------------[ cut here ]------------
WARNING: fs/buffer.c:1125 at __getblk_slow fs/buffer.c:1125 [inline], CPU#0: syz.0.1/5979
WARNING: fs/buffer.c:1125 at bdev_getblk+0x580/0x660 fs/buffer.c:1461, CPU#0: syz.0.1/5979
Modules linked in:
CPU: 0 UID: 0 PID: 5979 Comm: syz.0.1 Not tainted 6.16.0-rc4-next-20250702-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__getblk_slow fs/buffer.c:1125 [inline]
RIP: 0010:bdev_getblk+0x580/0x660 fs/buffer.c:1461
Code: 26 fb ff ff e8 b1 60 79 ff 48 c7 c7 60 f0 99 8b 48 c7 c6 b1 59 9e 8d 4c 89 fa 4c 89 e9 e8 18 1b e1 fe eb bd e8 91 60 79 ff 90 <0f> 0b 90 48 b8 00 00 00 00 00 fc ff df 41 80 3c 07 00 74 08 48 89
RSP: 0018:ffffc9000ad0f448 EFLAGS: 00010283
RAX: ffffffff8246744f RBX: ffff888022e70b98 RCX: 0000000000080000
RDX: ffffc9000edcb000 RSI: 0000000000001385 RDI: 0000000000001386
RBP: 0000000000000200 R08: ffffffff8fa17c37 R09: 1ffffffff1f42f86
R10: dffffc0000000000 R11: fffffbfff1f42f87 R12: ffff888029454018
R13: ffff888022e70b80 R14: 0000000000000200 R15: 1ffff110045ce173
FS:  00007fdb9315b6c0(0000) GS:ffff888125c1d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdb9315af98 CR3: 000000002cb32000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __breadahead+0x29/0x220 fs/buffer.c:1470
 sb_breadahead include/linux/buffer_head.h:358 [inline]
 fat_dir_readahead fs/fat/dir.c:67 [inline]
 fat__get_entry fs/fat/dir.c:98 [inline]
 fat_get_entry+0x6b4/0xa90 fs/fat/dir.c:128
 fat_search_long+0x15b/0x1130 fs/fat/dir.c:490
 vfat_find fs/fat/namei_vfat.c:695 [inline]
 vfat_lookup+0x1a5/0x480 fs/fat/namei_vfat.c:709
 lookup_open fs/namei.c:3686 [inline]
 open_last_lookups fs/namei.c:3807 [inline]
 path_openat+0x10fe/0x3830 fs/namei.c:4043
 do_filp_open+0x1fa/0x410 fs/namei.c:4073
 do_sys_openat2+0x121/0x1c0 fs/open.c:1434
 do_sys_open fs/open.c:1449 [inline]
 __do_sys_open fs/open.c:1457 [inline]
 __se_sys_open fs/open.c:1453 [inline]
 __x64_sys_open+0x11e/0x150 fs/open.c:1453
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdb9238e929
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:00007fdb9315b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fdb925b6160 RCX: 00007fdb9238e929
RDX: 0000000000000000 RSI: 0000000000080242 RDI: 0000200000000040
RBP: 00007fdb92410b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fdb925b6160 R15: 00007ffc03ce59b8
 </TASK>