[ 34.419549] audit: type=1800 audit(1539141282.249:24): pid=5680 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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. [ 34.892953] audit: type=1800 audit(1539141282.789:25): pid=5680 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 34.919938] audit: type=1800 audit(1539141282.789:26): pid=5680 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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 '10.128.0.84' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 45.376878] kasan: CONFIG_KASAN_INLINE enabled [ 45.381474] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 45.388881] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 45.395150] CPU: 1 PID: 5833 Comm: syz-executor665 Not tainted 4.19.0-rc7+ #275 [ 45.402585] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.411938] RIP: 0010:rb_erase+0x306/0x3710 [ 45.416302] 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 [ 45.435197] RSP: 0018:ffff8801d772e918 EFLAGS: 00010202 [ 45.440547] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 45.447800] RDX: 1ffff1003aee5d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 45.455068] RBP: ffff8801d772f320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 45.462336] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b8f5a1f0 [ 45.469685] R13: dffffc0000000000 R14: ffff8801d772f2f8 R15: ffff8801d772f438 [ 45.476940] FS: 0000000001b14880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 45.485148] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.491010] CR2: 0000000020000080 CR3: 00000001bb42f000 CR4: 00000000001406e0 [ 45.498262] Call Trace: [ 45.500861] ? rb_insert_color+0x1460/0x1460 [ 45.505271] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 45.510186] ? lock_downgrade+0x900/0x900 [ 45.514323] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 45.520106] ? mark_held_locks+0x130/0x130 [ 45.524342] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 45.529604] ? rcu_bh_qs+0xc0/0xc0 [ 45.533141] ? unwind_dump+0x190/0x190 [ 45.537029] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 45.542565] ? mark_held_locks+0x130/0x130 [ 45.546785] ? mark_page_accessed+0xcb0/0x2040 [ 45.551349] ? activate_page+0x1040/0x1040 [ 45.555738] ? activate_page+0x1040/0x1040 [ 45.559968] ? mark_held_locks+0x130/0x130 [ 45.564202] ? kasan_kmalloc+0xc7/0xe0 [ 45.568073] ? kmem_cache_alloc_trace+0x152/0x750 [ 45.572897] ? ima_add_digest_entry+0xcb/0x6a0 [ 45.577459] ? ima_add_template_entry+0x466/0x7f0 [ 45.582290] ? ima_store_template+0x224/0x310 [ 45.586784] ? pagecache_get_page+0x2d8/0xf00 [ 45.591279] ? find_get_pages_contig+0x15b0/0x15b0 [ 45.596196] ? is_bpf_text_address+0xac/0x170 [ 45.600677] ? lock_downgrade+0x900/0x900 [ 45.604817] ? mark_held_locks+0x130/0x130 [ 45.609036] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 45.614823] ? mark_held_locks+0x130/0x130 [ 45.619136] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 45.624486] ? lock_downgrade+0x900/0x900 [ 45.628619] ? kasan_check_read+0x11/0x20 [ 45.632759] ? do_raw_spin_unlock+0xa7/0x2f0 [ 45.637171] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 45.641739] ? mark_held_locks+0x130/0x130 [ 45.645965] ? _raw_spin_unlock+0x2c/0x50 [ 45.650105] ? ext4_discard_preallocations+0x18a/0x13c0 [ 45.655453] ? trace_hardirqs_on+0xbd/0x310 [ 45.659767] ? ext4_exit_mballoc+0xc0/0xc0 [ 45.664271] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 45.669276] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 45.674016] ? modules_open+0xa0/0xa0 [ 45.677816] ? __es_tree_search.isra.12+0x1ba/0x220 [ 45.682816] ? __es_remove_extent+0x9a3/0xba0 [ 45.687294] ? mark_held_locks+0x130/0x130 [ 45.691509] ? lock_downgrade+0x900/0x900 [ 45.695637] ? ext4_es_scan+0x960/0x960 [ 45.699593] ? lock_release+0x970/0x970 [ 45.703551] ? trace_hardirqs_on+0xbd/0x310 [ 45.708027] ? kasan_check_read+0x11/0x20 [ 45.712158] ? clear_inode+0x114/0x3a0 [ 45.716028] ? do_raw_write_trylock+0x1c0/0x1c0 [ 45.720680] ? kasan_check_write+0x14/0x20 [ 45.724902] ? lock_acquire+0x1ed/0x520 [ 45.728859] ? integrity_inode_free+0x77/0x320 [ 45.733511] ? ext4_es_remove_extent+0x151/0x500 [ 45.738248] ? lock_release+0x970/0x970 [ 45.742212] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 45.747299] ? depot_save_stack+0x292/0x470 [ 45.751603] ? kasan_check_write+0x14/0x20 [ 45.755830] ? do_raw_write_lock+0xbd/0x1b0 [ 45.760133] integrity_inode_free+0x12f/0x320 [ 45.764629] security_inode_free+0x19/0x90 [ 45.768859] __destroy_inode+0x328/0x820 [ 45.772916] ? generic_update_time+0x450/0x450 [ 45.777487] ? evict+0x5d8/0x980 [ 45.780846] ? lock_downgrade+0x900/0x900 [ 45.784981] ? __inode_wait_for_writeback+0x2cf/0x380 [ 45.790166] destroy_inode+0xda/0x200 [ 