جزئیات آسیب‌پذیری

In the Linux kernel, the following vulnerability has been resolved: mm/vmalloc: take vmap_purge_lock in shrinker decay_va_pool_node() can be invoked concurrently from two paths: __purge_vmap_area_lazy() when pools are being purged, and the shrinker via vmap_node_shrink_scan(). However, decay_va_pool_node() is not safe to run concurrently, and the shrinker path currently lacks serialization, leading to races and possible leaks. Protect decay_va_pool_node() by taking vmap_purge_lock in the shrinker path to ensure serialization with purge users.

• https://git.kernel.org/stable/c/c15ff206ba78820bf2873d0c668a882e99f4b631
• https://git.kernel.org/stable/c/687ccdf582169cd680aeaf24cc953807c4cd4345
• https://git.kernel.org/stable/c/12f2341b4c235d5593a433abac201c1c6725787f
• https://git.kernel.org/stable/c/ec05f51f1e65bce95528543eb73fda56fd201d94