[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 36.657764] audit: type=1800 audit(1538163044.849:25): pid=5878 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 36.682046] audit: type=1800 audit(1538163044.849:26): pid=5878 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 36.711482] audit: type=1800 audit(1538163044.849:27): pid=5878 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 '10.128.0.59' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 52.656344] kasan: CONFIG_KASAN_INLINE enabled [ 52.661065] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 52.668438] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 52.674816] CPU: 1 PID: 6029 Comm: syz-executor150 Not tainted 4.19.0-rc5-next-20180928+ #84 [ 52.683513] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.693155] RIP: 0010:rb_erase+0x306/0x3710 [ 52.697460] 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 [ 52.716487] RSP: 0018:ffff8801d77f6918 EFLAGS: 00010202 [ 52.721834] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 52.729089] RDX: 1ffff1003aefed2b RSI: ffffffff8afa83c0 RDI: 0000000000000008 [ 52.736451] RBP: ffff8801d77f7320 R08: dffffc0000000000 R09: fffffbfff12d6fb8 [ 52.743700] R10: fffffbfff12d6fb8 R11: ffffffff896b7dc3 R12: ffff8801b92721f0 [ 52.751100] R13: dffffc0000000000 R14: ffff8801d77f72f8 R15: ffff8801d77f7438 [ 52.758350] FS: 000000000130e880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 52.766555] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.772560] CR2: 0000000020000080 CR3: 00000001bcfee000 CR4: 00000000001406e0 [ 52.779818] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 52.787321] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 52.794573] Call Trace: [ 52.797148] ? find_get_entry+0x2f2/0xc40 [ 52.801280] ? rb_insert_color+0x1460/0x1460 [ 52.805665] ? add_to_page_cache_lru+0xdb0/0xdb0 [ 52.810413] ? is_bpf_text_address+0xac/0x170 [ 52.815103] ? lock_downgrade+0x900/0x900 [ 52.819235] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 52.824146] ? mark_held_locks+0x130/0x130 [ 52.828626] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 52.833887] ? rcu_softirq_qs+0x20/0x20 [ 52.837844] ? unwind_dump+0x190/0x190 [ 52.841710] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 52.847234] ? mark_page_accessed+0xcaf/0x2040 [ 52.851797] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 52.857315] ? activate_page+0x1040/0x1040 [ 52.861529] ? mark_held_locks+0x130/0x130 [ 52.865751] ? unwind_get_return_address+0x61/0xa0 [ 52.870660] ? __save_stack_trace+0x8d/0xf0 [ 52.874961] ? pagecache_get_page+0x2d8/0xf00 [ 52.879438] ? process_measurement+0x15c4/0x1bf0 [ 52.884174] ? ima_file_check+0xe5/0x130 [ 52.888217] ? find_get_pages_contig+0x15b0/0x15b0 [ 52.893126] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 52.898292] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 52.903024] ? is_bpf_text_address+0xac/0x170 [ 52.907506] ? lock_downgrade+0x900/0x900 [ 52.911652] ? mark_held_locks+0x130/0x130 [ 52.915864] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 52.920773] ? mark_held_locks+0x130/0x130 [ 52.924998] ? ext4_discard_preallocations+0x9b4/0x13b0 [ 52.930347] ? lock_downgrade+0x900/0x900 [ 52.934478] ? kasan_check_read+0x11/0x20 [ 52.938606] ? do_raw_spin_unlock+0xa7/0x2f0 [ 52.942995] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 52.947583] ? mark_held_locks+0x130/0x130 [ 52.951797] ? _raw_spin_unlock+0x2c/0x50 [ 52.955922] ? ext4_discard_preallocations+0x18a/0x13b0 [ 52.961404] ? __getblk_gfp+0x102/0x1040 [ 52.965449] ? ext4_exit_mballoc+0xc0/0xc0 [ 52.969664] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 52.974672] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 52.979409] ? modules_open+0xa0/0xa0 [ 52.983184] ? __es_tree_search.isra.12+0x1ba/0x220 [ 52.988181] ? __es_remove_extent+0x9a3/0xba0 [ 52.992731] ? mark_held_locks+0x130/0x130 [ 52.997322] ? lock_downgrade+0x900/0x900 [ 53.001467] ? ext4_es_scan+0x950/0x950 [ 53.005555] ? lock_release+0x970/0x970 [ 53.009521] ? trace_hardirqs_on+0xbd/0x310 [ 53.013831] ? kasan_check_read+0x11/0x20 [ 53.017959] ? clear_inode+0x114/0x3a0 [ 53.021838] ? do_raw_write_trylock+0x1c0/0x1c0 [ 53.026540] ? kasan_check_write+0x14/0x20 [ 53.030889] ? lock_acquire+0x1ed/0x520 [ 53.035085] ? integrity_inode_free+0x77/0x320 [ 53.039649] ? ext4_es_remove_extent+0x14c/0x4f0 [ 53.044390] ? lock_release+0x970/0x970 [ 53.048475] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 53.053568] ? depot_save_stack+0x292/0x470 [ 53.057867] ? kasan_check_write+0x14/0x20 [ 53.062087] ? do_raw_write_lock+0xbd/0x1b0 [ 53.066392] integrity_inode_free+0x12f/0x320 [ 53.070865] security_inode_free+0x19/0x90 [ 53.075096] __destroy_inode+0x328/0x820 [ 53.079139] ? generic_update_time+0x450/0x450 [ 53.083705] ? evict+0x5d8/0x980 [ 53.087053] ? lock_downgrade+0x900/0x900 [ 53.091326] ? __inode_wait_for_writeback+0x2cf/0x380 [ 53.096497] destroy_inode+0xda/0x200 [ 