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staging: rtl8712: Replace snprintf with scnprintf 

When the number of bytes to be printed exceeds the limit snprintf
returns the number of bytes that would have been printed (if there was
no truncation). This might cause issues, hence use scnprintf which
returns the actual number of bytes printed to buffer always.

Signed-off-by: Rohit Sarkar <rohitsarkar5398@gmail.com>
Link: https://lore.kernel.org/r/20190910184931.GA8228@SARKAR
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rohit Sarkar 2019-09-11 00:19:31 +05:30 committed by Greg Kroah-Hartman
parent e40219d5e4
commit d9dc93128d
1 changed files with 2 additions and 2 deletions
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4
drivers/staging/rtl8712/rtl871x_ioctl_linux.c
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@ -142,7 +142,7 @@ static noinline_for_stack char *translate_scan_wpa(struct iw_request_info *info,
memset(buf, 0, MAX_WPA_IE_LEN);
n = sprintf(buf, "wpa_ie=");
for (i = 0; i < wpa_len; i++) {
n += snprintf(buf + n, MAX_WPA_IE_LEN - n,
n += scnprintf(buf + n, MAX_WPA_IE_LEN - n,
"%02x", wpa_ie[i]);
if (n >= MAX_WPA_IE_LEN)
break;
@ -162,7 +162,7 @@ static noinline_for_stack char *translate_scan_wpa(struct iw_request_info *info,
memset(buf, 0, MAX_WPA_IE_LEN);
n = sprintf(buf, "rsn_ie=");
for (i = 0; i < rsn_len; i++) {
n += snprintf(buf + n, MAX_WPA_IE_LEN - n,
n += scnprintf(buf + n, MAX_WPA_IE_LEN - n,
"%02x", rsn_ie[i]);
if (n >= MAX_WPA_IE_LEN)
break;