[....] 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. [ 25.953436] kauditd_printk_skb: 7 callbacks suppressed [ 25.953448] audit: type=1800 audit(1539328709.379:29): pid=5204 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 [ 25.978914] audit: type=1800 audit(1539328709.389:30): pid=5204 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 '10.128.10.22' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.517823] kasan: CONFIG_KASAN_INLINE enabled [ 36.522479] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.529917] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.536155] CPU: 0 PID: 5358 Comm: syz-executor320 Not tainted 4.19.0-rc6+ #138 [ 36.543582] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.552940] RIP: 0010:rb_erase+0x306/0x3710 [ 36.557263] 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 [ 36.576147] RSP: 0018:ffff8801d8cde918 EFLAGS: 00010202 [ 36.581493] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 36.588750] RDX: 1ffff1003b19bd2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 36.596002] RBP: ffff8801d8cdf320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 36.603566] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b6f57970 [ 36.610819] R13: dffffc0000000000 R14: ffff8801d8cdf2f8 R15: ffff8801d8cdf438 [ 36.618075] FS: 0000000002523880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 36.626283] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.632143] CR2: 0000000020000080 CR3: 00000001c0e18000 CR4: 00000000001406f0 [ 36.639416] Call Trace: [ 36.641990] ? lockdep_on+0x50/0x50 [ 36.645598] ? rb_insert_color+0x1460/0x1460 [ 36.649992] ? noop_count+0x40/0x40 [ 36.653598] ? lock_pin_lock+0x350/0x350 [ 36.657641] ? noop_count+0x40/0x40 [ 36.661272] ? kasan_check_read+0x11/0x20 [ 36.665404] ? noop_count+0x40/0x40 [ 36.669017] ? lock_pin_lock+0x350/0x350 [ 36.673058] ? mark_held_locks+0x130/0x130 [ 36.677275] ? check_usage_forwards+0x3e0/0x3e0 [ 36.681926] ? __bfs+0x385/0x7a0 [ 36.685275] ? noop_count+0x40/0x40 [ 36.688883] ? check_usage+0x1a9/0x790 [ 36.692781] ? lock_pin_lock+0x350/0x350 [ 36.696825] ? check_usage_forwards+0x3e0/0x3e0 [ 36.701476] ? __bfs+0x385/0x7a0 [ 36.704834] ? __lock_acquire+0x7ec/0x4ec0 [ 36.709060] ? lockdep_on+0x50/0x50 [ 36.712681] ? lock_pin_lock+0x350/0x350 [ 36.716741] ? mark_held_locks+0x130/0x130 [ 36.720970] ? kasan_check_read+0x11/0x20 [ 36.725099] ? __lock_acquire+0x2881/0x4ec0 [ 36.729411] ? mark_held_locks+0x130/0x130 [ 36.733625] ? print_usage_bug+0xc0/0xc0 [ 36.737670] ? _raw_spin_unlock+0x2c/0x50 [ 36.741798] ? graph_lock+0x170/0x170 [ 36.745583] ? ext4_exit_mballoc+0xc0/0xc0 [ 36.749801] ? __lock_acquire+0x7ec/0x4ec0 [ 36.754036] ? find_held_lock+0x36/0x1c0 [ 36.758084] ? mark_held_locks+0x130/0x130 [ 36.762307] ? lock_downgrade+0x900/0x900 [ 36.766446] ? ext4_es_scan+0x960/0x960 [ 36.770402] ? lock_release+0x970/0x970 [ 36.774358] ? do_raw_write_trylock+0x1c0/0x1c0 [ 36.779009] ? kasan_check_write+0x14/0x20 [ 36.783224] ? lock_acquire+0x1ed/0x520 [ 36.787185] ? integrity_inode_free+0x77/0x320 [ 36.791756] ? ext4_es_remove_extent+0x151/0x500 [ 36.796518] ? lock_release+0x970/0x970 [ 36.800477] ? kasan_check_write+0x14/0x20 [ 36.804699] ? do_raw_write_lock+0xbd/0x1b0 [ 36.809007] integrity_inode_free+0x12f/0x320 [ 36.813486] security_inode_free+0x19/0x90 [ 36.817714] __destroy_inode+0x328/0x820 [ 36.821773] ? generic_update_time+0x450/0x450 [ 36.826334] ? evict+0x5d8/0x980 [ 36.829683] ? lock_downgrade+0x900/0x900 [ 36.833811] ? __inode_wait_for_writeback+0x2cf/0x380 [ 36.838987] destroy_inode+0xda/0x200 [ 36.842774] ? __destroy_inode+0x820/0x820 [ 36.846991] ? kasan_check_write+0x14/0x20 [ 36.851211] ? do_raw_spin_lock+0xc1/0x200 [ 36.855441] evict+0x5e0/0x980 [ 36.858633] ? destroy_inode+0x200/0x200 [ 36.862677] ? iput+0x671/0xa90 [ 36.865938] ? lock_downgrade+0x900/0x900 [ 36.870069] ? kasan_check_read+0x11/0x20 [ 36.874202] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 36.878770] ? lock_downgrade+0x900/0x900 [ 36.882901] iput+0x679/0xa90 [ 36.885992] ? inode_add_lru+0x2a0/0x2a0 [ 36.890040] ? up_write+0x7b/0x220 [ 36.893579] ? up_read+0x110/0x110 [ 36.897108] ? up_read+0x110/0x110 [ 36.900643] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.906161] ? check_preemption_disabled+0x48/0x200 [ 36.911182] ext4_ioctl+0x236f/0x4210 [ 36.914970] ? is_bpf_text_address+0xac/0x170 [ 36.919448] ? ext4_ioctl_group_add+0x560/0x560 [ 36.924101] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 36.929878] ? kasan_check_read+0x11/0x20 [ 36.934010] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 36.939271] ? rcu_bh_qs+0xc0/0xc0 [ 36.942791] ? rcu_bh_qs+0xc0/0xc0 [ 36.946321] ? unwind_dump+0x190/0x190 [ 36.950195] ? is_bpf_text_address+0xd3/0x170 [ 36.954675] ? kernel_text_address+0x79/0xf0 [ 36.959066] ? __kernel_text_address+0xd/0x40 [ 36.963544] ? unwind_get_return_address+0x61/0xa0 [ 36.967180] kobject: 'regulatory.0' (00000000459f85c5): kobject_uevent_env [ 36.968485] ? __save_stack_trace+0x8d/0xf0 [ 36.968516] ? save_stack+0xa9/0xd0 [ 36.975534] kobject: 'regulatory.0' (00000000459f85c5): fill_kobj_path: path = '/devices/platform/regulatory.0' [ 36.979833] ? save_stack+0x43/0xd0 [ 36.979848] ? __kasan_slab_free+0x102/0x150 [ 36.979858] ? kasan_slab_free+0xe/0x10 [ 36.979872] ? kmem_cache_free+0x83/0x290 [ 36.979884] ? putname+0xf2/0x130 [ 36.979901] ? do_sys_open+0x54d/0x700 [ 37.017266] ? __x64_sys_openat+0x9d/0x100 [ 37.021496] ? do_syscall_64+0x1b9/0x820 [ 37.025555] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.030922] ? trace_hardirqs_off+0xb8/0x310 [ 37.035324] ? kasan_check_read+0x11/0x20 [ 37.039476] ? do_raw_spin_unlock+0xa7/0x2f0 [ 37.043883] ? trace_hardirqs_on+0x310/0x310 [ 37.048289] ? kasan_check_write+0x14/0x20 [ 37.052525] ? trace_hardirqs_off+0xb8/0x310 [ 37.056932] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.062465] ? check_preemption_disabled+0x48/0x200 [ 37.067478] ? check_preemption_disabled+0x48/0x200 [ 37.072521] ? ext4_ioctl_group_add+0x560/0x560 [ 37.077185] do_vfs_ioctl+0x1de/0x1720 [ 37.081067] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 37.086350] ? ioctl_preallocate+0x300/0x300 [ 37.090759] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.096378] ? __fget_light+0x2e9/0x430 [ 37.100374] ? fget_raw+0x20/0x20 [ 37.103827] ? putname+0xf2/0x130 [ 37.107279] ? rcu_read_lock_sched_held+0x108/0x120 [ 37.112291] ? kmem_cache_free+0x24f/0x290 [ 37.116536] ? putname+0xf7/0x130 [ 37.119990] ? do_syscall_64+0x9a/0x820 [ 37.123968] ? do_syscall_64+0x9a/0x820 [ 37.127935] ? lockdep_hardirqs_on+0x421/0x5c0 [ 37.132514] ? security_file_ioctl+0x94/0xc0 [ 37.136944] ksys_ioctl+0xa9/0xd0 [ 37.140395] __x64_sys_ioctl+0x73/0xb0 [ 37.144282] do_syscall_64+0x1b9/0x820 [ 37.148176] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.153551] ? syscall_return_slowpath+0x5e0/0x5e0 [ 37.158498] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.163357] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.168370] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.173380] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.178393] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.183237] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.188420] RIP: 0033:0x440009 [ 37.191612] 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 [ 37.210506] RSP: 002b:00007ffce7bac688 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 37.218209] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 37.225469] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 37.232758] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 37.240027] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 37.247287] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 37.254550] Modules linked in: [ 37.258065] ---[ end trace 03e2e8a227edd951 ]--- [ 37.262853] RIP: 0010:rb_erase+0x306/0x3710 [ 37.267199] 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 [ 37.286116] RSP: 0018:ffff8801d8cde918 EFLAGS: 00010202 [ 37.291495] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 37.298785] RDX: 1ffff1003b19bd2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 37.306053] RBP: ffff8801d8cdf320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 37.313332] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b6f57970 [ 37.320612] R13: dffffc0000000000 R14: ffff8801d8cdf2f8 R15: ffff8801d8cdf438 [ 37.327898] FS: 0000000002523880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 37.336120] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.342014] CR2: 0000000020000080 CR3: 00000001c0e18000 CR4: 00000000001406f0 [ 37.349299] Kernel panic - not syncing: Fatal exception [ 37.355474] Kernel Offset: disabled [ 37.359098] Rebooting in 86400 seconds..