[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 35.206305] audit: type=1800 audit(1539228913.906:25): pid=5649 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 35.231126] audit: type=1800 audit(1539228913.906:26): pid=5649 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 35.251973] audit: type=1800 audit(1539228913.906:27): pid=5649 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 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 '10.128.10.32' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 44.904927] kasan: CONFIG_KASAN_INLINE enabled [ 44.909510] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 44.916904] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 44.923143] CPU: 0 PID: 5802 Comm: syz-executor615 Not tainted 4.19.0-rc6+ #136 [ 44.930566] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.939911] RIP: 0010:rb_erase+0x306/0x3710 [ 44.944217] 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 [ 44.963101] RSP: 0018:ffff8801bbd16918 EFLAGS: 00010202 [ 44.968447] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 44.975697] RDX: 1ffff100377a2d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 44.982944] RBP: ffff8801bbd17320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 44.990208] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b92131f0 [ 44.997457] R13: dffffc0000000000 R14: ffff8801bbd172f8 R15: ffff8801bbd17438 [ 45.004708] FS: 0000000002644880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 45.012922] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.018782] CR2: 0000000020000040 CR3: 00000001d8208000 CR4: 00000000001406f0 [ 45.026033] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.033282] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.040530] Call Trace: [ 45.043102] ? rb_insert_color+0x1460/0x1460 [ 45.047497] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 45.052236] ? lock_downgrade+0x900/0x900 [ 45.056371] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 45.062153] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 45.067670] ? mark_page_accessed+0xcb0/0x2040 [ 45.072234] ? activate_page+0x1040/0x1040 [ 45.076453] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 45.081969] ? mark_held_locks+0x130/0x130 [ 45.086187] ? mark_page_accessed+0xcb0/0x2040 [ 45.090746] ? activate_page+0x1040/0x1040 [ 45.094961] ? activate_page+0x1040/0x1040 [ 45.099195] ? mark_held_locks+0x130/0x130 [ 45.103410] ? kasan_kmalloc+0xc7/0xe0 [ 45.107283] ? kmem_cache_alloc_trace+0x152/0x750 [ 45.112104] ? ima_add_digest_entry+0xcb/0x6a0 [ 45.116667] ? ima_add_template_entry+0x466/0x7f0 [ 45.121491] ? ima_store_template+0x224/0x310 [ 45.125967] ? ima_store_measurement+0x321/0x630 [ 45.130702] ? process_measurement+0x15c4/0x1bf0 [ 45.135437] ? ima_file_check+0xe5/0x130 [ 45.139478] ? path_openat+0x134d/0x5160 [ 45.143516] ? do_filp_open+0x255/0x380 [ 45.147469] ? do_sys_open+0x568/0x700 [ 45.151341] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 45.156338] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 45.161077] ? is_bpf_text_address+0xac/0x170 [ 45.165556] ? lock_downgrade+0x900/0x900 [ 45.169701] ? mark_held_locks+0x130/0x130 [ 45.173923] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 45.179702] ? mark_held_locks+0x130/0x130 [ 45.183922] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 45.189269] ? lock_downgrade+0x900/0x900 [ 45.193397] ? kasan_check_read+0x11/0x20 [ 45.197532] ? do_raw_spin_unlock+0xa7/0x2f0 [ 45.201921] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 45.206484] ? mark_held_locks+0x130/0x130 [ 45.210701] ? _raw_spin_unlock+0x2c/0x50 [ 45.214831] ? ext4_discard_preallocations+0x18a/0x13c0 [ 45.220180] ? trace_hardirqs_on+0xbd/0x310 [ 45.224486] ? ext4_exit_mballoc+0xc0/0xc0 [ 45.228717] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 45.233713] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 45.238452] ? modules_open+0xa0/0xa0 [ 45.242233] ? __es_tree_search.isra.12+0x1ba/0x220 [ 45.247232] ? __es_remove_extent+0x9a3/0xba0 [ 45.251723] ? mark_held_locks+0x130/0x130 [ 45.255945] ? lock_downgrade+0x900/0x900 [ 45.260085] ? ext4_es_scan+0x960/0x960 [ 45.264039] ? lock_release+0x970/0x970 [ 45.267998] ? trace_hardirqs_on+0xbd/0x310 [ 45.272301] ? kasan_check_read+0x11/0x20 [ 45.276451] ? clear_inode+0x114/0x3a0 [ 45.280319] ? do_raw_write_trylock+0x1c0/0x1c0 [ 45.284971] ? kasan_check_write+0x14/0x20 [ 45.289186] ? lock_acquire+0x1ed/0x520 [ 45.293138] ? integrity_inode_free+0x77/0x320 [ 45.297703] ? ext4_es_remove_extent+0x151/0x500 [ 45.302439] ? lock_release+0x970/0x970 [ 45.306413] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 45.311496] ? depot_save_stack+0x292/0x470 [ 45.315803] ? kasan_check_write+0x14/0x20 [ 45.320022] ? do_raw_write_lock+0xbd/0x1b0 [ 45.324326] integrity_inode_free+0x12f/0x320 [ 45.328804] security_inode_free+0x19/0x90 [ 45.333018] __destroy_inode+0x328/0x820 [ 45.337064] ? generic_update_time+0x450/0x450 [ 45.341643] ? evict+0x5d8/0x980 [ 45.344992] ? lock_downgrade+0x900/0x900 [ 