[ 36.635685] audit: type=1800 audit(1538162249.481:24): pid=5678 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. [ 37.064225] audit: type=1800 audit(1538162249.991:25): pid=5678 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 37.096021] audit: type=1800 audit(1538162249.991:26): pid=5678 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 '10.128.10.44' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 47.979530] kasan: CONFIG_KASAN_INLINE enabled [ 47.984170] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 47.991568] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 47.997809] CPU: 0 PID: 5831 Comm: syz-executor945 Not tainted 4.19.0-rc5+ #120 [ 48.005243] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.014591] RIP: 0010:rb_erase+0x306/0x3710 [ 48.018902] 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 [ 48.037790] RSP: 0018:ffff8801c38c6918 EFLAGS: 00010202 [ 48.043141] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 48.050394] RDX: 1ffff10038718d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 48.057645] RBP: ffff8801c38c7320 R08: dffffc0000000000 R09: fffffbfff12d6a48 [ 48.064896] R10: fffffbfff12d6a48 R11: ffffffff896b5243 R12: ffff8801b932f970 [ 48.072149] R13: dffffc0000000000 R14: ffff8801c38c72f8 R15: ffff8801c38c7438 [ 48.079402] FS: 00000000023e2880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 48.087610] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.093474] CR2: 0000000020000080 CR3: 00000001c001a000 CR4: 00000000001406f0 [ 48.100730] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.107985] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.115238] Call Trace: [ 48.117829] ? rb_insert_color+0x1460/0x1460 [ 48.122238] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 48.127162] ? lock_downgrade+0x900/0x900 [ 48.131305] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 48.137089] ? mark_held_locks+0x130/0x130 [ 48.141318] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 48.146584] ? rcu_bh_qs+0xc0/0xc0 [ 48.150111] ? unwind_dump+0x190/0x190 [ 48.153992] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 48.159527] ? mark_held_locks+0x130/0x130 [ 48.163823] ? mark_page_accessed+0xcb0/0x2040 [ 48.168399] ? activate_page+0x1040/0x1040 [ 48.172625] ? activate_page+0x1040/0x1040 [ 48.176853] ? mark_held_locks+0x130/0x130 [ 48.181076] ? kasan_kmalloc+0xc7/0xe0 [ 48.184952] ? kmem_cache_alloc_trace+0x152/0x750 [ 48.189785] ? ima_add_digest_entry+0xcb/0x6a0 [ 48.194354] ? ima_add_template_entry+0x466/0x7f0 [ 48.199187] ? ima_store_template+0x224/0x310 [ 48.203675] ? pagecache_get_page+0x2d8/0xf00 [ 48.208302] ? find_get_pages_contig+0x15b0/0x15b0 [ 48.213227] ? is_bpf_text_address+0xac/0x170 [ 48.217712] ? lock_downgrade+0x900/0x900 [ 48.221852] ? mark_held_locks+0x130/0x130 [ 48.226080] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 48.231869] ? mark_held_locks+0x130/0x130 [ 48.236096] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 48.241558] ? lock_downgrade+0x900/0x900 [ 48.245825] ? kasan_check_read+0x11/0x20 [ 48.250096] ? do_raw_spin_unlock+0xa7/0x2f0 [ 48.254509] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 48.259090] ? mark_held_locks+0x130/0x130 [ 48.263329] ? _raw_spin_unlock+0x2c/0x50 [ 48.267499] ? ext4_discard_preallocations+0x18a/0x13c0 [ 48.272867] ? trace_hardirqs_on+0xbd/0x310 [ 48.277296] ? ext4_exit_mballoc+0xc0/0xc0 [ 48.281536] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 48.286549] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 48.291301] ? modules_open+0xa0/0xa0 [ 48.295099] ? __es_tree_search.isra.12+0x1ba/0x220 [ 48.300114] ? __es_remove_extent+0x9a3/0xba0 [ 48.304605] ? mark_held_locks+0x130/0x130 [ 48.308926] ? lock_downgrade+0x900/0x900 [ 48.313072] ? ext4_es_scan+0x960/0x960 [ 48.317068] ? lock_release+0x970/0x970 [ 48.321077] ? trace_hardirqs_on+0xbd/0x310 [ 48.325396] ? kasan_check_read+0x11/0x20 [ 48.329739] ? clear_inode+0x114/0x3a0 [ 48.333639] ? do_raw_write_trylock+0x1c0/0x1c0 [ 48.338431] ? kasan_check_write+0x14/0x20 [ 48.342696] ? lock_acquire+0x1ed/0x520 [ 48.346668] ? integrity_inode_free+0x77/0x320 [ 48.351251] ? ext4_es_remove_extent+0x151/0x500 [ 48.356175] ? lock_release+0x970/0x970 [ 48.360278] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 48.365523] ? depot_save_stack+0x292/0x470 [ 48.369843] ? kasan_check_write+0x14/0x20 [ 48.374071] ? do_raw_write_lock+0xbd/0x1b0 [ 48.378387] integrity_inode_free+0x12f/0x320 [ 48.382878] security_inode_free+0x19/0x90 [ 48.387105] __destroy_inode+0x328/0x820 [ 48.391158] ? generic_update_time+0x450/0x450 [ 48.395732] ? evict+0x5d8/0x980 [ 48.399100] ? lock_downgrade+0x900/0x900 [ 48.403245] ? __inode_wait_for_writeback+0x2cf/0x380 [ 48.408433] destroy_inode+0xda/0x200 [ 48.412252] ? __destroy_inode+0x820/0x820 [ 48.416494] ? kasan_check_write+0x14/0x20 [ 48.420722] ? do_raw_spin_lock+0xc1/0x200 [ 48.424953] evict+0x5e0/0x980 [ 48.428139] ? jbd2_journal_stop+0x430/0x15d0 [ 48.432629] ? destroy_inode+0x200/0x200 [ 48.436686] ? do_raw_spin_lock+0xc1/0x200 [ 48.440913] ? iput+0x671/0xa90 [ 48.444187] ? lock_downgrade+0x900/0x900 [ 48.448330] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 48.453859] ? kasan_check_read+0x11/0x20 [ 48.458253] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 48.462993] ? lock_downgrade+0x900/0x900 [ 48.467285] ? ext4_ioctl+0x231b/0x4210 [ 48.471259] iput+0x679/0xa90 [ 48.474363] ? inode_add_lru+0x2a0/0x2a0 [ 48.478418] ? up_write+0x7b/0x220 [ 48.481979] ? up_read+0x110/0x110 [ 48.485515] ? up_read+0x110/0x110 [ 48.489055] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.494598] ? check_preemption_disabled+0x48/0x200 [ 48.499624] ext4_ioctl+0x236f/0x4210 [ 48.503423] ? is_bpf_text_address+0xac/0x170 [ 48.507948] ? ext4_ioctl_group_add+0x560/0x560 [ 48.512614] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 48.518408] ? kasan_check_read+0x11/0x20 [ 48.522553] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 48.527831] ? rcu_bh_qs+0xc0/0xc0 [ 48.531378] ? unwind_dump+0x190/0x190 [ 48.535417] ? is_bpf_text_address+0xd3/0x170 [ 48.539946] ? kernel_text_address+0x79/0xf0 [ 48.544347] ? __kernel_text_address+0xd/0x40 [ 48.548836] ? unwind_get_return_address+0x61/0xa0 [ 48.553759] ? __save_stack_trace+0x8d/0xf0 [ 48.558077] ? save_stack+0xa9/0xd0 [ 48.561696] ? save_stack+0x43/0xd0 [ 48.565314] ? __kasan_slab_free+0x102/0x150 [ 48.569716] ? kasan_slab_free+0xe/0x10 [ 48.573684] ? kmem_cache_free+0x83/0x290 [ 48.577831] ? putname+0xf2/0x130 [ 48.581288] ? do_sys_open+0x54d/0x700 [ 48.585167] ? __x64_sys_openat+0x9d/0x100 [ 48.589525] ? do_syscall_64+0x1b9/0x820 [ 48.593583] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.599082] ? trace_hardirqs_off+0xb8/0x310 [ 48.603591] ? kasan_check_read+0x11/0x20 [ 48.607915] ? do_raw_spin_unlock+0xa7/0x2f0 [ 48.612341] ? trace_hardirqs_on+0x310/0x310 [ 48.616744] ? kasan_check_write+0x14/0x20 [ 48.620978] ? trace_hardirqs_off+0xb8/0x310 [ 48.625674] ? trace_hardirqs_on+0x310/0x310 [ 48.630083] ? ext4_ioctl_group_add+0x560/0x560 [ 48.634751] do_vfs_ioctl+0x1de/0x1720 [ 48.638634] ? trace_hardirqs_on+0xbd/0x310 [ 48.642966] ? ioctl_preallocate+0x300/0x300 [ 48.647367] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.652899] ? __fget_light+0x2e9/0x430 [ 48.656871] ? fget_raw+0x20/0x20 [ 48.660484] ? putname+0xf2/0x130 [ 48.663935] ? kmem_cache_free+0x21a/0x290 [ 48.668487] ? putname+0xf7/0x130 [ 48.671941] ? security_file_ioctl+0x94/0xc0 [ 48.676346] ksys_ioctl+0xa9/0xd0 [ 48.679806] __x64_sys_ioctl+0x73/0xb0 [ 48.683696] do_syscall_64+0x1b9/0x820 [ 48.687769] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 48.693288] ? syscall_return_slowpath+0x5e0/0x5e0 [ 48.698215] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.703052] ? trace_hardirqs_on_caller+0x310/0x310 [ 48.708061] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 48.713073] ? prepare_exit_to_usermode+0x291/0x3b0 [ 48.718083] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.722922] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.728104] RIP: 0033:0x440009 [ 48.731292] 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 [ 48.750271] RSP: 002b:00007fff8ec5a268 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 48.757979] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 48.765241] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 48.772502] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 48.779870] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 48.787233] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 48.794508] Modules linked in: [ 48.797872] ---[ end trace 241db4983ecb1bda ]--- [ 48.802662] RIP: 0010:rb_erase+0x306/0x3710 [ 48.806997] 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 [ 48.826362] RSP: 0018:ffff8801c38c6918 EFLAGS: 00010202 [ 48.831764] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 48.839068] RDX: 1ffff10038718d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 48.846351] RBP: ffff8801c38c7320 R08: dffffc0000000000 R09: fffffbfff12d6a48 [ 48.853777] R10: fffffbfff12d6a48 R11: ffffffff896b5243 R12: ffff8801b932f970 [ 48.861071] R13: dffffc0000000000 R14: ffff8801c38c72f8 R15: ffff8801c38c7438 [ 48.868373] FS: 00000000023e2880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 48.876600] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.882547] CR2: 0000000020000080 CR3: 00000001c001a000 CR4: 00000000001406f0 [ 48.889989] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.897255] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.904562] Kernel panic - not syncing: Fatal exception [ 48.911120] Kernel Offset: disabled [ 48.914872] Rebooting in 86400 seconds..