[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 32.913578] audit: type=1800 audit(1539320788.289:25): pid=5645 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 32.940498] audit: type=1800 audit(1539320788.299:26): pid=5645 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 32.968316] audit: type=1800 audit(1539320788.299:27): pid=5645 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 '10.128.0.17' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 58.721833] kasan: CONFIG_KASAN_INLINE enabled [ 58.726484] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 58.733847] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 58.740062] CPU: 1 PID: 5799 Comm: syz-executor289 Not tainted 4.19.0-rc7+ #279 [ 58.747487] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.756834] RIP: 0010:rb_erase+0x306/0x3710 [ 58.761138] 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 [ 58.780159] RSP: 0018:ffff8801d7756918 EFLAGS: 00010202 [ 58.785508] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 58.792800] RDX: 1ffff1003aeead2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 58.800055] RBP: ffff8801d7757320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 58.807309] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801b8fa11f0 [ 58.814567] R13: dffffc0000000000 R14: ffff8801d77572f8 R15: ffff8801d7757438 [ 58.821837] FS: 00000000014b6880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 58.830042] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 58.835902] CR2: 0000000020000080 CR3: 00000001bbcfb000 CR4: 00000000001406e0 [ 58.843217] Call Trace: [ 58.845803] ? rb_insert_color+0x1460/0x1460 [ 58.850205] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 58.855116] ? lock_downgrade+0x900/0x900 [ 58.859260] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 58.865038] ? mark_held_locks+0x130/0x130 [ 58.869254] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 58.874559] ? rcu_bh_qs+0xc0/0xc0 [ 58.878102] ? unwind_dump+0x190/0x190 [ 58.881980] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 58.887507] ? mark_held_locks+0x130/0x130 [ 58.891721] ? mark_page_accessed+0xcb0/0x2040 [ 58.896281] ? activate_page+0x1040/0x1040 [ 58.900501] ? activate_page+0x1040/0x1040 [ 58.904726] ? mark_held_locks+0x130/0x130 [ 58.908940] ? kasan_kmalloc+0xc7/0xe0 [ 58.912812] ? kmem_cache_alloc_trace+0x152/0x750 [ 58.917638] ? ima_add_digest_entry+0xcb/0x6a0 [ 58.922251] ? ima_add_template_entry+0x466/0x7f0 [ 58.927088] ? ima_store_template+0x224/0x310 [ 58.931588] ? mark_held_locks+0x130/0x130 [ 58.935813] ? find_get_pages_contig+0x15b0/0x15b0 [ 58.940740] ? mark_held_locks+0x130/0x130 [ 58.944959] ? lock_downgrade+0x900/0x900 [ 58.949093] ? mark_held_locks+0x130/0x130 [ 58.953315] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 58.959109] ? mark_held_locks+0x130/0x130 [ 58.963331] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 58.968675] ? lock_downgrade+0x900/0x900 [ 58.972872] ? kasan_check_read+0x11/0x20 [ 58.977008] ? do_raw_spin_unlock+0xa7/0x2f0 [ 58.981400] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 58.986020] ? mark_held_locks+0x130/0x130 [ 58.990245] ? _raw_spin_unlock+0x2c/0x50 [ 58.994383] ? ext4_discard_preallocations+0x18a/0x13c0 [ 58.999733] ? ext4_exit_mballoc+0xc0/0xc0 [ 59.003955] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 59.008961] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 59.013705] ? modules_open+0xa0/0xa0 [ 59.017492] ? __es_tree_search.isra.12+0x1ba/0x220 [ 59.022493] ? __es_remove_extent+0x9a3/0xba0 [ 59.026969] ? mark_held_locks+0x130/0x130 [ 59.031185] ? lock_downgrade+0x900/0x900 [ 59.035320] ? ext4_es_scan+0x960/0x960 [ 59.039278] ? lock_release+0x970/0x970 [ 59.043247] ? trace_hardirqs_on+0xbd/0x310 [ 59.047549] ? kasan_check_read+0x11/0x20 [ 59.051681] ? clear_inode+0x114/0x3a0 [ 59.055550] ? do_raw_write_trylock+0x1c0/0x1c0 [ 59.060319] ? kasan_check_write+0x14/0x20 [ 59.064544] ? lock_acquire+0x1ed/0x520 [ 59.068519] ? integrity_inode_free+0x77/0x320 [ 59.073088] ? ext4_es_remove_extent+0x151/0x500 [ 59.077824] ? lock_release+0x970/0x970 [ 59.081788] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 59.086875] ? depot_save_stack+0x292/0x470 [ 59.091185] ? kasan_check_write+0x14/0x20 [ 59.095404] ? do_raw_write_lock+0xbd/0x1b0 [ 59.099741] integrity_inode_free+0x12f/0x320 [ 59.104234] security_inode_free+0x19/0x90 [ 59.108456] __destroy_inode+0x328/0x820 [ 59.112503] ? generic_update_time+0x450/0x450 [ 59.117069] ? evict+0x5d8/0x980 [ 59.120424] ? lock_downgrade+0x900/0x900 [ 59.124556] ? __inode_wait_for_writeback+0x2cf/0x380 [ 59.129780] destroy_inode+0xda/0x200 [ 59.133571] ? __destroy_inode+0x820/0x820 [ 59.137800] ? kasan_check_write+0x14/0x20 [ 