[ 37.053142] audit: type=1800 audit(1539051610.639:22): pid=5726 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0 [ 37.093998] audit: type=1800 audit(1539051610.639:23): pid=5726 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rsyslog" dev="sda1" ino=2442 res=0 [ 37.123563] audit: type=1800 audit(1539051610.639:24): pid=5726 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 '10.128.0.59' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 55.782114] kasan: CONFIG_KASAN_INLINE enabled [ 55.786771] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 55.794161] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 55.800391] CPU: 1 PID: 5878 Comm: syz-executor251 Not tainted 4.19.0-rc6+ #251 [ 55.807814] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.817158] RIP: 0010:rb_erase+0x306/0x3710 [ 55.821461] 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 [ 55.840346] RSP: 0018:ffff8801d4c1e918 EFLAGS: 00010202 [ 55.845689] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 55.852956] RDX: 1ffff1003a983d2b RSI: ffffffff8afc28a0 RDI: 0000000000000008 [ 55.860206] RBP: ffff8801d4c1f320 R08: dffffc0000000000 R09: fffffbfff12d69f8 [ 55.867526] R10: fffffbfff12d69f8 R11: ffffffff896b4fc3 R12: ffff8801b8f591f0 [ 55.874828] R13: dffffc0000000000 R14: ffff8801d4c1f2f8 R15: ffff8801d4c1f438 [ 55.882087] FS: 0000000000c89880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 55.890294] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.896226] CR2: 0000000020000080 CR3: 00000001d793b000 CR4: 00000000001406e0 [ 55.903483] Call Trace: [ 55.906115] ? rb_insert_color+0x1460/0x1460 [ 55.910514] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 55.915427] ? lock_downgrade+0x900/0x900 [ 55.919563] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 55.925343] ? mark_held_locks+0x130/0x130 [ 55.929563] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 55.934826] ? rcu_bh_qs+0xc0/0xc0 [ 55.938346] ? unwind_dump+0x190/0x190 [ 55.942220] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 55.947737] ? mark_held_locks+0x130/0x130 [ 55.951952] ? mark_page_accessed+0xcb0/0x2040 [ 55.956515] ? activate_page+0x1040/0x1040 [ 55.960729] ? activate_page+0x1040/0x1040 [ 55.964950] ? mark_held_locks+0x130/0x130 [ 55.969168] ? kasan_kmalloc+0xc7/0xe0 [ 55.973041] ? kmem_cache_alloc_trace+0x152/0x750 [ 55.977866] ? ima_add_digest_entry+0xcb/0x6a0 [ 55.982450] ? ima_add_template_entry+0x466/0x7f0 [ 55.987279] ? ima_store_template+0x224/0x310 [ 55.991780] ? pagecache_get_page+0x2d8/0xf00 [ 55.996272] ? find_get_pages_contig+0x15b0/0x15b0 [ 56.001234] ? is_bpf_text_address+0xac/0x170 [ 56.005722] ? lock_downgrade+0x900/0x900 [ 56.009856] ? mark_held_locks+0x130/0x130 [ 56.014077] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 56.019910] ? mark_held_locks+0x130/0x130 [ 56.024143] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 56.029491] ? lock_downgrade+0x900/0x900 [ 56.033637] ? kasan_check_read+0x11/0x20 [ 56.037772] ? do_raw_spin_unlock+0xa7/0x2f0 [ 56.042163] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 56.046728] ? mark_held_locks+0x130/0x130 [ 56.050985] ? _raw_spin_unlock+0x2c/0x50 [ 56.055162] ? ext4_discard_preallocations+0x18a/0x13c0 [ 56.060514] ? trace_hardirqs_on+0xbd/0x310 [ 56.064817] ? ext4_exit_mballoc+0xc0/0xc0 [ 56.069040] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 56.074045] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 56.078797] ? modules_open+0xa0/0xa0 [ 56.082582] ? __es_tree_search.isra.12+0x1ba/0x220 [ 56.087577] ? __es_remove_extent+0x9a3/0xba0 [ 56.092059] ? mark_held_locks+0x130/0x130 [ 56.096313] ? lock_downgrade+0x900/0x900 [ 56.100448] ? ext4_es_scan+0x960/0x960 [ 56.104401] ? lock_release+0x970/0x970 [ 56.108356] ? trace_hardirqs_on+0xbd/0x310 [ 56.112661] ? kasan_check_read+0x11/0x20 [ 56.116789] ? clear_inode+0x114/0x3a0 [ 56.120661] ? do_raw_write_trylock+0x1c0/0x1c0 [ 56.125366] ? kasan_check_write+0x14/0x20 [ 56.129589] ? lock_acquire+0x1ed/0x520 [ 56.133552] ? integrity_inode_free+0x77/0x320 [ 56.138120] ? ext4_es_remove_extent+0x151/0x500 [ 56.142941] ? lock_release+0x970/0x970 [ 56.146913] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 56.152000] ? depot_save_stack+0x292/0x470 [ 56.156308] ? kasan_check_write+0x14/0x20 [ 56.160528] ? do_raw_write_lock+0xbd/0x1b0 [ 56.164833] integrity_inode_free+0x12f/0x320 [ 56.169311] security_inode_free+0x19/0x90 [ 56.173528] __destroy_inode+0x328/0x820 [ 56.177569] ? generic_update_time+0x450/0x450 [ 56.182134] ? evict+0x5d8/0x980 [ 56.185488] ? lock_downgrade+0x900/0x900 [ 56.189620] ? __inode_wait_for_writeback+0x2cf/0x380 [ 56.194801] destroy_inode+0xda/0x200 [ 56.198585] ? __destroy_inode+0x820/0x820 [ 56.202813] ? kasan_check_write+0x14/0x20 [ 56.207031] ? do_raw_spin_lock+0xc1/0x200 [ 56.211249] evict+0x5e0/0x980 [ 56.214424] ? jbd2_journal_stop+0x430/0x15d0 [ 56.218903] ? destroy_inode+0x200/0x200 [ 56.222951] ? do_raw_spin_lock+0xc1/0x200 [ 56.227166] ? iput+0x671/0xa90 [ 56.230431] ? lock_downgrade+0x900/0x900 [ 56.234591] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 56.240169] ? kasan_check_read+0x11/0x20 [ 56.244308] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 56.248872] ? lock_downgrade+0x900/0x900 [ 56.253047] ? ext4_ioctl+0x231b/0x4210 [ 56.257005] iput+0x679/0xa90 [ 56.260095] ? inode_add_lru+0x2a0/0x2a0 [ 56.264139] ? up_write+0x7b/0x220 [ 56.267658] ? up_read+0x110/0x110 [ 56.271176] ? up_read+0x110/0x110 [ 56.274699] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 56.280232] ? check_preemption_disabled+0x48/0x200 [ 56.285253] ext4_ioctl+0x236f/0x4210 [ 56.289042] ? is_bpf_text_address+0xac/0x170 [ 56.293528] ? ext4_ioctl_group_add+0x560/0x560 [ 56.298197] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 56.304009] ? kasan_check_read+0x11/0x20 [ 56.308139] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 56.313400] ? rcu_bh_qs+0xc0/0xc0 [ 56.316927] ? unwind_dump+0x190/0x190 [ 56.320844] ? is_bpf_text_address+0xd3/0x170 [ 56.325327] ? kernel_text_address+0x79/0xf0 [ 56.329717] ? __kernel_text_address+0xd/0x40 [ 56.334197] ? unwind_get_return_address+0x61/0xa0 [ 56.339126] ? __save_stack_trace+0x8d/0xf0 [ 56.343430] ? save_stack+0xa9/0xd0 [ 56.347037] ? save_stack+0x43/0xd0 [ 56.350655] ? __kasan_slab_free+0x102/0x150 [ 56.355046] ? kasan_slab_free+0xe/0x10 [ 56.359003] ? kmem_cache_free+0x83/0x290 [ 56.363129] ? putname+0xf2/0x130 [ 56.366559] ? do_sys_open+0x54d/0x700 [ 56.370428] ? __x64_sys_openat+0x9d/0x100 [ 56.374647] ? do_syscall_64+0x1b9/0x820 [ 56.378701] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 56.384047] ? trace_hardirqs_off+0xb8/0x310 [ 56.388431] ? kasan_check_read+0x11/0x20 [ 56.392557] ? do_raw_spin_unlock+0xa7/0x2f0 [ 56.396950] ? trace_hardirqs_on+0x310/0x310 [ 56.401338] ? kasan_check_write+0x14/0x20 [ 56.405554] ? trace_hardirqs_off+0xb8/0x310 [ 56.409949] ? trace_hardirqs_on+0x310/0x310 [ 56.414338] ? ext4_ioctl_group_add+0x560/0x560 [ 56.418992] do_vfs_ioctl+0x1de/0x1720 [ 56.422990] ? trace_hardirqs_on+0xbd/0x310 [ 56.427306] ? ioctl_preallocate+0x300/0x300 [ 56.431695] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 56.437215] ? __fget_light+0x2e9/0x430 [ 56.441183] ? fget_raw+0x20/0x20 [ 56.444616] ? putname+0xf2/0x130 [ 56.448092] ? kmem_cache_free+0x21a/0x290 [ 56.452308] ? putname+0xf7/0x130 [ 56.455760] ? security_file_ioctl+0x94/0xc0 [ 56.460157] ksys_ioctl+0xa9/0xd0 [ 56.463594] __x64_sys_ioctl+0x73/0xb0 [ 56.467463] do_syscall_64+0x1b9/0x820 [ 56.471333] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 56.476678] ? syscall_return_slowpath+0x5e0/0x5e0 [ 56.481585] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 56.486406] ? trace_hardirqs_on_caller+0x310/0x310 [ 56.491402] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 56.496405] ? prepare_exit_to_usermode+0x291/0x3b0 [ 56.501402] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 56.506231] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 56.511401] RIP: 0033:0x440009 [ 56.514576] 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 [ 56.533465] RSP: 002b:00007ffddb3cdd28 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 56.541164] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 56.548411] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 56.555660] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 56.562911] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 56.570162] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 56.577414] Modules linked in: [ 56.580730] ---[ end trace e390a89ec712d90b ]--- [ 56.585509] RIP: 0010:rb_erase+0x306/0x3710 [ 56.589874] 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 [ 56.608847] RSP: 0018:ffff8801d4c1e918 EFLAGS: 00010202 [ 56.614207] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 56.621589] RDX: 1ffff1003a983d2b RSI: ffffffff8afc28a0 RDI: 0000000000000008 [ 56.628959] RBP: ffff8801d4c1f320 R08: dffffc0000000000 R09: fffffbfff12d69f8 [ 56.636226] R10: fffffbfff12d69f8 R11: ffffffff896b4fc3 R12: ffff8801b8f591f0 [ 56.643523] R13: dffffc0000000000 R14: ffff8801d4c1f2f8 R15: ffff8801d4c1f438 [ 56.650810] FS: 0000000000c89880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 56.659172] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 56.665051] CR2: 0000000020000080 CR3: 00000001d793b000 CR4: 00000000001406e0 [ 56.672339] Kernel panic - not syncing: Fatal exception [ 56.678578] Kernel Offset: disabled [ 56.682214] Rebooting in 86400 seconds..