5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Shengzhuo Wei commit d8efd84f49379ed28624098821f80e992657d935 upstream. The PDR_INTERFACE_LIST loop only checks that the record start is within the entry before reading an entire struct exp_if from it. A truncated trailing record makes the if_id/variant reads cross the entry boundary into the heap beyond the EEPROM buffer (verified with a KASAN reproducer of the loop). The variant also feeds the synth front-end selection, so this is not only a leak. Advance only while a full record still fits in the entry. Fixes: eff1a59c48e3 ("[P54]: add mac80211-based driver for prism54 softmac hardware") Cc: stable@vger.kernel.org Acked-by: Christian Lamparter Assisted-by: GLM:5.3 Signed-off-by: Shengzhuo Wei Link: https://patch.msgid.link/20260831-p54-pda-validation-v2-2-dae566b388c8@cherr.cc Signed-off-by: Johannes Berg Signed-off-by: Greg Kroah-Hartman --- drivers/net/wireless/intersil/p54/eeprom.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/net/wireless/intersil/p54/eeprom.c +++ b/drivers/net/wireless/intersil/p54/eeprom.c @@ -816,7 +816,8 @@ int p54_parse_eeprom(struct ieee80211_hw break; case PDR_INTERFACE_LIST: tmp = entry->data; - while ((u8 *)tmp < entry->data + data_len) { + while ((u8 *)tmp + sizeof(struct exp_if) <= + entry->data + data_len) { struct exp_if *exp_if = tmp; if (exp_if->if_id == cpu_to_le16(IF_ID_ISL39000)) synth = le16_to_cpu(exp_if->variant);