[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 35.431013] audit: type=1800 audit(1539251648.970:25): pid=5649 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 35.456711] audit: type=1800 audit(1539251648.970:26): pid=5649 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 35.496019] audit: type=1800 audit(1539251648.970:27): pid=5649 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 '10.128.0.15' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 47.269025] kasan: CONFIG_KASAN_INLINE enabled [ 47.273664] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 47.281084] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 47.287422] CPU: 1 PID: 5803 Comm: syz-executor560 Not tainted 4.19.0-rc6+ #136 [ 47.294987] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.304336] RIP: 0010:rb_erase+0x306/0x3710 [ 47.308645] 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 [ 47.327728] RSP: 0018:ffff8801bc44e918 EFLAGS: 00010202 [ 47.333105] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 47.340363] RDX: 1ffff10037889d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 47.347716] RBP: ffff8801bc44f320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 47.354966] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b93431f0 [ 47.362271] R13: dffffc0000000000 R14: ffff8801bc44f2f8 R15: ffff8801bc44f438 [ 47.369530] FS: 0000000001a75880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 47.377738] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.383735] CR2: 0000000020000080 CR3: 00000001bbe73000 CR4: 00000000001406e0 [ 47.390994] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 47.398256] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 47.405508] Call Trace: [ 47.408260] ? rb_insert_color+0x1460/0x1460 [ 47.412669] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 47.417580] ? lock_downgrade+0x900/0x900 [ 47.421712] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 47.427489] ? mark_held_locks+0x130/0x130 [ 47.431715] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 47.436970] ? rcu_bh_qs+0xc0/0xc0 [ 47.440487] ? unwind_dump+0x190/0x190 [ 47.444357] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 47.449887] ? mark_held_locks+0x130/0x130 [ 47.454108] ? mark_page_accessed+0xcb0/0x2040 [ 47.458669] ? activate_page+0x1040/0x1040 [ 47.462889] ? activate_page+0x1040/0x1040 [ 47.467105] ? mark_held_locks+0x130/0x130 [ 47.471317] ? kasan_kmalloc+0xc7/0xe0 [ 47.475183] ? kmem_cache_alloc_trace+0x152/0x750 [ 47.480007] ? ima_add_digest_entry+0xcb/0x6a0 [ 47.484567] ? ima_add_template_entry+0x466/0x7f0 [ 47.489387] ? ima_store_template+0x224/0x310 [ 47.493866] ? pagecache_get_page+0x2d8/0xf00 [ 47.498345] ? find_get_pages_contig+0x15b0/0x15b0 [ 47.503257] ? is_bpf_text_address+0xac/0x170 [ 47.507733] ? lock_downgrade+0x900/0x900 [ 47.511858] ? mark_held_locks+0x130/0x130 [ 47.516090] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 47.521873] ? mark_held_locks+0x130/0x130 [ 47.526095] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 47.531437] ? lock_downgrade+0x900/0x900 [ 47.535566] ? kasan_check_read+0x11/0x20 [ 47.539691] ? do_raw_spin_unlock+0xa7/0x2f0 [ 47.544079] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 47.548643] ? mark_held_locks+0x130/0x130 [ 47.552976] ? _raw_spin_unlock+0x2c/0x50 [ 47.557114] ? ext4_discard_preallocations+0x18a/0x13c0 [ 47.562458] ? trace_hardirqs_on+0xbd/0x310 [ 47.566760] ? ext4_exit_mballoc+0xc0/0xc0 [ 47.570973] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 47.575969] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 47.580705] ? modules_open+0xa0/0xa0 [ 47.584485] ? __es_tree_search.isra.12+0x1ba/0x220 [ 47.589481] ? __es_remove_extent+0x9a3/0xba0 [ 47.593956] ? mark_held_locks+0x130/0x130 [ 47.598170] ? lock_downgrade+0x900/0x900 [ 47.602298] ? ext4_es_scan+0x960/0x960 [ 47.606254] ? lock_release+0x970/0x970 [ 47.610205] ? trace_hardirqs_on+0xbd/0x310 [ 47.614507] ? kasan_check_read+0x11/0x20 [ 47.618642] ? clear_inode+0x114/0x3a0 [ 47.622520] ? do_raw_write_trylock+0x1c0/0x1c0 [ 47.627291] ? kasan_check_write+0x14/0x20 [ 47.631515] ? lock_acquire+0x1ed/0x520 [ 47.635471] ? integrity_inode_free+0x77/0x320 [ 47.640085] ? ext4_es_remove_extent+0x151/0x500 [ 47.644829] ? lock_release+0x970/0x970 [ 47.648781] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 47.653861] ? depot_save_stack+0x292/0x470 [ 47.658163] ? kasan_check_write+0x14/0x20 [ 47.662377] ? do_raw_write_lock+0xbd/0x1b0 [ 47.666696] integrity_inode_free+0x12f/0x320 [ 47.671173] security_inode_free+0x19/0x90 [ 47.675387] __destroy_inode+0x328/0x820 [ 47.679425] ? generic_update_time+0x450/0x450 [ 47.683986] ? evict+0x5d8/0x980 [ 47.687333] ? lock_downgrade+0x900/0x900 [ 47.691461] ? __inode_wait_for_writeback+0x2cf/0x380 [ 47.696635] destroy_inode+0xda/0x200 [ 47.700416] ? __destroy_inode+0x820/0x820 [ 