[....] 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. [ 26.860761] kauditd_printk_skb: 8 callbacks suppressed [ 26.860773] audit: type=1800 audit(1539519999.050:29): pid=5241 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 [ 26.886300] audit: type=1800 audit(1539519999.050:30): pid=5241 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 '10.128.10.13' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 40.784870] kasan: CONFIG_KASAN_INLINE enabled [ 40.789668] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 40.797107] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 40.803349] CPU: 0 PID: 5397 Comm: syz-executor206 Not tainted 4.19.0-rc7+ #283 [ 40.810776] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.820139] RIP: 0010:rb_erase+0x306/0x3710 [ 40.824447] 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 [ 40.843332] RSP: 0018:ffff8801bb2d6918 EFLAGS: 00010202 [ 40.848680] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 40.855950] RDX: 1ffff1003765ad2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 40.863205] RBP: ffff8801bb2d7320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 40.870459] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b77811f0 [ 40.877712] R13: dffffc0000000000 R14: ffff8801bb2d72f8 R15: ffff8801bb2d7438 [ 40.884966] FS: 0000000002477880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 40.893176] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.899038] CR2: 0000000020000080 CR3: 00000001d8a66000 CR4: 00000000001406f0 [ 40.906312] Call Trace: [ 40.908897] ? lockdep_on+0x50/0x50 [ 40.912506] ? rb_insert_color+0x1460/0x1460 [ 40.916899] ? noop_count+0x40/0x40 [ 40.920508] ? lock_pin_lock+0x350/0x350 [ 40.924565] ? noop_count+0x40/0x40 [ 40.928288] ? kasan_check_read+0x11/0x20 [ 40.932419] ? noop_count+0x40/0x40 [ 40.936028] ? noop_count+0x40/0x40 [ 40.939648] ? lock_pin_lock+0x350/0x350 [ 40.943701] ? mark_held_locks+0x130/0x130 [ 40.947920] ? check_usage_forwards+0x3e0/0x3e0 [ 40.952585] ? __bfs+0x385/0x7a0 [ 40.955955] ? noop_count+0x40/0x40 [ 40.959570] ? check_usage+0x1a9/0x790 [ 40.963437] ? lock_pin_lock+0x350/0x350 [ 40.967487] ? check_usage_forwards+0x3e0/0x3e0 [ 40.972136] ? __bfs+0x385/0x7a0 [ 40.975483] ? __lock_acquire+0x7ec/0x4ec0 [ 40.979699] ? lockdep_on+0x50/0x50 [ 40.983305] ? lock_pin_lock+0x350/0x350 [ 40.987352] ? mark_held_locks+0x130/0x130 [ 40.991571] ? kasan_check_read+0x11/0x20 [ 40.995708] ? __lock_acquire+0x2881/0x4ec0 [ 41.000017] ? mark_held_locks+0x130/0x130 [ 41.004236] ? print_usage_bug+0xc0/0xc0 [ 41.008295] ? _raw_spin_unlock+0x2c/0x50 [ 41.012442] ? graph_lock+0x170/0x170 [ 41.016236] ? ext4_exit_mballoc+0xc0/0xc0 [ 41.020481] ? __lock_acquire+0x7ec/0x4ec0 [ 41.024722] ? find_held_lock+0x36/0x1c0 [ 41.028768] ? mark_held_locks+0x130/0x130 [ 41.032999] ? lock_downgrade+0x900/0x900 [ 41.037134] ? ext4_es_scan+0x960/0x960 [ 41.041108] ? do_raw_write_trylock+0x1c0/0x1c0 [ 41.045756] ? kasan_check_write+0x14/0x20 [ 41.049988] ? lock_acquire+0x1ed/0x520 [ 41.053956] ? integrity_inode_free+0x77/0x320 [ 41.058524] ? ext4_es_remove_extent+0x151/0x500 [ 41.063275] ? lock_release+0x970/0x970 [ 41.067236] ? kasan_check_write+0x14/0x20 [ 41.071482] ? do_raw_write_lock+0xbd/0x1b0 [ 41.075804] integrity_inode_free+0x12f/0x320 [ 41.080285] security_inode_free+0x19/0x90 [ 41.084504] __destroy_inode+0x328/0x820 [ 41.088549] ? generic_update_time+0x450/0x450 [ 41.093119] ? evict+0x5d8/0x980 [ 41.096469] ? lock_downgrade+0x900/0x900 [ 41.100602] ? __inode_wait_for_writeback+0x2cf/0x380 [ 41.105774] destroy_inode+0xda/0x200 [ 41.109568] ? __destroy_inode+0x820/0x820 [ 41.113786] ? kasan_check_write+0x14/0x20 [ 41.118003] ? do_raw_spin_lock+0xc1/0x200 [ 41.122222] evict+0x5e0/0x980 [ 41.125416] ? destroy_inode+0x200/0x200 [ 41.129462] ? iput+0x671/0xa90 [ 41.132725] ? lock_downgrade+0x900/0x900 [ 41.136858] ? kasan_check_read+0x11/0x20 [ 41.140989] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 41.145553] ? lock_downgrade+0x900/0x900 [ 41.149683] iput+0x679/0xa90 [ 41.152783] ? inode_add_lru+0x2a0/0x2a0 [ 41.156825] ? up_write+0x7b/0x220 [ 41.160349] ? up_read+0x110/0x110 [ 41.163879] ? up_read+0x110/0x110 [ 41.167405] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.172934] ? check_preemption_disabled+0x48/0x200 [ 41.177952] ext4_ioctl+0x236f/0x4210 [ 41.181748] ? is_bpf_text_address+0xac/0x170 [ 41.186227] ? ext4_ioctl_group_add+0x560/0x560 [ 41.190880] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 41.196678] ? kasan_check_read+0x11/0x20 [ 41.200817] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 41.206102] ? rcu_bh_qs+0xc0/0xc0 [ 41.209640] ? rcu_bh_qs+0xc0/0xc0 [ 41.213164] ? unwind_dump+0x190/0x190 [ 41.217043] ? is_bpf_text_address+0xd3/0x170 [ 41.221525] ? kernel_text_address+0x79/0xf0 [ 41.225916] ? __kernel_text_address+0xd/0x40 [ 41.230407] ? unwind_get_return_address+0x61/0xa0 [ 41.235323] ? __save_stack_trace+0x8d/0xf0 [ 41.239641] ? save_stack+0xa9/0xd0 [ 41.243251] ? save_stack+0x43/0xd0 [ 41.246860] ? __kasan_slab_free+0x102/0x150 [ 41.251257] ? kasan_slab_free+0xe/0x10 [ 41.255212] ? kmem_cache_free+0x83/0x290 [ 41.259347] ? putname+0xf2/0x130 [ 41.262781] ? do_sys_open+0x54d/0x700 [ 41.266651] ? __x64_sys_openat+0x9d/0x100 [ 41.270870] ? do_syscall_64+0x1b9/0x820 [ 41.274915] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 41.280273] ? trace_hardirqs_off+0xb8/0x310 [ 41.284660] ? kasan_check_read+0x11/0x20 [ 41.288804] ? do_raw_spin_unlock+0xa7/0x2f0 [ 41.293195] ? trace_hardirqs_on+0x310/0x310 [ 41.297585] ? kasan_check_write+0x14/0x20 [ 41.301800] ? trace_hardirqs_off+0xb8/0x310 [ 41.306204] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.311727] ? check_preemption_disabled+0x48/0x200 [ 41.316740] ? check_preemption_disabled+0x48/0x200 [ 41.321742] ? ext4_ioctl_group_add+0x560/0x560 [ 41.326397] do_vfs_ioctl+0x1de/0x1720 [ 41.330273] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 41.335530] ? ioctl_preallocate+0x300/0x300 [ 41.339924] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.345462] ? __fget_light+0x2e9/0x430 [ 41.349436] ? fget_raw+0x20/0x20 [ 41.352889] ? putname+0xf2/0x130 [ 41.356327] ? rcu_read_lock_sched_held+0x108/0x120 [ 41.361339] ? kmem_cache_free+0x24f/0x290 [ 41.365558] ? putname+0xf7/0x130 [ 41.369001] ? do_syscall_64+0x9a/0x820 [ 41.372965] ? do_syscall_64+0x9a/0x820 [ 41.376924] ? lockdep_hardirqs_on+0x421/0x5c0 [ 41.381505] ? security_file_ioctl+0x94/0xc0 [ 41.385918] ksys_ioctl+0xa9/0xd0 [ 41.389377] __x64_sys_ioctl+0x73/0xb0 [ 41.393259] do_syscall_64+0x1b9/0x820 [ 41.397133] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 41.402482] ? syscall_return_slowpath+0x5e0/0x5e0 [ 41.407392] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.412229] ? trace_hardirqs_on_caller+0x310/0x310 [ 41.417259] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 41.422262] ? prepare_exit_to_usermode+0x291/0x3b0 [ 41.427280] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.432107] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 41.437276] RIP: 0033:0x440009 [ 41.440480] 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 [ 41.459366] RSP: 002b:00007ffea7939f48 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 41.467070] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 41.474321] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 41.481573] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 41.488827] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 41.496077] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 41.503332] Modules linked in: [ 41.506673] ---[ end trace 8117527f52064391 ]--- [ 41.511479] RIP: 0010:rb_erase+0x306/0x3710 [ 41.515792] 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 [ 41.534742] RSP: 0018:ffff8801bb2d6918 EFLAGS: 00010202 [ 41.540154] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 41.547447] RDX: 1ffff1003765ad2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 41.554731] RBP: ffff8801bb2d7320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 41.562042] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b77811f0 [ 41.569327] R13: dffffc0000000000 R14: ffff8801bb2d72f8 R15: ffff8801bb2d7438 [ 41.576653] FS: 0000000002477880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 41.584900] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.590821] CR2: 0000000020000080 CR3: 00000001d8a66000 CR4: 00000000001406f0 [ 41.598113] Kernel panic - not syncing: Fatal exception [ 41.604310] Kernel Offset: disabled [ 41.607952] Rebooting in 86400 seconds..