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[ Upstream commit85102ba58b] A Segmentation fault error is caused when the following command is executed. $ sudo ./samples/bpf/xdp_redirect lo Segmentation fault This command is missing a device <IFNAME|IFINDEX> as an argument, resulting in out-of-bounds access from argv. If the number of devices for the xdp_redirect parameter is not 2, we should report an error and exit. Fixes:24251c2647("samples/bpf: add option for native and skb mode for redirect apps") Signed-off-by: Wang Hai <wanghai38@huawei.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210616042324.314832-1-wanghai38@huawei.com Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
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.