Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-25 05:32:00 +00:00
Code Issues Packages Projects Releases Wiki Activity

video: hdmi: prefer length specifier in format over string copying

Browse Source 
strncpy() is deprecated for use on NUL-terminated destination strings
[1] and as such we should prefer more robust and less ambiguous string
interfaces.

It looks like the main use of strncpy() here is to limit the amount of
bytes printed from hdmi_log() by using a tmp buffer and limiting the
number of bytes copied. Really, we should use the %.<len>s format
qualifier to achieve this.

Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [1]
Link: https://manpages.debian.org/testing/linux-manual-4.8/strscpy.9.en.html
Link: https://github.com/KSPP/linux/issues/90
Cc: linux-hardening@vger.kernel.org
Signed-off-by: Justin Stitt <justinstitt@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Justin Stitt 2024-03-20 23:22:02 +00:00 committed by Helge Deller
parent 91bcea421e
commit 5317797e9c
1 changed files with 2 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/video/hdmi.c
View File

@ -1310,17 +1310,11 @@ static void hdmi_spd_infoframe_log(const char *level,
struct device *dev,
const struct hdmi_spd_infoframe *frame)
{
u8 buf[17];
hdmi_infoframe_log_header(level, dev,
(const struct hdmi_any_infoframe *)frame);
memset(buf, 0, sizeof(buf));
strncpy(buf, frame->vendor, 8);
hdmi_log(" vendor: %s\n", buf);
strncpy(buf, frame->product, 16);
hdmi_log(" product: %s\n", buf);
hdmi_log(" vendor: %.8s\n", frame->vendor);
hdmi_log(" product: %.16s\n", frame->product);
hdmi_log(" source device information: %s (0x%x)\n",
hdmi_spd_sdi_get_name(frame->sdi), frame->sdi);
}