[....] 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. [ 26.366635] kauditd_printk_skb: 7 callbacks suppressed [ 26.366648] audit: type=1800 audit(1540429605.694:29): pid=5222 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 [ 26.392201] audit: type=1800 audit(1540429605.704:30): pid=5222 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 '10.128.0.41' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.578711] kasan: CONFIG_KASAN_INLINE enabled [ 36.583433] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.590897] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.597137] CPU: 1 PID: 5376 Comm: syz-executor171 Not tainted 4.19.0+ #301 [ 36.604221] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.613579] RIP: 0010:rb_erase+0x306/0x3710 [ 36.617891] 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 [ 36.636814] RSP: 0018:ffff8801ccf76918 EFLAGS: 00010202 [ 36.642164] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 36.649417] RDX: 1ffff100399eed2b RSI: ffffffff8af92020 RDI: 0000000000000008 [ 36.656670] RBP: ffff8801ccf77320 R08: dffffc0000000000 R09: ffffed00399eee53 [ 36.663939] R10: ffffed00399eee53 R11: 0000000000000003 R12: ffff8801b738e970 [ 36.671193] R13: dffffc0000000000 R14: ffff8801ccf772f8 R15: ffff8801ccf77438 [ 36.678447] FS: 0000000001470880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 36.686655] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.692517] CR2: 00000000200000c0 CR3: 00000001d9758000 CR4: 00000000001406e0 [ 36.699770] Call Trace: [ 36.702346] ? modules_open+0xa0/0xa0 [ 36.706136] ? rb_insert_color+0x1460/0x1460 [ 36.710550] ? noop_count+0x40/0x40 [ 36.714162] ? print_bfs_bug+0x80/0x80 [ 36.718035] ? mark_held_locks+0x130/0x130 [ 36.722263] ? kernel_text_address+0x79/0xf0 [ 36.726658] ? noop_count+0x40/0x40 [ 36.730270] ? print_bfs_bug+0x80/0x80 [ 36.734141] ? noop_count+0x40/0x40 [ 36.737755] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 36.743278] ? check_usage_forwards+0x3d0/0x3d0 [ 36.747933] ? __bfs+0x321/0x780 [ 36.751286] ? check_usage+0x1aa/0x790 [ 36.755157] ? print_bfs_bug+0x80/0x80 [ 36.759033] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 36.763948] ? check_usage_forwards+0x3d0/0x3d0 [ 36.768606] ? kasan_check_read+0x11/0x20 [ 36.772746] ? graph_lock+0x9c/0x270 [ 36.776447] ? __bfs+0x321/0x780 [ 36.779801] ? trace_event_raw_event_lock_acquire+0x440/0x440 [ 36.785671] ? lockdep_on+0x50/0x50 [ 36.789281] ? print_bfs_bug+0x80/0x80 [ 36.793158] ? kasan_check_read+0x11/0x20 [ 36.797290] ? graph_lock+0x9c/0x270 [ 36.800989] ? trace_event_raw_event_lock_acquire+0x440/0x440 [ 36.806858] ? mark_held_locks+0x130/0x130 [ 36.811093] ? kasan_check_read+0x11/0x20 [ 36.815227] ? __lock_acquire+0x2aff/0x4c20 [ 36.819551] ? mark_held_locks+0x130/0x130 [ 36.823834] ? print_usage_bug+0xc0/0xc0 [ 36.827884] ? print_usage_bug+0xc0/0xc0 [ 36.831942] ? __lock_acquire+0x62f/0x4c20 [ 36.836166] ? zap_class+0x640/0x640 [ 36.839880] ? print_usage_bug+0xc0/0xc0 [ 36.843938] ? __lock_acquire+0x62f/0x4c20 [ 36.848164] ? mark_held_locks+0x130/0x130 [ 36.852382] ? lock_downgrade+0x900/0x900 [ 36.856529] ? ext4_es_scan+0x960/0x960 [ 36.860490] ? kasan_check_read+0x11/0x20 [ 36.864625] ? do_raw_write_lock+0x14f/0x310 [ 36.869018] ? do_raw_write_trylock+0x270/0x270 [ 36.873673] ? lock_acquire+0x1ed/0x520 [ 36.877662] ? integrity_inode_free+0x77/0x320 [ 36.882246] ? ext4_es_remove_extent+0x151/0x500 [ 36.886989] ? kasan_check_read+0x11/0x20 [ 36.891126] ? do_raw_write_lock+0x14f/0x310 [ 36.895518] ? do_raw_read_unlock+0x70/0x70 [ 36.899829] ? zap_class+0x640/0x640 [ 36.903531] integrity_inode_free+0x12f/0x320 [ 36.908012] security_inode_free+0x19/0x90 [ 36.912242] __destroy_inode+0x328/0x820 [ 36.916289] ? clear_nlink+0xe0/0xe0 [ 36.919990] ? evict+0x5d8/0x980 [ 36.923346] ? lock_downgrade+0x900/0x900 [ 36.927480] ? __inode_wait_for_writeback+0x2cf/0x380 [ 36.932871] destroy_inode+0xda/0x200 [ 36.936661] ? __destroy_inode+0x820/0x820 [ 36.940885] evict+0x5e0/0x980 [ 36.944066] ? destroy_inode+0x200/0x200 [ 36.948113] ? iput+0x671/0xa90 [ 36.951568] ? lock_downgrade+0x900/0x900 [ 36.955715] ? kasan_check_read+0x11/0x20 [ 36.959862] ? do_raw_spin_trylock+0x270/0x270 [ 36.964427] ? lock_downgrade+0x900/0x900 [ 36.968583] iput+0x679/0xa90 [ 36.971678] ? inode_add_lru+0x2a0/0x2a0 [ 36.975735] ? up_write+0x7b/0x220 [ 36.979267] ? down_write_nested+0x130/0x130 [ 36.983661] ? down_write_nested+0x130/0x130 [ 