[ 37.872764] audit: type=1800 audit(1538394603.501:22): pid=5927 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0 [ 37.900270] audit: type=1800 audit(1538394603.501:23): pid=5927 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rsyslog" dev="sda1" ino=2442 res=0 [ 37.920492] audit: type=1800 audit(1538394603.501:24): pid=5927 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. [....] 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 '10.128.10.19' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 49.509917] kasan: CONFIG_KASAN_INLINE enabled [ 49.514546] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 49.522054] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 49.528298] CPU: 0 PID: 6080 Comm: syz-executor949 Not tainted 4.19.0-rc5-next-20180928+ #84 [ 49.536857] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.546293] RIP: 0010:rb_erase+0x306/0x3710 [ 49.550601] 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 [ 49.569594] RSP: 0018:ffff8801d4a6e918 EFLAGS: 00010202 [ 49.574967] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 49.582229] RDX: 1ffff1003a94dd2b RSI: ffffffff8afa83c0 RDI: 0000000000000008 [ 49.589485] RBP: ffff8801d4a6f320 R08: dffffc0000000000 R09: fffffbfff12d6fb8 [ 49.596743] R10: fffffbfff12d6fb8 R11: ffffffff896b7dc3 R12: ffff8801c4c2f2f0 [ 49.604004] R13: dffffc0000000000 R14: ffff8801d4a6f2f8 R15: ffff8801d4a6f438 [ 49.611262] FS: 00000000018e7880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 49.619472] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.625360] CR2: 0000000020000080 CR3: 00000001d49c5000 CR4: 00000000001406f0 [ 49.632620] Call Trace: [ 49.635196] ? find_get_entry+0x2f2/0xc40 [ 49.639477] ? rb_insert_color+0x1460/0x1460 [ 49.644016] ? add_to_page_cache_lru+0xdb0/0xdb0 [ 49.648764] ? is_bpf_text_address+0xac/0x170 [ 49.653247] ? lock_downgrade+0x900/0x900 [ 49.657385] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 49.662326] ? mark_held_locks+0x130/0x130 [ 49.666549] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 49.671817] ? rcu_softirq_qs+0x20/0x20 [ 49.675783] ? unwind_dump+0x190/0x190 [ 49.679663] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 49.685190] ? mark_page_accessed+0xcaf/0x2040 [ 49.689763] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 49.695286] ? activate_page+0x1040/0x1040 [ 49.699508] ? mark_held_locks+0x130/0x130 [ 49.703737] ? unwind_get_return_address+0x61/0xa0 [ 49.708661] ? __save_stack_trace+0x8d/0xf0 [ 49.712983] ? pagecache_get_page+0x2d8/0xf00 [ 49.717474] ? process_measurement+0x15c4/0x1bf0 [ 49.722212] ? ima_file_check+0xe5/0x130 [ 49.726258] ? find_get_pages_contig+0x15b0/0x15b0 [ 49.731244] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 49.736254] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 49.741075] ? is_bpf_text_address+0xac/0x170 [ 49.745563] ? lock_downgrade+0x900/0x900 [ 49.749701] ? mark_held_locks+0x130/0x130 [ 49.754027] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 49.758949] ? mark_held_locks+0x130/0x130 [ 49.763191] ? ext4_discard_preallocations+0x9b4/0x13b0 [ 49.768544] ? lock_downgrade+0x900/0x900 [ 49.772682] ? kasan_check_read+0x11/0x20 [ 49.776816] ? do_raw_spin_unlock+0xa7/0x2f0 [ 