[ 24.358210] audit: type=1800 audit(1539948085.472:21): pid=5183 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [ 24.384930] audit: type=1800 audit(1539948085.472:22): pid=5183 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 25.252395] cron (5241) used greatest stack depth: 15976 bytes left [....] 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: [ 32.976691] kasan: CONFIG_KASAN_INLINE enabled [ 32.981460] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 32.988894] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 32.995135] CPU: 0 PID: 5335 Comm: syz-executor791 Not tainted 4.19.0-rc7+ #147 [ 33.002563] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.011910] RIP: 0010:rb_erase+0x306/0x3710 [ 33.016216] 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 [ 33.035107] RSP: 0018:ffff8801b7b7e918 EFLAGS: 00010202 [ 33.040451] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 33.047699] RDX: 1ffff10036f6fd2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 33.054950] RBP: ffff8801b7b7f320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 33.062201] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801b76e5930 [ 33.069556] R13: dffffc0000000000 R14: ffff8801b7b7f2f8 R15: ffff8801b7b7f438 [ 33.076822] FS: 000000000092e880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 33.085048] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.090929] CR2: 00000000200000c0 CR3: 00000001b7ac3000 CR4: 00000000001406f0 [ 33.098180] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.105430] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.112693] Call Trace: [ 33.115273] ? lockdep_on+0x50/0x50 [ 33.118887] ? rb_insert_color+0x1460/0x1460 [ 33.123289] ? lock_downgrade+0x900/0x900 [ 33.127419] ? noop_count+0x40/0x40 [ 33.131027] ? lock_pin_lock+0x350/0x350 [ 33.135087] ? rcu_bh_qs+0xc0/0xc0 [ 33.138624] ? unwind_dump+0x190/0x190 [ 33.142493] ? kasan_check_read+0x11/0x20 [ 33.146622] ? noop_count+0x40/0x40 [ 33.150247] ? lock_pin_lock+0x350/0x350 [ 33.154308] ? mark_held_locks+0x130/0x130 [ 33.158526] ? check_usage_forwards+0x3e0/0x3e0 [ 33.163176] ? __bfs+0x385/0x7a0 [ 33.166522] ? check_usage+0x1a9/0x790 [ 33.170389] ? lock_pin_lock+0x350/0x350 [ 33.174429] ? check_usage_forwards+0x3e0/0x3e0 [ 33.179079] ? __bfs+0x385/0x7a0 [ 33.182463] ? modules_open+0xa0/0xa0 [ 33.186255] ? lockdep_on+0x50/0x50 [ 33.189866] ? lock_pin_lock+0x350/0x350 [ 33.193916] ? mark_held_locks+0x130/0x130 [ 33.198137] ? kasan_check_read+0x11/0x20 [ 33.202268] ? __lock_acquire+0x2881/0x4ec0 [ 33.206578] ? mark_held_locks+0x130/0x130 [ 33.210802] ? print_usage_bug+0xc0/0xc0 [ 33.214848] ? _raw_spin_unlock+0x2c/0x50 [ 33.218983] ? graph_lock+0x170/0x170 [ 33.222766] ? ext4_exit_mballoc+0xc0/0xc0 [ 33.226984] ? __lock_acquire+0x7ec/0x4ec0 [ 33.231220] ? find_held_lock+0x36/0x1c0 [ 33.235296] ? mark_held_locks+0x130/0x130 [ 33.239514] ? lock_downgrade+0x900/0x900 [ 33.243646] ? ext4_es_scan+0x960/0x960 [ 33.247632] ? do_raw_write_trylock+0x1c0/0x1c0 [ 33.252282] ? kasan_check_write+0x14/0x20 [ 33.256533] ? lock_acquire+0x1ed/0x520 [ 33.260497] ? integrity_inode_free+0x77/0x320 [ 33.265067] ? ext4_es_remove_extent+0x151/0x500 [ 33.269810] ? lock_release+0x970/0x970 [ 33.273775] ? kasan_check_write+0x14/0x20 [ 33.277997] ? do_raw_write_lock+0xbd/0x1b0 [ 33.282302] integrity_inode_free+0x12f/0x320 [ 33.286886] security_inode_free+0x19/0x90 [ 33.291116] __destroy_inode+0x328/0x820 [ 33.295175] ? generic_update_time+0x450/0x450 [ 33.299755] ? evict+0x5d8/0x980 [ 33.303105] ? lock_downgrade+0x900/0x900 [ 33.307237] ? __inode_wait_for_writeback+0x2cf/0x380 [ 33.312410] destroy_inode+0xda/0x200 [ 33.316188] ? __destroy_inode+0x820/0x820 [ 33.320405] ? kasan_check_write+0x14/0x20 [ 33.324621] ? do_raw_spin_lock+0xc1/0x200 [ 33.328837] evict+0x5e0/0x980 [ 33.332015] ? destroy_inode+0x200/0x200 [ 33.336062] ? iput+0x671/0xa90 [ 33.339325] ? lock_downgrade+0x900/0x900 [ 33.343480] ? kasan_check_read+0x11/0x20 [ 33.347611] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 33.352176] ? lock_downgrade+0x900/0x900 [ 33.356393] iput+0x679/0xa90 [ 33.359481] ? inode_add_lru+0x2a0/0x2a0 [ 33.363572] ? up_write+0x7b/0x220 [ 33.367107] ? up_read+0x110/0x110 [ 33.370638] ? up_read+0x110/0x110 [ 33.374161] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.379683] ? check_preemption_disabled+0x48/0x200 [ 33.384683] ext4_ioctl+0x236f/0x4210 [ 33.388484] ? is_bpf_text_address+0xac/0x170 [ 33.392994] ? ext4_ioctl_group_add+0x560/0x560 [ 33.397647] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 33.403422] ? kasan_check_read+0x11/0x20 [ 33.407582] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 33.412840] ? rcu_bh_qs+0xc0/0xc0 [ 33.416362] ? rcu_bh_qs+0xc0/0xc0 [ 33.419885] ? unwind_dump+0x190/0x190 [ 33.423773] ? is_bpf_text_address+0xd3/0x170 [ 33.428294] ? kernel_text_address+0x79/0xf0 [ 33.432697] ? __kernel_text_address+0xd/0x40 [ 33.437174] ? unwind_get_return_address+0x61/0xa0 [ 33.442091] ? __save_stack_trace+0x8d/0xf0 [ 33.446395] ? save_stack+0xa9/0xd0 [ 33.450006] ? save_stack+0x43/0xd0 [ 33.453625] ? __kasan_slab_free+0x102/0x150 [ 33.458012] ? kasan_slab_free+0xe/0x10 [ 33.461971] ? kmem_cache_free+0x83/0x290 [ 33.466100] ? putname+0xf2/0x130 [ 33.469545] ? do_sys_open+0x54d/0x700 [ 33.473414] ? __x64_sys_openat+0x9d/0x100 [ 33.477633] ? do_syscall_64+0x1b9/0x820 [ 33.481691] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.487041] ? trace_hardirqs_off+0xb8/0x310 [ 33.491467] ? kasan_check_read+0x11/0x20 [ 33.495599] ? do_raw_spin_unlock+0xa7/0x2f0 [ 33.499988] ? trace_hardirqs_on+0x310/0x310 [ 33.504374] ? kasan_check_write+0x14/0x20 [ 33.508592] ? trace_hardirqs_off+0xb8/0x310 [ 33.513002] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.518526] ? check_preemption_disabled+0x48/0x200 [ 33.523546] ? check_preemption_disabled+0x48/0x200 [ 33.528547] ? ext4_ioctl_group_add+0x560/0x560 [ 33.533200] do_vfs_ioctl+0x1de/0x1720 [ 33.537075] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 33.542341] ? ioctl_preallocate+0x300/0x300 [ 33.546748] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.552285] ? __fget_light+0x2e9/0x430 [ 33.556262] ? fget_raw+0x20/0x20 [ 33.559698] ? putname+0xf2/0x130 [ 33.563133] ? rcu_read_lock_sched_held+0x108/0x120 [ 33.568136] ? kmem_cache_free+0x24f/0x290 [ 33.572354] ? putname+0xf7/0x130 [ 33.575798] ? do_syscall_64+0x9a/0x820 [ 33.579753] ? do_syscall_64+0x9a/0x820 [ 33.583715] ? lockdep_hardirqs_on+0x421/0x5c0 [ 33.588309] ? security_file_ioctl+0x94/0xc0 [ 33.592716] ksys_ioctl+0xa9/0xd0 [ 33.596154] __x64_sys_ioctl+0x73/0xb0 [ 33.600026] do_syscall_64+0x1b9/0x820 [ 33.603898] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 33.609248] ? syscall_return_slowpath+0x5e0/0x5e0 [ 33.614163] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.618991] ? trace_hardirqs_on_caller+0x310/0x310 [ 33.623992] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 33.628995] ? prepare_exit_to_usermode+0x291/0x3b0 [ 33.633995] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.638826] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.643999] RIP: 0033:0x440029 [ 33.647181] 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 [ 33.666080] RSP: 002b:00007ffc646f5c58 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 33.673786] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440029 [ 33.681045] RDX: 0000000000440029 RSI: 0000000000006611 RDI: 0000000000000003 [ 33.688302] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 33.695553] R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004018b0 [ 33.702810] R13: 0000000000401940 R14: 0000000000000000 R15: 0000000000000000 [ 33.710181] Modules linked in: [ 33.713492] ---[ end trace 65ee7683a504e6f3 ]--- [ 33.718342] RIP: 0010:rb_erase+0x306/0x3710 [ 33.722649] 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 [ 33.741593] RSP: 0018:ffff8801b7b7e918 EFLAGS: 00010202 [ 33.746989] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 33.754376] RDX: 1ffff10036f6fd2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 33.761680] RBP: ffff8801b7b7f320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 33.768964] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801b76e5930 [ 33.776230] R13: dffffc0000000000 R14: ffff8801b7b7f2f8 R15: ffff8801b7b7f438 [ 33.783514] FS: 000000000092e880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 33.791770] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.797668] CR2: 00000000200000c0 CR3: 00000001b7ac3000 CR4: 00000000001406f0 [ 33.804938] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.812220] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.819507] Kernel panic - not syncing: Fatal exception [ 33.825731] Kernel Offset: disabled [ 33.829355] Rebooting in 86400 seconds..