[....] 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. [ 27.277551] kauditd_printk_skb: 7 callbacks suppressed [ 27.277562] audit: type=1800 audit(1538163172.282:29): pid=5240 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 27.303041] audit: type=1800 audit(1538163172.292:30): pid=5240 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.0.70' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 38.464145] kasan: CONFIG_KASAN_INLINE enabled [ 38.468864] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 38.476216] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 38.482431] CPU: 1 PID: 5396 Comm: syz-executor146 Not tainted 4.19.0-rc5+ #35 [ 38.489767] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.499108] RIP: 0010:rb_erase+0x306/0x3710 [ 38.503412] 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 [ 38.522296] RSP: 0018:ffff8801d79e6918 EFLAGS: 00010202 [ 38.527637] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 38.534887] RDX: 1ffff1003af3cd2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 38.542138] RBP: ffff8801d79e7320 R08: dffffc0000000000 R09: fffffbfff12d6a48 [ 38.549389] R10: fffffbfff12d6a48 R11: ffffffff896b5243 R12: ffff8801b67721f0 [ 38.556655] R13: dffffc0000000000 R14: ffff8801d79e72f8 R15: ffff8801d79e7438 [ 38.563908] FS: 0000000000f9d880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 38.572128] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.577989] CR2: 0000000020000080 CR3: 00000001d8026000 CR4: 00000000001406e0 [ 38.585256] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.592535] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.599780] Call Trace: [ 38.602353] ? lockdep_on+0x50/0x50 [ 38.605961] ? rb_insert_color+0x1460/0x1460 [ 38.610354] ? noop_count+0x40/0x40 [ 38.613960] ? lock_pin_lock+0x350/0x350 [ 38.618001] ? noop_count+0x40/0x40 [ 38.621621] ? kasan_check_read+0x11/0x20 [ 38.625745] ? noop_count+0x40/0x40 [ 38.629355] ? noop_count+0x40/0x40 [ 38.632963] ? lock_pin_lock+0x350/0x350 [ 38.637004] ? mark_held_locks+0x130/0x130 [ 38.641219] ? check_usage_forwards+0x3e0/0x3e0 [ 38.645866] ? __bfs+0x385/0x7a0 [ 38.649227] ? noop_count+0x40/0x40 [ 38.652835] ? check_usage+0x1a9/0x790 [ 38.656700] ? lock_pin_lock+0x350/0x350 [ 38.660748] ? check_usage_forwards+0x3e0/0x3e0 [ 38.665395] ? __bfs+0x385/0x7a0 [ 38.668743] ? __lock_acquire+0x7ec/0x4ec0 [ 38.672959] ? lockdep_on+0x50/0x50 [ 38.676564] ? lock_pin_lock+0x350/0x350 [ 38.680608] ? mark_held_locks+0x130/0x130 [ 38.684822] ? kasan_check_read+0x11/0x20 [ 38.688951] ? __lock_acquire+0x2881/0x4ec0 [ 38.693256] ? mark_held_locks+0x130/0x130 [ 38.697469] ? print_usage_bug+0xc0/0xc0 [ 38.701517] ? _raw_spin_unlock+0x2c/0x50 [ 38.705648] ? graph_lock+0x170/0x170 [ 38.709433] ? ext4_exit_mballoc+0xc0/0xc0 [ 38.713703] ? __lock_acquire+0x7ec/0x4ec0 [ 38.717925] ? find_held_lock+0x36/0x1c0 [ 38.721975] ? mark_held_locks+0x130/0x130 [ 38.726193] ? lock_downgrade+0x900/0x900 [ 38.730324] ? ext4_es_scan+0x960/0x960 [ 38.734276] ? lock_release+0x970/0x970 [ 38.738233] ? do_raw_write_trylock+0x1c0/0x1c0 [ 38.742881] ? kasan_check_write+0x14/0x20 [ 38.747096] ? lock_acquire+0x1ed/0x520 [ 38.751053] ? integrity_inode_free+0x77/0x320 [ 38.755616] ? ext4_es_remove_extent+0x151/0x500 [ 38.760387] ? lock_release+0x970/0x970 [ 38.764375] ? kasan_check_write+0x14/0x20 [ 38.768604] ? do_raw_write_lock+0xbd/0x1b0 [ 38.772923] integrity_inode_free+0x12f/0x320 [ 38.777408] security_inode_free+0x19/0x90 [ 38.781632] __destroy_inode+0x328/0x820 [ 38.785676] ? generic_update_time+0x450/0x450 [ 38.790242] ? evict+0x5d8/0x980 [ 38.793612] ? lock_downgrade+0x900/0x900 [ 38.797744] ? __inode_wait_for_writeback+0x2cf/0x380 [ 38.802921] destroy_inode+0xda/0x200 [ 38.806716] ? __destroy_inode+0x820/0x820 [ 38.810960] ? kasan_check_write+0x14/0x20 [ 38.815180] ? do_raw_spin_lock+0xc1/0x200 [ 38.819408] evict+0x5e0/0x980 [ 38.822591] ? destroy_inode+0x200/0x200 [ 38.826638] ? iput+0x671/0xa90 [ 38.829902] ? lock_downgrade+0x900/0x900 [ 38.834032] ? kasan_check_read+0x11/0x20 [ 38.838175] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 38.842750] ? lock_downgrade+0x900/0x900 [ 38.846896] iput+0x679/0xa90 [ 38.849987] ? inode_add_lru+0x2a0/0x2a0 [ 38.854030] ? up_write+0x7b/0x220 [ 38.857548] ? up_read+0x110/0x110 [ 38.861084] ? up_read+0x110/0x110 [ 