[....] 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. [ 26.632749] kauditd_printk_skb: 7 callbacks suppressed [ 26.632760] audit: type=1800 audit(1537914115.989:29): pid=5209 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 [ 26.661081] audit: type=1800 audit(1537914115.989:30): pid=5209 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 '10.128.0.19' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.225846] kasan: CONFIG_KASAN_INLINE enabled [ 36.230879] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.238249] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.244475] CPU: 0 PID: 5365 Comm: syz-executor009 Not tainted 4.19.0-rc5+ #254 [ 36.252134] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.261685] RIP: 0010:rb_erase+0x306/0x3710 [ 36.266076] 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 [ 36.285232] RSP: 0018:ffff8801be57e918 EFLAGS: 00010202 [ 36.290588] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 36.297849] RDX: 1ffff10037cafd2b RSI: ffffffff8b5a08a0 RDI: 0000000000000008 [ 36.305326] RBP: ffff8801be57f320 R08: dffffc0000000000 R09: fffffbfff135d5c8 [ 36.312674] R10: fffffbfff135d5c8 R11: ffffffff89aeae43 R12: ffff8801c4c08570 [ 36.319998] R13: dffffc0000000000 R14: ffff8801be57f2f8 R15: ffff8801be57f438 [ 36.327264] FS: 0000000001e11880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 36.335609] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.341484] CR2: 0000000020000540 CR3: 00000001d937e000 CR4: 00000000001406f0 [ 36.348749] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.356023] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.363285] Call Trace: [ 36.365871] ? lockdep_on+0x50/0x50 [ 36.369497] ? rb_insert_color+0x1460/0x1460 [ 36.373903] ? noop_count+0x40/0x40 [ 36.377523] ? lock_pin_lock+0x350/0x350 [ 36.381577] ? noop_count+0x40/0x40 [ 36.385219] ? kasan_check_read+0x11/0x20 [ 36.389363] ? noop_count+0x40/0x40 [ 36.392981] ? noop_count+0x40/0x40 [ 36.396600] ? lock_pin_lock+0x350/0x350 [ 36.400656] ? mark_held_locks+0x130/0x130 [ 36.404967] ? check_usage_forwards+0x3e0/0x3e0 [ 36.409631] ? __bfs+0x385/0x7a0 [ 36.412986] ? noop_count+0x40/0x40 [ 36.416604] ? check_usage+0x1a9/0x790 [ 36.420485] ? lock_pin_lock+0x350/0x350 [ 36.424597] ? check_usage_forwards+0x3e0/0x3e0 [ 36.429260] ? __bfs+0x385/0x7a0 [ 36.432620] ? __lock_acquire+0x7ec/0x4ec0 [ 36.437107] ? lockdep_on+0x50/0x50 [ 36.440788] ? lock_pin_lock+0x350/0x350 [ 36.444893] ? mark_held_locks+0x130/0x130 [ 36.449125] ? kasan_check_read+0x11/0x20 [ 36.453270] ? __lock_acquire+0x2881/0x4ec0 [ 36.457590] ? mark_held_locks+0x130/0x130 [ 36.461822] ? print_usage_bug+0xc0/0xc0 [ 36.465879] ? _raw_spin_unlock+0x2c/0x50 [ 36.470093] ? graph_lock+0x170/0x170 [ 36.473939] ? ext4_exit_mballoc+0xc0/0xc0 [ 36.478167] ? __lock_acquire+0x7ec/0x4ec0 [ 36.482419] ? find_held_lock+0x36/0x1c0 [ 36.486525] ? mark_held_locks+0x130/0x130 [ 36.490803] ? lock_downgrade+0x900/0x900 [ 36.494948] ? ext4_es_scan+0x960/0x960 [ 36.499052] ? lock_release+0x970/0x970 [ 36.503153] ? do_raw_write_trylock+0x1c0/0x1c0 [ 36.507816] ? kasan_check_write+0x14/0x20 [ 36.512099] ? lock_acquire+0x1ed/0x520 [ 36.516066] ? integrity_inode_free+0x77/0x320 [ 36.520641] ? ext4_es_remove_extent+0x151/0x500 [ 36.525390] ? lock_release+0x970/0x970 [ 36.529406] ? kasan_check_write+0x14/0x20 [ 36.533635] ? do_raw_write_lock+0xbd/0x1b0 [ 36.537950] integrity_inode_free+0x12f/0x320 [ 36.542443] security_inode_free+0x19/0x90 [ 36.546674] __destroy_inode+0x328/0x820 [ 36.550863] ? generic_update_time+0x450/0x450 [ 36.555437] ? evict+0x5d8/0x980 [ 36.558799] ? lock_downgrade+0x900/0x900 [ 36.562993] ? __inode_wait_for_writeback+0x2cf/0x380 [ 36.568251] destroy_inode+0xda/0x200 [ 36.572046] ? __destroy_inode+0x820/0x820 [ 36.576270] ? kasan_check_write+0x14/0x20 [ 36.580498] ? do_raw_spin_lock+0xc1/0x200 [ 36.584731] evict+0x5e0/0x980 [ 36.587938] ? destroy_inode+0x200/0x200 [ 36.591995] ? iput+0x671/0xa90 [ 36.595322] ? lock_downgrade+0x900/0x900 [ 36.599470] ? kasan_check_read+0x11/0x20 [ 36.603613] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 36.608237] ? lock_downgrade+0x900/0x900 [ 36.612388] iput+0x679/0xa90 [ 36.615488] ? inode_add_lru+0x2a0/0x2a0 [ 36.619545] ? up_write+0x7b/0x220 [ 36.623079] ? up_read+0x110/0x110 [ 36.626612] ? up_read+0x110/0x110 [ 36.630148] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.635678] ? check_preemption_disabled+0x48/0x200 [ 36.640693] ext4_ioctl+0x236f/0x4210 [ 