================================================================== BUG: KCSAN: data-race in blkdev_open / queue_limits_commit_update read to 0xffff888102378c78 of 4 bytes by task 3296 on cpu 0: bdev_can_atomic_write include/linux/blkdev.h:1847 [inline] blkdev_open+0x161/0x290 block/fops.c:688 do_dentry_open+0x646/0xa20 fs/open.c:965 vfs_open+0x37/0x1e0 fs/open.c:1095 do_open fs/namei.c:3887 [inline] path_openat+0x1c5e/0x2170 fs/namei.c:4046 do_filp_open+0x109/0x230 fs/namei.c:4073 do_sys_openat2+0xa6/0x110 fs/open.c:1435 do_sys_open fs/open.c:1450 [inline] __do_sys_openat fs/open.c:1466 [inline] __se_sys_openat fs/open.c:1461 [inline] __x64_sys_openat+0xf2/0x120 fs/open.c:1461 x64_sys_call+0x2e9c/0x2ff0 arch/x86/include/generated/asm/syscalls_64.h:258 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 0xffff888102378be8 of 192 bytes by task 10880 on cpu 1: queue_limits_commit_update+0x4b/0x160 block/blk-settings.c:525 __loop_clr_fd drivers/block/loop.c:1139 [inline] lo_release+0x1e9/0x400 drivers/block/loop.c:1749 bdev_release+0x370/0x3d0 block/bdev.c:-1 blkdev_release+0x15/0x20 block/fops.c:699 __fput+0x298/0x650 fs/file_table.c:468 fput_close_sync+0x6e/0x120 fs/file_table.c:573 __do_sys_close fs/open.c:1587 [inline] __se_sys_close fs/open.c:1572 [inline] __x64_sys_close+0x56/0xf0 fs/open.c:1572 x64_sys_call+0x2738/0x2ff0 arch/x86/include/generated/asm/syscalls_64.h:4 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: 10880 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 ==================================================================