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[ Upstream commit9371937092] The "opt" variable is unsigned long but we only copy 4 bytes from the user so the lower 4 bytes are uninitialized. I have changed the integer overflow checks from ULONG to UINT as well. This is a slight API change but I don't expect it to break anything. Fixes:a7b75c5a8c("net: pass a sockptr_t into ->setsockopt") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net> 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.