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| author |   Takashi Iwai <tiwai@suse.de> | 2020-03-11 10:24:50 +0100 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-03-12 09:23:59 +0100 |
| commit | 39ddadf14da77c5c7176e0395db5f832b7da06c0 (patch) | |
| tree | d8b998139dcc660caf3d581b5ea0ab04cb1f46a2 /drivers/staging/rtl8192e | |
| parent | staging: rtl8188eu: Use scnprintf() for avoiding potential buffer overflow (diff) | |
| download | linux-dev-39ddadf14da77c5c7176e0395db5f832b7da06c0.tar.xz linux-dev-39ddadf14da77c5c7176e0395db5f832b7da06c0.zip | |
staging: rtl8192e: Use scnprintf() for avoiding potential buffer overflow
Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit. Fix it by replacing with scnprintf().
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20200311092451.23933-3-tiwai@suse.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/rtl8192e')
| -rw-r--r-- | drivers/staging/rtl8192e/rtllib_rx.c | 4 | ||||
| -rw-r--r-- | drivers/staging/rtl8192e/rtllib_wx.c | 8 |
2 files changed, 6 insertions, 6 deletions
diff --git a/drivers/staging/rtl8192e/rtllib_rx.c b/drivers/staging/rtl8192e/rtllib_rx.c index 0bae0a0a4cbe..d31b5e1c8df4 100644 --- a/drivers/staging/rtl8192e/rtllib_rx.c +++ b/drivers/staging/rtl8192e/rtllib_rx.c @@ -2092,7 +2092,7 @@ int rtllib_parse_info_param(struct rtllib_device *ieee, MAX_RATES_LENGTH); for (i = 0; i < network->rates_len; i++) { network->rates[i] = info_element->data[i]; - p += snprintf(p, sizeof(rates_str) - + p += scnprintf(p, sizeof(rates_str) - (p - rates_str), "%02X ", network->rates[i]); if (rtllib_is_ofdm_rate @@ -2120,7 +2120,7 @@ int rtllib_parse_info_param(struct rtllib_device *ieee, MAX_RATES_EX_LENGTH); for (i = 0; i < network->rates_ex_len; i++) { network->rates_ex[i] = info_element->data[i]; - p += snprintf(p, sizeof(rates_str) - + p += scnprintf(p, sizeof(rates_str) - (p - rates_str), "%02X ", network->rates_ex[i]); if (rtllib_is_ofdm_rate diff --git a/drivers/staging/rtl8192e/rtllib_wx.c b/drivers/staging/rtl8192e/rtllib_wx.c index beb40967936a..7e7df50164fb 100644 --- a/drivers/staging/rtl8192e/rtllib_wx.c +++ b/drivers/staging/rtl8192e/rtllib_wx.c @@ -114,7 +114,7 @@ static inline char *rtl819x_translate_scan(struct rtllib_device *ieee, /* Add basic and extended rates */ max_rate = 0; p = custom; - p += snprintf(p, MAX_CUSTOM_LEN - (p - custom), " Rates (Mb/s): "); + p += scnprintf(p, MAX_CUSTOM_LEN - (p - custom), " Rates (Mb/s): "); for (i = 0, j = 0; i < network->rates_len;) { if (j < network->rates_ex_len && ((network->rates_ex[j] & 0x7F) < @@ -124,12 +124,12 @@ static inline char *rtl819x_translate_scan(struct rtllib_device *ieee, rate = network->rates[i++] & 0x7F; if (rate > max_rate) max_rate = rate; - p += snprintf(p, MAX_CUSTOM_LEN - (p - custom), + p += scnprintf(p, MAX_CUSTOM_LEN - (p - custom), "%d%s ", rate >> 1, (rate & 1) ? ".5" : ""); } for (; j < network->rates_ex_len; j++) { rate = network->rates_ex[j] & 0x7F; - p += snprintf(p, MAX_CUSTOM_LEN - (p - custom), + p += scnprintf(p, MAX_CUSTOM_LEN - (p - custom), "%d%s ", rate >> 1, (rate & 1) ? ".5" : ""); if (rate > max_rate) max_rate = rate; @@ -226,7 +226,7 @@ static inline char *rtl819x_translate_scan(struct rtllib_device *ieee, */ iwe.cmd = IWEVCUSTOM; p = custom; - p += snprintf(p, MAX_CUSTOM_LEN - (p - custom), + p += scnprintf(p, MAX_CUSTOM_LEN - (p - custom), " Last beacon: %lums ago", (jiffies - network->last_scanned) / (HZ / 100)); iwe.u.data.length = p - custom; |