From 3d28c466317b9515810a1f5ec29be394269bcb73 Mon Sep 17 00:00:00 2001 From: Justin Stitt Date: Mon, 7 Aug 2023 17:49:28 +0000 Subject: [PATCH] ALSA: hda/tegra: refactor deprecated strncpy `strncpy` is deprecated for use on NUL-terminated destination strings [1]. A suitable replacement is `strscpy` [2] due to the fact that it guarantees NUL-termination on its destination buffer argument which is _not_ the case for `strncpy`! It should be noted that the current implementation is unlikely to have a bug because `drv_name` is a string literal with a size of 9 while `card->driver` has a size of 16. However, it is probably worthwhile to switch to a more robust and less ambiguous interface. [1]: www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [2]: 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 Link: https://lore.kernel.org/r/20230807-sound-pci-hda-v1-1-6d9cdcd085ca@google.com Signed-off-by: Takashi Iwai --- sound/pci/hda/hda_tegra.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sound/pci/hda/hda_tegra.c b/sound/pci/hda/hda_tegra.c index 39fa036..d967e70 100644 --- a/sound/pci/hda/hda_tegra.c +++ b/sound/pci/hda/hda_tegra.c @@ -379,14 +379,14 @@ static int hda_tegra_first_init(struct azx *chip, struct platform_device *pdev) } /* driver name */ - strncpy(card->driver, drv_name, sizeof(card->driver)); + strscpy(card->driver, drv_name, sizeof(card->driver)); /* shortname for card */ sname = of_get_property(np, "nvidia,model", NULL); if (!sname) sname = drv_name; if (strlen(sname) > sizeof(card->shortname)) dev_info(card->dev, "truncating shortname for card\n"); - strncpy(card->shortname, sname, sizeof(card->shortname)); + strscpy(card->shortname, sname, sizeof(card->shortname)); /* longname for card */ snprintf(card->longname, sizeof(card->longname), -- 2.7.4