[....] 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. [ 26.337121] kauditd_printk_skb: 7 callbacks suppressed [ 26.337133] audit: type=1800 audit(1539846034.934:29): 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 [ 26.362255] audit: type=1800 audit(1539846034.934:30): 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 '10.128.10.36' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.427640] kasan: CONFIG_KASAN_INLINE enabled [ 36.432329] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.439797] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.446067] CPU: 0 PID: 5366 Comm: syz-executor690 Not tainted 4.19.0-rc7+ #265 [ 36.453495] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.462846] RIP: 0010:rb_erase+0x306/0x3710 [ 36.467162] 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 [ 36.486070] RSP: 0018:ffff8801bbeee918 EFLAGS: 00010202 [ 36.491418] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 36.498669] RDX: 1ffff100377ddd2b RSI: ffffffff8afc5020 RDI: 0000000000000008 [ 36.505918] RBP: ffff8801bbeef320 R08: dffffc0000000000 R09: fffffbfff12d68f0 [ 36.513182] R10: fffffbfff12d68f0 R11: ffffffff896b4783 R12: ffff8801b7672870 [ 36.520463] R13: dffffc0000000000 R14: ffff8801bbeef2f8 R15: ffff8801bbeef438 [ 36.527720] FS: 00000000022c9880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 36.535925] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.541785] CR2: 0000000020000080 CR3: 00000001bba41000 CR4: 00000000001406f0 [ 36.549038] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.556289] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.563539] Call Trace: [ 36.566121] ? lockdep_on+0x50/0x50 [ 36.569733] ? rb_insert_color+0x1460/0x1460 [ 36.574128] ? noop_count+0x40/0x40 [ 36.577743] ? lock_pin_lock+0x350/0x350 [ 36.581790] ? rcu_bh_qs+0xc0/0xc0 [ 36.585314] ? unwind_dump+0x190/0x190 [ 36.589206] ? kasan_check_read+0x11/0x20 [ 36.593336] ? __lock_acquire+0x2881/0x4ec0 [ 36.597642] ? noop_count+0x40/0x40 [ 36.601251] ? lock_pin_lock+0x350/0x350 [ 36.605297] ? mark_held_locks+0x130/0x130 [ 36.609516] ? check_usage_forwards+0x3e0/0x3e0 [ 36.614186] ? __bfs+0x385/0x7a0 [ 36.617540] ? check_usage+0x1a9/0x790 [ 36.621415] ? lock_pin_lock+0x350/0x350 [ 36.625464] ? check_usage_forwards+0x3e0/0x3e0 [ 36.630116] ? __bfs+0x385/0x7a0 [ 36.633491] ? modules_open+0xa0/0xa0 [ 36.637273] ? lockdep_on+0x50/0x50 [ 36.640884] ? lock_pin_lock+0x350/0x350 [ 36.644944] ? mark_held_locks+0x130/0x130 [ 36.649167] ? kasan_check_read+0x11/0x20 [ 36.653296] ? __lock_acquire+0x2881/0x4ec0 [ 36.657605] ? mark_held_locks+0x130/0x130 [ 36.661834] ? print_usage_bug+0xc0/0xc0 [ 36.665921] ? _raw_spin_unlock+0x2c/0x50 [ 36.670055] ? graph_lock+0x170/0x170 [ 36.673838] ? ext4_exit_mballoc+0xc0/0xc0 [ 36.678054] ? __lock_acquire+0x7ec/0x4ec0 [ 36.682281] ? find_held_lock+0x36/0x1c0 [ 36.686343] ? mark_held_locks+0x130/0x130 [ 36.690559] ? lock_downgrade+0x900/0x900 [ 36.694694] ? ext4_es_scan+0x960/0x960 [ 36.698654] ? do_raw_write_trylock+0x1c0/0x1c0 [ 36.703307] ? kasan_check_write+0x14/0x20 [ 36.707538] ? lock_acquire+0x1ed/0x520 [ 36.711509] ? integrity_inode_free+0x77/0x320 [ 36.716091] ? ext4_es_remove_extent+0x151/0x500 [ 36.720846] ? lock_release+0x970/0x970 [ 36.724823] ? kasan_check_write+0x14/0x20 [ 36.729060] ? do_raw_write_lock+0xbd/0x1b0 [ 36.733378] integrity_inode_free+0x12f/0x320 [ 36.737863] security_inode_free+0x19/0x90 [ 36.742089] __destroy_inode+0x328/0x820 [ 36.746136] ? generic_update_time+0x450/0x450 [ 36.750705] ? evict+0x5d8/0x980 [ 36.754085] ? lock_downgrade+0x900/0x900 [ 36.758233] ? __inode_wait_for_writeback+0x2cf/0x380 [ 36.763410] destroy_inode+0xda/0x200 [ 36.767206] ? __destroy_inode+0x820/0x820 [ 36.771425] ? kasan_check_write+0x14/0x20 [ 36.775645] ? do_raw_spin_lock+0xc1/0x200 [ 36.779917] evict+0x5e0/0x980 [ 36.783107] ? destroy_inode+0x200/0x200 [ 36.787153] ? iput+0x671/0xa90 [ 36.790429] ? lock_downgrade+0x900/0x900 [ 36.794559] ? kasan_check_read+0x11/0x20 [ 36.798692] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 36.803287] ? lock_downgrade+0x900/0x900 [ 36.807421] iput+0x679/0xa90 [ 36.810510] ? inode_add_lru+0x2a0/0x2a0 [ 36.814555] ? up_write+0x7b/0x220 [ 36.818076] ? up_read+0x110/0x110 [ 36.821633] ? up_read+0x110/0x110 [ 36.825176] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.830698] ? check_preemption_disabled+0x48/0x200 [ 36.835702] ext4_ioctl+0x236f/0x4210 [ 36.839504] ? is_bpf_text_address+0xac/0x170 [ 