[....] 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. [ 26.115511] kauditd_printk_skb: 7 callbacks suppressed [ 26.115523] audit: type=1800 audit(1540281997.925:29): pid=5210 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 [ 26.140696] audit: type=1800 audit(1540281997.935:30): pid=5210 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 '10.128.0.37' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.118859] kasan: CONFIG_KASAN_INLINE enabled [ 36.123531] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.130984] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.137219] CPU: 0 PID: 5364 Comm: syz-executor644 Not tainted 4.19.0+ #298 [ 36.144294] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.153644] RIP: 0010:rb_erase+0x306/0x3710 [ 36.157953] 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 [ 36.176838] RSP: 0018:ffff8801bb16e918 EFLAGS: 00010202 [ 36.182180] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 36.189431] RDX: 1ffff1003762dd2b RSI: ffffffff8afc0860 RDI: 0000000000000008 [ 36.196680] RBP: ffff8801bb16f320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 36.203929] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801c5447230 [ 36.211179] R13: dffffc0000000000 R14: ffff8801bb16f2f8 R15: ffff8801bb16f438 [ 36.218445] FS: 0000000000ac6880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 36.226654] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.232516] CR2: 0000000020000080 CR3: 00000001d859f000 CR4: 00000000001406f0 [ 36.239768] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.247020] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.254268] Call Trace: [ 36.256856] ? lockdep_on+0x50/0x50 [ 36.260469] ? rb_insert_color+0x1460/0x1460 [ 36.264859] ? lock_downgrade+0x900/0x900 [ 36.268987] ? noop_count+0x40/0x40 [ 36.272594] ? lock_pin_lock+0x350/0x350 [ 36.276638] ? rcu_bh_qs+0xc0/0xc0 [ 36.280160] ? unwind_dump+0x190/0x190 [ 36.284063] ? kasan_check_read+0x11/0x20 [ 36.288197] ? noop_count+0x40/0x40 [ 36.291803] ? lock_pin_lock+0x350/0x350 [ 36.295853] ? mark_held_locks+0x130/0x130 [ 36.300075] ? check_usage_forwards+0x3e0/0x3e0 [ 36.304724] ? __bfs+0x385/0x7a0 [ 36.308104] ? check_usage+0x1a9/0x790 [ 36.311980] ? lock_pin_lock+0x350/0x350 [ 36.316024] ? check_usage_forwards+0x3e0/0x3e0 [ 36.320672] ? __bfs+0x385/0x7a0 [ 36.324037] ? modules_open+0xa0/0xa0 [ 36.327818] ? lockdep_on+0x50/0x50 [ 36.331425] ? lock_pin_lock+0x350/0x350 [ 36.335471] ? mark_held_locks+0x130/0x130 [ 36.339702] ? kasan_check_read+0x11/0x20 [ 36.343829] ? __lock_acquire+0x2881/0x4ec0 [ 36.348135] ? mark_held_locks+0x130/0x130 [ 36.352350] ? print_usage_bug+0xc0/0xc0 [ 36.356391] ? _raw_spin_unlock+0x2c/0x50 [ 36.360537] ? graph_lock+0x170/0x170 [ 36.364335] ? ext4_exit_mballoc+0xc0/0xc0 [ 36.368561] ? __lock_acquire+0x7ec/0x4ec0 [ 36.372783] ? find_held_lock+0x36/0x1c0 [ 36.376827] ? mark_held_locks+0x130/0x130 [ 36.381043] ? lock_downgrade+0x900/0x900 [ 36.385174] ? ext4_es_scan+0x960/0x960 [ 36.389135] ? do_raw_write_trylock+0x1c0/0x1c0 [ 36.393788] ? kasan_check_write+0x14/0x20 [ 36.398005] ? lock_acquire+0x1ed/0x520 [ 36.401960] ? integrity_inode_free+0x77/0x320 [ 36.406525] ? ext4_es_remove_extent+0x151/0x500 [ 36.411263] ? lock_release+0x970/0x970 [ 36.415266] ? kasan_check_write+0x14/0x20 [ 36.419485] ? do_raw_write_lock+0xbd/0x1e0 [ 36.423808] integrity_inode_free+0x12f/0x320 [ 36.428289] security_inode_free+0x19/0x90 [ 36.432521] __destroy_inode+0x328/0x820 [ 36.436575] ? generic_update_time+0x450/0x450 [ 36.441137] ? evict+0x5d8/0x980 [ 36.444484] ? lock_downgrade+0x900/0x900 [ 36.448631] ? __inode_wait_for_writeback+0x2cf/0x380 [ 36.453803] destroy_inode+0xda/0x200 [ 36.457591] ? __destroy_inode+0x820/0x820 [ 36.461807] ? kasan_check_write+0x14/0x20 [ 36.466027] ? do_raw_spin_lock+0xc1/0x230 [ 36.470246] evict+0x5e0/0x980 [ 36.473420] ? destroy_inode+0x200/0x200 [ 36.477465] ? iput+0x671/0xa90 [ 36.480726] ? lock_downgrade+0x900/0x900 [ 36.484859] ? kasan_check_read+0x11/0x20 [ 36.488991] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 36.493560] ? lock_downgrade+0x900/0x900 [ 36.497697] iput+0x679/0xa90 [ 36.500782] ? inode_add_lru+0x2a0/0x2a0 [ 36.504823] ? up_write+0x7b/0x220 [ 36.508343] ? up_read+0x110/0x110 [ 36.511876] ? up_read+0x110/0x110 [ 36.515399] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.520917] ? check_preemption_disabled+0x48/0x280 [ 36.525920] ext4_ioctl+0x236f/0x4210 [ 36.529719] ? is_bpf_text_address+0xac/0x170 [ 36.534194] ? ext4_ioctl_group_add+0x560/0x560 [ 36.538849] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 36.544630] ? kasan_check_read+0x11/0x20 [ 36.548761] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 36.554020] ? rcu_bh_qs+0xc0/0xc0 [ 36.557546] ? rcu_bh_qs+0xc0/0xc0 [ 36.561078] ? unwind_dump+0x190/0x190 [ 36.564952] ? is_bpf_text_address+0xd3/0x170 [ 36.569431] ? kernel_text_address+0x79/0xf0 [ 36.573821] ? __kernel_text_address+0xd/0x40 [ 36.578299] ? unwind_get_return_address+0x61/0xa0 [ 36.583212] ? __save_stack_trace+0x8d/0xf0 [ 36.587518] ? save_stack+0xa9/0xd0 [ 36.591122] ? save_stack+0x43/0xd0 [ 36.594727] ? __kasan_slab_free+0x102/0x150 [ 36.599115] ? kasan_slab_free+0xe/0x10 [ 36.603076] ? kmem_cache_free+0x83/0x290 [ 36.607208] ? putname+0xf2/0x130 [ 36.610643] ? do_sys_open+0x54d/0x700 [ 36.614508] ? __x64_sys_openat+0x9d/0x100 [ 36.618726] ? do_syscall_64+0x1b9/0x820 [ 36.622771] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.628121] ? trace_hardirqs_off+0xb8/0x310 [ 36.632507] ? kasan_check_read+0x11/0x20 [ 36.636637] ? do_raw_spin_unlock+0xa7/0x330 [ 36.641025] ? trace_hardirqs_on+0x310/0x310 [ 36.645415] ? kasan_check_write+0x14/0x20 [ 36.649634] ? trace_hardirqs_off+0xb8/0x310 [ 36.654023] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.659543] ? check_preemption_disabled+0x48/0x280 [ 36.664546] ? check_preemption_disabled+0x48/0x280 [ 36.669558] ? ext4_ioctl_group_add+0x560/0x560 [ 36.674212] do_vfs_ioctl+0x1de/0x1720 [ 36.678088] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 36.683348] ? ioctl_preallocate+0x300/0x300 [ 36.687737] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.693273] ? __fget_light+0x2e9/0x430 [ 36.697231] ? fget_raw+0x20/0x20 [ 36.700665] ? putname+0xf2/0x130 [ 36.704100] ? rcu_read_lock_sched_held+0x108/0x120 [ 36.709098] ? kmem_cache_free+0x24f/0x290 [ 36.713327] ? putname+0xf7/0x130 [ 36.716763] ? do_syscall_64+0x9a/0x820 [ 36.720721] ? do_syscall_64+0x9a/0x820 [ 36.724674] ? lockdep_hardirqs_on+0x421/0x5c0 [ 36.729241] ? security_file_ioctl+0x94/0xc0 [ 36.733632] ksys_ioctl+0xa9/0xd0 [ 36.737068] __x64_sys_ioctl+0x73/0xb0 [ 36.740939] do_syscall_64+0x1b9/0x820 [ 36.744809] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 36.750155] ? syscall_return_slowpath+0x5e0/0x5e0 [ 36.755063] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.759892] ? trace_hardirqs_on_caller+0x310/0x310 [ 36.764887] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 36.769885] ? prepare_exit_to_usermode+0x291/0x3b0 [ 36.774884] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.779710] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.784880] RIP: 0033:0x440009 [ 36.788059] 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 [ 36.795916] kobject: 'regulatory.0' (000000009162965e): kobject_uevent_env [ 36.806946] RSP: 002b:00007ffe2422e3b8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 36.806962] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 36.806970] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 36.806978] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 36.806985] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 36.806998] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 36.814053] kobject: 'regulatory.0' (000000009162965e): fill_kobj_path: path = '/devices/platform/regulatory.0' [ 36.821706] Modules linked in: [ 36.821869] ---[ end trace 92b490a5f68a1fc1 ]--- [ 36.876309] RIP: 0010:rb_erase+0x306/0x3710 [ 36.880632] 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 [ 36.899562] RSP: 0018:ffff8801bb16e918 EFLAGS: 00010202 [ 36.904925] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 36.912205] RDX: 1ffff1003762dd2b RSI: ffffffff8afc0860 RDI: 0000000000000008 [ 36.919485] RBP: ffff8801bb16f320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 36.926767] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801c5447230 [ 36.934032] R13: dffffc0000000000 R14: ffff8801bb16f2f8 R15: ffff8801bb16f438 [ 36.941314] FS: 0000000000ac6880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 36.949551] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.955437] CR2: 0000000020000080 CR3: 00000001d859f000 CR4: 00000000001406f0 [ 36.962717] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.969998] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.977280] Kernel panic - not syncing: Fatal exception [ 36.983511] Kernel Offset: disabled [ 36.987130] Rebooting in 86400 seconds..