6.6-stable review patch. If anyone has any objections, please let me know.
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From: Jiri Olsa jolsa@kernel.org
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: 89ae89f53d20 ("bpf: Add multi uprobe link") Fixes: e420bed02507 ("bpf: Add fd-based tcx multi-prog infra with link support") Fixes: 84601d6ee68a ("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 --- include/linux/bpf_types.h | 3 +++ 1 file changed, 3 insertions(+)
--- a/include/linux/bpf_types.h +++ b/include/linux/bpf_types.h @@ -142,9 +142,12 @@ BPF_LINK_TYPE(BPF_LINK_TYPE_ITER, iter) #ifdef CONFIG_NET BPF_LINK_TYPE(BPF_LINK_TYPE_NETNS, netns) BPF_LINK_TYPE(BPF_LINK_TYPE_XDP, xdp) +BPF_LINK_TYPE(BPF_LINK_TYPE_NETFILTER, netfilter) +BPF_LINK_TYPE(BPF_LINK_TYPE_TCX, tcx) #endif #ifdef CONFIG_PERF_EVENTS BPF_LINK_TYPE(BPF_LINK_TYPE_PERF_EVENT, perf) #endif BPF_LINK_TYPE(BPF_LINK_TYPE_KPROBE_MULTI, kprobe_multi) BPF_LINK_TYPE(BPF_LINK_TYPE_STRUCT_OPS, struct_ops) +BPF_LINK_TYPE(BPF_LINK_TYPE_UPROBE_MULTI, uprobe_multi)