59.142025] ? do_raw_spin_lock+0xc1/0x200 [ 59.146245] evict+0x5e0/0x980 [ 59.149428] ? jbd2_journal_stop+0x430/0x15d0 [ 59.153914] ? destroy_inode+0x200/0x200 [ 59.158010] ? do_raw_spin_lock+0xc1/0x200 [ 59.162232] ? iput+0x671/0xa90 [ 59.165498] ? lock_downgrade+0x900/0x900 [ 59.169633] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 59.175153] ? kasan_check_read+0x11/0x20 [ 59.179285] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 59.183850] ? lock_downgrade+0x900/0x900 [ 59.187986] ? ext4_ioctl+0x231b/0x4210 [ 59.191950] iput+0x679/0xa90 [ 59.195042] ? inode_add_lru+0x2a0/0x2a0 [ 59.199086] ? up_write+0x7b/0x220 [ 59.202653] ? up_read+0x110/0x110 [ 59.206179] ? up_read+0x110/0x110 [ 59.209708] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.215230] ? check_preemption_disabled+0x48/0x200 [ 59.220232] ext4_ioctl+0x236f/0x4210 [ 59.224024] ? is_bpf_text_address+0xac/0x170 [ 59.228505] ? ext4_ioctl_group_add+0x560/0x560 [ 59.233159] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 59.238949] ? kasan_check_read+0x11/0x20 [ 59.243089] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 59.248357] ? rcu_bh_qs+0xc0/0xc0 [ 59.251882] ? unwind_dump+0x190/0x190 [ 59.255764] ? is_bpf_text_address+0xd3/0x170 [ 59.260251] ? kernel_text_address+0x79/0xf0 [ 59.264648] ? __kernel_text_address+0xd/0x40 [ 59.269132] ? unwind_get_return_address+0x61/0xa0 [ 59.274050] ? __save_stack_trace+0x8d/0xf0 [ 59.278364] ? save_stack+0xa9/0xd0 [ 59.281976] ? save_stack+0x43/0xd0 [ 59.285589] ? __kasan_slab_free+0x102/0x150 [ 59.289982] ? kasan_slab_free+0xe/0x10 [ 59.293948] ? kmem_cache_free+0x83/0x290 [ 59.298080] ? putname+0xf2/0x130 [ 59.301514] ? do_sys_open+0x54d/0x700 [ 59.305386] ? __x64_sys_openat+0x9d/0x100 [ 59.309613] ? do_syscall_64+0x1b9/0x820 [ 59.313667] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 59.319024] ? trace_hardirqs_off+0xb8/0x310 [ 59.323421] ? kasan_check_read+0x11/0x20 [ 59.327563] ? do_raw_spin_unlock+0xa7/0x2f0 [ 59.332022] ? trace_hardirqs_on+0x310/0x310 [ 59.336423] ? kasan_check_write+0x14/0x20 [ 59.340641] ? trace_hardirqs_off+0xb8/0x310 [ 59.345036] ? trace_hardirqs_on+0x310/0x310 [ 59.349432] ? ext4_ioctl_group_add+0x560/0x560 [ 59.354090] do_vfs_ioctl+0x1de/0x1720 [ 59.357958] ? trace_hardirqs_on+0xbd/0x310 [ 59.362272] ? ioctl_preallocate+0x300/0x300 [ 59.366665] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.372181] ? __fget_light+0x2e9/0x430 [ 59.376144] ? fget_raw+0x20/0x20 [ 59.379587] ? putname+0xf2/0x130 [ 59.383069] ? kmem_cache_free+0x21a/0x290 [ 59.387428] ? putname+0xf7/0x130 [ 59.390885] ? security_file_ioctl+0x94/0xc0 [ 59.395309] ksys_ioctl+0xa9/0xd0 [ 59.398749] __x64_sys_ioctl+0x73/0xb0 [ 59.402737] do_syscall_64+0x1b9/0x820 [ 59.406617] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 59.411976] ? syscall_return_slowpath+0x5e0/0x5e0 [ 59.416887] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 59.421785] ? trace_hardirqs_on_caller+0x310/0x310 [ 59.426793] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 59.431800] ? prepare_exit_to_usermode+0x291/0x3b0 [ 59.436811] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 59.441656] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 59.446829] RIP: 0033:0x440089 [ 59.450016] 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 [ 59.468905] RSP: 002b:00007ffdace91008 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 59.476601] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 59.483956] RDX: 0000000000440089 RSI: 0000000000006611 RDI: 0000000000000003 [ 59.491213] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 59.498562] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401910 [ 59.505894] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 59.513152] Modules linked in: [ 59.516610] ---[ end trace a3ed3ce313ac3bd2 ]--- [ 59.521370] RIP: 0010:rb_erase+0x306/0x3710 [ 59.525686] 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 [ 59.544627] RSP: 0018:ffff8801d7756918 EFLAGS: 00010202 [ 59.549999] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 59.557281] RDX: 1ffff1003aeead2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 59.564534] RBP: ffff8801d7757320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 59.571815] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801b8fa11f0 [ 59.579084] R13: dffffc0000000000 R14: ffff8801d77572f8 R15: ffff8801d7757438 [ 59.586383] FS: 00000000014b6880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 59.594601] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.600793] CR2: 0000000020000080 CR3: 00000001bbcfb000 CR4: 00000000001406e0 [ 59.608079] Kernel panic - not syncing: Fatal exception [ 59.614333] Kernel Offset: disabled [ 59.617956] Rebooting in 86400 seconds..