syzbot

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BUG: KCSAN: data-race in bdev_statx / queue_limits_commit_update

read to 0xffff888102115b28 of 4 bytes by task 3303 on cpu 1:
 queue_io_min include/linux/blkdev.h:1405 [inline]
 bdev_io_min include/linux/blkdev.h:1410 [inline]
 bdev_statx+0x295/0x2d0 block/bdev.c:1359
 vfs_getattr_nosec+0x1b6/0x1e0 fs/stat.c:227
 vfs_getattr fs/stat.c:262 [inline]
 vfs_fstat fs/stat.c:281 [inline]
 __do_sys_newfstat fs/stat.c:555 [inline]
 __se_sys_newfstat+0x96/0x2e0 fs/stat.c:550
 __x64_sys_newfstat+0x31/0x40 fs/stat.c:550
 x64_sys_call+0x2c51/0x3000 arch/x86/include/generated/asm/syscalls_64.h:6
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd8/0x2c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

write to 0xffff888102115ae8 of 192 bytes by task 5854 on cpu 0:
 queue_limits_commit_update+0x4b/0x160 block/blk-settings.c:573
 loop_configure+0x78c/0x9c0 drivers/block/loop.c:1065
 lo_ioctl+0x1e1/0x12b0 drivers/block/loop.c:1535
 blkdev_ioctl+0x37d/0x460 block/ioctl.c:791
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xce/0x140 fs/ioctl.c:583
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:583
 x64_sys_call+0x14b0/0x3000 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd8/0x2c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 5854 Comm: syz.7.503 Tainted: G        W           syzkaller #0 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
==================================================================
loop7: detected capacity change from 0 to 512
EXT4-fs (loop7): encrypted files will use data=ordered instead of data journaling mode
[EXT4 FS bs=1024, gc=1, bpg=8192, ipg=32, mo=200ec018, mo2=0002]
System zones: 1-12
EXT4-fs (loop7): 1 truncate cleaned up
EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.