45.349124] ? __inode_wait_for_writeback+0x2cf/0x380 [ 45.354315] destroy_inode+0xda/0x200 [ 45.358097] ? __destroy_inode+0x820/0x820 [ 45.362309] ? kasan_check_write+0x14/0x20 [ 45.366526] ? do_raw_spin_lock+0xc1/0x200 [ 45.370741] evict+0x5e0/0x980 [ 45.373915] ? jbd2_journal_stop+0x430/0x15d0 [ 45.378394] ? destroy_inode+0x200/0x200 [ 45.382439] ? do_raw_spin_lock+0xc1/0x200 [ 45.386657] ? iput+0x671/0xa90 [ 45.389922] ? lock_downgrade+0x900/0x900 [ 45.394049] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 45.399570] ? kasan_check_read+0x11/0x20 [ 45.403699] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 45.408261] ? lock_downgrade+0x900/0x900 [ 45.412391] ? ext4_ioctl+0x231b/0x4210 [ 45.416350] iput+0x679/0xa90 [ 45.419436] ? inode_add_lru+0x2a0/0x2a0 [ 45.423476] ? up_write+0x7b/0x220 [ 45.426997] ? up_read+0x110/0x110 [ 45.430513] ? up_read+0x110/0x110 [ 45.434040] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.439577] ? check_preemption_disabled+0x48/0x200 [ 45.444577] ext4_ioctl+0x236f/0x4210 [ 45.448360] ? is_bpf_text_address+0xac/0x170 [ 45.452836] ? ext4_ioctl_group_add+0x560/0x560 [ 45.457488] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 45.463279] ? kasan_check_read+0x11/0x20 [ 45.467411] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 45.472671] ? rcu_bh_qs+0xc0/0xc0 [ 45.476191] ? unwind_dump+0x190/0x190 [ 45.480063] ? is_bpf_text_address+0xd3/0x170 [ 45.484540] ? kernel_text_address+0x79/0xf0 [ 45.488929] ? __kernel_text_address+0xd/0x40 [ 45.493426] ? unwind_get_return_address+0x61/0xa0 [ 45.498343] ? __save_stack_trace+0x8d/0xf0 [ 45.502647] ? save_stack+0xa9/0xd0 [ 45.506253] ? save_stack+0x43/0xd0 [ 45.509861] ? __kasan_slab_free+0x102/0x150 [ 45.514271] ? kasan_slab_free+0xe/0x10 [ 45.518227] ? kmem_cache_free+0x83/0x290 [ 45.522352] ? putname+0xf2/0x130 [ 45.525786] ? do_sys_open+0x54d/0x700 [ 45.529653] ? __x64_sys_openat+0x9d/0x100 [ 45.533869] ? do_syscall_64+0x1b9/0x820 [ 45.537920] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.543287] ? trace_hardirqs_off+0xb8/0x310 [ 45.547678] ? kasan_check_read+0x11/0x20 [ 45.551808] ? do_raw_spin_unlock+0xa7/0x2f0 [ 45.556197] ? trace_hardirqs_on+0x310/0x310 [ 45.560586] ? kasan_check_write+0x14/0x20 [ 45.564800] ? trace_hardirqs_off+0xb8/0x310 [ 45.569191] ? trace_hardirqs_on+0x310/0x310 [ 45.573581] ? ext4_ioctl_group_add+0x560/0x560 [ 45.578232] do_vfs_ioctl+0x1de/0x1720 [ 45.582098] ? trace_hardirqs_on+0xbd/0x310 [ 45.586407] ? ioctl_preallocate+0x300/0x300 [ 45.590805] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.596328] ? __fget_light+0x2e9/0x430 [ 45.600286] ? fget_raw+0x20/0x20 [ 45.603716] ? putname+0xf2/0x130 [ 45.607171] ? kmem_cache_free+0x21a/0x290 [ 45.611386] ? putname+0xf7/0x130 [ 45.614827] ? security_file_ioctl+0x94/0xc0 [ 45.619220] ksys_ioctl+0xa9/0xd0 [ 45.622657] __x64_sys_ioctl+0x73/0xb0 [ 45.626527] do_syscall_64+0x1b9/0x820 [ 45.630394] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 45.635743] ? syscall_return_slowpath+0x5e0/0x5e0 [ 45.640650] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.645474] ? trace_hardirqs_on_caller+0x310/0x310 [ 45.650470] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 45.655465] ? prepare_exit_to_usermode+0x291/0x3b0 [ 45.660466] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.665292] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.670461] RIP: 0033:0x440029 [ 45.673634] 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 [ 45.692516] RSP: 002b:00007ffc34b6d2b8 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 45.700205] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440029 [ 45.707459] RDX: 0000000000440029 RSI: 0000000000006611 RDI: 0000000000000004 [ 45.714706] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 45.722160] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004018b0 [ 45.729423] R13: 0000000000401940 R14: 0000000000000000 R15: 0000000000000000 [ 45.736677] Modules linked in: [ 45.740024] ---[ end trace baf218e49abb0088 ]--- [ 45.744824] RIP: 0010:rb_erase+0x306/0x3710 [ 45.749145] 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 [ 45.768082] RSP: 0018:ffff8801bbd16918 EFLAGS: 00010202 [ 45.773460] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 45.780740] RDX: 1ffff100377a2d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 45.788021] RBP: ffff8801bbd17320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 45.795305] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b92131f0 [ 45.802578] R13: dffffc0000000000 R14: ffff8801bbd172f8 R15: ffff8801bbd17438 [ 45.809863] FS: 0000000002644880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 45.818142] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.824004] CR2: 0000000020000040 CR3: 00000001d8208000 CR4: 00000000001406f0 [ 45.831287] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.838571] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.846049] Kernel panic - not syncing: Fatal exception [ 45.852327] Kernel Offset: disabled [ 45.855950] Rebooting in 86400 seconds..