general protection fault in list

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.14	KASAN: use-after-free Write in list_sort xfs	C			2	421d	456d	0/1	upstream: reported C repro on 2023/01/18 00:18
XFS (loop1): Mounting V4 Filesystem 5e6273b8-2167-42bb-911b-418aa14a1261
XFS (loop1): totally zeroed log
XFS (loop1): Ending clean mount
XFS (loop1): Quotacheck needed: Please wait.
general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 1 PID: 7503 Comm: syz-executor.1 Not tainted 6.4.0-rc3-syzkaller-00032-g933174ae28ba #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:list_sort+0x2dd/0x970 lib/list_sort.c:232
Code: e8 03 42 80 3c 38 00 0f 85 08 06 00 00 48 8b 44 24 10 48 89 28 e8 13 c9 73 fd 4c 8d 63 08 48 8b 6c 24 70 4c 89 e0 48 c1 e8 03 <42> 80 3c 38 00 0f 85 57 06 00 00 48 89 d8 48 89 6b 08 48 c1 e8 03
RSP: 0018:ffffc9000df7f518 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffc90003949000
RDX: 0000000000040000 RSI: ffffffff841079bd RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000008
R13: 1ffff92001befee8 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff88802c700000(0063) knlGS:00000000f7f1ab40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f727fc30 CR3: 0000000048ed4000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 xfs_buf_delwri_submit_buffers+0x97/0x990 fs/xfs/xfs_buf.c:2151
 xfs_buf_delwri_pushbuf+0x261/0x4a0 fs/xfs/xfs_buf.c:2304
 xfs_qm_flush_one+0x351/0x3b0 fs/xfs/xfs_qm.c:1253
 xfs_qm_dquot_walk.isra.0+0x1be/0x3f0 fs/xfs/xfs_qm.c:87
 xfs_qm_quotacheck+0x3c0/0x940 fs/xfs/xfs_qm.c:1338
 xfs_qm_mount_quotas+0x125/0x690 fs/xfs/xfs_qm.c:1457
 xfs_mountfs+0x1e07/0x1f60 fs/xfs/xfs_mount.c:959
 xfs_fs_fill_super+0x145b/0x1f80 fs/xfs/xfs_super.c:1693
 get_tree_bdev+0x44a/0x770 fs/super.c:1303
 vfs_get_tree+0x8d/0x350 fs/super.c:1510
 do_new_mount fs/namespace.c:3039 [inline]
 path_mount+0x134b/0x1e40 fs/namespace.c:3369
 do_mount fs/namespace.c:3382 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount fs/namespace.c:3568 [inline]
 __ia32_sys_mount+0x282/0x300 fs/namespace.c:3568
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x70/0x82
RIP: 0023:0xf7f1f579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f7f1a410 EFLAGS: 00000296 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00000000f7f1a480 RCX: 000000002000bb40
RDX: 000000002000bb00 RSI: 0000000002000000 RDI: 00000000f7f1a4c0
RBP: 00000000f7f1a4c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:list_sort+0x2dd/0x970 lib/list_sort.c:232
Code: e8 03 42 80 3c 38 00 0f 85 08 06 00 00 48 8b 44 24 10 48 89 28 e8 13 c9 73 fd 4c 8d 63 08 48 8b 6c 24 70 4c 89 e0 48 c1 e8 03 <42> 80 3c 38 00 0f 85 57 06 00 00 48 89 d8 48 89 6b 08 48 c1 e8 03
RSP: 0018:ffffc9000df7f518 EFLAGS: 00010202

RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffc90003949000
RDX: 0000000000040000 RSI: ffffffff841079bd RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000008
----------------
Code disassembly (best guess):
   0:	e8 03 42 80 3c       	callq  0x3c804208
   5:	38 00                	cmp    %al,(%rax)
   7:	0f 85 08 06 00 00    	jne    0x615
   d:	48 8b 44 24 10       	mov    0x10(%rsp),%rax
  12:	48 89 28             	mov    %rbp,(%rax)
  15:	e8 13 c9 73 fd       	callq  0xfd73c92d
  1a:	4c 8d 63 08          	lea    0x8(%rbx),%r12
  1e:	48 8b 6c 24 70       	mov    0x70(%rsp),%rbp
  23:	4c 89 e0             	mov    %r12,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1) <-- trapping instruction
  2f:	0f 85 57 06 00 00    	jne    0x68c
  35:	48 89 d8             	mov    %rbx,%rax
  38:	48 89 6b 08          	mov    %rbp,0x8(%rbx)
  3c:	48 c1 e8 03          	shr    $0x3,%rax