diff options
| author | Zong-Zhe Yang <kevin_yang@realtek.com> | 2022-07-27 09:50:03 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@kernel.org> | 2022-08-09 08:48:08 +0300 |
| commit | 86331c7e0cd819bf0c1d0dcf895e0c90b0aa9a6f (patch) | |
| tree | 7e04fe1c9c499a1f7b8170c99080636bf734221d /drivers/net/wireless/realtek | |
| parent | 79ba1062c459a7afac8cc43649f7377052795c05 (diff) | |
| download | linux-86331c7e0cd819bf0c1d0dcf895e0c90b0aa9a6f.tar.xz | |
wifi: rtw88: phy: fix warning of possible buffer overflow
reported by smatch
phy.c:854 rtw_phy_linear_2_db() error: buffer overflow 'db_invert_table[i]'
8 <= 8 (assuming for loop doesn't break)
However, it seems to be a false alarm because we prevent it originally via
if (linear >= db_invert_table[11][7])
return 96; /* maximum 96 dB */
Still, we adjust the code to be more readable and avoid smatch warning.
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220727065003.28340-5-pkshih@realtek.com
Diffstat (limited to 'drivers/net/wireless/realtek')
| -rw-r--r-- | drivers/net/wireless/realtek/rtw88/phy.c | 21 |
1 files changed, 8 insertions, 13 deletions
diff --git a/drivers/net/wireless/realtek/rtw88/phy.c b/drivers/net/wireless/realtek/rtw88/phy.c index 8982e0c98dac..da1efec0aa85 100644 --- a/drivers/net/wireless/realtek/rtw88/phy.c +++ b/drivers/net/wireless/realtek/rtw88/phy.c @@ -816,23 +816,18 @@ static u8 rtw_phy_linear_2_db(u64 linear) u8 j; u32 dB; - if (linear >= db_invert_table[11][7]) - return 96; /* maximum 96 dB */ - for (i = 0; i < 12; i++) { - if (i <= 2 && (linear << FRAC_BITS) <= db_invert_table[i][7]) - break; - else if (i > 2 && linear <= db_invert_table[i][7]) - break; + for (j = 0; j < 8; j++) { + if (i <= 2 && (linear << FRAC_BITS) <= db_invert_table[i][j]) + goto cnt; + else if (i > 2 && linear <= db_invert_table[i][j]) + goto cnt; + } } - for (j = 0; j < 8; j++) { - if (i <= 2 && (linear << FRAC_BITS) <= db_invert_table[i][j]) - break; - else if (i > 2 && linear <= db_invert_table[i][j]) - break; - } + return 96; /* maximum 96 dB */ +cnt: if (j == 0 && i == 0) goto end; |