[....] 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. [ 25.771021] kauditd_printk_skb: 7 callbacks suppressed [ 25.771034] audit: type=1800 audit(1537923478.750:29): pid=5459 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 [ 25.798653] audit: type=1800 audit(1537923478.750:30): pid=5459 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 '10.128.0.73' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 39.290607] kasan: CONFIG_KASAN_INLINE enabled [ 39.295309] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 39.302739] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 39.308995] CPU: 0 PID: 5614 Comm: syz-executor604 Not tainted 4.19.0-rc5-next-20180925+ #80 [ 39.317580] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.326930] RIP: 0010:rb_erase+0x306/0x3710 [ 39.331267] 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 [ 39.350173] RSP: 0018:ffff8801d87ce918 EFLAGS: 00010202 [ 39.355525] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 39.362791] RDX: 1ffff1003b0f9d2b RSI: ffffffff8b5a4340 RDI: 0000000000000008 [ 39.370048] RBP: ffff8801d87cf320 R08: dffffc0000000000 R09: fffffbfff135d930 [ 39.377310] R10: fffffbfff135d930 R11: ffffffff89aec983 R12: ffff8801b73601f0 [ 39.384562] R13: dffffc0000000000 R14: ffff8801d87cf2f8 R15: ffff8801d87cf438 [ 39.391823] FS: 00000000010b6880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 39.400038] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.405907] CR2: 0000000020000540 CR3: 00000001bc055000 CR4: 00000000001406f0 [ 39.413174] Call Trace: [ 39.415753] ? lockdep_on+0x50/0x50 [ 39.419370] ? rb_insert_color+0x1460/0x1460 [ 39.423762] ? noop_count+0x40/0x40 [ 39.427373] ? lock_pin_lock+0x350/0x350 [ 39.431433] ? noop_count+0x40/0x40 [ 39.435057] ? kasan_check_read+0x11/0x20 [ 39.439223] ? noop_count+0x40/0x40 [ 39.442835] ? noop_count+0x40/0x40 [ 39.446450] ? lock_pin_lock+0x350/0x350 [ 39.450495] ? mark_held_locks+0x130/0x130 [ 39.454714] ? check_usage_forwards+0x3e0/0x3e0 [ 39.459367] ? __bfs+0x385/0x7a0 [ 39.462716] ? noop_count+0x40/0x40 [ 39.466332] ? check_usage+0x1a9/0x790 [ 39.470203] ? lock_pin_lock+0x350/0x350 [ 39.474249] ? check_usage_forwards+0x3e0/0x3e0 [ 39.478903] ? __bfs+0x385/0x7a0 [ 39.482253] ? __lock_acquire+0x7ec/0x4ec0 [ 39.486474] ? lockdep_on+0x50/0x50 [ 39.490103] ? lock_pin_lock+0x350/0x350 [ 39.494152] ? mark_held_locks+0x130/0x130 [ 39.498379] ? kasan_check_read+0x11/0x20 [ 39.502510] ? __lock_acquire+0x2881/0x4ec0 [ 39.506821] ? mark_held_locks+0x130/0x130 [ 39.511039] ? print_usage_bug+0xc0/0xc0 [ 39.515086] ? _raw_spin_unlock+0x2c/0x50 [ 39.519221] ? graph_lock+0x170/0x170 [ 39.523009] ? ext4_exit_mballoc+0xc0/0xc0 [ 39.527231] ? __lock_acquire+0x7ec/0x4ec0 [ 39.531453] ? find_held_lock+0x36/0x1c0 [ 39.535498] ? mark_held_locks+0x130/0x130 [ 39.539719] ? lock_downgrade+0x900/0x900 [ 39.543856] ? ext4_es_scan+0x950/0x950 [ 39.547818] ? do_raw_write_trylock+0x1c0/0x1c0 [ 39.552476] ? kasan_check_write+0x14/0x20 [ 39.556698] ? lock_acquire+0x1ed/0x520 [ 39.560660] ? integrity_inode_free+0x77/0x320 [ 39.565227] ? ext4_es_remove_extent+0x14c/0x4f0 [ 39.569969] ? lock_release+0x970/0x970 [ 39.573938] ? kasan_check_write+0x14/0x20 [ 39.578157] ? do_raw_write_lock+0xbd/0x1b0 [ 39.582465] integrity_inode_free+0x12f/0x320 [ 39.586950] security_inode_free+0x19/0x90 [ 39.591170] __destroy_inode+0x328/0x820 [ 39.595207] ? generic_update_time+0x450/0x450 [ 39.599768] ? evict+0x5d8/0x980 [ 39.603125] ? lock_downgrade+0x900/0x900 [ 39.607260] ? __inode_wait_for_writeback+0x2cf/0x380 [ 39.612435] destroy_inode+0xda/0x200 [ 39.616218] ? __destroy_inode+0x820/0x820 [ 39.620438] ? kasan_check_write+0x14/0x20 [ 39.624651] ? do_raw_spin_lock+0xc1/0x200 [ 39.628872] evict+0x5e0/0x980 [ 39.632047] ? destroy_inode+0x200/0x200 [ 39.636105] ? iput+0x66c/0xa90 [ 39.639368] ? lock_downgrade+0x900/0x900 [ 39.643522] ? kasan_check_read+0x11/0x20 [ 39.647658] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 39.652225] ? lock_downgrade+0x900/0x900 [ 39.656368] iput+0x674/0xa90 [ 39.659463] ? inode_add_lru+0x2a0/0x2a0 [ 39.663507] ? up_write+0x7b/0x220 [ 39.667057] ? down_write_nested+0x130/0x130 [ 39.671452] ? down_write_nested+0x130/0x130 [ 39.675846] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.681382] ? check_preemption_disabled+0x48/0x200 [ 39.686432] ext4_ioctl+0x236a/0x4210 [ 39.690220] ? ext4_ioctl_group_add+0x560/0x560 [ 39.694877] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 39.699792] ? kasan_check_read+0x11/0x20 [ 39.703926] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 39.709185] ? rcu_softirq_qs+0x20/0x20 [ 39.713140] ? rcu_softirq_qs+0x20/0x20 [ 39.717097] ? unwind_dump+0x190/0x190 [ 39.720972] ? is_bpf_text_address+0xd3/0x170 [ 39.725455] ? kernel_text_address+0x79/0xf0 [ 39.729851] ? __kernel_text_address+0xd/0x40 [ 39.734330] ? unwind_get_return_address+0x61/0xa0 [ 39.739244] ? __save_stack_trace+0x8d/0xf0 [ 39.743583] ? save_stack+0xa9/0xd0 [ 39.747196] ? save_stack+0x43/0xd0 [ 39.750805] ? __kasan_slab_free+0x102/0x150 [ 39.755196] ? kasan_slab_free+0xe/0x10 [ 39.759167] ? kmem_cache_free+0x83/0x290 [ 39.763298] ? putname+0xf2/0x130 [ 39.766746] ? do_sys_open+0x54d/0x700 [ 39.770640] ? __x64_sys_open+0x7e/0xc0 [ 39.774611] ? do_syscall_64+0x1b9/0x820 [ 39.778657] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.784020] ? trace_hardirqs_off+0xb8/0x310 [ 39.788424] ? kasan_check_read+0x11/0x20 [ 39.792941] ? do_raw_spin_unlock+0xa7/0x2f0 [ 39.797336] ? trace_hardirqs_on_caller+0x310/0x310 [ 39.802349] ? kasan_check_write+0x14/0x20 [ 39.806572] ? trace_hardirqs_off+0xb8/0x310 [ 39.810971] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.816493] ? ext4_ioctl_group_add+0x560/0x560 [ 39.821147] do_vfs_ioctl+0x1de/0x1720 [ 39.825020] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 39.830559] ? ioctl_preallocate+0x300/0x300 [ 39.834986] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.840515] ? __fget_light+0x2e9/0x430 [ 39.844474] ? fget_raw+0x20/0x20 [ 39.847956] ? rcu_read_lock_sched_held+0x108/0x120 [ 39.852976] ? kmem_cache_free+0x24f/0x290 [ 39.857199] ? putname+0xf7/0x130 [ 39.860635] ? do_syscall_64+0x9a/0x820 [ 39.864594] ? do_syscall_64+0x9a/0x820 [ 39.868556] ? lockdep_hardirqs_on+0x421/0x5c0 [ 39.873129] ? security_file_ioctl+0x94/0xc0 [ 39.877523] ksys_ioctl+0xa9/0xd0 [ 39.880960] __x64_sys_ioctl+0x73/0xb0 [ 39.884844] do_syscall_64+0x1b9/0x820 [ 39.888734] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 39.894100] ? syscall_return_slowpath+0x5e0/0x5e0 [ 39.899014] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.903847] ? trace_hardirqs_off+0x310/0x310 [ 39.908330] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 39.913345] ? prepare_exit_to_usermode+0x291/0x3b0 [ 39.918348] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.923176] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.928348] RIP: 0033:0x440029 [ 39.931526] 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 [ 39.936082] kobject: 'regulatory.0' (00000000d7d62a75): kobject_uevent_env [ 39.950425] RSP: 002b:00007ffd34d2c468 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 39.950440] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440029 [ 39.950446] RDX: 0000000000440029 RSI: 0000000000006611 RDI: 0000000000000004 [ 39.950453] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 39.950460] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004018b0 [ 39.950467] R13: 0000000000401940 R14: 0000000000000000 R15: 0000000000000000 [ 39.950486] Modules linked in: [ 39.957651] kobject: 'regulatory.0' (00000000d7d62a75): fill_kobj_path: path = '/devices/platform/regulatory.0' [ 40.015095] ---[ end trace 1751417b7272ded4 ]--- [ 40.019912] RIP: 0010:rb_erase+0x306/0x3710 [ 40.024237] 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 [ 40.043178] RSP: 0018:ffff8801d87ce918 EFLAGS: 00010202 [ 40.048575] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 40.055869] RDX: 1ffff1003b0f9d2b RSI: ffffffff8b5a4340 RDI: 0000000000000008 [ 40.063167] RBP: ffff8801d87cf320 R08: dffffc0000000000 R09: fffffbfff135d930 [ 40.070458] R10: fffffbfff135d930 R11: ffffffff89aec983 R12: ffff8801b73601f0 [ 40.077780] R13: dffffc0000000000 R14: ffff8801d87cf2f8 R15: ffff8801d87cf438 [ 40.085054] FS: 00000000010b6880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 40.093315] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.099265] CR2: 0000000020000540 CR3: 00000001bc055000 CR4: 00000000001406f0 [ 40.106556] Kernel panic - not syncing: Fatal exception [ 40.112834] Kernel Offset: disabled [ 40.116471] Rebooting in 86400 seconds..