On Tue, Aug 22, 2023 at 11:59:26PM +0000, Justin Stitt wrote: > `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`! > > Link: 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 > Cc: linux-hardening@xxxxxxxxxxxxxxx > Signed-off-by: Justin Stitt <justinstitt@xxxxxxxxxx> > --- > block/partitions/ibm.c | 8 ++++---- > 1 file changed, 4 insertions(+), 4 deletions(-) > > diff --git a/block/partitions/ibm.c b/block/partitions/ibm.c > index 403756dbd50d..e5893cf71b57 100644 > --- a/block/partitions/ibm.c > +++ b/block/partitions/ibm.c > @@ -111,11 +111,11 @@ static int find_label(struct parsed_partitions *state, > !strcmp(temp, "LNX1") || > !strcmp(temp, "CMS1")) { > if (!strcmp(temp, "VOL1")) { > - strncpy(type, label->vol.vollbl, 4); > - strncpy(name, label->vol.volid, 6); > + strscpy(type, label->vol.vollbl, 4); > + strscpy(name, label->vol.volid, 6); > } else { > - strncpy(type, label->lnx.vollbl, 4); > - strncpy(name, label->lnx.volid, 6); > + strscpy(type, label->lnx.vollbl, 4); > + strscpy(name, label->lnx.volid, 6); > } > EBCASC(type, 4); > EBCASC(name, 6); I'm quite sure this is not correct, since both type and name are not necessarily NUL-terminated, and this code operates on purpose on such strings. Since currently Stefan and Jan are both not available, I added Peter Oberparleiter to Cc who hopefully knows better than me.