45.793969] ? __destroy_inode+0x820/0x820 [ 45.798187] ? kasan_check_write+0x14/0x20 [ 45.802418] ? do_raw_spin_lock+0xc1/0x200 [ 45.806639] evict+0x5e0/0x980 [ 45.809826] ? jbd2_journal_stop+0x430/0x15d0 [ 45.814307] ? destroy_inode+0x200/0x200 [ 45.818353] ? do_raw_spin_lock+0xc1/0x200 [ 45.822565] ? iput+0x671/0xa90 [ 45.825837] ? lock_downgrade+0x900/0x900 [ 45.829969] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 45.835489] ? kasan_check_read+0x11/0x20 [ 45.839620] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 45.844188] ? lock_downgrade+0x900/0x900 [ 45.848320] ? ext4_ioctl+0x231b/0x4210 [ 45.852277] iput+0x679/0xa90 [ 45.855366] ? inode_add_lru+0x2a0/0x2a0 [ 45.859409] ? up_write+0x7b/0x220 [ 45.862929] ? up_read+0x110/0x110 [ 45.866450] ? up_read+0x110/0x110 [ 45.869973] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.875496] ? check_preemption_disabled+0x48/0x200 [ 45.880503] ext4_ioctl+0x236f/0x4210 [ 45.884291] ? is_bpf_text_address+0xac/0x170 [ 45.888777] ? ext4_ioctl_group_add+0x560/0x560 [ 45.893433] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 45.899212] ? kasan_check_read+0x11/0x20 [ 45.903349] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 45.908604] ? rcu_bh_qs+0xc0/0xc0 [ 45.912124] ? unwind_dump+0x190/0x190 [ 45.915999] ? is_bpf_text_address+0xd3/0x170 [ 45.920477] ? kernel_text_address+0x79/0xf0 [ 45.924872] ? __kernel_text_address+0xd/0x40 [ 45.929347] ? unwind_get_return_address+0x61/0xa0 [ 45.934266] ? __save_stack_trace+0x8d/0xf0 [ 45.938571] ? save_stack+0xa9/0xd0 [ 45.942176] ? save_stack+0x43/0xd0 [ 45.945783] ? __kasan_slab_free+0x102/0x150 [ 45.950175] ? kasan_slab_free+0xe/0x10 [ 45.954148] ? kmem_cache_free+0x83/0x290 [ 45.958297] ? putname+0xf2/0x130 [ 45.961735] ? do_sys_open+0x54d/0x700 [ 45.965614] ? __x64_sys_openat+0x9d/0x100 [ 45.969834] ? do_syscall_64+0x1b9/0x820 [ 45.973879] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.979228] ? trace_hardirqs_off+0xb8/0x310 [ 45.983618] ? kasan_check_read+0x11/0x20 [ 45.987756] ? do_raw_spin_unlock+0xa7/0x2f0 [ 45.992146] ? trace_hardirqs_on+0x310/0x310 [ 45.996536] ? kasan_check_write+0x14/0x20 [ 46.000762] ? trace_hardirqs_off+0xb8/0x310 [ 46.005156] ? trace_hardirqs_on+0x310/0x310 [ 46.009564] ? ext4_ioctl_group_add+0x560/0x560 [ 46.014237] do_vfs_ioctl+0x1de/0x1720 [ 46.018113] ? trace_hardirqs_on+0xbd/0x310 [ 46.022594] ? ioctl_preallocate+0x300/0x300 [ 46.026987] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.032504] ? __fget_light+0x2e9/0x430 [ 46.036463] ? fget_raw+0x20/0x20 [ 46.039897] ? putname+0xf2/0x130 [ 46.043334] ? kmem_cache_free+0x21a/0x290 [ 46.047552] ? putname+0xf7/0x130 [ 46.050990] ? security_file_ioctl+0x94/0xc0 [ 46.055381] ksys_ioctl+0xa9/0xd0 [ 46.058816] __x64_sys_ioctl+0x73/0xb0 [ 46.062684] do_syscall_64+0x1b9/0x820 [ 46.066553] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 46.071902] ? syscall_return_slowpath+0x5e0/0x5e0 [ 46.076813] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.081635] ? trace_hardirqs_on_caller+0x310/0x310 [ 46.086635] ? prepare_exit_to_usermode+0x291/0x3b0 [ 46.091640] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.096497] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.101682] RIP: 0033:0x440089 [ 46.104862] 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 [ 46.123754] RSP: 002b:00007ffd63c2ce08 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 46.131459] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 46.138709] RDX: 0000000000440089 RSI: 0000000000006611 RDI: 0000000000000003 [ 46.145959] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 46.153208] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401910 [ 46.160459] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 46.167716] Modules linked in: [ 46.171005] ---[ end trace 27de38256ff371c9 ]--- [ 46.175842] RIP: 0010:rb_erase+0x306/0x3710 [ 46.180164] 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 [ 46.199190] RSP: 0018:ffff8801d772e918 EFLAGS: 00010202 [ 46.204589] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 46.211860] RDX: 1ffff1003aee5d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 46.219164] RBP: ffff8801d772f320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 46.226448] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b8f5a1f0 [ 46.233732] R13: dffffc0000000000 R14: ffff8801d772f2f8 R15: ffff8801d772f438 [ 46.241020] FS: 0000000001b14880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 46.249265] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.255167] CR2: 0000000020000080 CR3: 00000001bb42f000 CR4: 00000000001406e0 [ 46.262423] Kernel panic - not syncing: Fatal exception [ 46.268630] Kernel Offset: disabled [ 46.272250] Rebooting in 86400 seconds..