جزئیات آسیب‌پذیری

In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: take fl->lock when moving mmaps on interrupted invoke When an invoke is interrupted by a signal, wait_for_completion_interruptible() returns -ERESTARTSYS and fastrpc_internal_invoke() moves every buffer from fl->mmaps onto cctx->invoke_interrupted_mmaps. This list_del()/list_add_tail() walk runs without holding fl->lock, the lock that serialises fl->mmaps in fastrpc_req_mmap() and fastrpc_req_munmap() everywhere else. Take fl->lock around the move, matching every other fl->mmaps accessor.

• https://git.kernel.org/stable/c/3f265e405e5ef85030c3777262e18bb556bc8724
• https://git.kernel.org/stable/c/a902fe1f80f58a2335b6be1131866f827ec44d1a
• https://git.kernel.org/stable/c/af6345159abcbaa550518f31990d2a9558c2d369
• https://git.kernel.org/stable/c/efd02f8d1a7449f15809bc18d3cd41aafea75d7e
• https://git.kernel.org/stable/c/b85a0e91d7d6cd06a53c881a46f749cfcef416a2