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[ Upstream commit850e088d5b] If we successfully linearize the packet, num_buf will be set to zero which may confuse error handling path which assumes num_buf is at least 1 and this can lead the code tries to pop the descriptor of next buffer. Fixing this by checking num_buf against 1 before decreasing. Fixes:4941d472bf("virtio-net: do not reset during XDP set") Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.