38.864608] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.870129] ? check_preemption_disabled+0x48/0x200 [ 38.875127] ext4_ioctl+0x236f/0x4210 [ 38.878930] ? is_bpf_text_address+0xac/0x170 [ 38.883407] ? ext4_ioctl_group_add+0x560/0x560 [ 38.888065] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 38.893854] ? kasan_check_read+0x11/0x20 [ 38.897983] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 38.903247] ? rcu_bh_qs+0xc0/0xc0 [ 38.906771] ? rcu_bh_qs+0xc0/0xc0 [ 38.910292] ? unwind_dump+0x190/0x190 [ 38.914164] ? is_bpf_text_address+0xd3/0x170 [ 38.918642] ? kernel_text_address+0x79/0xf0 [ 38.923030] ? __kernel_text_address+0xd/0x40 [ 38.927504] ? unwind_get_return_address+0x61/0xa0 [ 38.932418] ? __save_stack_trace+0x8d/0xf0 [ 38.936728] ? save_stack+0xa9/0xd0 [ 38.940333] ? save_stack+0x43/0xd0 [ 38.943940] ? __kasan_slab_free+0x102/0x150 [ 38.948326] ? kasan_slab_free+0xe/0x10 [ 38.952282] ? kmem_cache_free+0x83/0x290 [ 38.956421] ? putname+0xf2/0x130 [ 38.959852] ? do_sys_open+0x54d/0x700 [ 38.963722] ? __x64_sys_openat+0x9d/0x100 [ 38.967935] ? do_syscall_64+0x1b9/0x820 [ 38.971980] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.977327] ? trace_hardirqs_off+0xb8/0x310 [ 38.981720] ? kasan_check_read+0x11/0x20 [ 38.985866] ? do_raw_spin_unlock+0xa7/0x2f0 [ 38.990256] ? trace_hardirqs_on+0x310/0x310 [ 38.994644] ? kasan_check_write+0x14/0x20 [ 38.998860] ? trace_hardirqs_off+0xb8/0x310 [ 39.003250] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.008771] ? check_preemption_disabled+0x48/0x200 [ 39.013768] ? check_preemption_disabled+0x48/0x200 [ 39.018769] ? ext4_ioctl_group_add+0x560/0x560 [ 39.023419] do_vfs_ioctl+0x1de/0x1720 [ 39.027289] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 39.032550] ? ioctl_preallocate+0x300/0x300 [ 39.036941] ? memset+0x31/0x40 [ 39.040205] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.045729] ? smack_file_ioctl+0x210/0x3c0 [ 39.050033] ? fget_raw+0x20/0x20 [ 39.053467] ? smack_file_lock+0x2e0/0x2e0 [ 39.057691] ? do_syscall_64+0x9a/0x820 [ 39.061653] ? do_syscall_64+0x9a/0x820 [ 39.065609] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.071131] ? security_file_ioctl+0x94/0xc0 [ 39.075522] ksys_ioctl+0xa9/0xd0 [ 39.078961] __x64_sys_ioctl+0x73/0xb0 [ 39.082833] do_syscall_64+0x1b9/0x820 [ 39.086703] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 39.092056] ? syscall_return_slowpath+0x5e0/0x5e0 [ 39.096965] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.101791] ? trace_hardirqs_on_caller+0x310/0x310 [ 39.106787] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 39.111783] ? prepare_exit_to_usermode+0x291/0x3b0 [ 39.116782] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.121607] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.126773] RIP: 0033:0x440009 [ 39.129951] 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 [ 39.148834] RSP: 002b:00007ffd58242e38 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 39.156522] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 39.163770] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 39.171023] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 39.178273] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 39.185519] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 39.192772] Modules linked in: [ 39.196048] ---[ end trace ad8b353899d91d11 ]--- [ 39.200854] RIP: 0010:rb_erase+0x306/0x3710 [ 39.205178] 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 [ 39.224211] RSP: 0018:ffff8801d79e6918 EFLAGS: 00010202 [ 39.229608] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 39.236873] RDX: 1ffff1003af3cd2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 39.244154] RBP: ffff8801d79e7320 R08: dffffc0000000000 R09: fffffbfff12d6a48 [ 39.251437] R10: fffffbfff12d6a48 R11: ffffffff896b5243 R12: ffff8801b67721f0 [ 39.258728] R13: dffffc0000000000 R14: ffff8801d79e72f8 R15: ffff8801d79e7438 [ 39.265997] FS: 0000000000f9d880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 39.274231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.280122] CR2: 0000000020000080 CR3: 00000001d8026000 CR4: 00000000001406e0 [ 39.287375] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.294652] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.301939] Kernel panic - not syncing: Fatal exception [ 39.308186] Kernel Offset: disabled [ 39.311821] Rebooting in 86400 seconds..