CVE-2025-68212 fs: Fix uninitialized 'offp' in statmount_string()

In the Linux kernel, the following vulnerability has been resolved: fs: Fix uninitialized 'offp' in statmountstring In statmountstring, most flags assign an output offset pointer offp which is later updated with the string offset. However, the STATMOUNTMNTUIDMAP and STATMOUNTMNTGIDMAP cases...