Re: [PATCH v3] bootconfig: use memblock_free_late to free xbc memory to buddy

On Sun, 14 Apr 2024 19:49:45 +0800 qiang4.zh...@linux.intel.com wrote: > From: Qiang Zhang > > On the time to free xbc memory in xbc_exit(), memblock may has handed > over memory to buddy allocator. So it doesn't make sense to free memory > back to memblock. memblock_free() called by xbc_exit()

[PATCH v3] bootconfig: use memblock_free_late to free xbc memory to buddy

From: Qiang Zhang On the time to free xbc memory in xbc_exit(), memblock may has handed over memory to buddy allocator. So it doesn't make sense to free memory back to memblock. memblock_free() called by xbc_exit() even causes UAF bugs on architectures with CONFIG_ARCH_KEEP_MEMBLOCK disabled