| Message ID | 20240228-strncpy-drivers-scsi-mpi3mr-mpi3mr_fw-c-v2-1-dacebd3fcfa0@google.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | scsi: replace deprecated strncpy | expand |
On Wed, Feb 28, 2024 at 10:59:01PM +0000, Justin Stitt wrote: > Really, there's no bug with the current code. Let's just ditch strncpy() > all together. > > We can just copy the const strings instead of reserving room on the > stack. > > 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 > Cc: linux-hardening@vger.kernel.org > Signed-off-by: Justin Stitt <justinstitt@google.com> Reviewed-by: Kees Cook <keescook@chromium.org>
diff --git a/drivers/scsi/mpi3mr/mpi3mr_fw.c b/drivers/scsi/mpi3mr/mpi3mr_fw.c index 528f19f782f2..da0710cdac1d 100644 --- a/drivers/scsi/mpi3mr/mpi3mr_fw.c +++ b/drivers/scsi/mpi3mr/mpi3mr_fw.c @@ -3676,7 +3676,7 @@ static const struct { * mpi3mr_print_ioc_info - Display controller information * @mrioc: Adapter instance reference * - * Display controller personalit, capability, supported + * Display controller personality, capability, supported * protocols etc. * * Return: Nothing @@ -3685,20 +3685,20 @@ static void mpi3mr_print_ioc_info(struct mpi3mr_ioc *mrioc) { int i = 0, bytes_written = 0; - char personality[16]; + const char *personality; char protocol[50] = {0}; char capabilities[100] = {0}; struct mpi3mr_compimg_ver *fwver = &mrioc->facts.fw_ver; switch (mrioc->facts.personality) { case MPI3_IOCFACTS_FLAGS_PERSONALITY_EHBA: - strncpy(personality, "Enhanced HBA", sizeof(personality)); + personality = "Enhanced HBA"; break; case MPI3_IOCFACTS_FLAGS_PERSONALITY_RAID_DDR: - strncpy(personality, "RAID", sizeof(personality)); + personality = "RAID"; break; default: - strncpy(personality, "Unknown", sizeof(personality)); + personality = "Unknown"; break; }
Really, there's no bug with the current code. Let's just ditch strncpy() all together. We can just copy the const strings instead of reserving room on the stack. 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 Cc: linux-hardening@vger.kernel.org Signed-off-by: Justin Stitt <justinstitt@google.com> --- changes from v1->v2: * use const char* assignments rather than strscpy (thanks Finn+Kees) --- drivers/scsi/mpi3mr/mpi3mr_fw.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)