[ 36.238715] audit: type=1800 audit(1539276295.823:24): pid=5690 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. [ 36.880681] audit: type=1800 audit(1539276296.523:25): pid=5690 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 36.906427] audit: type=1800 audit(1539276296.533:26): pid=5690 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 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 '10.128.0.85' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 59.096623] kasan: CONFIG_KASAN_INLINE enabled [ 59.101228] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 59.108634] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 59.114865] CPU: 1 PID: 5844 Comm: syz-executor365 Not tainted 4.19.0-rc7+ #55 [ 59.122206] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.131615] RIP: 0010:rb_erase+0x306/0x3710 [ 59.135928] 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 [ 59.154913] RSP: 0018:ffff8801ce93e918 EFLAGS: 00010202 [ 59.160258] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 59.167512] RDX: 1ffff10039d27d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 59.174765] RBP: ffff8801ce93f320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 59.182017] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b8a838b0 [ 59.189283] R13: dffffc0000000000 R14: ffff8801ce93f2f8 R15: ffff8801ce93f438 [ 59.196542] FS: 0000000001520880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 59.204917] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.210781] CR2: 0000000020000080 CR3: 00000001bbb62000 CR4: 00000000001406e0 [ 59.218075] Call Trace: [ 59.220657] ? rb_insert_color+0x1460/0x1460 [ 59.225055] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 59.229985] ? lock_downgrade+0x900/0x900 [ 59.234123] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 59.239907] ? mark_held_locks+0x130/0x130 [ 59.244128] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 59.249389] ? rcu_bh_qs+0xc0/0xc0 [ 59.252914] ? unwind_dump+0x190/0x190 [ 59.256814] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 59.262354] ? mark_held_locks+0x130/0x130 [ 59.266588] ? mark_page_accessed+0xcb0/0x2040 [ 59.271153] ? activate_page+0x1040/0x1040 [ 59.275385] ? activate_page+0x1040/0x1040 [ 59.279609] ? mark_held_locks+0x130/0x130 [ 59.283837] ? kasan_kmalloc+0xc7/0xe0 [ 59.287707] ? kmem_cache_alloc_trace+0x152/0x750 [ 59.292539] ? ima_add_digest_entry+0xcb/0x6a0 [ 59.297208] ? ima_add_template_entry+0x466/0x7f0 [ 59.302039] ? ima_store_template+0x224/0x310 [ 59.306520] ? pagecache_get_page+0x2d8/0xf00 [ 59.311004] ? find_get_pages_contig+0x15b0/0x15b0 [ 59.315923] ? is_bpf_text_address+0xac/0x170 [ 59.320409] ? lock_downgrade+0x900/0x900 [ 59.324547] ? mark_held_locks+0x130/0x130 [ 59.328777] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 59.334566] ? mark_held_locks+0x130/0x130 [ 59.338799] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 59.344153] ? lock_downgrade+0x900/0x900 [ 59.348296] ? kasan_check_read+0x11/0x20 [ 59.352590] ? do_raw_spin_unlock+0xa7/0x2f0 [ 59.356990] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 59.361556] ? mark_held_locks+0x130/0x130 [ 59.365774] ? _raw_spin_unlock+0x2c/0x50 [ 59.369901] ? ext4_discard_preallocations+0x18a/0x13c0 [ 59.375251] ? trace_hardirqs_on+0xbd/0x310 [ 59.379561] ? ext4_exit_mballoc+0xc0/0xc0 [ 59.383799] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 59.388842] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 59.393594] ? modules_open+0xa0/0xa0 [ 59.397383] ? __es_tree_search.isra.12+0x1ba/0x220 [ 59.402430] ? __es_remove_extent+0x9a3/0xba0 [ 59.406928] ? mark_held_locks+0x130/0x130 [ 59.411148] ? lock_downgrade+0x900/0x900 [ 59.415283] ? ext4_es_scan+0x960/0x960 [ 59.419252] ? lock_release+0x970/0x970 [ 59.423286] ? trace_hardirqs_on+0xbd/0x310 [ 59.427619] ? kasan_check_read+0x11/0x20 [ 59.431747] ? clear_inode+0x114/0x3a0 [ 59.435620] ? do_raw_write_trylock+0x1c0/0x1c0 [ 59.440271] ? kasan_check_write+0x14/0x20 [ 59.444501] ? lock_acquire+0x1ed/0x520 [ 59.448476] ? integrity_inode_free+0x77/0x320 [ 59.453047] ? ext4_es_remove_extent+0x151/0x500 [ 59.457792] ? lock_release+0x970/0x970 [ 59.461758] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 59.466847] ? depot_save_stack+0x292/0x470 [ 59.471151] ? kasan_check_write+0x14/0x20 [ 59.475367] ? do_raw_write_lock+0xbd/0x1b0 [ 59.479674] integrity_inode_free+0x12f/0x320 [ 59.484157] security_inode_free+0x19/0x90 [ 59.488378] __destroy_inode+0x328/0x820 [ 59.492430] ? generic_update_time+0x450/0x450 [ 59.496997] ? evict+0x5d8/0x980 [ 59.500353] ? lock_downgrade+0x900/0x900 [ 59.504496] ? __inode_wait_for_writeback+0x2cf/0x380 [ 59.509677] destroy_inode+0xda/0x200 [ 59.513467] ? __destroy_inode+0x820/0x820 [ 59.517683] ? kasan_check_write+0x14/0x20 [ 59.521909] ? do_raw_spin_lock+0xc1/0x200 [ 59.526134] evict+0x5e0/0x980 [ 59.529339] ? jbd2_journal_stop+0x430/0x15d0 [ 59.533876] ? destroy_inode+0x200/0x200 [ 59.537935] ? do_raw_spin_lock+0xc1/0x200 [ 59.542209] ? iput+0x671/0xa90 [ 59.545479] ? lock_downgrade+0x900/0x900 [ 59.549617] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 59.555147] ? kasan_check_read+0x11/0x20 [ 59.559278] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 59.563841] ? lock_downgrade+0x900/0x900 [ 59.567973] ? ext4_ioctl+0x231b/0x4210 [ 59.571931] iput+0x679/0xa90 [ 59.575020] ? inode_add_lru+0x2a0/0x2a0 [ 59.579062] ? up_write+0x7b/0x220 [ 59.582639] ? up_read+0x110/0x110 [ 59.586180] ? up_read+0x110/0x110 [ 59.589707] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.595233] ? check_preemption_disabled+0x48/0x200 [ 59.600239] ext4_ioctl+0x236f/0x4210 [ 59.604030] ? is_bpf_text_address+0xac/0x170 [ 59.608511] ? ext4_ioctl_group_add+0x560/0x560 [ 59.613244] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 59.619104] ? kasan_check_read+0x11/0x20 [ 59.623257] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 59.628516] ? rcu_bh_qs+0xc0/0xc0 [ 59.632040] ? unwind_dump+0x190/0x190 [ 59.635912] ? is_bpf_text_address+0xd3/0x170 [ 59.640843] ? kernel_text_address+0x79/0xf0 [ 59.645241] ? __kernel_text_address+0xd/0x40 [ 59.649722] ? unwind_get_return_address+0x61/0xa0 [ 59.654638] ? __save_stack_trace+0x8d/0xf0 [ 59.658944] ? save_stack+0xa9/0xd0 [ 59.662553] ? save_stack+0x43/0xd0 [ 59.666161] ? __kasan_slab_free+0x102/0x150 [ 59.670551] ? kasan_slab_free+0xe/0x10 [ 59.674515] ? kmem_cache_free+0x83/0x290 [ 59.678644] ? putname+0xf2/0x130 [ 59.682081] ? do_sys_open+0x54d/0x700 [ 59.685951] ? __x64_sys_openat+0x9d/0x100 [ 59.690169] ? do_syscall_64+0x1b9/0x820 [ 59.694325] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 59.699684] ? trace_hardirqs_off+0xb8/0x310 [ 59.704079] ? kasan_check_read+0x11/0x20 [ 59.708330] ? do_raw_spin_unlock+0xa7/0x2f0 [ 59.712727] ? trace_hardirqs_on+0x310/0x310 [ 59.717484] ? kasan_check_write+0x14/0x20 [ 59.721709] ? trace_hardirqs_off+0xb8/0x310 [ 59.726120] ? trace_hardirqs_on+0x310/0x310 [ 59.730622] ? ext4_ioctl_group_add+0x560/0x560 [ 59.735284] do_vfs_ioctl+0x1de/0x1720 [ 59.739165] ? trace_hardirqs_on+0xbd/0x310 [ 59.743478] ? ioctl_preallocate+0x300/0x300 [ 59.747868] ? memset+0x31/0x40 [ 59.751132] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.756653] ? smack_file_ioctl+0x210/0x3c0 [ 59.761078] ? fget_raw+0x20/0x20 [ 59.764528] ? smack_file_lock+0x2e0/0x2e0 [ 59.768870] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.774435] ? security_file_ioctl+0x94/0xc0 [ 59.778832] ksys_ioctl+0xa9/0xd0 [ 59.782278] __x64_sys_ioctl+0x73/0xb0 [ 59.786150] do_syscall_64+0x1b9/0x820 [ 59.790020] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 59.795368] ? syscall_return_slowpath+0x5e0/0x5e0 [ 59.800277] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 59.805114] ? trace_hardirqs_on_caller+0x310/0x310 [ 59.810115] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 59.815114] ? prepare_exit_to_usermode+0x291/0x3b0 [ 59.820112] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 59.824992] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 59.830211] RIP: 0033:0x440009 [ 59.833410] 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 [ 59.852299] RSP: 002b:00007ffcd0621678 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 59.860005] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 59.867299] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 59.874569] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 59.881818] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 59.889074] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 59.896332] Modules linked in: [ 59.899860] ---[ end trace c37475573060cb3f ]--- [ 59.904646] RIP: 0010:rb_erase+0x306/0x3710 [ 59.908953] 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 [ 59.927898] RSP: 0018:ffff8801ce93e918 EFLAGS: 00010202 [ 59.933623] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 59.940885] RDX: 1ffff10039d27d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 59.948215] RBP: ffff8801ce93f320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 59.955528] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b8a838b0 [ 59.962785] R13: dffffc0000000000 R14: ffff8801ce93f2f8 R15: ffff8801ce93f438 [ 59.970156] FS: 0000000001520880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 59.978442] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.984366] CR2: 0000000020000080 CR3: 00000001bbb62000 CR4: 00000000001406e0 [ 59.991697] Kernel panic - not syncing: Fatal exception [ 59.997942] Kernel Offset: disabled [ 60.001564] Rebooting in 86400 seconds..