CVE-2025-40126

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> sparc: fix accurate exception reporting in copy_{from_to}_user for UltraSPARC<br /> <br /> The referenced commit introduced exception handlers on user-space memory<br /> references in copy_from_user and copy_to_user. These handlers return from<br /> the respective function and calculate the remaining bytes left to copy<br /> using the current register contents. This commit fixes a couple of bad<br /> calculations. This will fix the return value of copy_from_user and<br /> copy_to_user in the faulting case. The behaviour of memcpy stays unchanged.