From d0ce2d170585b7061a08af061d64ebb08c6782dd Mon Sep 17 00:00:00 2001 From: Vasanthakumar Thiagarajan Date: Tue, 21 Dec 2010 01:42:43 -0800 Subject: [PATCH] ath9k_hw: Fix bug in eeprom data length validation for AR9485 The size of the eeprom data is 1088 bytes for AR9485. But a sanity check is done against 4K which would result in a 'potential read past the end of the buffer' smatch complaint. Reported-by: Dan Carpenter Signed-off-by: Vasanthakumar Thiagarajan Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath9k/ar9003_eeprom.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c index d7deae85d98..5d81c5360b9 100644 --- a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c +++ b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c @@ -59,6 +59,8 @@ #define CTL(_tpower, _flag) ((_tpower) | ((_flag) << 6)) +#define EEPROM_DATA_LEN_9485 1088 + static int ar9003_hw_power_interpolate(int32_t x, int32_t *px, int32_t *py, u_int16_t np); @@ -3367,7 +3369,7 @@ found: "Found block at %x: code=%d ref=%d length=%d major=%d minor=%d\n", cptr, code, reference, length, major, minor); if ((!AR_SREV_9485(ah) && length >= 1024) || - (AR_SREV_9485(ah) && length >= (4 * 1024))) { + (AR_SREV_9485(ah) && length > EEPROM_DATA_LEN_9485)) { ath_dbg(common, ATH_DBG_EEPROM, "Skipping bad header\n"); cptr -= COMP_HDR_LEN; -- 2.46.0