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| author | Toke Høiland-Jørgensen <toke@redhat.com> | 2024-02-06 13:59:22 +0100 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2024-02-06 09:51:26 -0800 |
| commit | 92a871ab9fa59a74d013bc04f321026a057618e7 (patch) | |
| tree | 8e13b5d7d65df829f352e669512badd7f97fb2b5 /tools/bpf/resolve_btfids/main.c | |
| parent | c27aa462aa78ff157fdda222af242e4571803d4a (diff) | |
libbpf: Use OPTS_SET() macro in bpf_xdp_query()
When the feature_flags and xdp_zc_max_segs fields were added to the libbpf
bpf_xdp_query_opts, the code writing them did not use the OPTS_SET() macro.
This causes libbpf to write to those fields unconditionally, which means
that programs compiled against an older version of libbpf (with a smaller
size of the bpf_xdp_query_opts struct) will have its stack corrupted by
libbpf writing out of bounds.
The patch adding the feature_flags field has an early bail out if the
feature_flags field is not part of the opts struct (via the OPTS_HAS)
macro, but the patch adding xdp_zc_max_segs does not. For consistency, this
fix just changes the assignments to both fields to use the OPTS_SET()
macro.
Fixes: 13ce2daa259a ("xsk: add new netlink attribute dedicated for ZC max frags")
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20240206125922.1992815-1-toke@redhat.com
Diffstat (limited to 'tools/bpf/resolve_btfids/main.c')
0 files changed, 0 insertions, 0 deletions