list_del corruption. prev->next should be ffff888092069c70, but was ffff888092069dd0
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:51!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8977 Comm: syz-executor.0 Not tainted 5.5.0-rc1-next-20191211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_del_entry_valid.cold+0xf/0x4f lib/list_debug.c:51
Code: e8 c9 00 cb fd 0f 0b 48 89 f1 48 c7 c7 c0 10 70 88 4c 89 e6 e8 b5 00 cb fd 0f 0b 4c 89 f6 48 c7 c7 60 12 70 88 e8 a4 00 cb fd <0f> 0b 4c 89 ea 4c 89 f6 48 c7 c7 a0 11 70 88 e8 90 00 cb fd 0f 0b
RSP: 0018:ffffc90002617968 EFLAGS: 00010286
RAX: 0000000000000054 RBX: ffff8882199fa1a0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815e8576 RDI: fffff520004c2f1f
RBP: ffffc90002617980 R08: 0000000000000054 R09: fffffbfff165a7a6
R10: fffffbfff165a7a5 R11: ffffffff8b2d3d2f R12: ffff888092069b10
R13: ffff888092069dd0 R14: ffff888092069c70 R15: ffff888092069c70
FS:  00007f8e38b79700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32f26000 CR3: 0000000093e79000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:131 [inline]
 dentry_unlist fs/dcache.c:522 [inline]
 __dentry_kill+0x1fd/0x600 fs/dcache.c:575
 dentry_kill fs/dcache.c:698 [inline]
 dput+0x62f/0xe10 fs/dcache.c:859
 simple_recursive_removal+0x5bc/0x6d0 fs/libfs.c:302
 debugfs_remove fs/debugfs/inode.c:713 [inline]
 debugfs_remove+0x5e/0x80 fs/debugfs/inode.c:707
 blk_trace_free+0x38/0x140 kernel/trace/blktrace.c:311
 blk_trace_cleanup kernel/trace/blktrace.c:338 [inline]
 __blk_trace_remove+0x78/0xa0 kernel/trace/blktrace.c:351
 blk_trace_ioctl+0x239/0x300 kernel/trace/blktrace.c:724
 blkdev_ioctl+0x126/0x1df0 block/ioctl.c:568
 block_ioctl+0xee/0x130 fs/block_dev.c:1983
 vfs_ioctl fs/ioctl.c:47 [inline]
 file_ioctl fs/ioctl.c:545 [inline]
 do_vfs_ioctl+0x977/0x14e0 fs/ioctl.c:732
 ksys_ioctl+0xab/0xd0 fs/ioctl.c:749
 __do_sys_ioctl fs/ioctl.c:756 [inline]
 __se_sys_ioctl fs/ioctl.c:754 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:754
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a909
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f8e38b78c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a909
RDX: 0000000000000000 RSI: 0000000000001276 RDI: 000000000000000b
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8e38b796d4
R13: 00000000004c2314 R14: 00000000004d7430 R15: 00000000ffffffff
Modules linked in:
---[ end trace 168372f1a8576a44 ]---
RIP: 0010:__list_del_entry_valid.cold+0xf/0x4f lib/list_debug.c:51
Code: e8 c9 00 cb fd 0f 0b 48 89 f1 48 c7 c7 c0 10 70 88 4c 89 e6 e8 b5 00 cb fd 0f 0b 4c 89 f6 48 c7 c7 60 12 70 88 e8 a4 00 cb fd <0f> 0b 4c 89 ea 4c 89 f6 48 c7 c7 a0 11 70 88 e8 90 00 cb fd 0f 0b
RSP: 0018:ffffc90002617968 EFLAGS: 00010286
RAX: 0000000000000054 RBX: ffff8882199fa1a0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815e8576 RDI: fffff520004c2f1f
RBP: ffffc90002617980 R08: 0000000000000054 R09: fffffbfff165a7a6
R10: fffffbfff165a7a5 R11: ffffffff8b2d3d2f R12: ffff888092069b10
R13: ffff888092069dd0 R14: ffff888092069c70 R15: ffff888092069c70
FS:  00007f8e38b79700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32f26000 CR3: 0000000093e79000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400