[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 36.776722] audit: type=1800 audit(1539303624.254:25): pid=5658 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 36.804255] audit: type=1800 audit(1539303624.264:26): pid=5658 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 36.831284] audit: type=1800 audit(1539303624.264:27): pid=5658 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 '10.128.10.35' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 45.031820] kasan: CONFIG_KASAN_INLINE enabled [ 45.036415] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 45.043924] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 45.050161] CPU: 1 PID: 5810 Comm: syz-executor187 Not tainted 4.19.0-rc7+ #279 [ 45.057616] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.066991] RIP: 0010:rb_erase+0x306/0x3710 [ 45.071298] 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 [ 45.090184] RSP: 0018:ffff8801c1896918 EFLAGS: 00010202 [ 45.095535] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 45.102792] RDX: 1ffff10038312d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 45.110057] RBP: ffff8801c1897320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 45.117310] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801b93461f0 [ 45.124561] R13: dffffc0000000000 R14: ffff8801c18972f8 R15: ffff8801c1897438 [ 45.131814] FS: 0000000000864880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 45.140039] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.145919] CR2: 0000000020000080 CR3: 00000001d81fe000 CR4: 00000000001406e0 [ 45.153203] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.160462] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.167716] Call Trace: [ 45.170317] ? rb_insert_color+0x1460/0x1460 [ 45.174717] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 45.179635] ? lock_downgrade+0x900/0x900 [ 45.183790] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 45.189577] ? mark_held_locks+0x130/0x130 [ 45.193799] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 45.199062] ? rcu_bh_qs+0xc0/0xc0 [ 45.202584] ? unwind_dump+0x190/0x190 [ 45.206461] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 45.212609] ? mark_held_locks+0x130/0x130 [ 45.216826] ? mark_page_accessed+0xcb0/0x2040 [ 45.221390] ? activate_page+0x1040/0x1040 [ 45.225606] ? activate_page+0x1040/0x1040 [ 45.229830] ? mark_held_locks+0x130/0x130 [ 45.234049] ? kasan_kmalloc+0xc7/0xe0 [ 45.237943] ? kmem_cache_alloc_trace+0x152/0x750 [ 45.242777] ? ima_add_digest_entry+0xcb/0x6a0 [ 45.247341] ? ima_add_template_entry+0x466/0x7f0 [ 45.252170] ? ima_store_template+0x224/0x310 [ 45.256655] ? pagecache_get_page+0x2d8/0xf00 [ 45.261135] ? find_get_pages_contig+0x15b0/0x15b0 [ 45.266143] ? is_bpf_text_address+0xac/0x170 [ 45.270630] ? lock_downgrade+0x900/0x900 [ 45.274763] ? mark_held_locks+0x130/0x130 [ 45.279074] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 45.284871] ? mark_held_locks+0x130/0x130 [ 45.289092] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 45.294437] ? lock_downgrade+0x900/0x900 [ 45.298588] ? kasan_check_read+0x11/0x20 [ 45.302722] ? do_raw_spin_unlock+0xa7/0x2f0 [ 45.307113] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 45.311678] ? mark_held_locks+0x130/0x130 [ 45.315893] ? _raw_spin_unlock+0x2c/0x50 [ 45.320027] ? ext4_discard_preallocations+0x18a/0x13c0 [ 45.325377] ? trace_hardirqs_on+0xbd/0x310 [ 45.329710] ? ext4_exit_mballoc+0xc0/0xc0 [ 45.333932] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 45.338956] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 45.343704] ? modules_open+0xa0/0xa0 [ 45.347509] ? __es_tree_search.isra.12+0x1ba/0x220 [ 45.352528] ? __es_remove_extent+0x9a3/0xba0 [ 45.357020] ? mark_held_locks+0x130/0x130 [ 45.361280] ? lock_downgrade+0x900/0x900 [ 45.365447] ? ext4_es_scan+0x960/0x960 [ 45.369409] ? lock_release+0x970/0x970 [ 45.373368] ? trace_hardirqs_on+0xbd/0x310 [ 45.377679] ? kasan_check_read+0x11/0x20 [ 45.381824] ? clear_inode+0x114/0x3a0 [ 45.385696] ? do_raw_write_trylock+0x1c0/0x1c0 [ 45.390351] ? kasan_check_write+0x14/0x20 [ 45.394571] ? lock_acquire+0x1ed/0x520 [ 45.398531] ? integrity_inode_free+0x77/0x320 [ 45.403140] ? ext4_es_remove_extent+0x151/0x500 [ 45.407894] ? lock_release+0x970/0x970 [ 45.411860] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 45.416970] ? depot_save_stack+0x292/0x470 [ 45.421294] ? kasan_check_write+0x14/0x20 [ 45.425527] ? do_raw_write_lock+0xbd/0x1b0 [ 45.429856] integrity_inode_free+0x12f/0x320 [ 45.434346] security_inode_free+0x19/0x90 [ 45.438573] __destroy_inode+0x328/0x820 [ 45.442621] ? generic_update_time+0x450/0x450 [ 45.447192] ? evict+0x5d8/0x980 [ 45.450546] ? lock_downgrade+0x900/0x900 [ 45.454683] ? __inode_wait_for_writeback+0x2cf/0x380 [ 45.459870] destroy_inode+0xda/0x200 [ 45.463660] ? __destroy_inode+0x820/0x820 [ 