syzbot

 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4148 [inline]
 slab_alloc_node mm/slub.c:4197 [inline]
 __do_kmalloc_node mm/slub.c:4327 [inline]
 __kmalloc_noprof+0x1d4/0x510 mm/slub.c:4340
 kmalloc_noprof include/linux/slab.h:909 [inline]
 tomoyo_realpath_from_path+0xc2/0x6e0 security/tomoyo/realpath.c:251
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_perm+0x274/0x460 security/tomoyo/file.c:822
 security_inode_getattr+0x116/0x290 security/security.c:2377
 vfs_getattr fs/stat.c:259 [inline]
 vfs_fstat+0x4b/0xe0 fs/stat.c:281
 __do_sys_newfstat+0x87/0x100 fs/stat.c:555
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
------------[ cut here ]------------
kernel BUG at mm/filemap.c:3442!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 22948 Comm: syz.0.3904 Not tainted 6.16.0-rc6-syzkaller-00002-g155a3c003e55 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:filemap_fault+0x1847/0x26c0 mm/filemap.c:3442
Code: 00 e9 d2 ec ff ff 48 8b 7c 24 28 e8 b3 36 2e 00 e9 79 f3 ff ff e8 79 52 c8 ff 48 c7 c6 e0 20 b9 8b 48 89 df e8 3a a0 10 00 90 <0f> 0b e8 62 52 c8 ff 48 c7 c6 e0 16 b9 8b 48 89 df e8 23 a0 10 00
RSP: 0018:ffffc9000b0bf5b8 EFLAGS: 00010246
RAX: 0000000000080000 RBX: ffffea0000d03a80 RCX: ffffc90018134000
RDX: 0000000000080000 RSI: ffffffff81f39f66 RDI: ffff88802c365e44
RBP: ffffc9000b0bf7e8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff888024276ff8
R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000000
FS:  00007f09cbc1d6c0(0000) GS:ffff88812471a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001bc5 CR3: 000000005e847000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __do_fault+0x10d/0x490 mm/memory.c:5169
 do_read_fault mm/memory.c:5590 [inline]
 do_fault mm/memory.c:5724 [inline]
 do_pte_missing mm/memory.c:4251 [inline]
 handle_pte_fault mm/memory.c:6069 [inline]
 __handle_mm_fault+0x3c2a/0x5490 mm/memory.c:6212
 handle_mm_fault+0x589/0xd10 mm/memory.c:6381
 do_user_addr_fault+0x7a6/0x1370 arch/x86/mm/fault.c:1387
 handle_page_fault arch/x86/mm/fault.c:1476 [inline]
 exc_page_fault+0x5c/0xb0 arch/x86/mm/fault.c:1532
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline]
RIP: 0010:raw_copy_from_user arch/x86/include/asm/uaccess_64.h:141 [inline]
RIP: 0010:_inline_copy_from_user include/linux/uaccess.h:178 [inline]
RIP: 0010:_copy_from_user+0x93/0xd0 lib/usercopy.c:18
Code: 02 e2 fc 89 ee 4c 89 ef 48 b8 00 f0 ff ff ff 7f 00 00 48 39 c3 48 0f 47 d8 e8 79 ee 47 fd 0f 01 cb 4c 89 ef 48 89 de 48 89 e9 <f3> a4 0f 1f 00 49 89 cc 48 89 cb 0f 01 ca 31 ff 48 89 ce e8 95 fd
RSP: 0018:ffffc9000b0bfa80 EFLAGS: 00050246
RAX: 0000000000000001 RBX: 0000200000001bc5 RCX: 0000000000000001
RDX: ffffed1006102d21 RSI: 0000200000001bc5 RDI: ffff888030816905
RBP: 0000000000000001 R08: 0000000000000001 R09: ffffed1006102d20
R10: ffff888030816905 R11: 0000000000000001 R12: 0000000000000000
R13: ffff888030816905 R14: dffffc0000000000 R15: 0000200000001bc5
 copy_from_user include/linux/uaccess.h:212 [inline]
 snd_rawmidi_kernel_write1+0x50a/0x8a0 sound/core/rawmidi.c:1560
 snd_rawmidi_write+0x26e/0xc10 sound/core/rawmidi.c:1629
 do_loop_readv_writev fs/read_write.c:850 [inline]
 do_loop_readv_writev fs/read_write.c:835 [inline]
 vfs_writev+0x5df/0xde0 fs/read_write.c:1059
 do_writev+0x28c/0x340 fs/read_write.c:1103
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f09cad8e929
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:00007f09cbc1d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f09cafb5fa0 RCX: 00007f09cad8e929
RDX: 0000000000000002 RSI: 0000200000000840 RDI: 0000000000000005
RBP: 00007f09cae10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f09cafb5fa0 R15: 00007ffe00c2aad8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:filemap_fault+0x1847/0x26c0 mm/filemap.c:3442
Code: 00 e9 d2 ec ff ff 48 8b 7c 24 28 e8 b3 36 2e 00 e9 79 f3 ff ff e8 79 52 c8 ff 48 c7 c6 e0 20 b9 8b 48 89 df e8 3a a0 10 00 90 <0f> 0b e8 62 52 c8 ff 48 c7 c6 e0 16 b9 8b 48 89 df e8 23 a0 10 00
RSP: 0018:ffffc9000b0bf5b8 EFLAGS: 00010246
RAX: 0000000000080000 RBX: ffffea0000d03a80 RCX: ffffc90018134000
RDX: 0000000000080000 RSI: ffffffff81f39f66 RDI: ffff88802c365e44
RBP: ffffc9000b0bf7e8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff888024276ff8
R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000000
FS:  00007f09cbc1d6c0(0000) GS:ffff88812471a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001bc5 CR3: 000000005e847000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	02 e2                	add    %dl,%ah
   2:	fc                   	cld
   3:	89 ee                	mov    %ebp,%esi
   5:	4c 89 ef             	mov    %r13,%rdi
   8:	48 b8 00 f0 ff ff ff 	movabs $0x7ffffffff000,%rax
   f:	7f 00 00
  12:	48 39 c3             	cmp    %rax,%rbx
  15:	48 0f 47 d8          	cmova  %rax,%rbx
  19:	e8 79 ee 47 fd       	call   0xfd47ee97
  1e:	0f 01 cb             	stac
  21:	4c 89 ef             	mov    %r13,%rdi
  24:	48 89 de             	mov    %rbx,%rsi
  27:	48 89 e9             	mov    %rbp,%rcx
* 2a:	f3 a4                	rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction
  2c:	0f 1f 00             	nopl   (%rax)
  2f:	49 89 cc             	mov    %rcx,%r12
  32:	48 89 cb             	mov    %rcx,%rbx
  35:	0f 01 ca             	clac
  38:	31 ff                	xor    %edi,%edi
  3a:	48 89 ce             	mov    %rcx,%rsi
  3d:	e8                   	.byte 0xe8
  3e:	95                   	xchg   %eax,%ebp
  3f:	fd                   	std