53.100283] ? __destroy_inode+0x820/0x820 [ 53.104494] ? kasan_check_write+0x14/0x20 [ 53.108933] ? do_raw_spin_lock+0xc1/0x200 [ 53.113156] evict+0x5e0/0x980 [ 53.116521] ? jbd2_journal_stop+0x430/0x15c0 [ 53.120997] ? destroy_inode+0x200/0x200 [ 53.125039] ? do_raw_spin_lock+0xc1/0x200 [ 53.129252] ? iput+0x66c/0xa90 [ 53.132535] ? lock_downgrade+0x900/0x900 [ 53.136834] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 53.142352] ? kasan_check_read+0x11/0x20 [ 53.146494] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 53.151062] ? lock_downgrade+0x900/0x900 [ 53.155191] ? ext4_ioctl+0x2316/0x4210 [ 53.159150] iput+0x674/0xa90 [ 53.162245] ? inode_add_lru+0x2a0/0x2a0 [ 53.166459] ? up_write+0x7b/0x220 [ 53.169984] ? down_write_nested+0x130/0x130 [ 53.174367] ? down_write_nested+0x130/0x130 [ 53.178883] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.184403] ? check_preemption_disabled+0x48/0x200 [ 53.189405] ext4_ioctl+0x236a/0x4210 [ 53.193185] ? is_bpf_text_address+0xac/0x170 [ 53.197729] ? ext4_ioctl_group_add+0x560/0x560 [ 53.202659] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 53.207577] ? kasan_check_read+0x11/0x20 [ 53.211716] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 53.216980] ? rcu_softirq_qs+0x20/0x20 [ 53.221081] ? unwind_dump+0x190/0x190 [ 53.224976] ? is_bpf_text_address+0xd3/0x170 [ 53.229456] ? kernel_text_address+0x79/0xf0 [ 53.233973] ? __kernel_text_address+0xd/0x40 [ 53.238469] ? unwind_get_return_address+0x61/0xa0 [ 53.243391] ? __save_stack_trace+0x8d/0xf0 [ 53.247698] ? save_stack+0xa9/0xd0 [ 53.251307] ? save_stack+0x43/0xd0 [ 53.254919] ? __kasan_slab_free+0x102/0x150 [ 53.259306] ? kasan_slab_free+0xe/0x10 [ 53.263443] ? kmem_cache_free+0x83/0x290 [ 53.267577] ? putname+0xf2/0x130 [ 53.271079] ? do_sys_open+0x54d/0x700 [ 53.274955] ? __x64_sys_openat+0x9d/0x100 [ 53.279266] ? do_syscall_64+0x1b9/0x820 [ 53.283322] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.288819] ? trace_hardirqs_off+0xb8/0x310 [ 53.293209] ? kasan_check_read+0x11/0x20 [ 53.297342] ? do_raw_spin_unlock+0xa7/0x2f0 [ 53.301733] ? trace_hardirqs_on+0x310/0x310 [ 53.306320] ? kasan_check_write+0x14/0x20 [ 53.310547] ? trace_hardirqs_off+0xb8/0x310 [ 53.315084] ? trace_hardirqs_on+0x310/0x310 [ 53.319478] ? ext4_ioctl_group_add+0x560/0x560 [ 53.324128] do_vfs_ioctl+0x1de/0x1720 [ 53.328096] ? trace_hardirqs_on+0xbd/0x310 [ 53.332415] ? ioctl_preallocate+0x300/0x300 [ 53.336814] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.342335] ? __fget_light+0x2e9/0x430 [ 53.346443] ? fget_raw+0x20/0x20 [ 53.349902] ? putname+0xf2/0x130 [ 53.353586] ? kmem_cache_free+0x21a/0x290 [ 53.357807] ? putname+0xf7/0x130 [ 53.361242] ? security_file_ioctl+0x94/0xc0 [ 53.365731] ksys_ioctl+0xa9/0xd0 [ 53.369162] __x64_sys_ioctl+0x73/0xb0 [ 53.373039] do_syscall_64+0x1b9/0x820 [ 53.377185] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 53.382650] ? syscall_return_slowpath+0x5e0/0x5e0 [ 53.387562] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 53.392382] ? trace_hardirqs_on_caller+0x310/0x310 [ 53.397376] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 53.402535] ? prepare_exit_to_usermode+0x291/0x3b0 [ 53.407537] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 53.412360] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.417524] RIP: 0033:0x440009 [ 53.420824] 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 [ 53.439996] RSP: 002b:00007fff78788e38 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 53.447687] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 53.454938] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 53.462182] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 53.469431] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 53.476675] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 53.484081] Modules linked in: [ 53.487456] ---[ end trace fabf6029af3cd3b6 ]--- [ 53.492211] RIP: 0010:rb_erase+0x306/0x3710 [ 53.496509] 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 [ 53.515564] RSP: 0018:ffff8801d77f6918 EFLAGS: 00010202 [ 53.520934] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 53.528207] RDX: 1ffff1003aefed2b RSI: ffffffff8afa83c0 RDI: 0000000000000008 [ 53.535465] RBP: ffff8801d77f7320 R08: dffffc0000000000 R09: fffffbfff12d6fb8 [ 53.542929] R10: fffffbfff12d6fb8 R11: ffffffff896b7dc3 R12: ffff8801b92721f0 [ 53.550211] R13: dffffc0000000000 R14: ffff8801d77f72f8 R15: ffff8801d77f7438 [ 53.557508] FS: 000000000130e880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 53.565725] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 53.571612] CR2: 0000000020000080 CR3: 00000001bcfee000 CR4: 00000000001406e0 [ 53.579111] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 53.586363] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 53.593663] Kernel panic - not syncing: Fatal exception [ 53.600220] Kernel Offset: disabled [ 53.603835] Rebooting in 86400 seconds..