[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 33.822360] audit: type=1800 audit(1539239528.472:25): pid=5621 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 33.842325] audit: type=1800 audit(1539239528.472:26): pid=5621 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 33.865930] audit: type=1800 audit(1539239528.472:27): pid=5621 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 '10.128.0.84' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 64.805705] kasan: CONFIG_KASAN_INLINE enabled [ 64.810332] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 64.817677] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 64.823890] CPU: 0 PID: 5775 Comm: syz-executor369 Not tainted 4.19.0-rc6+ #254 [ 64.831321] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.840662] RIP: 0010:rb_erase+0x306/0x3710 [ 64.844964] 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 [ 64.863848] RSP: 0018:ffff8801cd92e918 EFLAGS: 00010202 [ 64.869192] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 64.876455] RDX: 1ffff10039b25d2b RSI: ffffffff8afc38a0 RDI: 0000000000000008 [ 64.883714] RBP: ffff8801cd92f320 R08: dffffc0000000000 R09: fffffbfff12d6a70 [ 64.890971] R10: fffffbfff12d6a70 R11: ffffffff896b5383 R12: ffff8801b939b1f0 [ 64.898222] R13: dffffc0000000000 R14: ffff8801cd92f2f8 R15: ffff8801cd92f438 [ 64.905480] FS: 00000000014ae880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 64.913690] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.919557] CR2: 0000000020000080 CR3: 00000001d8006000 CR4: 00000000001406f0 [ 64.926811] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.934159] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.941421] Call Trace: [ 64.943999] ? rb_insert_color+0x1460/0x1460 [ 64.948395] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 64.953310] ? lock_downgrade+0x900/0x900 [ 64.957443] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 64.963223] ? mark_held_locks+0x130/0x130 [ 64.967444] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 64.972701] ? rcu_bh_qs+0xc0/0xc0 [ 64.976223] ? unwind_dump+0x190/0x190 [ 64.980115] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 64.985713] ? mark_held_locks+0x130/0x130 [ 64.989940] ? mark_page_accessed+0xcb0/0x2040 [ 64.994506] ? activate_page+0x1040/0x1040 [ 64.998733] ? activate_page+0x1040/0x1040 [ 65.002968] ? mark_held_locks+0x130/0x130 [ 65.007190] ? kasan_kmalloc+0xc7/0xe0 [ 65.011070] ? kmem_cache_alloc_trace+0x152/0x750 [ 65.015901] ? ima_add_digest_entry+0xcb/0x6a0 [ 65.020466] ? ima_add_template_entry+0x466/0x7f0 [ 65.025289] ? ima_store_template+0x224/0x310 [ 65.029771] ? mark_held_locks+0x130/0x130 [ 65.033989] ? find_get_pages_contig+0x15b0/0x15b0 [ 65.038910] ? mark_held_locks+0x130/0x130 [ 65.043126] ? lock_downgrade+0x900/0x900 [ 65.047257] ? mark_held_locks+0x130/0x130 [ 65.051473] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 65.057251] ? mark_held_locks+0x130/0x130 [ 65.061474] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 65.066821] ? lock_downgrade+0x900/0x900 [ 65.070963] ? kasan_check_read+0x11/0x20 [ 65.075098] ? do_raw_spin_unlock+0xa7/0x2f0 [ 65.079498] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 65.084068] ? mark_held_locks+0x130/0x130 [ 65.088288] ? _raw_spin_unlock+0x2c/0x50 [ 65.092423] ? ext4_discard_preallocations+0x18a/0x13c0 [ 65.097777] ? ext4_exit_mballoc+0xc0/0xc0 [ 65.102007] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 65.107007] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 65.111758] ? modules_open+0xa0/0xa0 [ 65.115546] ? __es_tree_search.isra.12+0x1ba/0x220 [ 65.120577] ? __es_remove_extent+0x9a3/0xba0 [ 65.125064] ? mark_held_locks+0x130/0x130 [ 65.129282] ? lock_downgrade+0x900/0x900 [ 65.133416] ? ext4_es_scan+0x960/0x960 [ 65.137373] ? lock_release+0x970/0x970 [ 65.141328] ? trace_hardirqs_on+0xbd/0x310 [ 65.145632] ? kasan_check_read+0x11/0x20 [ 65.149762] ? clear_inode+0x114/0x3a0 [ 65.153631] ? do_raw_write_trylock+0x1c0/0x1c0 [ 65.158278] ? kasan_check_write+0x14/0x20 [ 65.162496] ? lock_acquire+0x1ed/0x520 [ 65.166453] ? integrity_inode_free+0x77/0x320 [ 65.171014] ? ext4_es_remove_extent+0x151/0x500 [ 65.175752] ? lock_release+0x970/0x970 [ 65.179707] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 65.184884] ? depot_save_stack+0x292/0x470 [ 65.189206] ? kasan_check_write+0x14/0x20 [ 65.193502] ? do_raw_write_lock+0xbd/0x1b0 [ 65.197821] integrity_inode_free+0x12f/0x320 [ 65.202306] security_inode_free+0x19/0x90 [ 65.206542] __destroy_inode+0x328/0x820 [ 65.210678] ? generic_update_time+0x450/0x450 [ 65.215242] ? evict+0x5d8/0x980 [ 65.218592] ? lock_downgrade+0x900/0x900 [ 65.222736] ? __inode_wait_for_writeback+0x2cf/0x380 [ 65.227913] destroy_inode+0xda/0x200 [ 65.231698] ? __destroy_inode+0x820/0x820 [ 65.235918] ? kasan_check_write+0x14/0x20 [ 