname+0xf2/0x130 [ 35.575888] ? rcu_read_lock_sched_held+0x108/0x120 [ 35.580917] ? kmem_cache_free+0x24f/0x290 [ 35.585148] ? putname+0xf7/0x130 [ 35.588584] ? do_syscall_64+0x9a/0x820 [ 35.592562] ? do_syscall_64+0x9a/0x820 [ 35.596519] ? lockdep_hardirqs_on+0x421/0x5c0 [ 35.601087] ? security_file_ioctl+0x94/0xc0 [ 35.605478] ksys_ioctl+0xa9/0xd0 [ 35.608930] __x64_sys_ioctl+0x73/0xb0 [ 35.612814] do_syscall_64+0x1b9/0x820 [ 35.616686] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 35.622035] ? syscall_return_slowpath+0x5e0/0x5e0 [ 35.626944] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.631770] ? trace_hardirqs_on_caller+0x310/0x310 [ 35.636771] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 35.641785] ? prepare_exit_to_usermode+0x291/0x3b0 [ 35.646786] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.651632] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 35.656800] RIP: 0033:0x440009 [ 35.659987] 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 [ 35.678883] RSP: 002b:00007ffe97110b98 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 35.686575] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 35.693827] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 35.701667] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 35.710731] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 35.718005] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 35.725267] Modules linked in: [ 35.728564] ---[ end trace bda58d1bdb12ecb2 ]--- [ 35.733390] RIP: 0010:rb_erase+0x306/0x3710 [ 35.737714] 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 [ 35.756695] RSP: 0018:ffff8801c24a6918 EFLAGS: 00010202 [ 35.762133] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 35.769387] RDX: 1ffff10038494d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 35.776686] RBP: ffff8801c24a7320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 35.783987] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801b6e21970 [ 35.791289] R13: dffffc0000000000 R14: ffff8801c24a72f8 R15: ffff8801c24a7438 [ 35.798554] FS: 0000000000ec5880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 35.806826] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.812732] CR2: 0000000020000080 CR3: 00000001bf8ae000 CR4: 00000000001406f0 [ 35.820353] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.827610] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.834965] Kernel panic - not syncing: Fatal exception [ 35.841151] Kernel Offset: disabled [ 35.844774] Rebooting in 86400 seconds..