[ 35.578276] audit: type=1800 audit(1539134085.249:24): pid=5681 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. [ 35.996848] audit: type=1800 audit(1539134085.749:25): pid=5681 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 36.024211] audit: type=1800 audit(1539134085.749:26): pid=5681 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 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 '10.128.0.72' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 48.251749] kasan: CONFIG_KASAN_INLINE enabled [ 48.256444] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 48.263835] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 48.270054] CPU: 1 PID: 5836 Comm: syz-executor346 Not tainted 4.19.0-rc6+ #253 [ 48.277478] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.286822] RIP: 0010:rb_erase+0x306/0x3710 [ 48.291247] 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 [ 48.310150] RSP: 0018:ffff8801bbce6918 EFLAGS: 00010202 [ 48.315509] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 48.322894] RDX: 1ffff1003779cd2b RSI: ffffffff8afc38a0 RDI: 0000000000000008 [ 48.330159] RBP: ffff8801bbce7320 R08: dffffc0000000000 R09: fffffbfff12d6a70 [ 48.337413] R10: fffffbfff12d6a70 R11: ffffffff896b5383 R12: ffff8801b933d1f0 [ 48.344670] R13: dffffc0000000000 R14: ffff8801bbce72f8 R15: ffff8801bbce7438 [ 48.351930] FS: 00000000024e7880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 48.360142] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.366011] CR2: 0000000020000080 CR3: 00000001d79d7000 CR4: 00000000001406e0 [ 48.373264] Call Trace: [ 48.375843] ? rb_insert_color+0x1460/0x1460 [ 48.380245] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 48.385158] ? lock_downgrade+0x900/0x900 [ 48.389291] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 48.395152] ? mark_held_locks+0x130/0x130 [ 48.399389] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 48.404651] ? rcu_bh_qs+0xc0/0xc0 [ 48.408173] ? unwind_dump+0x190/0x190 [ 48.412044] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 48.417584] ? mark_held_locks+0x130/0x130 [ 48.421811] ? mark_page_accessed+0xcb0/0x2040 [ 48.426374] ? activate_page+0x1040/0x1040 [ 48.430592] ? activate_page+0x1040/0x1040 [ 48.434812] ? mark_held_locks+0x130/0x130 [ 48.439032] ? kasan_kmalloc+0xc7/0xe0 [ 48.442908] ? kmem_cache_alloc_trace+0x152/0x750 [ 48.447736] ? ima_add_digest_entry+0xcb/0x6a0 [ 48.452302] ? ima_add_template_entry+0x466/0x7f0 [ 48.457132] ? ima_store_template+0x224/0x310 [ 48.461617] ? mark_held_locks+0x130/0x130 [ 48.465845] ? find_get_pages_contig+0x15b0/0x15b0 [ 48.470766] ? mark_held_locks+0x130/0x130 [ 48.474985] ? lock_downgrade+0x900/0x900 [ 48.479118] ? mark_held_locks+0x130/0x130 [ 48.483342] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 48.489143] ? mark_held_locks+0x130/0x130 [ 48.493442] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 48.498921] ? lock_downgrade+0x900/0x900 [ 48.503054] ? kasan_check_read+0x11/0x20 [ 48.507194] ? do_raw_spin_unlock+0xa7/0x2f0 [ 48.511645] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 48.516231] ? mark_held_locks+0x130/0x130 [ 48.520475] ? _raw_spin_unlock+0x2c/0x50 [ 48.524607] ? ext4_discard_preallocations+0x18a/0x13c0 [ 48.529963] ? ext4_exit_mballoc+0xc0/0xc0 [ 48.534181] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 48.539195] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 48.543935] ? modules_open+0xa0/0xa0 [ 48.547730] ? __es_tree_search.isra.12+0x1ba/0x220 [ 48.552733] ? __es_remove_extent+0x9a3/0xba0 [ 48.557219] ? mark_held_locks+0x130/0x130 [ 48.561443] ? lock_downgrade+0x900/0x900 [ 48.565575] ? ext4_es_scan+0x960/0x960 [ 48.569535] ? lock_release+0x970/0x970 [ 48.573492] ? trace_hardirqs_on+0xbd/0x310 [ 48.577798] ? kasan_check_read+0x11/0x20 [ 48.581929] ? clear_inode+0x114/0x3a0 [ 48.585800] ? do_raw_write_trylock+0x1c0/0x1c0 [ 48.590452] ? kasan_check_write+0x14/0x20 [ 48.594681] ? lock_acquire+0x1ed/0x520 [ 48.598650] ? integrity_inode_free+0x77/0x320 [ 48.603236] ? ext4_es_remove_extent+0x151/0x500 [ 48.607978] ? lock_release+0x970/0x970 [ 48.611939] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 48.617026] ? depot_save_stack+0x292/0x470 [ 48.621330] ? kasan_check_write+0x14/0x20 [ 48.625544] ? do_raw_write_lock+0xbd/0x1b0 [ 48.629846] integrity_inode_free+0x12f/0x320 [ 48.634325] security_inode_free+0x19/0x90 [ 48.638542] __destroy_inode+0x328/0x820 [ 48.642768] ? generic_update_time+0x450/0x450 [ 48.647335] ? evict+0x5d8/0x980 [ 48.650693] ? lock_downgrade+0x900/0x900 [ 48.654844] ? __inode_wait_for_writeback+0x2cf/0x380 [ 48.660070] destroy_inode+0xda/0x200 [ 48.663861] ? __destroy_inode+0x820/0x820 [ 48.668082] ? kasan_check_write+0x14/0x20 [ 