==================================================================
BUG: KCSAN: data-race in blkdev_open / queue_limits_commit_update

read to 0xffff8881033f39b8 of 4 bytes by task 7756 on cpu 1:
 bdev_can_atomic_write include/linux/blkdev.h:1841 [inline]
 blkdev_open+0x161/0x290 block/fops.c:693
 do_dentry_open+0x54b/0xa60 fs/open.c:962
 vfs_open+0x37/0x1e0 fs/open.c:1094
 do_open fs/namei.c:4637 [inline]
 path_openat+0x1de9/0x23c0 fs/namei.c:4796
 do_filp_open+0x15d/0x280 fs/namei.c:4823
 do_sys_openat2+0xa6/0x150 fs/open.c:1430
 do_sys_open fs/open.c:1436 [inline]
 __do_sys_openat fs/open.c:1452 [inline]
 __se_sys_openat fs/open.c:1447 [inline]
 __x64_sys_openat+0xf2/0x120 fs/open.c:1447
 x64_sys_call+0x2b07/0x3000 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xc0/0x2a0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

write to 0xffff8881033f3928 of 192 bytes by task 14863 on cpu 0:
 queue_limits_commit_update+0x4b/0x160 block/blk-settings.c:577
 loop_configure+0x78c/0x9c0 drivers/block/loop.c:1065
 lo_ioctl+0x1e1/0x13a0 drivers/block/loop.c:1555
 blkdev_ioctl+0x387/0x460 block/ioctl.c:792
 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+0xc0/0x2a0 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: 14863 Comm: syz.0.2166 Tainted: G        W           syzkaller #0 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
==================================================================
loop0: detected capacity change from 0 to 1024
EXT4-fs: Quota format mount options ignored when QUOTA feature is enabled
EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 overlaps block group descriptors
EXT4-fs (loop0): ext4_check_descriptors: Checksum for group 0 failed (14919!=20869)
EXT4-fs (loop0): stripe (65535) is not aligned with cluster size (16), stripe is disabled
EXT4-fs (loop0): invalid journal inode
EXT4-fs (loop0): can't get journal size
EXT4-fs error (device loop0): ext4_protect_reserved_inode:182: inode #3: comm syz.0.2166: blocks 2-2 from inode overlap system zone
EXT4-fs (loop0): failed to initialize system zone (-117)
EXT4-fs (loop0): mount failed