4a0ec2aa07
In commit3f27fb2321("ipv6: addrconf: add per netns perturbation in inet6_addr_hash()"), I added net_hash_mix() in inet6_addr_hash() to get better hash dispersion, at a time all netns were sharing the hash table. Since then, commit21a216a8fc("ipv6/addrconf: allocate a per netns hash table") made the hash table per netns. We could remove the net_hash_mix() from inet6_addr_hash(), but there is still an issue with ipv6_addr_hash(). It is highly predictable and a malicious user can easily create thousands of IPv6 addresses all stored in the same hash bucket. Switch to __ipv6_addr_jhash(). We could use a dedicated secret, or reuse net_hash_mix() as I did in this patch. Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com> Link: https://patch.msgid.link/20241008120101.734521-1-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@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 reStructuredText 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.