In the Linux kernel, the following vulnerability has been resolved: RDMA/bnxt_re: Avoid repeated requests to allocate WC pages Applications can request multiple WC pages for the same ucontext. As of now, only 1 WC page per ucontext is supported. Add a lock to avoid concurrent access and a check to fail repeated requests. Also, if the mmap entry insert fails for the WC, free the Doorbell page index mapped for the WC page.
https://git.kernel.org/stable/c/da406b8b49c1dfe661a497483940d7ee781430db
https://git.kernel.org/stable/c/478c4d24193fe3e6aa2accd4874ae43000e4a217
https://git.kernel.org/stable/c/441baa79043431807115fd030d7d0bb14ed441a0