| Message ID | 20230522155149.2336620-1-azeemshaikh38@gmail.com (mailing list archive) |
|---|---|
| State | Mainlined |
| Commit | 576f0d7a8ad3219a35d06a297005cc1aa14ae96f |
| Headers | show |
| Series | drm/rockchip: Replace all non-returning strlcpy with strscpy | expand |
On Mon, May 22, 2023 at 03:51:49PM +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 Mon, 22 May 2023 15:51:49 +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. > > [...] Applied to for-next/hardening, thanks! [1/1] drm/rockchip: Replace all non-returning strlcpy with strscpy https://git.kernel.org/kees/c/3bc490653e12
diff --git a/drivers/gpu/drm/rockchip/inno_hdmi.c b/drivers/gpu/drm/rockchip/inno_hdmi.c index f51774866f41..9afb889963c1 100644 --- a/drivers/gpu/drm/rockchip/inno_hdmi.c +++ b/drivers/gpu/drm/rockchip/inno_hdmi.c @@ -797,7 +797,7 @@ static struct i2c_adapter *inno_hdmi_i2c_adapter(struct inno_hdmi *hdmi) adap->dev.parent = hdmi->dev; adap->dev.of_node = hdmi->dev->of_node; adap->algo = &inno_hdmi_algorithm; - strlcpy(adap->name, "Inno HDMI", sizeof(adap->name)); + strscpy(adap->name, "Inno HDMI", sizeof(adap->name)); i2c_set_adapdata(adap, hdmi); ret = i2c_add_adapter(adap); diff --git a/drivers/gpu/drm/rockchip/rk3066_hdmi.c b/drivers/gpu/drm/rockchip/rk3066_hdmi.c index 90145ad96984..b5d042ee052f 100644 --- a/drivers/gpu/drm/rockchip/rk3066_hdmi.c +++ b/drivers/gpu/drm/rockchip/rk3066_hdmi.c @@ -730,7 +730,7 @@ static struct i2c_adapter *rk3066_hdmi_i2c_adapter(struct rk3066_hdmi *hdmi) adap->dev.parent = hdmi->dev; adap->dev.of_node = hdmi->dev->of_node; adap->algo = &rk3066_hdmi_algorithm; - strlcpy(adap->name, "RK3066 HDMI", sizeof(adap->name)); + strscpy(adap->name, "RK3066 HDMI", sizeof(adap->name)); i2c_set_adapdata(adap, hdmi); ret = i2c_add_adapter(adap);
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/gpu/drm/rockchip/inno_hdmi.c | 2 +- drivers/gpu/drm/rockchip/rk3066_hdmi.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)