From: Daniel Micay danielmicay@gmail.com
commit 88a5b39b69ab1828fd4130e2baadd184109cea69 upstream.
Noticed by FORTIFY_SOURCE, this swaps memcpy() for strncpy() to zero-value fill the end of the buffer instead of over-reading a string from .rodata.
Signed-off-by: Daniel Micay danielmicay@gmail.com [kees: wrote commit log] Signed-off-by: Kees Cook keescook@chromium.org Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: Wayne Porter wporter82@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Amit Pundir amit.pundir@linaro.org --- To be applied on 4.4.y and 3.18.y as well. Build tested on v4.4.153 and v3.18.120.
drivers/staging/rts5208/rtsx_scsi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/staging/rts5208/rtsx_scsi.c b/drivers/staging/rts5208/rtsx_scsi.c index b3790334fd3f..f50076d0fb6c 100644 --- a/drivers/staging/rts5208/rtsx_scsi.c +++ b/drivers/staging/rts5208/rtsx_scsi.c @@ -536,7 +536,7 @@ static int inquiry(struct scsi_cmnd *srb, struct rtsx_chip *chip)
if (sendbytes > 8) { memcpy(buf, inquiry_buf, 8); - memcpy(buf + 8, inquiry_string, sendbytes - 8); + strncpy(buf + 8, inquiry_string, sendbytes - 8); if (pro_formatter_flag) { /* Additional Length */ buf[4] = 0x33;