45.467904] ? kasan_check_write+0x14/0x20 [ 45.472129] ? do_raw_spin_lock+0xc1/0x200 [ 45.476351] evict+0x5e0/0x980 [ 45.479531] ? jbd2_journal_stop+0x430/0x15d0 [ 45.484026] ? destroy_inode+0x200/0x200 [ 45.488081] ? do_raw_spin_lock+0xc1/0x200 [ 45.492310] ? iput+0x671/0xa90 [ 45.495596] ? lock_downgrade+0x900/0x900 [ 45.499741] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 45.505278] ? kasan_check_read+0x11/0x20 [ 45.509420] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 45.513997] ? lock_downgrade+0x900/0x900 [ 45.518135] ? ext4_ioctl+0x231b/0x4210 [ 45.522113] iput+0x679/0xa90 [ 45.525202] ? inode_add_lru+0x2a0/0x2a0 [ 45.529259] ? up_write+0x7b/0x220 [ 45.532794] ? up_read+0x110/0x110 [ 45.536317] ? up_read+0x110/0x110 [ 45.539846] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.545376] ? check_preemption_disabled+0x48/0x200 [ 45.550387] ext4_ioctl+0x236f/0x4210 [ 45.554176] ? is_bpf_text_address+0xac/0x170 [ 45.558659] ? ext4_ioctl_group_add+0x560/0x560 [ 45.563333] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 45.569122] ? kasan_check_read+0x11/0x20 [ 45.573263] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 45.578553] ? rcu_bh_qs+0xc0/0xc0 [ 45.582082] ? unwind_dump+0x190/0x190 [ 45.585973] ? is_bpf_text_address+0xd3/0x170 [ 45.590456] ? kernel_text_address+0x79/0xf0 [ 45.594873] ? __kernel_text_address+0xd/0x40 [ 45.599355] ? unwind_get_return_address+0x61/0xa0 [ 45.604278] ? __save_stack_trace+0x8d/0xf0 [ 45.608587] ? save_stack+0xa9/0xd0 [ 45.612202] ? save_stack+0x43/0xd0 [ 45.615831] ? __kasan_slab_free+0x102/0x150 [ 45.620226] ? kasan_slab_free+0xe/0x10 [ 45.624193] ? kmem_cache_free+0x83/0x290 [ 45.628330] ? putname+0xf2/0x130 [ 45.631766] ? do_sys_open+0x54d/0x700 [ 45.635656] ? __x64_sys_openat+0x9d/0x100 [ 45.639881] ? do_syscall_64+0x1b9/0x820 [ 45.643927] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.649287] ? trace_hardirqs_off+0xb8/0x310 [ 45.653701] ? kasan_check_read+0x11/0x20 [ 45.657871] ? do_raw_spin_unlock+0xa7/0x2f0 [ 45.662275] ? trace_hardirqs_on+0x310/0x310 [ 45.666672] ? kasan_check_write+0x14/0x20 [ 45.671013] ? trace_hardirqs_off+0xb8/0x310 [ 45.675415] ? trace_hardirqs_on+0x310/0x310 [ 45.679814] ? ext4_ioctl_group_add+0x560/0x560 [ 45.684476] do_vfs_ioctl+0x1de/0x1720 [ 45.688361] ? trace_hardirqs_on+0xbd/0x310 [ 45.692702] ? ioctl_preallocate+0x300/0x300 [ 45.697106] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.702637] ? __fget_light+0x2e9/0x430 [ 45.706597] ? fget_raw+0x20/0x20 [ 45.710035] ? putname+0xf2/0x130 [ 45.713475] ? kmem_cache_free+0x21a/0x290 [ 45.717702] ? putname+0xf7/0x130 [ 45.721171] ? security_file_ioctl+0x94/0xc0 [ 45.725567] ksys_ioctl+0xa9/0xd0 [ 45.729022] __x64_sys_ioctl+0x73/0xb0 [ 45.732899] do_syscall_64+0x1b9/0x820 [ 45.736771] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 45.742126] ? syscall_return_slowpath+0x5e0/0x5e0 [ 45.747038] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.751883] ? trace_hardirqs_on_caller+0x310/0x310 [ 45.756904] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 45.761933] ? prepare_exit_to_usermode+0x291/0x3b0 [ 45.766944] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.771785] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.776965] RIP: 0033:0x440009 [ 45.780160] 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 [ 45.799052] RSP: 002b:00007ffcfcc37c38 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 45.806764] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 45.814024] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 45.821305] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 45.828585] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 45.835847] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 45.843106] Modules linked in: [ 45.846471] ---[ end trace f5bcb19464f8e836 ]--- [ 45.851276] RIP: 0010:rb_erase+0x306/0x3710 [ 45.855588] 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 [ 45.874541] RSP: 0018:ffff8801c1896918 EFLAGS: 00010202 [ 45.879924] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 45.887203] RDX: 1ffff10038312d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 45.894546] RBP: ffff8801c1897320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 45.901869] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801b93461f0 [ 45.909165] R13: dffffc0000000000 R14: ffff8801c18972f8 R15: ffff8801c1897438 [ 45.916441] FS: 0000000000864880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 45.924710] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.930612] CR2: 0000000020000080 CR3: 00000001d81fe000 CR4: 00000000001406e0 [ 45.937916] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.945210] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.952530] Kernel panic - not syncing: Fatal exception [ 45.958858] Kernel Offset: disabled [ 45.962484] Rebooting in 86400 seconds..