48.672302] ? do_raw_spin_lock+0xc1/0x200 [ 48.676518] evict+0x5e0/0x980 [ 48.679695] ? jbd2_journal_stop+0x430/0x15d0 [ 48.684229] ? destroy_inode+0x200/0x200 [ 48.688282] ? do_raw_spin_lock+0xc1/0x200 [ 48.692498] ? iput+0x671/0xa90 [ 48.695830] ? lock_downgrade+0x900/0x900 [ 48.699973] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 48.705497] ? kasan_check_read+0x11/0x20 [ 48.709638] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 48.714203] ? lock_downgrade+0x900/0x900 [ 48.718337] ? ext4_ioctl+0x231b/0x4210 [ 48.722295] iput+0x679/0xa90 [ 48.725386] ? inode_add_lru+0x2a0/0x2a0 [ 48.729429] ? up_write+0x7b/0x220 [ 48.733015] ? up_read+0x110/0x110 [ 48.736541] ? up_read+0x110/0x110 [ 48.740067] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.745594] ? check_preemption_disabled+0x48/0x200 [ 48.750683] ext4_ioctl+0x236f/0x4210 [ 48.754475] ? is_bpf_text_address+0xac/0x170 [ 48.758955] ? ext4_ioctl_group_add+0x560/0x560 [ 48.763606] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 48.769392] ? kasan_check_read+0x11/0x20 [ 48.773524] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 48.778782] ? rcu_bh_qs+0xc0/0xc0 [ 48.782301] ? unwind_dump+0x190/0x190 [ 48.786173] ? is_bpf_text_address+0xd3/0x170 [ 48.790674] ? kernel_text_address+0x79/0xf0 [ 48.795063] ? __kernel_text_address+0xd/0x40 [ 48.799541] ? unwind_get_return_address+0x61/0xa0 [ 48.804453] ? __save_stack_trace+0x8d/0xf0 [ 48.808832] ? save_stack+0xa9/0xd0 [ 48.812511] ? save_stack+0x43/0xd0 [ 48.816129] ? __kasan_slab_free+0x102/0x150 [ 48.820522] ? kasan_slab_free+0xe/0x10 [ 48.824533] ? kmem_cache_free+0x83/0x290 [ 48.828717] ? putname+0xf2/0x130 [ 48.832174] ? do_sys_open+0x54d/0x700 [ 48.836048] ? __x64_sys_openat+0x9d/0x100 [ 48.840388] ? do_syscall_64+0x1b9/0x820 [ 48.844433] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.849789] ? trace_hardirqs_off+0xb8/0x310 [ 48.854186] ? kasan_check_read+0x11/0x20 [ 48.858318] ? do_raw_spin_unlock+0xa7/0x2f0 [ 48.862712] ? trace_hardirqs_on+0x310/0x310 [ 48.867107] ? kasan_check_write+0x14/0x20 [ 48.871331] ? trace_hardirqs_off+0xb8/0x310 [ 48.875728] ? trace_hardirqs_on+0x310/0x310 [ 48.880125] ? ext4_ioctl_group_add+0x560/0x560 [ 48.884780] do_vfs_ioctl+0x1de/0x1720 [ 48.888658] ? trace_hardirqs_on+0xbd/0x310 [ 48.892968] ? ioctl_preallocate+0x300/0x300 [ 48.897370] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.902896] ? __fget_light+0x2e9/0x430 [ 48.906879] ? fget_raw+0x20/0x20 [ 48.910365] ? putname+0xf2/0x130 [ 48.913814] ? kmem_cache_free+0x21a/0x290 [ 48.918033] ? putname+0xf7/0x130 [ 48.921475] ? security_file_ioctl+0x94/0xc0 [ 48.925867] ksys_ioctl+0xa9/0xd0 [ 48.929315] __x64_sys_ioctl+0x73/0xb0 [ 48.933189] do_syscall_64+0x1b9/0x820 [ 48.937066] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 48.942420] ? syscall_return_slowpath+0x5e0/0x5e0 [ 48.947385] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.952272] ? trace_hardirqs_on_caller+0x310/0x310 [ 48.957276] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 48.962279] ? prepare_exit_to_usermode+0x291/0x3b0 [ 48.967282] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.972109] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.977279] RIP: 0033:0x440089 [ 48.980456] 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 [ 48.999372] RSP: 002b:00007ffff444eaa8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 49.007059] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 49.014307] RDX: 0000000000440089 RSI: 0000000000006611 RDI: 0000000000000003 [ 49.021558] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 49.028808] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401910 [ 49.036060] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 49.043315] Modules linked in: [ 49.046642] ---[ end trace a00b720d6168c06d ]--- [ 49.051429] RIP: 0010:rb_erase+0x306/0x3710 [ 49.055739] 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 [ 49.074664] RSP: 0018:ffff8801bbce6918 EFLAGS: 00010202 [ 49.080052] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 49.087304] RDX: 1ffff1003779cd2b RSI: ffffffff8afc38a0 RDI: 0000000000000008 [ 49.094679] RBP: ffff8801bbce7320 R08: dffffc0000000000 R09: fffffbfff12d6a70 [ 49.101978] R10: fffffbfff12d6a70 R11: ffffffff896b5383 R12: ffff8801b933d1f0 [ 49.109265] R13: dffffc0000000000 R14: ffff8801bbce72f8 R15: ffff8801bbce7438 [ 49.116541] FS: 00000000024e7880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 49.124801] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.130690] CR2: 0000000020000080 CR3: 00000001d79d7000 CR4: 00000000001406e0 [ 49.138037] Kernel panic - not syncing: Fatal exception [ 49.144265] Kernel Offset: disabled [ 49.147888] Rebooting in 86400 seconds..