reproduce (this is a W=1 build):
        git checkout e06e6b8001233241eb5b2e2791162f0585f50f4b
        b4 shazam https://lore.kernel.org/r/20260314-bpf-kmalloc-nolock-v1-1-24abf3f75a9f@outlook.com

        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash net/core/