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[ Upstream commit0b9173f468] Bridge packets that are forwarded have skb->dst == NULL and get dropped by the check introduced byb60a77386b(net: make skb_dst_force return true when dst is refcounted). To fix this we check skb_dst() before skb_dst_force(), so we don't drop skb packet with dst == NULL. This holds also for skb at the PRE_ROUTING hook so we remove the second check. Fixes:b60a77386b("net: make skb_dst_force return true when dst is refcounted") Signed-off-by: Marco Oliverio <marco.oliverio@tanaza.com> Signed-off-by: Rocco Folino <rocco.folino@tanaza.com> Acked-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> 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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.