[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 37.019761] audit: type=1800 audit(1539189996.816:25): pid=5665 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 37.039036] audit: type=1800 audit(1539189996.816:26): pid=5665 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 37.066951] audit: type=1800 audit(1539189996.816:27): pid=5665 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] 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 '10.128.10.13' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 48.769848] kasan: CONFIG_KASAN_INLINE enabled [ 48.774475] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 48.781894] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 48.788327] CPU: 1 PID: 5817 Comm: syz-executor370 Not tainted 4.19.0-rc6+ #253 [ 48.795772] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.805138] RIP: 0010:rb_erase+0x306/0x3710 [ 48.809627] 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 [ 48.828761] RSP: 0018:ffff8801ccf46918 EFLAGS: 00010202 [ 48.834127] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 48.841397] RDX: 1ffff100399e8d2b RSI: ffffffff8afc38a0 RDI: 0000000000000008 [ 48.848669] RBP: ffff8801ccf47320 R08: dffffc0000000000 R09: fffffbfff12d6a70 [ 48.855968] R10: fffffbfff12d6a70 R11: ffffffff896b5383 R12: ffff8801b8f301f0 [ 48.863250] R13: dffffc0000000000 R14: ffff8801ccf472f8 R15: ffff8801ccf47438 [ 48.870663] FS: 0000000001158880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 48.878972] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.884852] CR2: 0000000020000080 CR3: 00000001bd380000 CR4: 00000000001406e0 [ 48.892120] Call Trace: [ 48.894712] ? rb_insert_color+0x1460/0x1460 [ 48.899123] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 48.904054] ? lock_downgrade+0x900/0x900 [ 48.908202] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 48.913996] ? mark_held_locks+0x130/0x130 [ 48.918233] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 48.923516] ? rcu_bh_qs+0xc0/0xc0 [ 48.927054] ? unwind_dump+0x190/0x190 [ 48.930966] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 48.936598] ? mark_held_locks+0x130/0x130 [ 48.940829] ? mark_page_accessed+0xcb0/0x2040 [ 48.945481] ? activate_page+0x1040/0x1040 [ 48.949769] ? activate_page+0x1040/0x1040 [ 48.954012] ? mark_held_locks+0x130/0x130 [ 48.958248] ? kasan_kmalloc+0xc7/0xe0 [ 48.962134] ? kmem_cache_alloc_trace+0x152/0x750 [ 48.966993] ? ima_add_digest_entry+0xcb/0x6a0 [ 48.971575] ? ima_add_template_entry+0x466/0x7f0 [ 48.976413] ? ima_store_template+0x224/0x310 [ 48.980906] ? pagecache_get_page+0x2d8/0xf00 [ 48.985552] ? find_get_pages_contig+0x15b0/0x15b0 [ 48.990487] ? is_bpf_text_address+0xac/0x170 [ 48.994987] ? lock_downgrade+0x900/0x900 [ 48.999133] ? mark_held_locks+0x130/0x130 [ 49.003371] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 49.009171] ? mark_held_locks+0x130/0x130 [ 49.013474] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 49.018841] ? lock_downgrade+0x900/0x900 [ 49.023002] ? kasan_check_read+0x11/0x20 [ 49.027205] ? do_raw_spin_unlock+0xa7/0x2f0 [ 49.031734] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 49.036325] ? mark_held_locks+0x130/0x130 [ 49.040558] ? _raw_spin_unlock+0x2c/0x50 [ 49.044705] ? ext4_discard_preallocations+0x18a/0x13c0 [ 49.050073] ? trace_hardirqs_on+0xbd/0x310 [ 49.054456] ? ext4_exit_mballoc+0xc0/0xc0 [ 49.058692] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 49.063713] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 49.068473] ? modules_open+0xa0/0xa0 [ 49.072273] ? __es_tree_search.isra.12+0x1ba/0x220 [ 49.077296] ? __es_remove_extent+0x9a3/0xba0 [ 49.081793] ? mark_held_locks+0x130/0x130 [ 49.086162] ? lock_downgrade+0x900/0x900 [ 49.090312] ? ext4_es_scan+0x960/0x960 [ 49.094286] ? lock_release+0x970/0x970 [ 49.098261] ? trace_hardirqs_on+0xbd/0x310 [ 49.102641] ? kasan_check_read+0x11/0x20 [ 49.106846] ? clear_inode+0x114/0x3a0 [ 49.110916] ? do_raw_write_trylock+0x1c0/0x1c0 [ 49.115612] ? kasan_check_write+0x14/0x20 [ 49.119848] ? lock_acquire+0x1ed/0x520 [ 49.123820] ? integrity_inode_free+0x77/0x320 [ 49.128407] ? ext4_es_remove_extent+0x151/0x500 [ 49.133225] ? lock_release+0x970/0x970 [ 49.137202] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 49.142303] ? depot_save_stack+0x292/0x470 [ 49.146626] ? kasan_check_write+0x14/0x20 [ 49.150859] ? do_raw_write_lock+0xbd/0x1b0 [ 49.155184] integrity_inode_free+0x12f/0x320 [ 49.159684] security_inode_free+0x19/0x90 [ 49.163922] __destroy_inode+0x328/0x820 [ 49.168012] ? generic_update_time+0x450/0x450 [ 49.172592] ? evict+0x5d8/0x980 [ 49.175995] ? lock_downgrade+0x900/0x900 [ 49.180153] ? __inode_wait_for_writeback+0x2cf/0x380 [ 49.185493] destroy_inode+0xda/0x200 [ 49.189805] ? __destroy_inode+0x820/0x820 [ 49.194323] ? kasan_check_write+0x14/0x20 [ 49.199067] ? do_raw_spin_lock+0xc1/0x200 [ 49.203808] evict+0x5e0/0x980 [ 49.207340] ? jbd2_journal_stop+0x430/0x15d0 [ 49.212088] ? destroy_inode+0x200/0x200 [ 49.216440] ? do_raw_spin_lock+0xc1/0x200 [ 49.220821] ? iput+0x671/0xa90 [ 49.224213] ? lock_downgrade+0x900/0x900 [ 49.228363] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 49.233900] ? kasan_check_read+0x11/0x20 [ 49.238046] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 49.242626] ? lock_downgrade+0x900/0x900 [ 49.246787] ? ext4_ioctl+0x231b/0x4210 [ 49.250761] iput+0x679/0xa90 [ 49.253866] ? inode_add_lru+0x2a0/0x2a0 [ 49.257924] ? up_write+0x7b/0x220 [ 49.261483] ? up_read+0x110/0x110 [ 49.265019] ? up_read+0x110/0x110 [ 49.268558] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.274094] ? check_preemption_disabled+0x48/0x200 [ 49.279114] ext4_ioctl+0x236f/0x4210 [ 49.282914] ? is_bpf_text_address+0xac/0x170 [ 49.287433] ? ext4_ioctl_group_add+0x560/0x560 [ 49.292104] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 49.297897] ? kasan_check_read+0x11/0x20 [ 49.302046] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 49.307325] ? rcu_bh_qs+0xc0/0xc0 [ 49.310863] ? unwind_dump+0x190/0x190 [ 49.314753] ? is_bpf_text_address+0xd3/0x170 [ 49.319250] ? kernel_text_address+0x79/0xf0 [ 49.323660] ? __kernel_text_address+0xd/0x40 [ 49.328155] ? unwind_get_return_address+0x61/0xa0 [ 49.333082] ? __save_stack_trace+0x8d/0xf0 [ 49.337402] ? save_stack+0xa9/0xd0 [ 49.341025] ? save_stack+0x43/0xd0 [ 49.344645] ? __kasan_slab_free+0x102/0x150 [ 49.349048] ? kasan_slab_free+0xe/0x10 [ 49.353069] ? kmem_cache_free+0x83/0x290 [ 49.357216] ? putname+0xf2/0x130 [ 49.360724] ? do_sys_open+0x54d/0x700 [ 49.364612] ? __x64_sys_openat+0x9d/0x100 [ 49.368846] ? do_syscall_64+0x1b9/0x820 [ 49.372905] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.378267] ? trace_hardirqs_off+0xb8/0x310 [ 49.382668] ? kasan_check_read+0x11/0x20 [ 49.386812] ? do_raw_spin_unlock+0xa7/0x2f0 [ 49.391287] ? trace_hardirqs_on+0x310/0x310 [ 49.395693] ? kasan_check_write+0x14/0x20 [ 49.399928] ? trace_hardirqs_off+0xb8/0x310 [ 49.404357] ? trace_hardirqs_on+0x310/0x310 [ 49.408767] ? ext4_ioctl_group_add+0x560/0x560 [ 49.413434] do_vfs_ioctl+0x1de/0x1720 [ 49.417320] ? trace_hardirqs_on+0xbd/0x310 [ 49.421637] ? ioctl_preallocate+0x300/0x300 [ 49.426046] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.431579] ? __fget_light+0x2e9/0x430 [ 49.435547] ? fget_raw+0x20/0x20 [ 49.438996] ? putname+0xf2/0x130 [ 49.442450] ? kmem_cache_free+0x21a/0x290 [ 49.446758] ? putname+0xf7/0x130 [ 49.450214] ? security_file_ioctl+0x94/0xc0 [ 49.454620] ksys_ioctl+0xa9/0xd0 [ 49.458071] __x64_sys_ioctl+0x73/0xb0 [ 49.461977] do_syscall_64+0x1b9/0x820 [ 49.465860] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 49.471229] ? syscall_return_slowpath+0x5e0/0x5e0 [ 49.476156] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.481001] ? trace_hardirqs_on_caller+0x310/0x310 [ 49.486029] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 49.491047] ? prepare_exit_to_usermode+0x291/0x3b0 [ 49.496063] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.500906] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.506104] RIP: 0033:0x440009 [ 49.509305] 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 [ 49.528260] RSP: 002b:00007ffd3df20968 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 49.535994] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 49.543270] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 49.550605] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 49.557881] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 49.565153] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 49.572428] Modules linked in: [ 49.575993] ---[ end trace f3ce150266e464ab ]--- [ 49.580793] RIP: 0010:rb_erase+0x306/0x3710 [ 49.585205] 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 [ 49.604296] RSP: 0018:ffff8801ccf46918 EFLAGS: 00010202 [ 49.609709] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 49.617126] RDX: 1ffff100399e8d2b RSI: ffffffff8afc38a0 RDI: 0000000000000008 [ 49.624619] RBP: ffff8801ccf47320 R08: dffffc0000000000 R09: fffffbfff12d6a70 [ 49.631975] R10: fffffbfff12d6a70 R11: ffffffff896b5383 R12: ffff8801b8f301f0 [ 49.639464] R13: dffffc0000000000 R14: ffff8801ccf472f8 R15: ffff8801ccf47438 [ 49.646792] FS: 0000000001158880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 49.655124] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.661051] CR2: 0000000020000080 CR3: 00000001bd380000 CR4: 00000000001406e0 [ 49.668363] Kernel panic - not syncing: Fatal exception [ 49.675052] Kernel Offset: disabled [ 49.678704] Rebooting in 86400 seconds..