49.781214] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 49.785786] ? mark_held_locks+0x130/0x130 [ 49.790012] ? _raw_spin_unlock+0x2c/0x50 [ 49.794147] ? ext4_discard_preallocations+0x18a/0x13b0 [ 49.799500] ? __getblk_gfp+0x102/0x1040 [ 49.803550] ? ext4_exit_mballoc+0xc0/0xc0 [ 49.807882] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 49.812887] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 49.817697] ? modules_open+0xa0/0xa0 [ 49.821494] ? __es_tree_search.isra.12+0x1ba/0x220 [ 49.826499] ? __es_remove_extent+0x9a3/0xba0 [ 49.830981] ? mark_held_locks+0x130/0x130 [ 49.835204] ? lock_downgrade+0x900/0x900 [ 49.839339] ? ext4_es_scan+0x950/0x950 [ 49.843301] ? lock_release+0x970/0x970 [ 49.847271] ? trace_hardirqs_on+0xbd/0x310 [ 49.851632] ? kasan_check_read+0x11/0x20 [ 49.855775] ? clear_inode+0x114/0x3a0 [ 49.859691] ? do_raw_write_trylock+0x1c0/0x1c0 [ 49.864354] ? kasan_check_write+0x14/0x20 [ 49.868581] ? lock_acquire+0x1ed/0x520 [ 49.872542] ? integrity_inode_free+0x77/0x320 [ 49.877112] ? ext4_es_remove_extent+0x14c/0x4f0 [ 49.881852] ? lock_release+0x970/0x970 [ 49.885816] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 49.890904] ? depot_save_stack+0x292/0x470 [ 49.895214] ? kasan_check_write+0x14/0x20 [ 49.899437] ? do_raw_write_lock+0xbd/0x1b0 [ 49.903751] integrity_inode_free+0x12f/0x320 [ 49.908310] security_inode_free+0x19/0x90 [ 49.912543] __destroy_inode+0x328/0x820 [ 49.916595] ? generic_update_time+0x450/0x450 [ 49.921168] ? evict+0x5d8/0x980 [ 49.924527] ? lock_downgrade+0x900/0x900 [ 49.928677] ? __inode_wait_for_writeback+0x2cf/0x380 [ 49.933856] destroy_inode+0xda/0x200 [ 49.937645] ? __destroy_inode+0x820/0x820 [ 49.941879] ? kasan_check_write+0x14/0x20 [ 49.946101] ? do_raw_spin_lock+0xc1/0x200 [ 49.950324] evict+0x5e0/0x980 [ 49.953504] ? jbd2_journal_stop+0x430/0x15c0 [ 49.957990] ? destroy_inode+0x200/0x200 [ 49.962037] ? do_raw_spin_lock+0xc1/0x200 [ 49.966273] ? iput+0x66c/0xa90 [ 49.969553] ? lock_downgrade+0x900/0x900 [ 49.973694] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 49.979226] ? kasan_check_read+0x11/0x20 [ 49.983368] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 49.987950] ? lock_downgrade+0x900/0x900 [ 49.992086] ? ext4_ioctl+0x2316/0x4210 [ 49.996052] iput+0x674/0xa90 [ 49.999147] ? inode_add_lru+0x2a0/0x2a0 [ 50.003192] ? up_write+0x7b/0x220 [ 50.006721] ? down_write_nested+0x130/0x130 [ 50.011216] ? down_write_nested+0x130/0x130 [ 50.015620] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.021150] ? check_preemption_disabled+0x48/0x200 [ 50.026163] ext4_ioctl+0x236a/0x4210 [ 50.029958] ? is_bpf_text_address+0xac/0x170 [ 50.034461] ? ext4_ioctl_group_add+0x560/0x560 [ 50.039121] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 50.044139] ? kasan_check_read+0x11/0x20 [ 50.048282] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 50.053552] ? rcu_softirq_qs+0x20/0x20 [ 50.057517] ? unwind_dump+0x190/0x190 [ 50.061392] ? is_bpf_text_address+0xd3/0x170 [ 50.065877] ? kernel_text_address+0x79/0xf0 [ 50.070273] ? __kernel_text_address+0xd/0x40 [ 50.074756] ? unwind_get_return_address+0x61/0xa0 [ 50.079674] ? __save_stack_trace+0x8d/0xf0 [ 50.083984] ? save_stack+0xa9/0xd0 [ 50.087597] ? save_stack+0x43/0xd0 [ 50.091210] ? __kasan_slab_free+0x102/0x150 [ 50.095612] ? kasan_slab_free+0xe/0x10 [ 50.099577] ? kmem_cache_free+0x83/0x290 [ 50.103716] ? putname+0xf2/0x130 [ 50.107158] ? do_sys_open+0x54d/0x700 [ 50.111029] ? __x64_sys_openat+0x9d/0x100 [ 50.115252] ? do_syscall_64+0x1b9/0x820 [ 50.119307] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.124774] ? trace_hardirqs_off+0xb8/0x310 [ 50.129173] ? kasan_check_read+0x11/0x20 [ 50.133308] ? do_raw_spin_unlock+0xa7/0x2f0 [ 50.137705] ? trace_hardirqs_on+0x310/0x310 [ 50.142099] ? kasan_check_write+0x14/0x20 [ 50.146327] ? trace_hardirqs_off+0xb8/0x310 [ 50.150724] ? trace_hardirqs_on+0x310/0x310 [ 50.155126] ? ext4_ioctl_group_add+0x560/0x560 [ 50.159784] do_vfs_ioctl+0x1de/0x1720 [ 50.163659] ? trace_hardirqs_on+0xbd/0x310 [ 50.167972] ? ioctl_preallocate+0x300/0x300 [ 50.172376] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.177900] ? __fget_light+0x2e9/0x430 [ 50.181866] ? fget_raw+0x20/0x20 [ 50.185307] ? putname+0xf2/0x130 [ 50.188747] ? kmem_cache_free+0x21a/0x290 [ 50.192968] ? putname+0xf7/0x130 [ 50.196413] ? security_file_ioctl+0x94/0xc0 [ 50.200808] ksys_ioctl+0xa9/0xd0 [ 50.204245] __x64_sys_ioctl+0x73/0xb0 [ 50.208124] do_syscall_64+0x1b9/0x820 [ 50.212002] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 50.217355] ? syscall_return_slowpath+0x5e0/0x5e0 [ 50.222270] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.227101] ? trace_hardirqs_on_caller+0x310/0x310 [ 50.232105] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 50.237107] ? prepare_exit_to_usermode+0x291/0x3b0 [ 50.242117] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.246954] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.252130] RIP: 0033:0x440089 [ 50.255313] 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 [ 50.274201] RSP: 002b:00007ffe68e0ca68 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 50.281901] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 50.289156] RDX: 0000000000440089 RSI: 0000000000006611 RDI: 0000000000000003 [ 50.296409] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 50.303665] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401910 [ 50.310970] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 50.318277] Modules linked in: [ 50.321571] ---[ end trace dd5e85f3dfb98759 ]--- [ 50.326383] RIP: 0010:rb_erase+0x306/0x3710 [ 50.330770] 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 [ 50.349897] RSP: 0018:ffff8801d4a6e918 EFLAGS: 00010202 [ 50.355268] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 50.362565] RDX: 1ffff1003a94dd2b RSI: ffffffff8afa83c0 RDI: 0000000000000008 [ 50.369859] RBP: ffff8801d4a6f320 R08: dffffc0000000000 R09: fffffbfff12d6fb8 [ 50.377159] R10: fffffbfff12d6fb8 R11: ffffffff896b7dc3 R12: ffff8801c4c2f2f0 [ 50.384433] R13: dffffc0000000000 R14: ffff8801d4a6f2f8 R15: ffff8801d4a6f438 [ 50.391731] FS: 00000000018e7880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 50.399990] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 50.405870] CR2: 0000000020000080 CR3: 00000001d49c5000 CR4: 00000000001406f0 [ 50.413169] Kernel panic - not syncing: Fatal exception [ 50.419499] Kernel Offset: disabled [ 50.423178] Rebooting in 86400 seconds..