6.6-stable review patch. If anyone has any objections, please let me know.
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From: Kees Cook kees@kernel.org
[ Upstream commit a37192c432adaec9e8ef29e4ddb319ea2f443aa6 ]
While I caught the need for setting cnt early in nl80211_parse_rnr_elems() in the original annotation of struct cfg80211_rnr_elems with __counted_by, I missed a similar pattern in ieee80211_copy_rnr_beacon(). Fix this by moving the cnt assignment to before the loop.
Fixes: 7b6d7087031b ("wifi: cfg80211: Annotate struct cfg80211_rnr_elems with __counted_by") Signed-off-by: Kees Cook kees@kernel.org Reviewed-by: Gustavo A. R. Silva gustavoars@kernel.org Link: https://patch.msgid.link/20250721182521.work.540-kees@kernel.org Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/mac80211/cfg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index a3c5d4d995db..3ff7f38394a6 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -1099,13 +1099,13 @@ ieee80211_copy_rnr_beacon(u8 *pos, struct cfg80211_rnr_elems *dst, { int i, offset = 0;
+ dst->cnt = src->cnt; for (i = 0; i < src->cnt; i++) { memcpy(pos + offset, src->elem[i].data, src->elem[i].len); dst->elem[i].len = src->elem[i].len; dst->elem[i].data = pos + offset; offset += dst->elem[i].len; } - dst->cnt = src->cnt;
return offset; }