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commit 117211aa739a926e6555cfea883be84bee6f1695 upstream. Pengfei Xu reported [1] Syzkaller/KASAN issue found in bpf_link_show_fdinfo. The reason is missing BPF_LINK_TYPE invocation for uprobe multi link and for several other links, adding that. [1] https://lore.kernel.org/bpf/ZXptoKRSLspnk2ie@xpf.sh.intel.com/ Fixes:89ae89f53d("bpf: Add multi uprobe link") Fixes:e420bed025("bpf: Add fd-based tcx multi-prog infra with link support") Fixes:84601d6ee6("bpf: add bpf_link support for BPF_NETFILTER programs") Fixes: 35dfaad7188c ("netkit, bpf: Add bpf programmable net device") Reported-by: Pengfei Xu <pengfei.xu@intel.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Tested-by: Pengfei Xu <pengfei.xu@intel.com> Acked-by: Hou Tao <houtao1@huawei.com> Link: https://lore.kernel.org/bpf/20231215230502.2769743-1-jolsa@kernel.org Signed-off-by: Ignat Korchagin <ignat@cloudflare.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.