[....] 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. [ 26.897099] kauditd_printk_skb: 7 callbacks suppressed [ 26.897110] audit: type=1800 audit(1540112637.284:29): pid=5233 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 26.930345] audit: type=1800 audit(1540112637.294:30): pid=5233 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 '10.128.10.32' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.224696] kasan: CONFIG_KASAN_INLINE enabled [ 36.229452] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.236805] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.243018] CPU: 0 PID: 5386 Comm: syz-executor271 Not tainted 4.19.0-rc8+ #71 [ 36.250359] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.259890] RIP: 0010:rb_erase+0x306/0x3710 [ 36.264196] 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 [ 36.283082] RSP: 0018:ffff8801d7fae918 EFLAGS: 00010202 [ 36.288427] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 36.295680] RDX: 1ffff1003aff5d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 36.302931] RBP: ffff8801d7faf320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 36.310181] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b66f4930 [ 36.317430] R13: dffffc0000000000 R14: ffff8801d7faf2f8 R15: ffff8801d7faf438 [ 36.324685] FS: 000000000236b880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 36.332889] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.338751] CR2: 0000000020000080 CR3: 00000001d7e4a000 CR4: 00000000001406f0 [ 36.346006] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.353258] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.360508] Call Trace: [ 36.363084] ? lockdep_on+0x50/0x50 [ 36.366710] ? rb_insert_color+0x1460/0x1460 [ 36.371101] ? lock_downgrade+0x900/0x900 [ 36.375233] ? noop_count+0x40/0x40 [ 36.378843] ? lock_pin_lock+0x350/0x350 [ 36.383120] ? rcu_bh_qs+0xc0/0xc0 [ 36.386643] ? unwind_dump+0x190/0x190 [ 36.390517] ? kasan_check_read+0x11/0x20 [ 36.394649] ? noop_count+0x40/0x40 [ 36.398259] ? lock_pin_lock+0x350/0x350 [ 36.402304] ? mark_held_locks+0x130/0x130 [ 36.406521] ? check_usage_forwards+0x3e0/0x3e0 [ 36.411173] ? __bfs+0x385/0x7a0 [ 36.414521] ? check_usage+0x1a9/0x790 [ 36.418405] ? lock_pin_lock+0x350/0x350 [ 36.422454] ? check_usage_forwards+0x3e0/0x3e0 [ 36.427102] ? __bfs+0x385/0x7a0 [ 36.430451] ? lockdep_on+0x50/0x50 [ 36.434063] ? lock_pin_lock+0x350/0x350 [ 36.438113] ? mark_held_locks+0x130/0x130 [ 36.442332] ? kasan_check_read+0x11/0x20 [ 36.446463] ? __lock_acquire+0x2881/0x4ec0 [ 36.450770] ? mark_held_locks+0x130/0x130 [ 36.454987] ? print_usage_bug+0xc0/0xc0 [ 36.459033] ? _raw_spin_unlock+0x2c/0x50 [ 36.463164] ? graph_lock+0x170/0x170 [ 36.466967] ? ext4_exit_mballoc+0xc0/0xc0 [ 36.471189] ? __lock_acquire+0x7ec/0x4ec0 [ 36.475407] ? find_held_lock+0x36/0x1c0 [ 36.479452] ? mark_held_locks+0x130/0x130 [ 36.483667] ? lock_downgrade+0x900/0x900 [ 36.487795] ? ext4_es_scan+0x960/0x960 [ 36.491749] ? lock_release+0x970/0x970 [ 36.495707] ? do_raw_write_trylock+0x1c0/0x1c0 [ 36.500363] ? kasan_check_write+0x14/0x20 [ 36.504586] ? lock_acquire+0x1ed/0x520 [ 36.508544] ? integrity_inode_free+0x77/0x320 [ 36.513123] ? ext4_es_remove_extent+0x151/0x500 [ 36.517883] ? lock_release+0x970/0x970 [ 36.521857] ? kasan_check_write+0x14/0x20 [ 36.526110] ? do_raw_write_lock+0xbd/0x1e0 [ 36.530420] integrity_inode_free+0x12f/0x320 [ 36.534901] security_inode_free+0x19/0x90 [ 36.539122] __destroy_inode+0x328/0x820 [ 36.543166] ? generic_update_time+0x450/0x450 [ 36.547724] ? evict+0x5d8/0x980 [ 36.551073] ? lock_downgrade+0x900/0x900 [ 36.555202] ? __inode_wait_for_writeback+0x2cf/0x380 [ 36.560376] destroy_inode+0xda/0x200 [ 36.564158] ? __destroy_inode+0x820/0x820 [ 36.568376] ? kasan_check_write+0x14/0x20 [ 36.572598] ? do_raw_spin_lock+0xc1/0x230 [ 36.576812] evict+0x5e0/0x980 [ 36.579991] ? destroy_inode+0x200/0x200 [ 36.584031] ? iput+0x671/0xa90 [ 36.587288] ? lock_downgrade+0x900/0x900 [ 36.591419] ? kasan_check_read+0x11/0x20 [ 36.595549] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 36.600126] ? lock_downgrade+0x900/0x900 [ 36.604258] iput+0x679/0xa90 [ 36.607346] ? inode_add_lru+0x2a0/0x2a0 [ 36.611391] ? up_write+0x7b/0x220 [ 36.614912] ? up_read+0x110/0x110 [ 36.618434] ? up_read+0x110/0x110 [ 36.621959] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.627477] ? check_preemption_disabled+0x48/0x280 [ 36.632480] ext4_ioctl+0x236f/0x4210 [ 36.636264] ? is_bpf_text_address+0xac/0x170 [ 36.640741] ? ext4_ioctl_group_add+0x560/0x560 [ 36.645394] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 36.651175] ? kasan_check_read+0x11/0x20 [ 36.655304] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 36.660569] ? rcu_bh_qs+0xc0/0xc0 [ 36.664099] ? rcu_bh_qs+0xc0/0xc0 [ 36.667618] ? unwind_dump+0x190/0x190 [ 36.671493] ? is_bpf_text_address+0xd3/0x170 [ 36.675970] ? kernel_text_address+0x79/0xf0 [ 36.680363] ? __kernel_text_address+0xd/0x40 [ 36.684840] ? unwind_get_return_address+0x61/0xa0 [ 36.689752] ? __save_stack_trace+0x8d/0xf0 [ 36.694058] ? save_stack+0xa9/0xd0 [ 36.697664] ? save_stack+0x43/0xd0 [ 36.701273] ? __kasan_slab_free+0x102/0x150 [ 36.705662] ? kasan_slab_free+0xe/0x10 [ 36.709619] ? kmem_cache_free+0x83/0x290 [ 36.713748] ? putname+0xf2/0x130 [ 36.717183] ? do_sys_open+0x54d/0x700 [ 36.721050] ? __x64_sys_openat+0x9d/0x100 [ 36.725268] ? do_syscall_64+0x1b9/0x820 [ 36.729312] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.734657] ? trace_hardirqs_off+0xb8/0x310 [ 36.739047] ? kasan_check_read+0x11/0x20 [ 36.743179] ? do_raw_spin_unlock+0xa7/0x330 [ 36.747578] ? trace_hardirqs_on+0x310/0x310 [ 36.751972] ? kasan_check_write+0x14/0x20 [ 36.756205] ? trace_hardirqs_off+0xb8/0x310 [ 36.760599] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.766119] ? check_preemption_disabled+0x48/0x280 [ 36.771118] ? check_preemption_disabled+0x48/0x280 [ 36.776130] ? ext4_ioctl_group_add+0x560/0x560 [ 36.780782] do_vfs_ioctl+0x1de/0x1720 [ 36.784656] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 36.789918] ? ioctl_preallocate+0x300/0x300 [ 36.794308] ? memset+0x31/0x40 [ 36.797594] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.803131] ? smack_file_ioctl+0x210/0x3c0 [ 36.807435] ? fget_raw+0x20/0x20 [ 36.810884] ? smack_file_lock+0x2e0/0x2e0 [ 36.815109] ? do_syscall_64+0x9a/0x820 [ 36.819082] ? do_syscall_64+0x9a/0x820 [ 36.823039] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.828558] ? security_file_ioctl+0x94/0xc0 [ 36.832963] ksys_ioctl+0xa9/0xd0 [ 36.836396] __x64_sys_ioctl+0x73/0xb0 [ 36.840268] do_syscall_64+0x1b9/0x820 [ 36.844135] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 36.849479] ? syscall_return_slowpath+0x5e0/0x5e0 [ 36.854390] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.859215] ? trace_hardirqs_on_caller+0x310/0x310 [ 36.864210] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 36.869209] ? prepare_exit_to_usermode+0x291/0x3b0 [ 36.874206] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.879033] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.884201] RIP: 0033:0x440009 [ 36.887376] 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 [ 36.906258] RSP: 002b:00007ffe48305488 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 36.913949] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 36.921199] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 36.928450] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 36.935703] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 36.942955] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 36.950221] Modules linked in: [ 36.953520] ---[ end trace fc7a12a9088939a3 ]--- [ 36.958339] RIP: 0010:rb_erase+0x306/0x3710 [ 36.962665] 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 [ 36.981654] RSP: 0018:ffff8801d7fae918 EFLAGS: 00010202 [ 36.987023] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 36.994330] RDX: 1ffff1003aff5d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 37.001688] RBP: ffff8801d7faf320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 37.008976] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b66f4930 [ 37.016246] R13: dffffc0000000000 R14: ffff8801d7faf2f8 R15: ffff8801d7faf438 [ 37.017970] kobject: 'regulatory.0' (000000009ffd694a): kobject_uevent_env [ 37.023541] FS: 000000000236b880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 37.030880] kobject: 'regulatory.0' (000000009ffd694a): fill_kobj_path: path = '/devices/platform/regulatory.0' [ 37.038784] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.038799] CR2: 0000000020000080 CR3: 00000001d7e4a000 CR4: 00000000001406f0 [ 37.062177] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.069460] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.076726] Kernel panic - not syncing: Fatal exception [ 37.082917] Kernel Offset: disabled [ 37.086556] Rebooting in 86400 seconds..