36.644493] ? ext4_ioctl_group_add+0x560/0x560 [ 36.649160] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 36.654999] ? kasan_check_read+0x11/0x20 [ 36.659144] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 36.664415] ? rcu_bh_qs+0xc0/0xc0 [ 36.668000] ? rcu_bh_qs+0xc0/0xc0 [ 36.671582] ? unwind_dump+0x190/0x190 [ 36.675472] ? is_bpf_text_address+0xd3/0x170 [ 36.680004] ? kernel_text_address+0x79/0xf0 [ 36.684408] ? __kernel_text_address+0xd/0x40 [ 36.688899] ? unwind_get_return_address+0x61/0xa0 [ 36.693825] ? __save_stack_trace+0x8d/0xf0 [ 36.698145] ? save_stack+0xa9/0xd0 [ 36.701766] ? save_stack+0x43/0xd0 [ 36.705388] ? __kasan_slab_free+0x102/0x150 [ 36.709792] ? kasan_slab_free+0xe/0x10 [ 36.713764] ? kmem_cache_free+0x83/0x290 [ 36.718036] ? putname+0xf2/0x130 [ 36.721484] ? do_sys_open+0x54d/0x700 [ 36.725364] ? __x64_sys_open+0x7e/0xc0 [ 36.729336] ? do_syscall_64+0x1b9/0x820 [ 36.733392] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.738804] ? trace_hardirqs_off+0xb8/0x310 [ 36.743229] ? kasan_check_read+0x11/0x20 [ 36.747368] ? do_raw_spin_unlock+0xa7/0x2f0 [ 36.751769] ? trace_hardirqs_on+0x310/0x310 [ 36.756168] ? kasan_check_write+0x14/0x20 [ 36.760421] ? trace_hardirqs_off+0xb8/0x310 [ 36.764824] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.770404] ? check_preemption_disabled+0x48/0x200 [ 36.775416] ? ext4_ioctl_group_add+0x560/0x560 [ 36.780078] do_vfs_ioctl+0x1de/0x1720 [ 36.783965] ? rcu_lockdep_current_cpu_online+0x1f0/0x2d0 [ 36.789496] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 36.794884] ? ioctl_preallocate+0x300/0x300 [ 36.799293] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.804822] ? __fget_light+0x2e9/0x430 [ 36.808788] ? fget_raw+0x20/0x20 [ 36.812240] ? rcu_read_lock_sched_held+0x108/0x120 [ 36.817255] ? kmem_cache_free+0x24f/0x290 [ 36.821532] ? putname+0xf7/0x130 [ 36.825109] ? do_syscall_64+0x9a/0x820 [ 36.829077] ? do_syscall_64+0x9a/0x820 [ 36.833132] ? lockdep_hardirqs_on+0x421/0x5c0 [ 36.837707] ? security_file_ioctl+0x94/0xc0 [ 36.842112] ksys_ioctl+0xa9/0xd0 [ 36.845559] __x64_sys_ioctl+0x73/0xb0 [ 36.848623] kobject: 'regulatory.0' (00000000c63c8410): kobject_uevent_env [ 36.849454] do_syscall_64+0x1b9/0x820 [ 36.856482] kobject: 'regulatory.0' (00000000c63c8410): fill_kobj_path: path = '/devices/platform/regulatory.0' [ 36.860357] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 36.860372] ? syscall_return_slowpath+0x5e0/0x5e0 [ 36.860386] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.860402] ? trace_hardirqs_on_caller+0x310/0x310 [ 36.860420] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 36.895803] ? prepare_exit_to_usermode+0x291/0x3b0 [ 36.900829] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.905686] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.910971] RIP: 0033:0x440049 [ 36.914170] 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 [ 36.933224] RSP: 002b:00007ffc6861c618 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 36.941001] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440049 [ 36.948275] RDX: 0000000000440049 RSI: 0000000000006611 RDI: 0000000000000004 [ 36.955546] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 36.962818] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004018d0 [ 36.970089] R13: 0000000000401960 R14: 0000000000000000 R15: 0000000000000000 [ 36.977370] Modules linked in: [ 36.980701] ---[ end trace 0477cd9bf3bfe7bb ]--- [ 36.985565] RIP: 0010:rb_erase+0x306/0x3710 [ 36.989976] 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 [ 37.008920] RSP: 0018:ffff8801be57e918 EFLAGS: 00010202 [ 37.014294] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 37.021593] RDX: 1ffff10037cafd2b RSI: ffffffff8b5a08a0 RDI: 0000000000000008 [ 37.028891] RBP: ffff8801be57f320 R08: dffffc0000000000 R09: fffffbfff135d5c8 [ 37.036342] R10: fffffbfff135d5c8 R11: ffffffff89aeae43 R12: ffff8801c4c08570 [ 37.043650] R13: dffffc0000000000 R14: ffff8801be57f2f8 R15: ffff8801be57f438 [ 37.050995] FS: 0000000001e11880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 37.059265] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.065150] CR2: 0000000020000540 CR3: 00000001d937e000 CR4: 00000000001406f0 [ 37.072446] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.079741] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.087015] Kernel panic - not syncing: Fatal exception [ 37.093406] Kernel Offset: disabled [ 37.097039] Rebooting in 86400 seconds..