[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 35.021942] audit: type=1800 audit(1538617195.663:25): pid=5882 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 35.046789] audit: type=1800 audit(1538617195.673:26): pid=5882 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 35.072055] audit: type=1800 audit(1538617195.673:27): pid=5882 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 '10.128.10.43' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 58.766744] kasan: CONFIG_KASAN_INLINE enabled [ 58.771401] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 58.778823] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 58.785074] CPU: 0 PID: 6035 Comm: syz-executor201 Not tainted 4.19.0-rc6-next-20181003+ #86 [ 58.793643] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.803006] RIP: 0010:rb_erase+0x306/0x3710 [ 58.807339] 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 [ 58.826528] RSP: 0018:ffff8801bbe96918 EFLAGS: 00010202 [ 58.831956] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 58.839237] RDX: 1ffff100377d2d2b RSI: ffffffff8afa8b00 RDI: 0000000000000008 [ 58.846496] RBP: ffff8801bbe97320 R08: dffffc0000000000 R09: fffffbfff12d702c [ 58.853750] R10: fffffbfff12d702c R11: ffffffff896b8163 R12: ffff8801b8f8d1f0 [ 58.861001] R13: dffffc0000000000 R14: ffff8801bbe972f8 R15: ffff8801bbe97438 [ 58.868256] FS: 00000000020b1880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 58.877020] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 58.882896] CR2: 0000000020000080 CR3: 00000001d5b62000 CR4: 00000000001406f0 [ 58.890156] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 58.897590] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 58.904852] Call Trace: [ 58.907479] ? rb_insert_color+0x1460/0x1460 [ 58.911956] ? is_bpf_text_address+0xac/0x170 [ 58.916451] ? lock_downgrade+0x900/0x900 [ 58.920587] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 58.925506] ? mark_held_locks+0x130/0x130 [ 58.929734] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 58.935121] ? rcu_softirq_qs+0x20/0x20 [ 58.939149] ? unwind_dump+0x190/0x190 [ 58.943032] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 58.948605] ? mark_page_accessed+0xcaf/0x2040 [ 58.953288] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 58.958827] ? activate_page+0x1040/0x1040 [ 58.963064] ? mark_held_locks+0x130/0x130 [ 58.967396] ? unwind_get_return_address+0x61/0xa0 [ 58.972318] ? __save_stack_trace+0x8d/0xf0 [ 58.976630] ? pagecache_get_page+0x2d8/0xf00 [ 58.981163] ? process_measurement+0x15c4/0x1bf0 [ 58.985913] ? ima_file_check+0xe5/0x130 [ 58.989965] ? find_get_pages_contig+0x18d0/0x18d0 [ 58.994889] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 58.999948] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 59.004696] ? is_bpf_text_address+0xac/0x170 [ 59.009289] ? lock_downgrade+0x900/0x900 [ 59.013421] ? mark_held_locks+0x130/0x130 [ 59.017645] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 59.022564] ? mark_held_locks+0x130/0x130 [ 59.026923] ? ext4_discard_preallocations+0x9b4/0x13b0 [ 59.032295] ? lock_downgrade+0x900/0x900 [ 59.036430] ? kasan_check_read+0x11/0x20 [ 59.040566] ? do_raw_spin_unlock+0xa7/0x2f0 [ 59.044961] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 59.049541] ? mark_held_locks+0x130/0x130 [ 59.053865] ? _raw_spin_unlock+0x2c/0x50 [ 59.058099] ? ext4_discard_preallocations+0x18a/0x13b0 [ 59.064336] ? __getblk_gfp+0x102/0x1030 [ 59.068384] ? ext4_exit_mballoc+0xc0/0xc0 [ 59.072614] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 59.077622] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 59.082368] ? modules_open+0xa0/0xa0 [ 59.086282] ? __es_tree_search.isra.12+0x1ba/0x220 [ 59.091402] ? __es_remove_extent+0x9a3/0xba0 [ 59.095902] ? mark_held_locks+0x130/0x130 [ 59.100178] ? lock_downgrade+0x900/0x900 [ 59.104324] ? ext4_es_scan+0x950/0x950 [ 59.108297] ? lock_release+0x970/0x970 [ 59.112264] ? trace_hardirqs_on+0xbd/0x310 [ 59.116577] ? kasan_check_read+0x11/0x20 [ 59.120706] ? clear_inode+0x114/0x3a0 [ 59.124577] ? do_raw_write_trylock+0x1c0/0x1c0 [ 59.129227] ? kasan_check_write+0x14/0x20 [ 59.133458] ? lock_acquire+0x1ed/0x520 [ 59.137424] ? integrity_inode_free+0x77/0x320 [ 59.142099] ? ext4_es_remove_extent+0x14c/0x4f0 [ 59.146844] ? lock_release+0x970/0x970 [ 59.150909] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 59.156107] ? depot_save_stack+0x292/0x470 [ 59.160508] ? kasan_check_write+0x14/0x20 [ 59.164784] ? do_raw_write_lock+0xbd/0x1b0 [ 59.169099] integrity_inode_free+0x12f/0x320 [ 59.173582] security_inode_free+0x19/0x90 [ 59.177986] __destroy_inode+0x328/0x820 [ 59.182036] ? generic_update_time+0x450/0x450 [ 59.186705] ? evict+0x5d8/0x980 [ 59.190066] ? lock_downgrade+0x900/0x900 [ 59.194222] ? __inode_wait_for_writeback+0x2cf/0x380 [ 59.199487] destroy_inode+0xda/0x200 [ 59.203286] ? __destroy_inode+0x820/0x820 [ 