[ 35.664150] audit: type=1800 audit(1539266835.479:22): pid=5690 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0 [ 35.691732] audit: type=1800 audit(1539266835.479:23): pid=5690 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rsyslog" dev="sda1" ino=2442 res=0 [ 35.715540] audit: type=1800 audit(1539266835.479:24): pid=5690 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. [....] 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 '10.128.0.125' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.638364] kasan: CONFIG_KASAN_INLINE enabled [ 43.643019] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 43.650405] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 43.656641] CPU: 1 PID: 5842 Comm: syz-executor486 Not tainted 4.19.0-rc7+ #278 [ 43.664086] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.673432] RIP: 0010:rb_erase+0x306/0x3710 [ 43.677739] 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 [ 43.696624] RSP: 0018:ffff8801d7e46918 EFLAGS: 00010202 [ 43.701970] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 43.709234] RDX: 1ffff1003afc8d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 43.716485] RBP: ffff8801d7e47320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 43.723741] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b934d1f0 [ 43.730993] R13: dffffc0000000000 R14: ffff8801d7e472f8 R15: ffff8801d7e47438 [ 43.738245] FS: 0000000000bbf880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 43.746454] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.752317] CR2: 0000000020000040 CR3: 00000001bc0fd000 CR4: 00000000001406e0 [ 43.759572] Call Trace: [ 43.762164] ? rb_insert_color+0x1460/0x1460 [ 43.766560] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 43.771302] ? is_bpf_text_address+0xac/0x170 [ 43.775779] ? lock_downgrade+0x900/0x900 [ 43.779917] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 43.785722] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 43.791247] ? mark_page_accessed+0xcb0/0x2040 [ 43.795813] ? activate_page+0x1040/0x1040 [ 43.800048] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 43.805572] ? mark_held_locks+0x130/0x130 [ 43.809790] ? mark_page_accessed+0xcb0/0x2040 [ 43.814394] ? activate_page+0x1040/0x1040 [ 43.818612] ? activate_page+0x1040/0x1040 [ 43.822834] ? mark_held_locks+0x130/0x130 [ 43.827049] ? kasan_kmalloc+0xc7/0xe0 [ 43.830920] ? kmem_cache_alloc_trace+0x152/0x750 [ 43.835760] ? ima_add_digest_entry+0xcb/0x6a0 [ 43.840324] ? ima_add_template_entry+0x466/0x7f0 [ 43.845147] ? ima_store_template+0x224/0x310 [ 43.849626] ? ima_store_measurement+0x321/0x630 [ 43.854365] ? process_measurement+0x15c4/0x1bf0 [ 43.859100] ? ima_file_check+0xe5/0x130 [ 43.863142] ? path_openat+0x134d/0x5160 [ 43.867184] ? do_filp_open+0x255/0x380 [ 43.871157] ? do_sys_open+0x568/0x700 [ 43.875038] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 43.880037] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 43.884780] ? is_bpf_text_address+0xac/0x170 [ 43.889260] ? lock_downgrade+0x900/0x900 [ 43.893392] ? mark_held_locks+0x130/0x130 [ 43.897609] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 43.903391] ? mark_held_locks+0x130/0x130 [ 43.907612] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 43.912958] ? lock_downgrade+0x900/0x900 [ 43.917087] ? kasan_check_read+0x11/0x20 [ 43.921225] ? do_raw_spin_unlock+0xa7/0x2f0 [ 43.925615] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 43.930183] ? mark_held_locks+0x130/0x130 [ 43.934414] ? _raw_spin_unlock+0x2c/0x50 [ 43.938581] ? ext4_discard_preallocations+0x18a/0x13c0 [ 43.943930] ? trace_hardirqs_on+0xbd/0x310 [ 43.948239] ? ext4_exit_mballoc+0xc0/0xc0 [ 43.952456] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 43.957456] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 43.962196] ? modules_open+0xa0/0xa0 [ 43.965983] ? __es_tree_search.isra.12+0x1ba/0x220 [ 43.970990] ? __es_remove_extent+0x9a3/0xba0 [ 43.975472] ? mark_held_locks+0x130/0x130 [ 43.979691] ? lock_downgrade+0x900/0x900 [ 43.983835] ? ext4_es_scan+0x960/0x960 [ 43.987808] ? lock_release+0x970/0x970 [ 43.991771] ? trace_hardirqs_on+0xbd/0x310 [ 43.996073] ? kasan_check_read+0x11/0x20 [ 44.000202] ? clear_inode+0x114/0x3a0 [ 44.004080] ? do_raw_write_trylock+0x1c0/0x1c0 [ 44.008743] ? kasan_check_write+0x14/0x20 [ 44.012961] ? lock_acquire+0x1ed/0x520 [ 44.016915] ? integrity_inode_free+0x77/0x320 [ 44.021479] ? ext4_es_remove_extent+0x151/0x500 [ 44.026220] ? lock_release+0x970/0x970 [ 44.030181] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 44.035269] ? depot_save_stack+0x292/0x470 [ 44.039579] ? kasan_check_write+0x14/0x20 [ 44.043795] ? do_raw_write_lock+0xbd/0x1b0 [ 44.048101] integrity_inode_free+0x12f/0x320 [ 44.052583] security_inode_free+0x19/0x90 [ 44.056800] __destroy_inode+0x328/0x820 [ 44.060849] ? generic_update_time+0x450/0x450 [ 44.065412] ? evict+0x5d8/0x980 [ 44.068786] ? lock_downgrade+0x900/0x900 [ 44.072919] ? __inode_wait_for_writeback+0x2cf/0x380 [ 44.078094] destroy_inode+0xda/0x200 [ 44.081881] ? __destroy_inode+0x820/0x820 [ 44.086095] ? kasan_check_write+0x14/0x20 [ 44.090326] ? do_raw_spin_lock+0xc1/0x200 [ 44.094542] evict+0x5e0/0x980 [ 44.097723] ? jbd2_journal_stop+0x430/0x15d0 [ 44.102207] ? destroy_inode+0x200/0x200 [ 44.106253] ? do_raw_spin_lock+0xc1/0x200 [ 44.110469] ? iput+0x671/0xa90 [ 44.113749] ? lock_downgrade+0x900/0x900 [ 44.117883] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 44.123405] ? kasan_check_read+0x11/0x20 [ 44.127534] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 44.132100] ? lock_downgrade+0x900/0x900 [ 44.136232] ? ext4_ioctl+0x231b/0x4210 [ 44.140190] iput+0x679/0xa90 [ 44.143283] ? inode_add_lru+0x2a0/0x2a0 [ 44.147336] ? up_write+0x7b/0x220 [ 44.151034] ? up_read+0x110/0x110 [ 44.154558] ? up_read+0x110/0x110 [ 44.158084] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.163621] ? check_preemption_disabled+0x48/0x200 [ 44.168639] ext4_ioctl+0x236f/0x4210 [ 44.172427] ? is_bpf_text_address+0xac/0x170 [ 44.176931] ? ext4_ioctl_group_add+0x560/0x560 [ 44.181588] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 44.187368] ? kasan_check_read+0x11/0x20 [ 44.191500] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 44.196759] ? rcu_bh_qs+0xc0/0xc0 [ 44.200285] ? unwind_dump+0x190/0x190 [ 44.204157] ? is_bpf_text_address+0xd3/0x170 [ 44.208638] ? kernel_text_address+0x79/0xf0 [ 44.213031] ? __kernel_text_address+0xd/0x40 [ 44.217521] ? unwind_get_return_address+0x61/0xa0 [ 44.222437] ? __save_stack_trace+0x8d/0xf0 [ 44.226745] ? save_stack+0xa9/0xd0 [ 44.230353] ? save_stack+0x43/0xd0 [ 44.233961] ? __kasan_slab_free+0x102/0x150 [ 44.238347] ? kasan_slab_free+0xe/0x10 [ 44.242308] ? kmem_cache_free+0x83/0x290 [ 44.246436] ? putname+0xf2/0x130 [ 44.249874] ? do_sys_open+0x54d/0x700 [ 44.253742] ? __x64_sys_openat+0x9d/0x100 [ 44.257975] ? do_syscall_64+0x1b9/0x820 [ 44.262023] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.267373] ? trace_hardirqs_off+0xb8/0x310 [ 44.271763] ? kasan_check_read+0x11/0x20 [ 44.275897] ? do_raw_spin_unlock+0xa7/0x2f0 [ 44.280289] ? trace_hardirqs_on+0x310/0x310 [ 44.284681] ? kasan_check_write+0x14/0x20 [ 44.288905] ? trace_hardirqs_off+0xb8/0x310 [ 44.293300] ? trace_hardirqs_on+0x310/0x310 [ 44.297694] ? ext4_ioctl_group_add+0x560/0x560 [ 44.302354] do_vfs_ioctl+0x1de/0x1720 [ 44.306228] ? trace_hardirqs_on+0xbd/0x310 [ 44.310542] ? ioctl_preallocate+0x300/0x300 [ 44.314934] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.320453] ? __fget_light+0x2e9/0x430 [ 44.324408] ? fget_raw+0x20/0x20 [ 44.327841] ? putname+0xf2/0x130 [ 44.331279] ? kmem_cache_free+0x21a/0x290 [ 44.335494] ? putname+0xf7/0x130 [ 44.338937] ? security_file_ioctl+0x94/0xc0 [ 44.343328] ksys_ioctl+0xa9/0xd0 [ 44.346931] __x64_sys_ioctl+0x73/0xb0 [ 44.350805] do_syscall_64+0x1b9/0x820 [ 44.354671] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 44.360124] ? syscall_return_slowpath+0x5e0/0x5e0 [ 44.365037] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.369865] ? trace_hardirqs_on_caller+0x310/0x310 [ 44.374864] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 44.379873] ? prepare_exit_to_usermode+0x291/0x3b0 [ 44.384876] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.389716] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.394887] RIP: 0033:0x440029 [ 44.398069] 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 [ 44.417659] RSP: 002b:00007ffcd985ac28 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 44.425349] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440029 [ 44.432599] RDX: 0000000000440029 RSI: 0000000000006611 RDI: 0000000000000004 [ 44.439853] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 44.447104] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004018b0 [ 44.454352] R13: 0000000000401940 R14: 0000000000000000 R15: 0000000000000000 [ 44.461616] Modules linked in: [ 44.464953] ---[ end trace fe35f3af1faa995c ]--- [ 44.469783] RIP: 0010:rb_erase+0x306/0x3710 [ 44.474105] 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 [ 44.493025] RSP: 0018:ffff8801d7e46918 EFLAGS: 00010202 [ 44.498395] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 44.505688] RDX: 1ffff1003afc8d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 44.512989] RBP: ffff8801d7e47320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 44.520291] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b934d1f0 [ 44.527560] R13: dffffc0000000000 R14: ffff8801d7e472f8 R15: ffff8801d7e47438 [ 44.534853] FS: 0000000000bbf880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 44.543101] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.548966] CR2: 0000000020000040 CR3: 00000001bc0fd000 CR4: 00000000001406e0 [ 44.556258] Kernel panic - not syncing: Fatal exception [ 44.562454] Kernel Offset: disabled [ 44.566078] Rebooting in 86400 seconds..