[ 24.070302] audit: type=1800 audit(1539726312.029:21): pid=5180 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [ 24.102743] audit: type=1800 audit(1539726312.039:22): pid=5180 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. [ 25.201716] sshd (5246) used greatest stack depth: 15688 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.22' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 53.069405] kasan: CONFIG_KASAN_INLINE enabled [ 53.074234] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 53.081587] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 53.087800] CPU: 1 PID: 5336 Comm: syz-executor581 Not tainted 4.19.0-rc7+ #263 [ 53.095226] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.104786] RIP: 0010:rb_erase+0x306/0x3710 [ 53.109091] 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 [ 53.128014] RSP: 0018:ffff8801d8866918 EFLAGS: 00010202 [ 53.133469] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 53.140725] RDX: 1ffff1003b10cd2b RSI: ffffffff8afc5020 RDI: 0000000000000008 [ 53.147981] RBP: ffff8801d8867320 R08: dffffc0000000000 R09: fffffbfff12d68f0 [ 53.155233] R10: fffffbfff12d68f0 R11: ffffffff896b4783 R12: ffff8801b6f21970 [ 53.162489] R13: dffffc0000000000 R14: ffff8801d88672f8 R15: ffff8801d8867438 [ 53.169784] FS: 00000000024d8880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 53.178008] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 53.183871] CR2: 0000000020000080 CR3: 00000001bac3b000 CR4: 00000000001406e0 [ 53.191123] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 53.198376] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 53.205622] Call Trace: [ 53.208194] ? lockdep_on+0x50/0x50 [ 53.211807] ? rb_insert_color+0x1460/0x1460 [ 53.216199] ? lock_downgrade+0x900/0x900 [ 53.220335] ? noop_count+0x40/0x40 [ 53.223946] ? lock_pin_lock+0x350/0x350 [ 53.228204] ? rcu_bh_qs+0xc0/0xc0 [ 53.231739] ? unwind_dump+0x190/0x190 [ 53.235616] ? kasan_check_read+0x11/0x20 [ 53.239753] ? noop_count+0x40/0x40 [ 53.243371] ? lock_pin_lock+0x350/0x350 [ 53.247413] ? mark_held_locks+0x130/0x130 [ 53.251630] ? check_usage_forwards+0x3e0/0x3e0 [ 53.256282] ? __bfs+0x385/0x7a0 [ 53.259633] ? check_usage+0x1a9/0x790 [ 53.263505] ? lock_pin_lock+0x350/0x350 [ 53.267548] ? check_usage_forwards+0x3e0/0x3e0 [ 53.272198] ? __bfs+0x385/0x7a0 [ 53.275808] ? modules_open+0xa0/0xa0 [ 53.279642] ? lockdep_on+0x50/0x50 [ 53.283275] ? lock_pin_lock+0x350/0x350 [ 53.287324] ? mark_held_locks+0x130/0x130 [ 53.291541] ? kasan_check_read+0x11/0x20 [ 53.295677] ? __lock_acquire+0x2881/0x4ec0 [ 53.300124] ? mark_held_locks+0x130/0x130 [ 53.304347] ? print_usage_bug+0xc0/0xc0 [ 53.308393] ? _raw_spin_unlock+0x2c/0x50 [ 53.312523] ? graph_lock+0x170/0x170 [ 53.316309] ? ext4_exit_mballoc+0xc0/0xc0 [ 53.320526] ? __lock_acquire+0x7ec/0x4ec0 [ 53.324748] ? find_held_lock+0x36/0x1c0 [ 53.328797] ? mark_held_locks+0x130/0x130 [ 53.333014] ? lock_downgrade+0x900/0x900 [ 53.337143] ? ext4_es_scan+0x960/0x960 [ 53.341103] ? do_raw_write_trylock+0x1c0/0x1c0 [ 53.345755] ? kasan_check_write+0x14/0x20 [ 53.349974] ? lock_acquire+0x1ed/0x520 [ 53.353930] ? integrity_inode_free+0x77/0x320 [ 53.358492] ? ext4_es_remove_extent+0x151/0x500 [ 53.363235] ? lock_release+0x970/0x970 [ 53.367198] ? kasan_check_write+0x14/0x20 [ 53.371417] ? do_raw_write_lock+0xbd/0x1b0 [ 53.375728] integrity_inode_free+0x12f/0x320 [ 53.380207] security_inode_free+0x19/0x90 [ 53.384470] __destroy_inode+0x328/0x820 [ 53.388524] ? generic_update_time+0x450/0x450 [ 53.393091] ? evict+0x5d8/0x980 [ 53.396444] ? lock_downgrade+0x900/0x900 [ 53.400640] ? __inode_wait_for_writeback+0x2cf/0x380 [ 53.405830] destroy_inode+0xda/0x200 [ 53.409614] ? __destroy_inode+0x820/0x820 [ 53.413873] ? kasan_check_write+0x14/0x20 [ 53.418096] ? do_raw_spin_lock+0xc1/0x200 [ 53.422316] evict+0x5e0/0x980 [ 53.425593] ? destroy_inode+0x200/0x200 [ 53.429637] ? iput+0x671/0xa90 [ 53.432902] ? lock_downgrade+0x900/0x900 [ 53.437033] ? kasan_check_read+0x11/0x20 [ 53.441162] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 53.445727] ? lock_downgrade+0x900/0x900 [ 53.449860] iput+0x679/0xa90 [ 53.452963] ? inode_add_lru+0x2a0/0x2a0 [ 53.457014] ? up_write+0x7b/0x220 [ 53.460655] ? up_read+0x110/0x110 [ 53.464258] ? up_read+0x110/0x110 [ 53.467791] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.473314] ? check_preemption_disabled+0x48/0x200 [ 53.478315] ext4_ioctl+0x236f/0x4210 [ 53.482098] ? is_bpf_text_address+0xac/0x170 [ 53.486578] ? ext4_ioctl_group_add+0x560/0x560 [ 53.491234] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 53.497021] ? kasan_check_read+0x11/0x20 [ 53.501158] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 53.506422] ? rcu_bh_qs+0xc0/0xc0 [ 53.509949] ? rcu_bh_qs+0xc0/0xc0 [ 53.513478] ? unwind_dump+0x190/0x190 [ 53.517353] ? is_bpf_text_address+0xd3/0x170 [ 53.521830] ? kernel_text_address+0x79/0xf0 [ 53.526223] ? __kernel_text_address+0xd/0x40 [ 53.530702] ? unwind_get_return_address+0x61/0xa0 [ 53.535621] ? __save_stack_trace+0x8d/0xf0 [ 53.539930] ? save_stack+0xa9/0xd0 [ 53.543540] ? save_stack+0x43/0xd0 [ 53.547146] ? __kasan_slab_free+0x102/0x150 [ 53.551714] ? kasan_slab_free+0xe/0x10 [ 53.555682] ? kmem_cache_free+0x83/0x290 [ 53.559810] ? putname+0xf2/0x130 [ 53.563250] ? do_sys_open+0x54d/0x700 [ 53.567118] ? __x64_sys_openat+0x9d/0x100 [ 53.571421] ? do_syscall_64+0x1b9/0x820 [ 53.575477] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.580826] ? trace_hardirqs_off+0xb8/0x310 [ 53.585216] ? kasan_check_read+0x11/0x20 [ 53.589347] ? do_raw_spin_unlock+0xa7/0x2f0 [ 53.593740] ? trace_hardirqs_on+0x310/0x310 [ 53.598130] ? kasan_check_write+0x14/0x20 [ 53.602346] ? trace_hardirqs_off+0xb8/0x310 [ 53.606739] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.612284] ? check_preemption_disabled+0x48/0x200 [ 53.617331] ? check_preemption_disabled+0x48/0x200 [ 53.622341] ? ext4_ioctl_group_add+0x560/0x560 [ 53.626996] do_vfs_ioctl+0x1de/0x1720 [ 53.631001] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 53.636266] ? ioctl_preallocate+0x300/0x300 [ 53.640659] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.646188] ? __fget_light+0x2e9/0x430 [ 53.650145] ? fget_raw+0x20/0x20 [ 53.653699] ? putname+0xf2/0x130 [ 53.657142] ? rcu_read_lock_sched_held+0x108/0x120 [ 53.662143] ? kmem_cache_free+0x24f/0x290 [ 53.666362] ? putname+0xf7/0x130 [ 53.669802] ? do_syscall_64+0x9a/0x820 [ 53.673765] ? do_syscall_64+0x9a/0x820 [ 53.677723] ? lockdep_hardirqs_on+0x421/0x5c0 [ 53.682297] ? security_file_ioctl+0x94/0xc0 [ 53.686695] ksys_ioctl+0xa9/0xd0 [ 53.690136] __x64_sys_ioctl+0x73/0xb0 [ 53.694011] do_syscall_64+0x1b9/0x820 [ 53.697894] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 53.703246] ? syscall_return_slowpath+0x5e0/0x5e0 [ 53.708156] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 53.712993] ? trace_hardirqs_on_caller+0x310/0x310 [ 53.718004] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 53.723004] ? prepare_exit_to_usermode+0x291/0x3b0 [ 53.728005] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 53.732835] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.738011] RIP: 0033:0x440009 [ 53.741264] 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 [ 53.760155] RSP: 002b:00007ffece8e2c68 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 53.767849] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 53.775105] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 53.782359] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 53.789611] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 53.796863] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 53.804117] Modules linked in: [ 53.807446] ---[ end trace 020fa719ed356498 ]--- [ 53.812226] RIP: 0010:rb_erase+0x306/0x3710 [ 53.816585] 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 [ 53.835504] RSP: 0018:ffff8801d8866918 EFLAGS: 00010202 [ 53.840952] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 53.848256] RDX: 1ffff1003b10cd2b RSI: ffffffff8afc5020 RDI: 0000000000000008 [ 53.855538] RBP: ffff8801d8867320 R08: dffffc0000000000 R09: fffffbfff12d68f0 [ 53.862828] R10: fffffbfff12d68f0 R11: ffffffff896b4783 R12: ffff8801b6f21970 [ 53.870100] R13: dffffc0000000000 R14: ffff8801d88672f8 R15: ffff8801d8867438 [ 53.877389] FS: 00000000024d8880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 53.885627] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 53.891531] CR2: 0000000020000080 CR3: 00000001bac3b000 CR4: 00000000001406e0 [ 53.898838] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 53.906128] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 53.913413] Kernel panic - not syncing: Fatal exception [ 53.919765] Kernel Offset: disabled [ 53.923386] Rebooting in 86400 seconds..