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| author | Jiri Slaby <jslaby@suse.cz> | 2013-02-07 17:44:40 +0400 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2013-02-08 23:51:35 +0400 |
| commit | c5e534e569fd07991d4d09921c73823cd5e4115e (patch) | |
| tree | 622101388098cd26f07b1a576291bdb988957916 /drivers/net/wireless/ath/ath5k/phy.c | |
| parent | 957f4aca5fa0db69635271bc4621cc0b65b2d590 (diff) | |
| download | linux-c5e534e569fd07991d4d09921c73823cd5e4115e.tar.xz | |
NET: ath5k, check ath5k_eeprom_mode_from_channel retval
It can, if invalid argument given, return a negative value. In that
case we would access arrays out-of-bounds and such. Check the value
and yell loudly if that happened as it would be a bug in the
implementation. (Instead of silently corrupting memory.)
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Nick Kossifidis <mickflemm@gmail.com>
Cc: "Luis R. Rodriguez" <mcgrof@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath/ath5k/phy.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath5k/phy.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath5k/phy.c b/drivers/net/wireless/ath/ath5k/phy.c index ab363f34b4df..a78afa98c650 100644 --- a/drivers/net/wireless/ath/ath5k/phy.c +++ b/drivers/net/wireless/ath/ath5k/phy.c @@ -1613,6 +1613,10 @@ ath5k_hw_update_noise_floor(struct ath5k_hw *ah) ah->ah_cal_mask |= AR5K_CALIBRATION_NF; ee_mode = ath5k_eeprom_mode_from_channel(ah->ah_current_channel); + if (WARN_ON(ee_mode < 0)) { + ah->ah_cal_mask &= ~AR5K_CALIBRATION_NF; + return; + } /* completed NF calibration, test threshold */ nf = ath5k_hw_read_measured_noise_floor(ah); |