47.704629] ? kasan_check_write+0x14/0x20 [ 47.708858] ? do_raw_spin_lock+0xc1/0x200 [ 47.713087] evict+0x5e0/0x980 [ 47.716272] ? jbd2_journal_stop+0x430/0x15d0 [ 47.720743] ? destroy_inode+0x200/0x200 [ 47.724782] ? do_raw_spin_lock+0xc1/0x200 [ 47.728994] ? iput+0x671/0xa90 [ 47.732249] ? lock_downgrade+0x900/0x900 [ 47.736379] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 47.741892] ? kasan_check_read+0x11/0x20 [ 47.746020] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 47.750747] ? lock_downgrade+0x900/0x900 [ 47.754878] ? ext4_ioctl+0x231b/0x4210 [ 47.758845] iput+0x679/0xa90 [ 47.761972] ? inode_add_lru+0x2a0/0x2a0 [ 47.766021] ? up_write+0x7b/0x220 [ 47.769545] ? up_read+0x110/0x110 [ 47.773064] ? up_read+0x110/0x110 [ 47.776587] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.782121] ? check_preemption_disabled+0x48/0x200 [ 47.787122] ext4_ioctl+0x236f/0x4210 [ 47.790907] ? is_bpf_text_address+0xac/0x170 [ 47.795395] ? ext4_ioctl_group_add+0x560/0x560 [ 47.800051] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 47.805829] ? kasan_check_read+0x11/0x20 [ 47.809974] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 47.815229] ? rcu_bh_qs+0xc0/0xc0 [ 47.818753] ? unwind_dump+0x190/0x190 [ 47.822640] ? is_bpf_text_address+0xd3/0x170 [ 47.827122] ? kernel_text_address+0x79/0xf0 [ 47.831512] ? __kernel_text_address+0xd/0x40 [ 47.835990] ? unwind_get_return_address+0x61/0xa0 [ 47.840898] ? __save_stack_trace+0x8d/0xf0 [ 47.845203] ? save_stack+0xa9/0xd0 [ 47.848805] ? save_stack+0x43/0xd0 [ 47.852409] ? __kasan_slab_free+0x102/0x150 [ 47.856794] ? kasan_slab_free+0xe/0x10 [ 47.860753] ? kmem_cache_free+0x83/0x290 [ 47.864960] ? putname+0xf2/0x130 [ 47.868403] ? do_sys_open+0x54d/0x700 [ 47.872272] ? __x64_sys_openat+0x9d/0x100 [ 47.876485] ? do_syscall_64+0x1b9/0x820 [ 47.880547] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.885893] ? trace_hardirqs_off+0xb8/0x310 [ 47.890277] ? kasan_check_read+0x11/0x20 [ 47.894535] ? do_raw_spin_unlock+0xa7/0x2f0 [ 47.898999] ? trace_hardirqs_on+0x310/0x310 [ 47.903397] ? kasan_check_write+0x14/0x20 [ 47.907678] ? trace_hardirqs_off+0xb8/0x310 [ 47.912075] ? trace_hardirqs_on+0x310/0x310 [ 47.916466] ? ext4_ioctl_group_add+0x560/0x560 [ 47.921117] do_vfs_ioctl+0x1de/0x1720 [ 47.924983] ? trace_hardirqs_on+0xbd/0x310 [ 47.929299] ? ioctl_preallocate+0x300/0x300 [ 47.933685] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.939200] ? __fget_light+0x2e9/0x430 [ 47.943153] ? fget_raw+0x20/0x20 [ 47.946586] ? putname+0xf2/0x130 [ 47.950018] ? kmem_cache_free+0x21a/0x290 [ 47.954227] ? putname+0xf7/0x130 [ 47.957661] ? security_file_ioctl+0x94/0xc0 [ 47.962057] ksys_ioctl+0xa9/0xd0 [ 47.965493] __x64_sys_ioctl+0x73/0xb0 [ 47.969366] do_syscall_64+0x1b9/0x820 [ 47.973234] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 47.978576] ? syscall_return_slowpath+0x5e0/0x5e0 [ 47.983484] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.988305] ? trace_hardirqs_on_caller+0x310/0x310 [ 47.993443] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 47.998509] ? prepare_exit_to_usermode+0x291/0x3b0 [ 48.003514] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.008342] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.013511] RIP: 0033:0x440089 [ 48.016754] 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 [ 48.035644] RSP: 002b:00007ffc049c4cd8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 48.043339] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 48.050587] RDX: 0000000000440089 RSI: 0000000000006611 RDI: 0000000000000003 [ 48.057832] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 48.065078] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401910 [ 48.072326] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 48.079575] Modules linked in: [ 48.082867] ---[ end trace 3845fee1f165d442 ]--- [ 48.087717] RIP: 0010:rb_erase+0x306/0x3710 [ 48.092034] 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 [ 48.110955] RSP: 0018:ffff8801bc44e918 EFLAGS: 00010202 [ 48.116331] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 48.123578] RDX: 1ffff10037889d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 48.130855] RBP: ffff8801bc44f320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 48.138128] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b93431f0 [ 48.145377] R13: dffffc0000000000 R14: ffff8801bc44f2f8 R15: ffff8801bc44f438 [ 48.152670] FS: 0000000001a75880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 48.160896] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.166788] CR2: 0000000020000080 CR3: 00000001bbe73000 CR4: 00000000001406e0 [ 48.174041] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.181347] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.188613] Kernel panic - not syncing: Fatal exception [ 48.194794] Kernel Offset: disabled [ 48.198414] Rebooting in 86400 seconds..