[ 34.887484] audit: type=1800 audit(1539238695.861:24): pid=5675 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. [ 35.208930] audit: type=1800 audit(1539238696.271:25): pid=5675 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 35.228135] audit: type=1800 audit(1539238696.271:26): pid=5675 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 '10.128.0.87' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.719690] kasan: CONFIG_KASAN_INLINE enabled [ 43.724313] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 43.731738] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 43.737977] CPU: 0 PID: 5827 Comm: syz-executor611 Not tainted 4.19.0-rc6+ #136 [ 43.745404] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.754755] RIP: 0010:rb_erase+0x306/0x3710 [ 43.759066] 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 [ 43.777953] RSP: 0018:ffff8801bc3a6918 EFLAGS: 00010202 [ 43.783299] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 43.790576] RDX: 1ffff10037874d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 43.797831] RBP: ffff8801bc3a7320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 43.805084] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b8f1d970 [ 43.812344] R13: dffffc0000000000 R14: ffff8801bc3a72f8 R15: ffff8801bc3a7438 [ 43.819620] FS: 0000000000c0d880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 43.827849] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.833712] CR2: 0000000020000080 CR3: 00000001d5b83000 CR4: 00000000001406f0 [ 43.840972] Call Trace: [ 43.843556] ? rb_insert_color+0x1460/0x1460 [ 43.847959] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 43.852882] ? lock_downgrade+0x900/0x900 [ 43.857018] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 43.862797] ? mark_held_locks+0x130/0x130 [ 43.867017] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 43.872278] ? rcu_bh_qs+0xc0/0xc0 [ 43.875815] ? unwind_dump+0x190/0x190 [ 43.879692] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 43.885216] ? mark_held_locks+0x130/0x130 [ 43.889436] ? mark_page_accessed+0xcb0/0x2040 [ 43.893998] ? activate_page+0x1040/0x1040 [ 43.898219] ? activate_page+0x1040/0x1040 [ 43.902444] ? mark_held_locks+0x130/0x130 [ 43.906661] ? kasan_kmalloc+0xc7/0xe0 [ 43.910533] ? kmem_cache_alloc_trace+0x152/0x750 [ 43.915369] ? ima_add_digest_entry+0xcb/0x6a0 [ 43.919934] ? ima_add_template_entry+0x466/0x7f0 [ 43.924762] ? ima_store_template+0x224/0x310 [ 43.929248] ? pagecache_get_page+0x2d8/0xf00 [ 43.933730] ? find_get_pages_contig+0x15b0/0x15b0 [ 43.938669] ? is_bpf_text_address+0xac/0x170 [ 43.943166] ? lock_downgrade+0x900/0x900 [ 43.947298] ? mark_held_locks+0x130/0x130 [ 43.951519] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 43.957322] ? mark_held_locks+0x130/0x130 [ 43.961546] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 43.966901] ? lock_downgrade+0x900/0x900 [ 43.971037] ? kasan_check_read+0x11/0x20 [ 43.975169] ? do_raw_spin_unlock+0xa7/0x2f0 [ 43.979565] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 43.984133] ? mark_held_locks+0x130/0x130 [ 43.988365] ? _raw_spin_unlock+0x2c/0x50 [ 43.992498] ? ext4_discard_preallocations+0x18a/0x13c0 [ 43.997847] ? trace_hardirqs_on+0xbd/0x310 [ 44.002154] ? ext4_exit_mballoc+0xc0/0xc0 [ 44.006377] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 44.011392] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 44.016151] ? modules_open+0xa0/0xa0 [ 44.019937] ? __es_tree_search.isra.12+0x1ba/0x220 [ 44.024938] ? __es_remove_extent+0x9a3/0xba0 [ 44.029421] ? mark_held_locks+0x130/0x130 [ 44.033640] ? lock_downgrade+0x900/0x900 [ 44.037792] ? ext4_es_scan+0x960/0x960 [ 44.041749] ? lock_release+0x970/0x970 [ 44.045707] ? trace_hardirqs_on+0xbd/0x310 [ 44.050011] ? kasan_check_read+0x11/0x20 [ 44.054140] ? clear_inode+0x114/0x3a0 [ 44.058014] ? do_raw_write_trylock+0x1c0/0x1c0 [ 44.062669] ? kasan_check_write+0x14/0x20 [ 44.066890] ? lock_acquire+0x1ed/0x520 [ 44.070849] ? integrity_inode_free+0x77/0x320 [ 44.075415] ? ext4_es_remove_extent+0x151/0x500 [ 44.080158] ? lock_release+0x970/0x970 [ 44.084117] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 44.089202] ? depot_save_stack+0x292/0x470 [ 44.093507] ? kasan_check_write+0x14/0x20 [ 44.097729] ? do_raw_write_lock+0xbd/0x1b0 [ 44.102034] integrity_inode_free+0x12f/0x320 [ 44.106528] security_inode_free+0x19/0x90 [ 44.110759] __destroy_inode+0x328/0x820 [ 44.114819] ? generic_update_time+0x450/0x450 [ 44.119384] ? evict+0x5d8/0x980 [ 44.122735] ? lock_downgrade+0x900/0x900 [ 44.126869] ? __inode_wait_for_writeback+0x2cf/0x380 [ 44.132061] destroy_inode+0xda/0x200 [ 44.135850] ? __destroy_inode+0x820/0x820 [ 44.140072] ? kasan_check_write+0x14/0x20 [ 44.144293] ? do_raw_spin_lock+0xc1/0x200 [ 44.148513] evict+0x5e0/0x980 [ 44.151692] ? jbd2_journal_stop+0x430/0x15d0 [ 44.156174] ? destroy_inode+0x200/0x200 [ 44.160220] ? do_raw_spin_lock+0xc1/0x200 [ 44.164437] ? iput+0x671/0xa90 [ 44.167703] ? lock_downgrade+0x900/0x900 [ 44.171836] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 44.177375] ? kasan_check_read+0x11/0x20 [ 44.181507] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 44.186074] ? lock_downgrade+0x900/0x900 [ 44.190209] ? ext4_ioctl+0x231b/0x4210 [ 44.194182] iput+0x679/0xa90 [ 44.197295] ? inode_add_lru+0x2a0/0x2a0 [ 44.201340] ? up_write+0x7b/0x220 [ 44.204861] ? up_read+0x110/0x110 [ 44.208387] ? up_read+0x110/0x110 [ 44.211914] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.217440] ? check_preemption_disabled+0x48/0x200 [ 44.222462] ext4_ioctl+0x236f/0x4210 [ 44.226251] ? is_bpf_text_address+0xac/0x170 [ 44.230734] ? ext4_ioctl_group_add+0x560/0x560 [ 44.235390] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 44.241172] ? kasan_check_read+0x11/0x20 [ 44.245309] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 44.250578] ? rcu_bh_qs+0xc0/0xc0 [ 44.254102] ? unwind_dump+0x190/0x190 [ 44.257978] ? is_bpf_text_address+0xd3/0x170 [ 44.262459] ? kernel_text_address+0x79/0xf0 [ 44.266853] ? __kernel_text_address+0xd/0x40 [ 44.271335] ? unwind_get_return_address+0x61/0xa0 [ 44.276253] ? __save_stack_trace+0x8d/0xf0 [ 44.280585] ? save_stack+0xa9/0xd0 [ 44.284207] ? save_stack+0x43/0xd0 [ 44.287817] ? __kasan_slab_free+0x102/0x150 [ 44.292209] ? kasan_slab_free+0xe/0x10 [ 44.296184] ? kmem_cache_free+0x83/0x290 [ 44.300332] ? putname+0xf2/0x130 [ 44.303769] ? do_sys_open+0x54d/0x700 [ 44.307664] ? __x64_sys_openat+0x9d/0x100 [ 44.311884] ? do_syscall_64+0x1b9/0x820 [ 44.315931] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.321296] ? trace_hardirqs_off+0xb8/0x310 [ 44.325698] ? kasan_check_read+0x11/0x20 [ 44.329919] ? do_raw_spin_unlock+0xa7/0x2f0 [ 44.334311] ? trace_hardirqs_on+0x310/0x310 [ 44.338717] ? kasan_check_write+0x14/0x20 [ 44.342938] ? trace_hardirqs_off+0xb8/0x310 [ 44.347330] ? trace_hardirqs_on+0x310/0x310 [ 44.351844] ? ext4_ioctl_group_add+0x560/0x560 [ 44.356517] do_vfs_ioctl+0x1de/0x1720 [ 44.360387] ? trace_hardirqs_on+0xbd/0x310 [ 44.364711] ? ioctl_preallocate+0x300/0x300 [ 44.369108] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.374628] ? __fget_light+0x2e9/0x430 [ 44.378605] ? fget_raw+0x20/0x20 [ 44.382042] ? putname+0xf2/0x130 [ 44.385482] ? kmem_cache_free+0x21a/0x290 [ 44.389722] ? putname+0xf7/0x130 [ 44.393169] ? security_file_ioctl+0x94/0xc0 [ 44.397568] ksys_ioctl+0xa9/0xd0 [ 44.401010] __x64_sys_ioctl+0x73/0xb0 [ 44.404885] do_syscall_64+0x1b9/0x820 [ 44.408761] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 44.414108] ? syscall_return_slowpath+0x5e0/0x5e0 [ 44.419022] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.423850] ? trace_hardirqs_on_caller+0x310/0x310 [ 44.428852] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 44.433852] ? prepare_exit_to_usermode+0x291/0x3b0 [ 44.438894] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.443728] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.448901] RIP: 0033:0x440009 [ 44.452083] 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 [ 44.470994] RSP: 002b:00007fffd2dbec98 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 44.478713] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 44.485968] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 44.493237] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 44.500504] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 44.507759] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 44.515291] Modules linked in: [ 44.518613] ---[ end trace 04d0ea0c250652e0 ]--- [ 44.523388] RIP: 0010:rb_erase+0x306/0x3710 [ 44.527741] 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 [ 44.546696] RSP: 0018:ffff8801bc3a6918 EFLAGS: 00010202 [ 44.552071] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 44.559465] RDX: 1ffff10037874d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 44.566773] RBP: ffff8801bc3a7320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 44.574044] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b8f1d970 [ 44.581426] R13: dffffc0000000000 R14: ffff8801bc3a72f8 R15: ffff8801bc3a7438 [ 44.588738] FS: 0000000000c0d880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 44.596981] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.602864] CR2: 0000000020000080 CR3: 00000001d5b83000 CR4: 00000000001406f0 [ 44.610153] Kernel panic - not syncing: Fatal exception [ 44.616329] Kernel Offset: disabled [ 44.619962] Rebooting in 86400 seconds..