[ 37.413890] audit: type=1800 audit(1539277109.222:22): pid=5693 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0 [ 37.439344] audit: type=1800 audit(1539277109.222:23): pid=5693 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rsyslog" dev="sda1" ino=2442 res=0 [ 37.465056] audit: type=1800 audit(1539277109.232:24): pid=5693 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="sudo" dev="sda1" ino=2454 res=0 [....] 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.20' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 48.768130] kasan: CONFIG_KASAN_INLINE enabled [ 48.772722] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 48.780138] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 48.786399] CPU: 0 PID: 5847 Comm: syz-executor300 Not tainted 4.19.0-rc7+ #55 [ 48.793740] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.803086] RIP: 0010:rb_erase+0x306/0x3710 [ 48.807404] 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 [ 48.826293] RSP: 0018:ffff8801c156e918 EFLAGS: 00010202 [ 48.831639] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 48.838932] RDX: 1ffff100382add2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 48.846192] RBP: ffff8801c156f320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 48.853444] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b8a5a1f0 [ 48.860698] R13: dffffc0000000000 R14: ffff8801c156f2f8 R15: ffff8801c156f438 [ 48.867951] FS: 00000000013f4880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 48.876165] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.882026] CR2: 0000000020000080 CR3: 00000001bba53000 CR4: 00000000001406f0 [ 48.889277] Call Trace: [ 48.891861] ? rb_insert_color+0x1460/0x1460 [ 48.896262] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 48.901177] ? lock_downgrade+0x900/0x900 [ 48.905365] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 48.911157] ? mark_held_locks+0x130/0x130 [ 48.915394] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 48.920657] ? rcu_bh_qs+0xc0/0xc0 [ 48.924181] ? unwind_dump+0x190/0x190 [ 48.928064] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 48.933588] ? mark_held_locks+0x130/0x130 [ 48.937808] ? mark_page_accessed+0xcb0/0x2040 [ 48.942383] ? activate_page+0x1040/0x1040 [ 48.946607] ? activate_page+0x1040/0x1040 [ 48.950832] ? mark_held_locks+0x130/0x130 [ 48.955048] ? kasan_kmalloc+0xc7/0xe0 [ 48.958919] ? kmem_cache_alloc_trace+0x152/0x750 [ 48.963743] ? ima_add_digest_entry+0xcb/0x6a0 [ 48.968307] ? ima_add_template_entry+0x466/0x7f0 [ 48.973133] ? ima_store_template+0x224/0x310 [ 48.977614] ? pagecache_get_page+0x2d8/0xf00 [ 48.982096] ? find_get_pages_contig+0x15b0/0x15b0 [ 48.987018] ? is_bpf_text_address+0xac/0x170 [ 48.991502] ? lock_downgrade+0x900/0x900 [ 48.995673] ? mark_held_locks+0x130/0x130 [ 48.999933] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 49.005717] ? mark_held_locks+0x130/0x130 [ 49.009948] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 49.015294] ? lock_downgrade+0x900/0x900 [ 49.019428] ? kasan_check_read+0x11/0x20 [ 49.023561] ? do_raw_spin_unlock+0xa7/0x2f0 [ 49.028017] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 49.032591] ? mark_held_locks+0x130/0x130 [ 49.036819] ? _raw_spin_unlock+0x2c/0x50 [ 49.040953] ? ext4_discard_preallocations+0x18a/0x13c0 [ 49.046303] ? trace_hardirqs_on+0xbd/0x310 [ 49.050610] ? ext4_exit_mballoc+0xc0/0xc0 [ 49.054832] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 49.059839] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 49.064579] ? modules_open+0xa0/0xa0 [ 49.068379] ? __es_tree_search.isra.12+0x1ba/0x220 [ 49.073380] ? __es_remove_extent+0x9a3/0xba0 [ 49.077862] ? mark_held_locks+0x130/0x130 [ 49.082077] ? lock_downgrade+0x900/0x900 [ 49.086207] ? ext4_es_scan+0x960/0x960 [ 49.090162] ? lock_release+0x970/0x970 [ 49.094120] ? trace_hardirqs_on+0xbd/0x310 [ 49.098422] ? kasan_check_read+0x11/0x20 [ 49.102598] ? clear_inode+0x114/0x3a0 [ 49.106616] ? do_raw_write_trylock+0x1c0/0x1c0 [ 49.111273] ? kasan_check_write+0x14/0x20 [ 49.115492] ? lock_acquire+0x1ed/0x520 [ 49.119452] ? integrity_inode_free+0x77/0x320 [ 49.124016] ? ext4_es_remove_extent+0x151/0x500 [ 49.128754] ? lock_release+0x970/0x970 [ 49.132720] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 49.137810] ? depot_save_stack+0x292/0x470 [ 49.142118] ? kasan_check_write+0x14/0x20 [ 49.146336] ? do_raw_write_lock+0xbd/0x1b0 [ 49.150651] integrity_inode_free+0x12f/0x320 [ 49.155130] security_inode_free+0x19/0x90 [ 49.159356] __destroy_inode+0x328/0x820 [ 49.163404] ? generic_update_time+0x450/0x450 [ 49.167970] ? evict+0x5d8/0x980 [ 49.171326] ? lock_downgrade+0x900/0x900 [ 49.175510] ? __inode_wait_for_writeback+0x2cf/0x380 [ 49.180699] destroy_inode+0xda/0x200 [ 49.184486] ? __destroy_inode+0x820/0x820 [ 49.188705] ? kasan_check_write+0x14/0x20 [ 49.192921] ? do_raw_spin_lock+0xc1/0x200 [ 49.197160] evict+0x5e0/0x980 [ 49.200337] ? jbd2_journal_stop+0x430/0x15d0 [ 49.204820] ? destroy_inode+0x200/0x200 [ 49.208867] ? do_raw_spin_lock+0xc1/0x200 [ 49.213083] ? iput+0x671/0xa90 [ 49.216348] ? lock_downgrade+0x900/0x900 [ 49.220540] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 49.226112] ? kasan_check_read+0x11/0x20 [ 49.230252] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 49.234816] ? lock_downgrade+0x900/0x900 [ 49.238947] ? ext4_ioctl+0x231b/0x4210 [ 49.242910] iput+0x679/0xa90 [ 49.246009] ? inode_add_lru+0x2a0/0x2a0 [ 49.250128] ? up_write+0x7b/0x220 [ 49.253651] ? up_read+0x110/0x110 [ 49.257175] ? up_read+0x110/0x110 [ 49.260697] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.266220] ? check_preemption_disabled+0x48/0x200 [ 49.271219] ext4_ioctl+0x236f/0x4210 [ 49.275005] ? is_bpf_text_address+0xac/0x170 [ 49.279496] ? ext4_ioctl_group_add+0x560/0x560 [ 49.284155] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 49.289937] ? kasan_check_read+0x11/0x20 [ 49.294071] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 49.299349] ? rcu_bh_qs+0xc0/0xc0 [ 49.302878] ? unwind_dump+0x190/0x190 [ 49.306754] ? is_bpf_text_address+0xd3/0x170 [ 49.311245] ? kernel_text_address+0x79/0xf0 [ 49.315647] ? __kernel_text_address+0xd/0x40 [ 49.320142] ? unwind_get_return_address+0x61/0xa0 [ 49.325072] ? __save_stack_trace+0x8d/0xf0 [ 49.329397] ? save_stack+0xa9/0xd0 [ 49.333026] ? save_stack+0x43/0xd0 [ 49.336690] ? __kasan_slab_free+0x102/0x150 [ 49.341088] ? kasan_slab_free+0xe/0x10 [ 49.345044] ? kmem_cache_free+0x83/0x290 [ 49.349174] ? putname+0xf2/0x130 [ 49.352608] ? do_sys_open+0x54d/0x700 [ 49.356537] ? __x64_sys_openat+0x9d/0x100 [ 49.360761] ? do_syscall_64+0x1b9/0x820 [ 49.364815] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.370179] ? trace_hardirqs_off+0xb8/0x310 [ 49.374570] ? kasan_check_read+0x11/0x20 [ 49.378705] ? do_raw_spin_unlock+0xa7/0x2f0 [ 49.383101] ? trace_hardirqs_on+0x310/0x310 [ 49.387492] ? kasan_check_write+0x14/0x20 [ 49.391709] ? trace_hardirqs_off+0xb8/0x310 [ 49.396103] ? trace_hardirqs_on+0x310/0x310 [ 49.400496] ? ext4_ioctl_group_add+0x560/0x560 [ 49.405146] do_vfs_ioctl+0x1de/0x1720 [ 49.409017] ? trace_hardirqs_on+0xbd/0x310 [ 49.413337] ? ioctl_preallocate+0x300/0x300 [ 49.417760] ? memset+0x31/0x40 [ 49.421023] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.426570] ? smack_file_ioctl+0x210/0x3c0 [ 49.430871] ? fget_raw+0x20/0x20 [ 49.434307] ? smack_file_lock+0x2e0/0x2e0 [ 49.438527] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.444054] ? security_file_ioctl+0x94/0xc0 [ 49.448460] ksys_ioctl+0xa9/0xd0 [ 49.451940] __x64_sys_ioctl+0x73/0xb0 [ 49.455849] do_syscall_64+0x1b9/0x820 [ 49.459735] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 49.465082] ? syscall_return_slowpath+0x5e0/0x5e0 [ 49.470101] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.474929] ? trace_hardirqs_on_caller+0x310/0x310 [ 49.480001] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 49.485006] ? prepare_exit_to_usermode+0x291/0x3b0 [ 49.490006] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.494837] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.500011] RIP: 0033:0x440009 [ 49.503194] 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 [ 49.522079] RSP: 002b:00007ffd7cede3b8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 49.529775] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 49.537040] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 49.544291] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 49.551713] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 49.559021] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 49.566278] Modules linked in: [ 49.569603] ---[ end trace e2c806d442e1c308 ]--- [ 49.574382] RIP: 0010:rb_erase+0x306/0x3710 [ 49.578721] 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 [ 49.597852] RSP: 0018:ffff8801c156e918 EFLAGS: 00010202 [ 49.603325] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 49.610610] RDX: 1ffff100382add2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 49.617897] RBP: ffff8801c156f320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 49.625158] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b8a5a1f0 [ 49.632448] R13: dffffc0000000000 R14: ffff8801c156f2f8 R15: ffff8801c156f438 [ 49.639753] FS: 00000000013f4880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 49.648001] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.653883] CR2: 0000000020000080 CR3: 00000001bba53000 CR4: 00000000001406f0 [ 49.661213] Kernel panic - not syncing: Fatal exception [ 49.667427] Kernel Offset: disabled [ 49.671047] Rebooting in 86400 seconds..