[ 36.946031] audit: type=1800 audit(1539197682.588:24): pid=5679 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. [ 37.435127] audit: type=1800 audit(1539197683.148:25): pid=5679 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 37.455843] audit: type=1800 audit(1539197683.148:26): pid=5679 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 '10.128.0.64' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 46.286820] kasan: CONFIG_KASAN_INLINE enabled [ 46.291441] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 46.298843] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 46.305077] CPU: 1 PID: 5833 Comm: syz-executor582 Not tainted 4.19.0-rc6+ #254 [ 46.312503] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.321874] RIP: 0010:rb_erase+0x306/0x3710 [ 46.326212] 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 [ 46.345097] RSP: 0018:ffff8801bf81e918 EFLAGS: 00010202 [ 46.350441] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 46.357695] RDX: 1ffff10037f03d2b RSI: ffffffff8afc38a0 RDI: 0000000000000008 [ 46.364946] RBP: ffff8801bf81f320 R08: dffffc0000000000 R09: fffffbfff12d6a70 [ 46.372197] R10: fffffbfff12d6a70 R11: ffffffff896b5383 R12: ffff8801b93681f0 [ 46.379449] R13: dffffc0000000000 R14: ffff8801bf81f2f8 R15: ffff8801bf81f438 [ 46.386702] FS: 000000000217b880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 46.394916] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.400795] CR2: 0000000020000080 CR3: 00000001d7427000 CR4: 00000000001406e0 [ 46.408075] Call Trace: [ 46.410663] ? rb_insert_color+0x1460/0x1460 [ 46.415072] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 46.420007] ? lock_downgrade+0x900/0x900 [ 46.424142] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 46.429938] ? mark_held_locks+0x130/0x130 [ 46.434152] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 46.439414] ? rcu_bh_qs+0xc0/0xc0 [ 46.442951] ? unwind_dump+0x190/0x190 [ 46.446837] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 46.452356] ? mark_held_locks+0x130/0x130 [ 46.456575] ? mark_page_accessed+0xcb0/0x2040 [ 46.461140] ? activate_page+0x1040/0x1040 [ 46.465356] ? activate_page+0x1040/0x1040 [ 46.469576] ? mark_held_locks+0x130/0x130 [ 46.473791] ? kasan_kmalloc+0xc7/0xe0 [ 46.477665] ? kmem_cache_alloc_trace+0x152/0x750 [ 46.482493] ? ima_add_digest_entry+0xcb/0x6a0 [ 46.487083] ? ima_add_template_entry+0x466/0x7f0 [ 46.491944] ? ima_store_template+0x224/0x310 [ 46.496430] ? pagecache_get_page+0x2d8/0xf00 [ 46.500931] ? find_get_pages_contig+0x15b0/0x15b0 [ 46.505876] ? is_bpf_text_address+0xac/0x170 [ 46.510382] ? lock_downgrade+0x900/0x900 [ 46.514540] ? mark_held_locks+0x130/0x130 [ 46.518759] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 46.524541] ? mark_held_locks+0x130/0x130 [ 46.528765] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 46.534114] ? lock_downgrade+0x900/0x900 [ 46.538249] ? kasan_check_read+0x11/0x20 [ 46.542392] ? do_raw_spin_unlock+0xa7/0x2f0 [ 46.546786] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 46.551350] ? mark_held_locks+0x130/0x130 [ 46.555572] ? _raw_spin_unlock+0x2c/0x50 [ 46.559795] ? ext4_discard_preallocations+0x18a/0x13c0 [ 46.565147] ? trace_hardirqs_on+0xbd/0x310 [ 46.569457] ? ext4_exit_mballoc+0xc0/0xc0 [ 46.573678] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 46.578683] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 46.583426] ? modules_open+0xa0/0xa0 [ 46.587215] ? __es_tree_search.isra.12+0x1ba/0x220 [ 46.592216] ? __es_remove_extent+0x9a3/0xba0 [ 46.596697] ? mark_held_locks+0x130/0x130 [ 46.600926] ? lock_downgrade+0x900/0x900 [ 46.605062] ? ext4_es_scan+0x960/0x960 [ 46.609019] ? lock_release+0x970/0x970 [ 46.612974] ? trace_hardirqs_on+0xbd/0x310 [ 46.617278] ? kasan_check_read+0x11/0x20 [ 46.621407] ? clear_inode+0x114/0x3a0 [ 46.625285] ? do_raw_write_trylock+0x1c0/0x1c0 [ 46.629937] ? kasan_check_write+0x14/0x20 [ 46.634154] ? lock_acquire+0x1ed/0x520 [ 46.638287] ? integrity_inode_free+0x77/0x320 [ 46.642871] ? ext4_es_remove_extent+0x151/0x500 [ 46.647612] ? lock_release+0x970/0x970 [ 46.651571] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 46.656656] ? depot_save_stack+0x292/0x470 [ 46.660977] ? kasan_check_write+0x14/0x20 [ 46.665197] ? do_raw_write_lock+0xbd/0x1b0 [ 46.669501] integrity_inode_free+0x12f/0x320 [ 46.674002] security_inode_free+0x19/0x90 [ 46.678222] __destroy_inode+0x328/0x820 [ 46.682269] ? generic_update_time+0x450/0x450 [ 46.686836] ? evict+0x5d8/0x980 [ 46.690186] ? lock_downgrade+0x900/0x900 [ 46.694312] ? __inode_wait_for_writeback+0x2cf/0x380 [ 46.699488] destroy_inode+0xda/0x200 [ 46.703272] ? __destroy_inode+0x820/0x820 [ 46.707488] ? kasan_check_write+0x14/0x20 [ 46.711704] ? do_raw_spin_lock+0xc1/0x200 [ 46.715928] evict+0x5e0/0x980 [ 46.719107] ? jbd2_journal_stop+0x430/0x15d0 [ 46.723584] ? destroy_inode+0x200/0x200 [ 46.727630] ? do_raw_spin_lock+0xc1/0x200 [ 46.731846] ? iput+0x671/0xa90 [ 46.735112] ? lock_downgrade+0x900/0x900 [ 46.739242] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 46.744762] ? kasan_check_read+0x11/0x20 [ 46.748894] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 46.753458] ? lock_downgrade+0x900/0x900 [ 46.757590] ? ext4_ioctl+0x231b/0x4210 [ 46.761549] iput+0x679/0xa90 [ 46.764655] ? inode_add_lru+0x2a0/0x2a0 [ 46.768714] ? up_write+0x7b/0x220 [ 46.772235] ? up_read+0x110/0x110 [ 46.775757] ? up_read+0x110/0x110 [ 46.779289] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.784809] ? check_preemption_disabled+0x48/0x200 [ 46.789809] ext4_ioctl+0x236f/0x4210 [ 46.793596] ? is_bpf_text_address+0xac/0x170 [ 46.798078] ? ext4_ioctl_group_add+0x560/0x560 [ 46.802733] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 46.808517] ? kasan_check_read+0x11/0x20 [ 46.812665] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 46.817931] ? rcu_bh_qs+0xc0/0xc0 [ 46.821476] ? unwind_dump+0x190/0x190 [ 46.825350] ? is_bpf_text_address+0xd3/0x170 [ 46.829844] ? kernel_text_address+0x79/0xf0 [ 46.834237] ? __kernel_text_address+0xd/0x40 [ 46.838715] ? unwind_get_return_address+0x61/0xa0 [ 46.843628] ? __save_stack_trace+0x8d/0xf0 [ 46.847939] ? save_stack+0xa9/0xd0 [ 46.851553] ? save_stack+0x43/0xd0 [ 46.855166] ? __kasan_slab_free+0x102/0x150 [ 46.859563] ? kasan_slab_free+0xe/0x10 [ 46.863534] ? kmem_cache_free+0x83/0x290 [ 46.867682] ? putname+0xf2/0x130 [ 46.871134] ? do_sys_open+0x54d/0x700 [ 46.875003] ? __x64_sys_openat+0x9d/0x100 [ 46.879221] ? do_syscall_64+0x1b9/0x820 [ 46.883263] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.888610] ? trace_hardirqs_off+0xb8/0x310 [ 46.893001] ? kasan_check_read+0x11/0x20 [ 46.897134] ? do_raw_spin_unlock+0xa7/0x2f0 [ 46.901528] ? trace_hardirqs_on+0x310/0x310 [ 46.905925] ? kasan_check_write+0x14/0x20 [ 46.910144] ? trace_hardirqs_off+0xb8/0x310 [ 46.914540] ? trace_hardirqs_on+0x310/0x310 [ 46.918937] ? ext4_ioctl_group_add+0x560/0x560 [ 46.923610] do_vfs_ioctl+0x1de/0x1720 [ 46.927488] ? trace_hardirqs_on+0xbd/0x310 [ 46.931796] ? ioctl_preallocate+0x300/0x300 [ 46.936190] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.941710] ? __fget_light+0x2e9/0x430 [ 46.945670] ? fget_raw+0x20/0x20 [ 46.949105] ? putname+0xf2/0x130 [ 46.952539] ? kmem_cache_free+0x21a/0x290 [ 46.956756] ? putname+0xf7/0x130 [ 46.960197] ? security_file_ioctl+0x94/0xc0 [ 46.964608] ksys_ioctl+0xa9/0xd0 [ 46.968065] __x64_sys_ioctl+0x73/0xb0 [ 46.971984] do_syscall_64+0x1b9/0x820 [ 46.975856] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 46.981205] ? syscall_return_slowpath+0x5e0/0x5e0 [ 46.986143] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.990969] ? trace_hardirqs_on_caller+0x310/0x310 [ 46.995969] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 47.000968] ? prepare_exit_to_usermode+0x291/0x3b0 [ 47.005971] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.010804] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.015979] RIP: 0033:0x440009 [ 47.019157] 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 [ 47.038150] RSP: 002b:00007ffd3710bf18 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 47.045842] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 47.053095] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 47.060351] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 47.067605] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 47.074859] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 47.082112] Modules linked in: [ 47.085397] ---[ end trace 09e87ccd934b7a0b ]--- [ 47.090164] RIP: 0010:rb_erase+0x306/0x3710 [ 47.094467] 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 [ 47.113478] RSP: 0018:ffff8801bf81e918 EFLAGS: 00010202 [ 47.118922] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 47.126284] RDX: 1ffff10037f03d2b RSI: ffffffff8afc38a0 RDI: 0000000000000008 [ 47.133539] RBP: ffff8801bf81f320 R08: dffffc0000000000 R09: fffffbfff12d6a70 [ 47.140839] R10: fffffbfff12d6a70 R11: ffffffff896b5383 R12: ffff8801b93681f0 [ 47.148126] R13: dffffc0000000000 R14: ffff8801bf81f2f8 R15: ffff8801bf81f438 [ 47.155439] FS: 000000000217b880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 47.163667] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.169579] CR2: 0000000020000080 CR3: 00000001d7427000 CR4: 00000000001406e0 [ 47.176872] Kernel panic - not syncing: Fatal exception [ 47.183100] Kernel Offset: disabled [ 47.186725] Rebooting in 86400 seconds..