[....] 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. [ 26.708192] kauditd_printk_skb: 8 callbacks suppressed [ 26.708204] audit: type=1800 audit(1540199664.795:29): pid=5243 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 26.734766] audit: type=1800 audit(1540199664.795:30): pid=5243 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 '10.128.0.23' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 47.428607] kasan: CONFIG_KASAN_INLINE enabled [ 47.433486] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 47.440909] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 47.447172] CPU: 1 PID: 5399 Comm: syz-executor915 Not tainted 4.19.0-rc8+ #73 [ 47.454612] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.463959] RIP: 0010:rb_erase+0x306/0x3710 [ 47.468268] 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 [ 47.487155] RSP: 0018:ffff8801c51c6918 EFLAGS: 00010202 [ 47.492498] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 47.499810] RDX: 1ffff10038a38d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 47.507069] RBP: ffff8801c51c7320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 47.514320] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b66e4970 [ 47.521573] R13: dffffc0000000000 R14: ffff8801c51c72f8 R15: ffff8801c51c7438 [ 47.528825] FS: 0000000000c1d880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 47.537036] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.542895] CR2: 0000000020000080 CR3: 00000001d8847000 CR4: 00000000001406e0 [ 47.550150] Call Trace: [ 47.552727] ? lockdep_on+0x50/0x50 [ 47.556344] ? rb_insert_color+0x1460/0x1460 [ 47.560785] ? noop_count+0x40/0x40 [ 47.564451] ? lock_pin_lock+0x350/0x350 [ 47.568508] ? kasan_check_read+0x11/0x20 [ 47.572640] ? noop_count+0x40/0x40 [ 47.576247] ? lock_pin_lock+0x350/0x350 [ 47.580301] ? mark_held_locks+0x130/0x130 [ 47.584529] ? check_usage_forwards+0x3e0/0x3e0 [ 47.589188] ? __bfs+0x385/0x7a0 [ 47.592595] ? noop_count+0x40/0x40 [ 47.596217] ? check_usage+0x1a9/0x790 [ 47.600089] ? lock_pin_lock+0x350/0x350 [ 47.604194] ? check_usage_forwards+0x3e0/0x3e0 [ 47.608859] ? __bfs+0x385/0x7a0 [ 47.612213] ? modules_open+0xa0/0xa0 [ 47.615995] ? lockdep_on+0x50/0x50 [ 47.619608] ? lock_pin_lock+0x350/0x350 [ 47.623673] ? mark_held_locks+0x130/0x130 [ 47.627891] ? kasan_check_read+0x11/0x20 [ 47.632024] ? __lock_acquire+0x2881/0x4ec0 [ 47.636329] ? mark_held_locks+0x130/0x130 [ 47.640559] ? print_usage_bug+0xc0/0xc0 [ 47.644609] ? _raw_spin_unlock+0x2c/0x50 [ 47.648739] ? graph_lock+0x170/0x170 [ 47.652575] ? ext4_exit_mballoc+0xc0/0xc0 [ 47.656801] ? __lock_acquire+0x7ec/0x4ec0 [ 47.661025] ? find_held_lock+0x36/0x1c0 [ 47.665070] ? mark_held_locks+0x130/0x130 [ 47.669285] ? lock_downgrade+0x900/0x900 [ 47.673475] ? ext4_es_scan+0x960/0x960 [ 47.677440] ? lock_release+0x970/0x970 [ 47.681445] ? do_raw_write_trylock+0x1c0/0x1c0 [ 47.686106] ? kasan_check_write+0x14/0x20 [ 47.690322] ? lock_acquire+0x1ed/0x520 [ 47.694391] ? integrity_inode_free+0x77/0x320 [ 47.698969] ? ext4_es_remove_extent+0x151/0x500 [ 47.703712] ? lock_release+0x970/0x970 [ 47.707675] ? kasan_check_write+0x14/0x20 [ 47.711893] ? do_raw_write_lock+0xbd/0x1e0 [ 47.716198] integrity_inode_free+0x12f/0x320 [ 47.720676] security_inode_free+0x19/0x90 [ 47.724905] __destroy_inode+0x328/0x820 [ 47.728950] ? generic_update_time+0x450/0x450 [ 47.733514] ? evict+0x5d8/0x980 [ 47.736866] ? lock_downgrade+0x900/0x900 [ 47.741029] ? __inode_wait_for_writeback+0x2cf/0x380 [ 47.746261] destroy_inode+0xda/0x200 [ 47.750049] ? __destroy_inode+0x820/0x820 [ 47.754272] ? kasan_check_write+0x14/0x20 [ 47.758493] ? do_raw_spin_lock+0xc1/0x230 [ 47.762772] evict+0x5e0/0x980 [ 47.765958] ? destroy_inode+0x200/0x200 [ 47.770011] ? iput+0x671/0xa90 [ 47.773271] ? lock_downgrade+0x900/0x900 [ 47.777402] ? kasan_check_read+0x11/0x20 [ 47.781535] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 47.786105] ? lock_downgrade+0x900/0x900 [ 47.790238] iput+0x679/0xa90 [ 47.793325] ? inode_add_lru+0x2a0/0x2a0 [ 47.797368] ? up_write+0x7b/0x220 [ 47.800890] ? up_read+0x110/0x110 [ 47.804410] ? up_read+0x110/0x110 [ 47.807934] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.813458] ? check_preemption_disabled+0x48/0x280 [ 47.818460] ext4_ioctl+0x236f/0x4210 [ 47.822289] ? is_bpf_text_address+0xac/0x170 [ 47.826777] ? ext4_ioctl_group_add+0x560/0x560 [ 47.831429] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 47.837212] ? kasan_check_read+0x11/0x20 [ 47.841348] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 47.846613] ? rcu_bh_qs+0xc0/0xc0 [ 47.850141] ? rcu_bh_qs+0xc0/0xc0 [ 47.853668] ? unwind_dump+0x190/0x190 [ 47.857539] ? is_bpf_text_address+0xd3/0x170 [ 47.862025] ? kernel_text_address+0x79/0xf0 [ 47.866413] ? __kernel_text_address+0xd/0x40 [ 47.870889] ? unwind_get_return_address+0x61/0xa0 [ 47.875804] ? __save_stack_trace+0x8d/0xf0 [ 47.880182] ? save_stack+0xa9/0xd0 [ 47.883797] ? save_stack+0x43/0xd0 [ 47.887443] ? __kasan_slab_free+0x102/0x150 [ 47.891841] ? kasan_slab_free+0xe/0x10 [ 47.895797] ? kmem_cache_free+0x83/0x290 [ 47.899930] ? putname+0xf2/0x130 [ 47.903372] ? do_sys_open+0x54d/0x700 [ 47.907242] ? __x64_sys_openat+0x9d/0x100 [ 47.911466] ? do_syscall_64+0x1b9/0x820 [ 47.915511] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.920905] ? trace_hardirqs_off+0xb8/0x310 [ 47.925301] ? kasan_check_read+0x11/0x20 [ 47.929432] ? do_raw_spin_unlock+0xa7/0x330 [ 47.933825] ? trace_hardirqs_on+0x310/0x310 [ 47.938216] ? kasan_check_write+0x14/0x20 [ 47.942438] ? trace_hardirqs_off+0xb8/0x310 [ 47.946833] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.952355] ? check_preemption_disabled+0x48/0x280 [ 47.957413] ? check_preemption_disabled+0x48/0x280 [ 47.962423] ? ext4_ioctl_group_add+0x560/0x560 [ 47.967083] do_vfs_ioctl+0x1de/0x1720 [ 47.971004] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 47.976270] ? ioctl_preallocate+0x300/0x300 [ 47.980659] ? memset+0x31/0x40 [ 47.983919] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.989441] ? smack_file_ioctl+0x210/0x3c0 [ 47.993744] ? fget_raw+0x20/0x20 [ 47.997223] ? smack_file_lock+0x2e0/0x2e0 [ 48.001451] ? do_syscall_64+0x9a/0x820 [ 48.005452] ? do_syscall_64+0x9a/0x820 [ 48.009415] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.014934] ? security_file_ioctl+0x94/0xc0 [ 48.019329] ksys_ioctl+0xa9/0xd0 [ 48.022774] __x64_sys_ioctl+0x73/0xb0 [ 48.026654] do_syscall_64+0x1b9/0x820 [ 48.030522] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 48.035868] ? syscall_return_slowpath+0x5e0/0x5e0 [ 48.040821] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.045653] ? trace_hardirqs_on_caller+0x310/0x310 [ 48.050650] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 48.055654] ? prepare_exit_to_usermode+0x291/0x3b0 [ 48.060656] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.065483] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.070652] RIP: 0033:0x440009 [ 48.073834] 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 [ 48.092719] RSP: 002b:00007ffe603439e8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 48.100410] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 48.107660] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 48.114908] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 48.122156] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 48.129449] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 48.136715] Modules linked in: [ 48.140081] ---[ end trace e4126d4bb93df6b4 ]--- [ 48.144838] RIP: 0010:rb_erase+0x306/0x3710 [ 48.149245] 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 [ 48.168176] RSP: 0018:ffff8801c51c6918 EFLAGS: 00010202 [ 48.173541] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 48.180833] RDX: 1ffff10038a38d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 48.188091] RBP: ffff8801c51c7320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 48.195372] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b66e4970 [ 48.202687] R13: dffffc0000000000 R14: ffff8801c51c72f8 R15: ffff8801c51c7438 [ 48.209987] FS: 0000000000c1d880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 48.218241] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.224180] CR2: 0000000020000080 CR3: 00000001d8847000 CR4: 00000000001406e0 [ 48.231463] Kernel panic - not syncing: Fatal exception [ 48.237670] Kernel Offset: disabled [ 48.241294] Rebooting in 86400 seconds..