CVE-2025-39910: In the Linux kernel, the following vulnerability has been resolved: mm/vmalloc, mm/kasan: respect gfp mask in kasan_pop

A bug in the Linux kernel's KASAN (a memory safety tool) caused memory allocation functions to ignore the caller's gfp_mask (a flag controlling how memory should be allocated), always using GFP_KERNEL instead. This created a mismatch with vmalloc() (virtual memory allocation), which supports GFP_NOFS and GFP_NOIO flags that prevent certain types of I/O operations, and could cause deadlocks when filesystems like XFS tried to allocate memory with these restrictions.