syzbot

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BUG: KCSAN: data-race in bdev_statx / queue_limits_commit_update

read to 0xffff8881023a0488 of 4 bytes by task 3295 on cpu 0:
 queue_io_min include/linux/blkdev.h:1383 [inline]
 bdev_io_min include/linux/blkdev.h:1388 [inline]
 bdev_statx+0x295/0x2d0 block/bdev.c:1342
 vfs_getattr_nosec+0x1b6/0x1e0 fs/stat.c:227
 vfs_getattr fs/stat.c:262 [inline]
 vfs_statx_path fs/stat.c:299 [inline]
 vfs_statx+0x113/0x390 fs/stat.c:356
 vfs_fstatat+0x115/0x170 fs/stat.c:375
 __do_sys_newfstatat fs/stat.c:542 [inline]
 __se_sys_newfstatat+0x55/0x260 fs/stat.c:536
 __x64_sys_newfstatat+0x55/0x70 fs/stat.c:536
 x64_sys_call+0x135a/0x2ff0 arch/x86/include/generated/asm/syscalls_64.h:263
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

write to 0xffff8881023a0448 of 192 bytes by task 6773 on cpu 1:
 queue_limits_commit_update+0x4c/0x110 block/blk-settings.c:509
 loop_configure+0x79c/0xa50 drivers/block/loop.c:1052
 lo_ioctl+0x1e1/0x1350 drivers/block/loop.c:1523
 blkdev_ioctl+0x352/0x440 block/ioctl.c:705
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:584
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:584
 x64_sys_call+0x1816/0x2ff0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 6773 Comm: syz.1.833 Not tainted 6.16.0-syzkaller-11241-g186f3edfdd41 #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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