diff options
| author | Mikhail Lobanov <m.lobanov@rosa.ru> | 2025-03-17 13:31:37 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-08-28 16:24:39 +0200 |
| commit | e442a966e2b7c6234f7a6cafbed0b16caca8a317 (patch) | |
| tree | c362ec2f42d9f1f469b316d2f6ca340511e593a3 | |
| parent | 82ef97abf22790182f7d433c74960dfd61b99c33 (diff) | |
wifi: mac80211: check basic rates validity in sta_link_apply_parameters
commit 16ee3ea8faef8ff042acc15867a6c458c573de61 upstream.
When userspace sets supported rates for a new station via
NL80211_CMD_NEW_STATION, it might send a list that's empty
or contains only invalid values. Currently, we process these
values in sta_link_apply_parameters() without checking the result of
ieee80211_parse_bitrates(), which can lead to an empty rates bitmap.
A similar issue was addressed for NL80211_CMD_SET_BSS in commit
ce04abc3fcc6 ("wifi: mac80211: check basic rates validity").
This patch applies the same approach in sta_link_apply_parameters()
for NL80211_CMD_NEW_STATION, ensuring there is at least one valid
rate by inspecting the result of ieee80211_parse_bitrates().
Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
Fixes: b95eb7f0eee4 ("wifi: cfg80211/mac80211: separate link params from station params")
Signed-off-by: Mikhail Lobanov <m.lobanov@rosa.ru>
Link: https://patch.msgid.link/20250317103139.17625-1-m.lobanov@rosa.ru
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
[ Summary of conflict resolutions:
- Function ieee80211_parse_bitrates() takes channel width as its
first parameter in mainline kernel version. In v5.15 the function
takes the whole chandef struct as its first parameter.
- The same function takes link station parameters as its last
parameter, and in v5.15 they are in a struct called sta,
instead of a struct called link_sta. ]
Signed-off-by: Hanne-Lotta Mäenpää <hannelotta@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/mac80211/cfg.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 2b77cb290788..706ff67f4254 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -1658,12 +1658,13 @@ static int sta_apply_parameters(struct ieee80211_local *local, return ret; } - if (params->supported_rates && params->supported_rates_len) { - ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef, - sband, params->supported_rates, - params->supported_rates_len, - &sta->sta.supp_rates[sband->band]); - } + if (params->supported_rates && + params->supported_rates_len && + !ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef, + sband, params->supported_rates, + params->supported_rates_len, + &sta->sta.supp_rates[sband->band])) + return -EINVAL; if (params->ht_capa) ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, |