65.240140] ? do_raw_spin_lock+0xc1/0x200 [ 65.244361] evict+0x5e0/0x980 [ 65.247536] ? jbd2_journal_stop+0x430/0x15d0 [ 65.252014] ? destroy_inode+0x200/0x200 [ 65.256061] ? do_raw_spin_lock+0xc1/0x200 [ 65.260280] ? iput+0x671/0xa90 [ 65.263555] ? lock_downgrade+0x900/0x900 [ 65.267685] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 65.273206] ? kasan_check_read+0x11/0x20 [ 65.277342] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 65.281910] ? lock_downgrade+0x900/0x900 [ 65.286052] ? ext4_ioctl+0x231b/0x4210 [ 65.290014] iput+0x679/0xa90 [ 65.293113] ? inode_add_lru+0x2a0/0x2a0 [ 65.297159] ? up_write+0x7b/0x220 [ 65.300684] ? up_read+0x110/0x110 [ 65.304206] ? up_read+0x110/0x110 [ 65.307727] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 65.313245] ? check_preemption_disabled+0x48/0x200 [ 65.318250] ext4_ioctl+0x236f/0x4210 [ 65.322040] ? is_bpf_text_address+0xac/0x170 [ 65.326520] ? ext4_ioctl_group_add+0x560/0x560 [ 65.331179] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 65.336963] ? kasan_check_read+0x11/0x20 [ 65.341095] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 65.346352] ? rcu_bh_qs+0xc0/0xc0 [ 65.349879] ? unwind_dump+0x190/0x190 [ 65.353750] ? is_bpf_text_address+0xd3/0x170 [ 65.358225] ? kernel_text_address+0x79/0xf0 [ 65.362615] ? __kernel_text_address+0xd/0x40 [ 65.367089] ? unwind_get_return_address+0x61/0xa0 [ 65.372002] ? __save_stack_trace+0x8d/0xf0 [ 65.376308] ? save_stack+0xa9/0xd0 [ 65.379916] ? save_stack+0x43/0xd0 [ 65.383528] ? __kasan_slab_free+0x102/0x150 [ 65.387916] ? kasan_slab_free+0xe/0x10 [ 65.391960] ? kmem_cache_free+0x83/0x290 [ 65.396153] ? putname+0xf2/0x130 [ 65.399601] ? do_sys_open+0x54d/0x700 [ 65.403475] ? __x64_sys_openat+0x9d/0x100 [ 65.407691] ? do_syscall_64+0x1b9/0x820 [ 65.411736] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 65.417088] ? trace_hardirqs_off+0xb8/0x310 [ 65.421482] ? kasan_check_read+0x11/0x20 [ 65.425614] ? do_raw_spin_unlock+0xa7/0x2f0 [ 65.430134] ? trace_hardirqs_on+0x310/0x310 [ 65.434527] ? kasan_check_write+0x14/0x20 [ 65.438748] ? trace_hardirqs_off+0xb8/0x310 [ 65.443143] ? trace_hardirqs_on+0x310/0x310 [ 65.447538] ? ext4_ioctl_group_add+0x560/0x560 [ 65.452190] do_vfs_ioctl+0x1de/0x1720 [ 65.456062] ? trace_hardirqs_on+0xbd/0x310 [ 65.460365] ? ioctl_preallocate+0x300/0x300 [ 65.464761] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 65.470281] ? __fget_light+0x2e9/0x430 [ 65.474237] ? fget_raw+0x20/0x20 [ 65.477684] ? putname+0xf2/0x130 [ 65.481129] ? kmem_cache_free+0x21a/0x290 [ 65.485351] ? putname+0xf7/0x130 [ 65.488806] ? security_file_ioctl+0x94/0xc0 [ 65.493210] ksys_ioctl+0xa9/0xd0 [ 65.496651] __x64_sys_ioctl+0x73/0xb0 [ 65.500531] do_syscall_64+0x1b9/0x820 [ 65.504407] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 65.509760] ? syscall_return_slowpath+0x5e0/0x5e0 [ 65.514676] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 65.519503] ? trace_hardirqs_on_caller+0x310/0x310 [ 65.524503] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 65.529511] ? prepare_exit_to_usermode+0x291/0x3b0 [ 65.534690] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 65.539520] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 65.544687] RIP: 0033:0x440009 [ 65.547897] 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 [ 65.566786] RSP: 002b:00007ffd51892ca8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 65.574479] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 65.581734] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 65.588995] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 65.596249] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 65.603503] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 65.610760] Modules linked in: [ 65.614045] ---[ end trace 2941abe19202a6d5 ]--- [ 65.618815] RIP: 0010:rb_erase+0x306/0x3710 [ 65.623260] 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 [ 65.642194] RSP: 0018:ffff8801cd92e918 EFLAGS: 00010202 [ 65.647556] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 65.654930] RDX: 1ffff10039b25d2b RSI: ffffffff8afc38a0 RDI: 0000000000000008 [ 65.662292] RBP: ffff8801cd92f320 R08: dffffc0000000000 R09: fffffbfff12d6a70 [ 65.669636] R10: fffffbfff12d6a70 R11: ffffffff896b5383 R12: ffff8801b939b1f0 [ 65.676917] R13: dffffc0000000000 R14: ffff8801cd92f2f8 R15: ffff8801cd92f438 [ 65.684204] FS: 00000000014ae880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 65.692439] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 65.698303] CR2: 0000000020000080 CR3: 00000001d8006000 CR4: 00000000001406f0 [ 65.705591] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 65.712877] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 65.720155] Kernel panic - not syncing: Fatal exception [ 65.726637] Kernel Offset: disabled [ 65.730335] Rebooting in 86400 seconds..