36.843981] ? ext4_ioctl_group_add+0x560/0x560 [ 36.848655] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 36.854435] ? kasan_check_read+0x11/0x20 [ 36.858567] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 36.863852] ? rcu_bh_qs+0xc0/0xc0 [ 36.867381] ? rcu_bh_qs+0xc0/0xc0 [ 36.870936] ? unwind_dump+0x190/0x190 [ 36.874812] ? is_bpf_text_address+0xd3/0x170 [ 36.879311] ? kernel_text_address+0x79/0xf0 [ 36.883703] ? __kernel_text_address+0xd/0x40 [ 36.888193] ? unwind_get_return_address+0x61/0xa0 [ 36.893110] ? __save_stack_trace+0x8d/0xf0 [ 36.897422] ? save_stack+0xa9/0xd0 [ 36.901045] ? save_stack+0x43/0xd0 [ 36.904660] ? __kasan_slab_free+0x102/0x150 [ 36.909049] ? kasan_slab_free+0xe/0x10 [ 36.913003] ? kmem_cache_free+0x83/0x290 [ 36.917135] ? putname+0xf2/0x130 [ 36.920570] ? do_sys_open+0x54d/0x700 [ 36.924440] ? __x64_sys_openat+0x9d/0x100 [ 36.928675] ? do_syscall_64+0x1b9/0x820 [ 36.932748] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.938103] ? trace_hardirqs_off+0xb8/0x310 [ 36.942494] ? kasan_check_read+0x11/0x20 [ 36.946625] ? do_raw_spin_unlock+0xa7/0x2f0 [ 36.951015] ? trace_hardirqs_on+0x310/0x310 [ 36.955411] ? kasan_check_write+0x14/0x20 [ 36.959650] ? trace_hardirqs_off+0xb8/0x310 [ 36.964078] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.969632] ? check_preemption_disabled+0x48/0x200 [ 36.974656] ? check_preemption_disabled+0x48/0x200 [ 36.979685] ? ext4_ioctl_group_add+0x560/0x560 [ 36.984338] do_vfs_ioctl+0x1de/0x1720 [ 36.988237] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 36.993499] ? ioctl_preallocate+0x300/0x300 [ 36.997895] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.003432] ? __fget_light+0x2e9/0x430 [ 37.007390] ? fget_raw+0x20/0x20 [ 37.010827] ? putname+0xf2/0x130 [ 37.014263] ? rcu_read_lock_sched_held+0x108/0x120 [ 37.019261] ? kmem_cache_free+0x24f/0x290 [ 37.023475] ? putname+0xf7/0x130 [ 37.026945] ? do_syscall_64+0x9a/0x820 [ 37.030932] ? do_syscall_64+0x9a/0x820 [ 37.034717] kobject: 'regulatory.0' (00000000be184d43): kobject_uevent_env [ 37.034915] ? lockdep_hardirqs_on+0x421/0x5c0 [ 37.041983] kobject: 'regulatory.0' (00000000be184d43): fill_kobj_path: path = '/devices/platform/regulatory.0' [ 37.046536] ? security_file_ioctl+0x94/0xc0 [ 37.046550] ksys_ioctl+0xa9/0xd0 [ 37.046566] __x64_sys_ioctl+0x73/0xb0 [ 37.046585] do_syscall_64+0x1b9/0x820 [ 37.072419] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.077789] ? syscall_return_slowpath+0x5e0/0x5e0 [ 37.082713] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.087551] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.092561] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.097573] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.102590] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.107482] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.112711] RIP: 0033:0x440009 [ 37.115933] 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 [ 37.134827] RSP: 002b:00007fff4df631b8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 37.142544] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 37.149805] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 37.157087] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 37.164349] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 37.171614] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 37.178881] Modules linked in: [ 37.182262] ---[ end trace a51d5a1d93baefb5 ]--- [ 37.187090] RIP: 0010:rb_erase+0x306/0x3710 [ 37.191416] 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 [ 37.210337] RSP: 0018:ffff8801bbeee918 EFLAGS: 00010202 [ 37.215723] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 37.222997] RDX: 1ffff100377ddd2b RSI: ffffffff8afc5020 RDI: 0000000000000008 [ 37.230283] RBP: ffff8801bbeef320 R08: dffffc0000000000 R09: fffffbfff12d68f0 [ 37.237570] R10: fffffbfff12d68f0 R11: ffffffff896b4783 R12: ffff8801b7672870 [ 37.244872] R13: dffffc0000000000 R14: ffff8801bbeef2f8 R15: ffff8801bbeef438 [ 37.252158] FS: 00000000022c9880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 37.260416] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.266347] CR2: 0000000020000080 CR3: 00000001bba41000 CR4: 00000000001406f0 [ 37.273614] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.280909] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.288211] Kernel panic - not syncing: Fatal exception [ 37.294468] Kernel Offset: disabled [ 37.298090] Rebooting in 86400 seconds..