EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000.
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BUG: KCSAN: data-race in blkdev_open / queue_limits_commit_update

read to 0xffff8881021984bc of 4 bytes by task 3308 on cpu 1:
 bdev_can_atomic_write include/linux/blkdev.h:1763 [inline]
 blkdev_open+0x161/0x290 block/fops.c:649
 do_dentry_open+0x646/0xa20 fs/open.c:956
 vfs_open+0x37/0x1e0 fs/open.c:1086
 do_open fs/namei.c:3880 [inline]
 path_openat+0x1c5e/0x2170 fs/namei.c:4039
 do_filp_open+0x109/0x230 fs/namei.c:4066
 do_sys_openat2+0xa6/0x110 fs/open.c:1429
 do_sys_open fs/open.c:1444 [inline]
 __do_sys_openat fs/open.c:1460 [inline]
 __se_sys_openat fs/open.c:1455 [inline]
 __x64_sys_openat+0xf2/0x120 fs/open.c:1455
 x64_sys_call+0x1af/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd0/0x1a0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

write to 0xffff888102198438 of 176 bytes by task 3325 on cpu 0:
 queue_limits_commit_update+0x4c/0x110 block/blk-settings.c:461
 __loop_clr_fd drivers/block/loop.c:1106 [inline]
 lo_release+0x1e9/0x400 drivers/block/loop.c:1696
 bdev_release+0x370/0x3d0 block/bdev.c:-1
 blkdev_release+0x15/0x20 block/fops.c:660
 __fput+0x298/0x650 fs/file_table.c:465
 fput_close_sync+0x6e/0x120 fs/file_table.c:570
 __do_sys_close fs/open.c:1581 [inline]
 __se_sys_close fs/open.c:1566 [inline]
 __x64_sys_close+0x56/0xf0 fs/open.c:1566
 x64_sys_call+0x2747/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:4
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd0/0x1a0 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: 3325 Comm: syz-executor Not tainted 6.15.0-rc5-syzkaller-00136-g9c69f8884904 #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
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