From: Justin Stitt <justinstitt@google.com>
To: James Smart <james.smart@broadcom.com>,
Ram Vegesna <ram.vegesna@broadcom.com>,
"James E.J. Bottomley" <jejb@linux.ibm.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>
Cc: linux-scsi@vger.kernel.org, target-devel@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org,
Justin Stitt <justinstitt@google.com>
Subject: [PATCH] scsi: elx: libefc: replace deprecated strncpy with strscpy
Date: Mon, 23 Oct 2023 21:58:32 +0000 [thread overview]
Message-ID: <20231023-strncpy-drivers-scsi-elx-libefc-efc_node-h-v1-1-8b66878b6796@google.com> (raw)
strncpy() is deprecated for use on NUL-terminated destination strings
[1] and as such we should prefer more robust and less ambiguous string
interfaces.
A suitable replacement is `strscpy` [2] due to the fact that it
guarantees NUL-termination on the destination buffer without
unnecessarily NUL-padding.
There seems to not be any uses of `current_state_name` other than in
these assignments. Judging from context surrounding these assignments,
especially considering the string literal "invalid" being assigned, we
want both current_state_name and prev_state_name to be NUL-terminated
strings.
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>
---
Note: build-tested only.
Found with: $ rg "strncpy\("
---
drivers/scsi/elx/libefc/efc_node.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi/elx/libefc/efc_node.h b/drivers/scsi/elx/libefc/efc_node.h
index e9c600ac45d5..3a16703d0f97 100644
--- a/drivers/scsi/elx/libefc/efc_node.h
+++ b/drivers/scsi/elx/libefc/efc_node.h
@@ -26,12 +26,12 @@ efc_node_evt_set(struct efc_sm_ctx *ctx, enum efc_sm_event evt,
struct efc_node *node = ctx->app;
if (evt == EFC_EVT_ENTER) {
- strncpy(node->current_state_name, handler,
+ strscpy(node->current_state_name, handler,
sizeof(node->current_state_name));
} else if (evt == EFC_EVT_EXIT) {
- strncpy(node->prev_state_name, node->current_state_name,
+ strscpy(node->prev_state_name, node->current_state_name,
sizeof(node->prev_state_name));
- strncpy(node->current_state_name, "invalid",
+ strscpy(node->current_state_name, "invalid",
sizeof(node->current_state_name));
}
node->prev_evt = node->current_evt;
---
base-commit: 9c5d00cb7b6bbc5a7965d9ab7d223b5402d1f02c
change-id: 20231023-strncpy-drivers-scsi-elx-libefc-efc_node-h-cbbf753197b7
Best regards,
--
Justin Stitt <justinstitt@google.com>
next reply other threads:[~2023-10-23 21:58 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-23 21:58 Justin Stitt [this message]
2023-10-25 0:42 ` [PATCH] scsi: elx: libefc: replace deprecated strncpy with strscpy Kees Cook
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20231023-strncpy-drivers-scsi-elx-libefc-efc_node-h-v1-1-8b66878b6796@google.com \
--to=justinstitt@google.com \
--cc=james.smart@broadcom.com \
--cc=jejb@linux.ibm.com \
--cc=linux-hardening@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=martin.petersen@oracle.com \
--cc=ram.vegesna@broadcom.com \
--cc=target-devel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).