| Message ID | 20230530162321.984035-1-azeemshaikh38@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | scsi: smartpqi: Replace all non-returning strlcpy with strscpy | expand |
On Tue, May 30, 2023 at 04:23:21PM +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>
Azeem, > 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 6.5/scsi-staging, thanks!
diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c index 03de97cd72c2..74f608b9fc9d 100644 --- a/drivers/scsi/smartpqi/smartpqi_init.c +++ b/drivers/scsi/smartpqi/smartpqi_init.c @@ -6903,7 +6903,7 @@ static ssize_t pqi_lockup_action_store(struct device *dev, char *action_name; char action_name_buffer[32]; - strlcpy(action_name_buffer, buffer, sizeof(action_name_buffer)); + strscpy(action_name_buffer, buffer, sizeof(action_name_buffer)); action_name = strstrip(action_name_buffer); for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
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/scsi/smartpqi/smartpqi_init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)