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The SKB_DROP_REASON_IP_INADDRERRORS drop reason is never returned from any function, as such it cannot be returned from the ip_route_input call tree. The 'reason != SKB_DROP_REASON_IP_INADDRERRORS' conditional is thus always true. Looking back at history, commit50038bf38e("net: ip: make ip_route_input() return drop reasons") changed the ip_route_input returned value check in br_nf_pre_routing_finish from -EHOSTUNREACH to SKB_DROP_REASON_IP_INADDRERRORS. It turns out -EHOSTUNREACH could not be returned either from the ip_route_input call tree and this since commit251da41301("ipv4: Cache ip_error() routes even when not forwarding."). Not a fix as this won't change the behavior. While at it use kfree_skb_reason. Signed-off-by: Antoine Tenart <atenart@kernel.org> Reviewed-by: Simon Horman <horms@kernel.org> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.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.