================================================================== BUG: KCSAN: data-race in bdev_statx / queue_limits_commit_update read to 0xffff88810219a0c0 of 4 bytes by task 4348 on cpu 1: queue_io_min include/linux/blkdev.h:1414 [inline] bdev_io_min include/linux/blkdev.h:1419 [inline] bdev_statx+0x295/0x2d0 block/bdev.c:1350 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:551 [inline] __se_sys_newfstat+0x96/0x460 fs/stat.c:546 __x64_sys_newfstat+0x31/0x40 fs/stat.c:546 x64_sys_call+0x2773/0x3020 arch/x86/include/generated/asm/syscalls_64.h:6 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x12c/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f write to 0xffff88810219a080 of 192 bytes by task 6224 on cpu 0: queue_limits_commit_update+0x4b/0x160 block/blk-settings.c:564 loop_configure+0x78c/0x9c0 drivers/block/loop.c:1064 lo_ioctl+0x1e1/0x13a0 drivers/block/loop.c:1534 blkdev_ioctl+0x387/0x460 block/ioctl.c:797 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+0x1563/0x3020 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x12c/0x3b0 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: 6224 Comm: syz.1.766 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 ================================================================== loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): Cannot turn on journaled quota: type 0: error -2 EXT4-fs (loop1): Cannot turn on journaled quota: type 1: error -2 EXT4-fs (loop1): 1 truncate cleaned up EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=10723 sclass=netlink_route_socket pid=6224 comm=syz.1.766