XFS (loop4): metadata I/O error in "xfs_btree_read_buf_block+0x1d3/0x2c0" at daddr 0x4 len 2 error 74
XFS (loop4): page discard on page ffffea0001737900, inode 0x26, offset 326656.
general protection fault, probably for non-canonical address 0xdffffc0000000039: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000001c8-0x00000000000001cf]
CPU: 0 PID: 4317 Comm: syz.4.7 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:errseq_set+0x23/0x110 lib/errseq.c:72
Code: 9c fd eb f4 00 00 cc 55 41 57 41 56 41 54 53 89 f3 49 89 fe e8 8e ed 9c fd 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 b7 00 00 00 41 8b 2e bf 01 f0 ff ff 89 de
RSP: 0018:ffffc9000494f250 EFLAGS: 00010206
RAX: 0000000000000039 RBX: 00000000ffffff8b RCX: dffffc0000000000
RDX: ffffc9000cbc1000 RSI: 0000000000018a60 RDI: 0000000000018a61
RBP: 00000000ffffff8b R08: dffffc0000000000 R09: fffffbfff1ff7840
R10: fffffbfff1ff7840 R11: 1ffffffff1ff783f R12: dffffc0000000000
R13: ffffea0001737900 R14: 00000000000001c8 R15: 1ffffd40002e6f23
FS:  00007f9cd2c9e6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558890c808 CR3: 000000005e2a5000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __filemap_set_wb_err+0x1c/0x1b0 mm/filemap.c:730
 mapping_set_error include/linux/pagemap.h:60 [inline]
 iomap_writepage_map fs/iomap/buffered-io.c:1383 [inline]
 iomap_do_writepage+0x1de0/0x2120 fs/iomap/buffered-io.c:1485
 write_cache_pages+0x984/0xfa0 mm/page-writeback.c:2277
 iomap_writepages+0x5a/0x210 fs/iomap/buffered-io.c:1516
 xfs_vm_writepages+0x129/0x180 fs/xfs/xfs_aops.c:488
 do_writepages+0x48d/0x6d0 mm/page-writeback.c:2386
 filemap_fdatawrite_wbc+0x1eb/0x240 mm/filemap.c:400
 __filemap_fdatawrite_range mm/filemap.c:433 [inline]
 file_write_and_wait_range+0x129/0x1e0 mm/filemap.c:810
 xfs_file_fsync+0x193/0x950 fs/xfs/xfs_file.c:182
 generic_write_sync include/linux/fs.h:2989 [inline]
 xfs_file_buffered_write+0x89b/0x9a0 fs/xfs/xfs_file.c:793
 call_write_iter include/linux/fs.h:2172 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x712/0xd00 fs/read_write.c:594
 ksys_pwrite64 fs/read_write.c:701 [inline]
 __do_sys_pwrite64 fs/read_write.c:711 [inline]
 __se_sys_pwrite64 fs/read_write.c:708 [inline]
 __x64_sys_pwrite64+0x194/0x220 fs/read_write.c:708
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f9cd4a36ec9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9cd2c9e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f9cd4c8dfa0 RCX: 00007f9cd4a36ec9
RDX: 0000000000000001 RSI: 0000200000000000 RDI: 0000000000000004
RBP: 00007f9cd4ab9f91 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000004fed0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9cd4c8e038 R14: 00007f9cd4c8dfa0 R15: 00007ffcc7a2e8e8
 </TASK>
Modules linked in:
---[ end trace b3146da9e75898ff ]---
RIP: 0010:errseq_set+0x23/0x110 lib/errseq.c:72
Code: 9c fd eb f4 00 00 cc 55 41 57 41 56 41 54 53 89 f3 49 89 fe e8 8e ed 9c fd 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 b7 00 00 00 41 8b 2e bf 01 f0 ff ff 89 de
RSP: 0018:ffffc9000494f250 EFLAGS: 00010206
RAX: 0000000000000039 RBX: 00000000ffffff8b RCX: dffffc0000000000
RDX: ffffc9000cbc1000 RSI: 0000000000018a60 RDI: 0000000000018a61
RBP: 00000000ffffff8b R08: dffffc0000000000 R09: fffffbfff1ff7840
R10: fffffbfff1ff7840 R11: 1ffffffff1ff783f R12: dffffc0000000000
R13: ffffea0001737900 R14: 00000000000001c8 R15: 1ffffd40002e6f23
FS:  00007f9cd2c9e6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555567dfb5c8 CR3: 000000005e2a5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	9c                   	pushf
   1:	fd                   	std
   2:	eb f4                	jmp    0xfffffff8
   4:	00 00                	add    %al,(%rax)
   6:	cc                   	int3
   7:	55                   	push   %rbp
   8:	41 57                	push   %r15
   a:	41 56                	push   %r14
   c:	41 54                	push   %r12
   e:	53                   	push   %rbx
   f:	89 f3                	mov    %esi,%ebx
  11:	49 89 fe             	mov    %rdi,%r14
  14:	e8 8e ed 9c fd       	call   0xfd9ceda7
  19:	4c 89 f0             	mov    %r14,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	0f b6 04 08          	movzbl (%rax,%rcx,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 b7 00 00 00    	jne    0xed
  36:	41 8b 2e             	mov    (%r14),%ebp
  39:	bf 01 f0 ff ff       	mov    $0xfffff001,%edi
  3e:	89 de                	mov    %ebx,%esi