memcpy() in phy_ConfigBBWithParaFile() and PHY_ConfigRFWithParaFile() is called with "src == NULL && len == 0". This is an undefined behavior. Moreover this if pre-condition "pBufLen && (*pBufLen == 0) && !pBuf" is constantly false because it is a nested if in the else brach, i.e., "if (cond) { ... } else { if (cond) {...} }". This patch alters the if condition to check "pBufLen && pBuf" pointers are not NULL.
Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: Hans de Goede hdegoede@redhat.com Cc: Bastien Nocera hadess@hadess.net Cc: Larry Finger Larry.Finger@lwfinger.net Cc: Jes Sorensen jes.sorensen@gmail.com Cc: stable@vger.kernel.org Signed-off-by: Denis Efremov efremov@linux.com --- Not tested. I don't have the hardware. The fix is based on my guess.
drivers/staging/rtl8723bs/hal/hal_com_phycfg.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/rtl8723bs/hal/hal_com_phycfg.c b/drivers/staging/rtl8723bs/hal/hal_com_phycfg.c index 6539bee9b5ba..0902dc3c1825 100644 --- a/drivers/staging/rtl8723bs/hal/hal_com_phycfg.c +++ b/drivers/staging/rtl8723bs/hal/hal_com_phycfg.c @@ -2320,7 +2320,7 @@ int phy_ConfigBBWithParaFile( } } } else { - if (pBufLen && (*pBufLen == 0) && !pBuf) { + if (pBufLen && pBuf) { memcpy(pHalData->para_file_buf, pBuf, *pBufLen); rtStatus = _SUCCESS; } else @@ -2752,7 +2752,7 @@ int PHY_ConfigRFWithParaFile( } } } else { - if (pBufLen && (*pBufLen == 0) && !pBuf) { + if (pBufLen && pBuf) { memcpy(pHalData->para_file_buf, pBuf, *pBufLen); rtStatus = _SUCCESS; } else