59.207696] ? kasan_check_write+0x14/0x20 [ 59.211922] ? do_raw_spin_lock+0xc1/0x200 [ 59.216146] evict+0x5e0/0x980 [ 59.219333] ? jbd2_journal_stop+0x430/0x15c0 [ 59.223934] ? destroy_inode+0x200/0x200 [ 59.227979] ? do_raw_spin_lock+0xc1/0x200 [ 59.232265] ? iput+0x66c/0xa90 [ 59.235615] ? lock_downgrade+0x900/0x900 [ 59.239767] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 59.245296] ? kasan_check_read+0x11/0x20 [ 59.249530] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 59.254098] ? lock_downgrade+0x900/0x900 [ 59.258316] ? ext4_ioctl+0x2316/0x4210 [ 59.262288] iput+0x674/0xa90 [ 59.265463] ? inode_add_lru+0x2a0/0x2a0 [ 59.269519] ? up_write+0x7b/0x220 [ 59.273047] ? down_write_nested+0x130/0x130 [ 59.277505] ? down_write_nested+0x130/0x130 [ 59.281995] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.287520] ? check_preemption_disabled+0x48/0x200 [ 59.292531] ext4_ioctl+0x236a/0x4210 [ 59.296367] ? is_bpf_text_address+0xac/0x170 [ 59.300855] ? ext4_ioctl_group_add+0x560/0x560 [ 59.305512] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 59.310429] ? kasan_check_read+0x11/0x20 [ 59.314567] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 59.319930] ? rcu_softirq_qs+0x20/0x20 [ 59.323889] ? unwind_dump+0x190/0x190 [ 59.327766] ? is_bpf_text_address+0xd3/0x170 [ 59.332593] ? kernel_text_address+0x79/0xf0 [ 59.336993] ? __kernel_text_address+0xd/0x40 [ 59.341479] ? unwind_get_return_address+0x61/0xa0 [ 59.346444] ? __save_stack_trace+0x8d/0xf0 [ 59.350768] ? save_stack+0xa9/0xd0 [ 59.354385] ? save_stack+0x43/0xd0 [ 59.358145] ? __kasan_slab_free+0x102/0x150 [ 59.362544] ? kasan_slab_free+0xe/0x10 [ 59.366509] ? kmem_cache_free+0x83/0x290 [ 59.370652] ? putname+0xf2/0x130 [ 59.374160] ? do_sys_open+0x54d/0x700 [ 59.378103] ? __x64_sys_openat+0x9d/0x100 [ 59.382602] ? do_syscall_64+0x1b9/0x820 [ 59.386750] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 59.392264] ? trace_hardirqs_off+0xb8/0x310 [ 59.396683] ? kasan_check_read+0x11/0x20 [ 59.400883] ? do_raw_spin_unlock+0xa7/0x2f0 [ 59.405316] ? trace_hardirqs_on+0x310/0x310 [ 59.409722] ? kasan_check_write+0x14/0x20 [ 59.414012] ? trace_hardirqs_off+0xb8/0x310 [ 59.418420] ? trace_hardirqs_on+0x310/0x310 [ 59.422819] ? ext4_ioctl_group_add+0x560/0x560 [ 59.427492] do_vfs_ioctl+0x1de/0x1720 [ 59.431377] ? trace_hardirqs_on+0xbd/0x310 [ 59.435747] ? ioctl_preallocate+0x300/0x300 [ 59.440161] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.445691] ? __fget_light+0x2e9/0x430 [ 59.449656] ? fget_raw+0x20/0x20 [ 59.453101] ? putname+0xf2/0x130 [ 59.456550] ? kmem_cache_free+0x21a/0x290 [ 59.460852] ? putname+0xf7/0x130 [ 59.464312] ? security_file_ioctl+0x94/0xc0 [ 59.468704] ksys_ioctl+0xa9/0xd0 [ 59.472141] __x64_sys_ioctl+0x73/0xb0 [ 59.476023] do_syscall_64+0x1b9/0x820 [ 59.479902] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 59.485257] ? syscall_return_slowpath+0x5e0/0x5e0 [ 59.490220] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 59.495102] ? trace_hardirqs_on_caller+0x310/0x310 [ 59.500101] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 59.505101] ? prepare_exit_to_usermode+0x291/0x3b0 [ 59.510108] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 59.515008] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 59.520187] RIP: 0033:0x440009 [ 59.523395] 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 [ 59.542288] RSP: 002b:00007ffdab1d0f38 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 59.549982] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 59.557337] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 59.564594] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 59.571843] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 59.579097] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 59.586358] Modules linked in: [ 59.589767] ---[ end trace 7481cd9abaac7def ]--- [ 59.594564] RIP: 0010:rb_erase+0x306/0x3710 [ 59.598879] 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 [ 59.617838] RSP: 0018:ffff8801bbe96918 EFLAGS: 00010202 [ 59.623235] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 59.630579] RDX: 1ffff100377d2d2b RSI: ffffffff8afa8b00 RDI: 0000000000000008 [ 59.637869] RBP: ffff8801bbe97320 R08: dffffc0000000000 R09: fffffbfff12d702c [ 59.645169] R10: fffffbfff12d702c R11: ffffffff896b8163 R12: ffff8801b8f8d1f0 [ 59.652476] R13: dffffc0000000000 R14: ffff8801bbe972f8 R15: ffff8801bbe97438 [ 59.659883] FS: 00000000020b1880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 59.668146] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.674046] CR2: 0000000020000080 CR3: 00000001d5b62000 CR4: 00000000001406f0 [ 59.681307] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 59.688615] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 59.695904] Kernel panic - not syncing: Fatal exception [ 59.702325] Kernel Offset: disabled [ 59.705974] Rebooting in 86400 seconds..