------------[ cut here ]------------
kernel BUG at mm/hugetlb.c:2360!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 8448 Comm: syz.4.728 Not tainted 6.15.0-syzkaller-10402-g4cb6c8af8591 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:alloc_hugetlb_folio_reserve+0xc3/0xd0 mm/hugetlb.c:2360
Code: e8 42 f7 a2 ff 48 c7 c7 80 66 e1 8d e8 b6 d0 48 09 4c 89 f0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 1e f7 a2 ff 90 <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9001c7276a8 EFLAGS: 00010083
RAX: ffffffff821d4a32 RBX: ffffffff99acc148 RCX: 0000000000080000
RDX: ffffc9000c90d000 RSI: 0000000000000442 RDI: 0000000000000443
RBP: 0000000000142cc0 R08: ffffea00015f002f R09: 1ffffd40002be005
R10: dffffc0000000000 R11: fffff940002be006 R12: dffffc0000000000
R13: 1ffffffff3359829 R14: ffffea00015f0000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888125d65000(0063) knlGS:00000000f5046b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000003051affc CR3: 000000007bff4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 memfd_alloc_folio+0x20f/0x3f0 mm/memfd.c:88
 memfd_pin_folios+0xe9c/0x13d0 mm/gup.c:3733
 udmabuf_pin_folios drivers/dma-buf/udmabuf.c:345 [inline]
 udmabuf_create+0x7b5/0xf70 drivers/dma-buf/udmabuf.c:442
 udmabuf_ioctl_create drivers/dma-buf/udmabuf.c:494 [inline]
 udmabuf_ioctl+0x1d1/0x2c0 drivers/dma-buf/udmabuf.c:525
 __do_compat_sys_ioctl fs/ioctl.c:1005 [inline]
 __se_compat_sys_ioctl fs/ioctl.c:948 [inline]
 __ia32_compat_sys_ioctl+0x543/0x840 fs/ioctl.c:948
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0xb6/0x2b0 arch/x86/entry/syscall_32.c:306
 do_fast_syscall_32+0x34/0x80 arch/x86/entry/syscall_32.c:331
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f24539
Code: 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 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f504655c EFLAGS: 00000206 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000040187542
RDX: 00000000800001c0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:alloc_hugetlb_folio_reserve+0xc3/0xd0 mm/hugetlb.c:2360
Code: e8 42 f7 a2 ff 48 c7 c7 80 66 e1 8d e8 b6 d0 48 09 4c 89 f0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 1e f7 a2 ff 90 <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9001c7276a8 EFLAGS: 00010083
RAX: ffffffff821d4a32 RBX: ffffffff99acc148 RCX: 0000000000080000
RDX: ffffc9000c90d000 RSI: 0000000000000442 RDI: 0000000000000443
RBP: 0000000000142cc0 R08: ffffea00015f002f R09: 1ffffd40002be005
R10: dffffc0000000000 R11: fffff940002be006 R12: dffffc0000000000
R13: 1ffffffff3359829 R14: ffffea00015f0000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888125d65000(0063) knlGS:00000000f5046b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000003051affc CR3: 000000007bff4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	03 74 b4 01          	add    0x1(%rsp,%rsi,4),%esi
   4:	10 07                	adc    %al,(%rdi)
   6:	03 74 b0 01          	add    0x1(%rax,%rsi,4),%esi
   a:	10 08                	adc    %cl,(%rax)
   c:	03 74 d8 01          	add    0x1(%rax,%rbx,8),%esi
  20:	00 51 52             	add    %dl,0x52(%rcx)
  23:	55                   	push   %rbp
  24:	89 e5                	mov    %esp,%ebp
  26:	0f 34                	sysenter
  28:	cd 80                	int    $0x80
* 2a:	5d                   	pop    %rbp <-- trapping instruction
  2b:	5a                   	pop    %rdx
  2c:	59                   	pop    %rcx
  2d:	c3                   	ret
  2e:	90                   	nop
  2f:	90                   	nop
  30:	90                   	nop
  31:	90                   	nop
  32:	90                   	nop
  33:	90                   	nop
  34:	90                   	nop
  35:	90                   	nop
  36:	90                   	nop
  37:	90                   	nop
  38:	90                   	nop
  39:	90                   	nop
  3a:	90                   	nop
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop