[ 23.952913] audit: type=1800 audit(1539956320.859:21): pid=5190 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [ 23.982342] audit: type=1800 audit(1539956320.859:22): pid=5190 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. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [ 25.015637] sshd (5258) used greatest stack depth: 15496 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.31' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 50.189426] kasan: CONFIG_KASAN_INLINE enabled [ 50.194202] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 50.201631] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 50.207873] CPU: 0 PID: 5346 Comm: syz-executor985 Not tainted 4.19.0-rc8+ #291 [ 50.215306] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.224653] RIP: 0010:rb_erase+0x306/0x3710 [ 50.228962] 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 [ 50.247855] RSP: 0018:ffff8801d8ac6918 EFLAGS: 00010202 [ 50.253198] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 50.260454] RDX: 1ffff1003b158d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 50.267706] RBP: ffff8801d8ac7320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 50.274961] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801c38014f0 [ 50.282318] R13: dffffc0000000000 R14: ffff8801d8ac72f8 R15: ffff8801d8ac7438 [ 50.289572] FS: 000000000092b880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 50.297778] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 50.303643] CR2: 00000000200000c0 CR3: 00000001bab17000 CR4: 00000000001406f0 [ 50.310897] Call Trace: [ 50.313475] ? lockdep_on+0x50/0x50 [ 50.317088] ? rb_insert_color+0x1460/0x1460 [ 50.321527] ? lock_downgrade+0x900/0x900 [ 50.325670] ? noop_count+0x40/0x40 [ 50.329293] ? lock_pin_lock+0x350/0x350 [ 50.333350] ? rcu_bh_qs+0xc0/0xc0 [ 50.336880] ? unwind_dump+0x190/0x190 [ 50.340754] ? kasan_check_read+0x11/0x20 [ 50.344889] ? noop_count+0x40/0x40 [ 50.348509] ? lock_pin_lock+0x350/0x350 [ 50.352656] ? mark_held_locks+0x130/0x130 [ 50.356879] ? check_usage_forwards+0x3e0/0x3e0 [ 50.361530] ? __bfs+0x385/0x7a0 [ 50.364883] ? check_usage+0x1a9/0x790 [ 50.368751] ? lock_pin_lock+0x350/0x350 [ 50.372799] ? check_usage_forwards+0x3e0/0x3e0 [ 50.377451] ? __bfs+0x385/0x7a0 [ 50.380805] ? modules_open+0xa0/0xa0 [ 50.384591] ? lockdep_on+0x50/0x50 [ 50.388204] ? lock_pin_lock+0x350/0x350 [ 50.392257] ? mark_held_locks+0x130/0x130 [ 50.396480] ? kasan_check_read+0x11/0x20 [ 50.400622] ? __lock_acquire+0x2881/0x4ec0 [ 50.404984] ? mark_held_locks+0x130/0x130 [ 50.409201] ? print_usage_bug+0xc0/0xc0 [ 50.413410] ? _raw_spin_unlock+0x2c/0x50 [ 50.417646] ? graph_lock+0x170/0x170 [ 50.421429] ? ext4_exit_mballoc+0xc0/0xc0 [ 50.425645] ? __lock_acquire+0x7ec/0x4ec0 [ 50.429864] ? find_held_lock+0x36/0x1c0 [ 50.433914] ? mark_held_locks+0x130/0x130 [ 50.438145] ? lock_downgrade+0x900/0x900 [ 50.442281] ? ext4_es_scan+0x960/0x960 [ 50.446243] ? lock_release+0x970/0x970 [ 50.450202] ? do_raw_write_trylock+0x1c0/0x1c0 [ 50.454870] ? kasan_check_write+0x14/0x20 [ 50.459089] ? lock_acquire+0x1ed/0x520 [ 50.463050] ? integrity_inode_free+0x77/0x320 [ 50.467615] ? ext4_es_remove_extent+0x151/0x500 [ 50.472354] ? lock_release+0x970/0x970 [ 50.476312] ? kasan_check_write+0x14/0x20 [ 50.480532] ? do_raw_write_lock+0xbd/0x1b0 [ 50.484970] integrity_inode_free+0x12f/0x320 [ 50.489452] security_inode_free+0x19/0x90 [ 50.493670] __destroy_inode+0x328/0x820 [ 50.497713] ? generic_update_time+0x450/0x450 [ 50.502283] ? evict+0x5d8/0x980 [ 50.505636] ? lock_downgrade+0x900/0x900 [ 50.509771] ? __inode_wait_for_writeback+0x2cf/0x380 [ 50.515000] destroy_inode+0xda/0x200 [ 50.518860] ? __destroy_inode+0x820/0x820 [ 50.523091] ? kasan_check_write+0x14/0x20 [ 50.527323] ? do_raw_spin_lock+0xc1/0x200 [ 50.531544] evict+0x5e0/0x980 [ 50.534722] ? destroy_inode+0x200/0x200 [ 50.538765] ? iput+0x671/0xa90 [ 50.542038] ? lock_downgrade+0x900/0x900 [ 50.546178] ? kasan_check_read+0x11/0x20 [ 50.550328] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 50.555002] ? lock_downgrade+0x900/0x900 [ 50.559150] iput+0x679/0xa90 [ 50.562393] ? inode_add_lru+0x2a0/0x2a0 [ 50.566449] ? up_write+0x7b/0x220 [ 50.569975] ? up_read+0x110/0x110 [ 50.573504] ? up_read+0x110/0x110 [ 50.577038] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.582565] ? check_preemption_disabled+0x48/0x200 [ 50.587658] ext4_ioctl+0x236f/0x4210 [ 50.591457] ? is_bpf_text_address+0xac/0x170 [ 50.596127] ? ext4_ioctl_group_add+0x560/0x560 [ 50.600786] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 50.606568] ? kasan_check_read+0x11/0x20 [ 50.610709] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 50.615970] ? rcu_bh_qs+0xc0/0xc0 [ 50.619496] ? rcu_bh_qs+0xc0/0xc0 [ 50.623023] ? unwind_dump+0x190/0x190 [ 50.626900] ? is_bpf_text_address+0xd3/0x170 [ 50.631380] ? kernel_text_address+0x79/0xf0 [ 50.635818] ? __kernel_text_address+0xd/0x40 [ 50.640339] ? unwind_get_return_address+0x61/0xa0 [ 50.645263] ? __save_stack_trace+0x8d/0xf0 [ 50.649577] ? save_stack+0xa9/0xd0 [ 50.653188] ? save_stack+0x43/0xd0 [ 50.656796] ? __kasan_slab_free+0x102/0x150 [ 50.661189] ? kasan_slab_free+0xe/0x10 [ 50.665146] ? kmem_cache_free+0x83/0x290 [ 50.669277] ? putname+0xf2/0x130 [ 50.672719] ? do_sys_open+0x54d/0x700 [ 50.676588] ? __x64_sys_openat+0x9d/0x100 [ 50.680806] ? do_syscall_64+0x1b9/0x820 [ 50.684865] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.690216] ? trace_hardirqs_off+0xb8/0x310 [ 50.694622] ? kasan_check_read+0x11/0x20 [ 50.698762] ? do_raw_spin_unlock+0xa7/0x2f0 [ 50.703158] ? trace_hardirqs_on+0x310/0x310 [ 50.707555] ? kasan_check_write+0x14/0x20 [ 50.711777] ? trace_hardirqs_off+0xb8/0x310 [ 50.716215] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.721757] ? check_preemption_disabled+0x48/0x200 [ 50.726758] ? check_preemption_disabled+0x48/0x200 [ 50.731775] ? ext4_ioctl_group_add+0x560/0x560 [ 50.736442] do_vfs_ioctl+0x1de/0x1720 [ 50.740323] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 50.745586] ? ioctl_preallocate+0x300/0x300 [ 50.749993] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.755540] ? __fget_light+0x2e9/0x430 [ 50.759502] ? fget_raw+0x20/0x20 [ 50.762979] ? putname+0xf2/0x130 [ 50.766434] ? rcu_read_lock_sched_held+0x108/0x120 [ 50.771439] ? kmem_cache_free+0x24f/0x290 [ 50.775721] ? putname+0xf7/0x130 [ 50.779173] ? do_syscall_64+0x9a/0x820 [ 50.783137] ? do_syscall_64+0x9a/0x820 [ 50.787095] ? lockdep_hardirqs_on+0x421/0x5c0 [ 50.791665] ? security_file_ioctl+0x94/0xc0 [ 50.796058] ksys_ioctl+0xa9/0xd0 [ 50.799497] __x64_sys_ioctl+0x73/0xb0 [ 50.803368] do_syscall_64+0x1b9/0x820 [ 50.807242] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 50.812589] ? syscall_return_slowpath+0x5e0/0x5e0 [ 50.817502] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.822328] ? trace_hardirqs_on_caller+0x310/0x310 [ 50.827325] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 50.832323] ? prepare_exit_to_usermode+0x291/0x3b0 [ 50.837322] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.842153] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.847372] RIP: 0033:0x440029 [ 50.850558] 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 [ 50.869444] RSP: 002b:00007ffec1cb6e98 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 50.877138] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440029 [ 50.884392] RDX: 0000000000440029 RSI: 0000000000006611 RDI: 0000000000000003 [ 50.891645] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 50.898902] R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004018b0 [ 50.906154] R13: 0000000000401940 R14: 0000000000000000 R15: 0000000000000000 [ 50.913551] Modules linked in: [ 50.917056] ---[ end trace 4731b576ed8924ef ]--- [ 50.921845] RIP: 0010:rb_erase+0x306/0x3710 [ 50.926180] 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 [ 50.945108] RSP: 0018:ffff8801d8ac6918 EFLAGS: 00010202 [ 50.950504] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 50.957788] RDX: 1ffff1003b158d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 50.965100] RBP: ffff8801d8ac7320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 50.972405] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801c38014f0 [ 50.979667] R13: dffffc0000000000 R14: ffff8801d8ac72f8 R15: ffff8801d8ac7438 [ 50.987003] FS: 000000000092b880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 50.995292] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 51.001199] CR2: 00000000200000c0 CR3: 00000001bab17000 CR4: 00000000001406f0 [ 51.008472] Kernel panic - not syncing: Fatal exception [ 51.014667] Kernel Offset: disabled [ 51.018288] Rebooting in 86400 seconds..