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| author | Felix Fietkau <nbd@nbd.name> | 2021-07-12 13:31:04 +0200 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2021-07-12 13:34:08 +0200 |
| commit | 8f7e6db23045b9b4831d10c5bdf29d514a3753c9 (patch) | |
| tree | 48af862d39933461a372e6160ec13f77a1128cee | |
| parent | da2c244e8c9f30e4fc5bf77f0800d685e35d1888 (diff) | |
| download | upstream-8f7e6db23045b9b4831d10c5bdf29d514a3753c9.tar.gz upstream-8f7e6db23045b9b4831d10c5bdf29d514a3753c9.tar.bz2 upstream-8f7e6db23045b9b4831d10c5bdf29d514a3753c9.zip | |
hostapd: fix uninitialized stack variable on CSA
Signed-off-by: Felix Fietkau <nbd@nbd.name>
| -rw-r--r-- | package/network/services/hostapd/patches/022-hostapd-fix-use-of-uninitialized-stack-variables.patch | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/package/network/services/hostapd/patches/022-hostapd-fix-use-of-uninitialized-stack-variables.patch b/package/network/services/hostapd/patches/022-hostapd-fix-use-of-uninitialized-stack-variables.patch new file mode 100644 index 0000000000..c7da33f029 --- /dev/null +++ b/package/network/services/hostapd/patches/022-hostapd-fix-use-of-uninitialized-stack-variables.patch @@ -0,0 +1,25 @@ +From: Felix Fietkau <nbd@nbd.name> +Date: Thu, 8 Jul 2021 16:33:03 +0200 +Subject: [PATCH] hostapd: fix use of uninitialized stack variables + +When a CSA is performed on an 80 MHz channel, hostapd_change_config_freq +unconditionally calls hostapd_set_oper_centr_freq_seg0/1_idx with seg0/1 +filled by ieee80211_freq_to_chan. +However, if ieee80211_freq_to_chan fails (because the freq is 0 or invalid), +seg0/1 remains uninitialized and filled with stack garbage, causing errors +such as "hostapd: 80 MHz: center segment 1 configured" + +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- + +--- a/src/ap/hostapd.c ++++ b/src/ap/hostapd.c +@@ -3431,7 +3431,7 @@ static int hostapd_change_config_freq(st + struct hostapd_freq_params *old_params) + { + int channel; +- u8 seg0, seg1; ++ u8 seg0 = 0, seg1 = 0; + struct hostapd_hw_modes *mode; + + if (!params->channel) { |