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author | Justin Stitt <justinstitt@google.com> | 2023-09-22 18:27:17 +0300 |
---|---|---|
committer | Lee Jones <lee@kernel.org> | 2023-11-01 14:28:52 +0300 |
commit | a337ee0d25ba24212269c2442981dc4fb5232a8c (patch) | |
tree | 1bac203e50101a30fc86e99cbac74748b9edd384 | |
parent | ff50f53276131a3059e8307d11293af388ed2bcd (diff) | |
download | linux-a337ee0d25ba24212269c2442981dc4fb5232a8c.tar.xz |
leds: lp3952: Replace deprecated strncpy with strscpy
`strncpy` is deprecated for use on NUL-terminated destination strings
[1] and as such we should prefer more robust and less ambiguous string
interfaces.
We expect `dest` to be NUL-terminated due to its use with dev_err.
lp3952_get_label()'s dest argument is priv->leds[i].name:
| acpi_ret = lp3952_get_label(&priv->client->dev, led_name_hdl[i],
| priv->leds[i].name);
... which is then assigned to:
| priv->leds[i].cdev.name = priv->leds[i].name;
... which is used with a format string
| dev_err(&priv->client->dev,
| "couldn't register LED %s\n",
| priv->leds[i].cdev.name);
There is no indication that NUL-padding is required but if it is let's
opt for strscpy_pad.
Considering the above, a suitable replacement is `strscpy` [2] due to
the fact that it guarantees NUL-termination on the destination buffer
without unnecessarily NUL-padding.
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 [2]
Link: https://github.com/KSPP/linux/issues/90
Signed-off-by: Justin Stitt <justinstitt@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230922-strncpy-drivers-leds-leds-lp3952-c-v1-1-4941d6f60ca4@google.com
Signed-off-by: Lee Jones <lee@kernel.org>
-rw-r--r-- | drivers/leds/leds-lp3952.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/leds/leds-lp3952.c b/drivers/leds/leds-lp3952.c index 3bd55652a706..62ade3f05a87 100644 --- a/drivers/leds/leds-lp3952.c +++ b/drivers/leds/leds-lp3952.c @@ -101,7 +101,7 @@ static int lp3952_get_label(struct device *dev, const char *label, char *dest) if (ret) return ret; - strncpy(dest, str, LP3952_LABEL_MAX_LEN); + strscpy(dest, str, LP3952_LABEL_MAX_LEN); return 0; } |