36.988054] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.993596] ? check_preemption_disabled+0x48/0x280 [ 36.998602] ext4_ioctl+0x236f/0x4210 [ 36.999678] kobject: 'regulatory.0' (00000000223ee51a): kobject_uevent_env [ 37.002404] ? is_bpf_text_address+0xac/0x170 [ 37.009422] kobject: 'regulatory.0' (00000000223ee51a): fill_kobj_path: path = '/devices/platform/regulatory.0' [ 37.013906] ? ext4_ioctl_group_add+0x560/0x560 [ 37.013922] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 37.013935] ? kasan_check_read+0x11/0x20 [ 37.013950] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 37.013967] ? rcu_softirq_qs+0x20/0x20 [ 37.047664] ? rcu_softirq_qs+0x20/0x20 [ 37.051638] ? unwind_dump+0x190/0x190 [ 37.055529] ? is_bpf_text_address+0xd3/0x170 [ 37.060044] ? kernel_text_address+0x79/0xf0 [ 37.064473] ? __kernel_text_address+0xd/0x40 [ 37.069010] ? unwind_get_return_address+0x61/0xa0 [ 37.073960] ? __save_stack_trace+0x8d/0xf0 [ 37.078308] ? save_stack+0xa9/0xd0 [ 37.081935] ? save_stack+0x43/0xd0 [ 37.085558] ? __kasan_slab_free+0x102/0x150 [ 37.089963] ? kasan_slab_free+0xe/0x10 [ 37.093933] ? kmem_cache_free+0x83/0x290 [ 37.098120] ? putname+0xf2/0x130 [ 37.101574] ? do_sys_open+0x54d/0x700 [ 37.105459] ? __x64_sys_openat+0x9d/0x100 [ 37.109736] ? do_syscall_64+0x1b9/0x820 [ 37.113810] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.119173] ? trace_hardirqs_off+0xb8/0x310 [ 37.123583] ? kasan_check_read+0x11/0x20 [ 37.127740] ? do_raw_spin_unlock+0xa7/0x330 [ 37.132153] ? trace_hardirqs_on+0x310/0x310 [ 37.136574] ? trace_hardirqs_off+0xb8/0x310 [ 37.140983] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.146520] ? ext4_ioctl_group_add+0x560/0x560 [ 37.151191] do_vfs_ioctl+0x1de/0x1720 [ 37.155085] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 37.160626] ? ioctl_preallocate+0x300/0x300 [ 37.165033] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.170574] ? __fget_light+0x2e9/0x430 [ 37.174553] ? fget_raw+0x20/0x20 [ 37.178025] ? putname+0xf2/0x130 [ 37.181477] ? rcu_read_lock_sched_held+0x14f/0x180 [ 37.186491] ? kmem_cache_free+0x24f/0x290 [ 37.190743] ? putname+0xf7/0x130 [ 37.194201] ? do_syscall_64+0x9a/0x820 [ 37.198175] ? do_syscall_64+0x9a/0x820 [ 37.202150] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 37.206744] ? security_file_ioctl+0x94/0xc0 [ 37.211187] ksys_ioctl+0xa9/0xd0 [ 37.214643] __x64_sys_ioctl+0x73/0xb0 [ 37.218528] do_syscall_64+0x1b9/0x820 [ 37.222418] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.227781] ? syscall_return_slowpath+0x5e0/0x5e0 [ 37.232713] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.237571] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.242590] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.247626] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.252666] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.257532] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.262716] RIP: 0033:0x440019 [ 37.265950] 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 [ 37.284848] RSP: 002b:00007ffe8fee3478 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 37.292568] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440019 [ 37.299851] RDX: 0000000000440019 RSI: 0000000000006611 RDI: 0000000000000003 [ 37.307119] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 37.314384] R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004018a0 [ 37.321649] R13: 0000000000401930 R14: 0000000000000000 R15: 0000000000000000 [ 37.328920] Modules linked in: [ 37.332245] ---[ end trace 49b6e5e5800906ef ]--- [ 37.337014] RIP: 0010:rb_erase+0x306/0x3710 [ 37.341364] 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 [ 37.360305] RSP: 0018:ffff8801ccf76918 EFLAGS: 00010202 [ 37.365688] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 37.372985] RDX: 1ffff100399eed2b RSI: ffffffff8af92020 RDI: 0000000000000008 [ 37.380278] RBP: ffff8801ccf77320 R08: dffffc0000000000 R09: ffffed00399eee53 [ 37.387550] R10: ffffed00399eee53 R11: 0000000000000003 R12: ffff8801b738e970 [ 37.394838] R13: dffffc0000000000 R14: ffff8801ccf772f8 R15: ffff8801ccf77438 [ 37.402141] FS: 0000000001470880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 37.410387] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.416265] CR2: 00000000200000c0 CR3: 00000001d9758000 CR4: 00000000001406e0 [ 37.423558] Kernel panic - not syncing: Fatal exception [ 37.429690] Kernel Offset: disabled [ 37.433328] Rebooting in 86400 seconds..