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wifi: mac80211: init cnt before accessing elem in ieee80211_copy_mbssid_beacon

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With the new __counted_by annocation in cfg80211_mbssid_elems,
the "cnt" struct member must be set before accessing the "elem"
array. Failing to do so will trigger a runtime warning when enabling
CONFIG_UBSAN_BOUNDS and CONFIG_FORTIFY_SOURCE.

Fixes: c14679d700 ("wifi: cfg80211: Annotate struct cfg80211_mbssid_elems with __counted_by")
Signed-off-by: Haoyu Li <lihaoyu499@gmail.com>
Link: https://patch.msgid.link/20241123172500.311853-1-lihaoyu499@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Haoyu Li
2024-11-24 01:25:00 +08:00
committed by Johannes Berg
parent 49dba1ded8
commit 496db69fd8
1 changed files with 1 additions and 1 deletions
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net/mac80211/cfg.c
+1 -1
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@@ -1088,13 +1088,13 @@ ieee80211_copy_mbssid_beacon(u8 *pos, struct cfg80211_mbssid_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;
}