| Message ID | 20230523021228.2406112-1-azeemshaikh38@gmail.com (mailing list archive) |
|---|---|
| State | Mainlined |
| Commit | d6e3896b7c22278c6f4a9b166211fdddf1c86c3a |
| Headers | show |
| Series | leds: blinkm: Replace all non-returning strlcpy with strscpy | expand |
On Tue, May 23, 2023 at 02:12:28AM +0000, Azeem Shaikh wrote: > strlcpy() reads the entire source buffer first. > This read may exceed the destination size limit. > This is both inefficient and can lead to linear read > overflows if a source string is not NUL-terminated [1]. > In an effort to remove strlcpy() completely [2], replace > strlcpy() here with strscpy(). > No return values were used, so direct replacement is safe. > > [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy > [2] https://github.com/KSPP/linux/issues/89 > > Signed-off-by: Azeem Shaikh <azeemshaikh38@gmail.com> Reviewed-by: Kees Cook <keescook@chromium.org>
On Tue, 23 May 2023, Azeem Shaikh wrote: > strlcpy() reads the entire source buffer first. > This read may exceed the destination size limit. > This is both inefficient and can lead to linear read > overflows if a source string is not NUL-terminated [1]. > In an effort to remove strlcpy() completely [2], replace > strlcpy() here with strscpy(). > No return values were used, so direct replacement is safe. > > [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy > [2] https://github.com/KSPP/linux/issues/89 > > Signed-off-by: Azeem Shaikh <azeemshaikh38@gmail.com> > --- > drivers/leds/leds-blinkm.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) Applied, thanks
diff --git a/drivers/leds/leds-blinkm.c b/drivers/leds/leds-blinkm.c index 37f2f32ae42d..8c2ae0798cfc 100644 --- a/drivers/leds/leds-blinkm.c +++ b/drivers/leds/leds-blinkm.c @@ -561,7 +561,7 @@ static int blinkm_detect(struct i2c_client *client, struct i2c_board_info *info) return -ENODEV; } - strlcpy(info->type, "blinkm", I2C_NAME_SIZE); + strscpy(info->type, "blinkm", I2C_NAME_SIZE); return 0; }
strlcpy() reads the entire source buffer first. This read may exceed the destination size limit. This is both inefficient and can lead to linear read overflows if a source string is not NUL-terminated [1]. In an effort to remove strlcpy() completely [2], replace strlcpy() here with strscpy(). No return values were used, so direct replacement is safe. [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy [2] https://github.com/KSPP/linux/issues/89 Signed-off-by: Azeem Shaikh <azeemshaikh38@gmail.com> --- drivers/leds/leds-blinkm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)