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[ Upstream commit624085a31c] First problem is that optlen is fetched without checking there is more than one byte to parse. Fix this by taking care of IPV6_TLV_PAD1 before fetching optlen (under appropriate sanity checks against len) Second problem is that IPV6_TLV_PADN checks of zero padding are performed before the check of remaining length. Fixes:1da177e4c3("Linux-2.6.12-rc2") Fixes:c1412fce7e("net/ipv6/exthdrs.c: Strict PadN option checking") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Paolo Abeni <pabeni@redhat.com> Cc: Tom Herbert <tom@herbertland.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.