In the Linux kernel, the following vulnerability has been resolved: ubifs: skip dumping tnc tree when zroot is null Clearing slab cache will free all znode in memory and make c->zroot.znode = NULL, then dumping tnc tree will access c->zroot.znode which cause null pointer dereference.
https://git.kernel.org/stable/c/e01b55f261ccc96e347eba4931e4429d080d879d
https://git.kernel.org/stable/c/bdb0ca39e0acccf6771db49c3f94ed787d05f2d7
https://git.kernel.org/stable/c/77e5266e3d3faa6bdcf20d9c68a8972f6aa06522
https://git.kernel.org/stable/c/40e25a3c0063935763717877bb2a814c081509ff
https://git.kernel.org/stable/c/2a987950df825d0144370e700dc5fb337684ffba