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Message-ID: <20231023-strncpy-drivers-scsi-elx-libefc-efc_node-h-v1-1-8b66878b6796@google.com>
Date: Mon, 23 Oct 2023 21:58:32 +0000
From: Justin Stitt <justinstitt@...gle.com>
To: James Smart <james.smart@...adcom.com>,
Ram Vegesna <ram.vegesna@...adcom.com>,
"James E.J. Bottomley" <jejb@...ux.ibm.com>,
"Martin K. Petersen" <martin.petersen@...cle.com>
Cc: linux-scsi@...r.kernel.org, target-devel@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org,
Justin Stitt <justinstitt@...gle.com>
Subject: [PATCH] scsi: elx: libefc: replace deprecated strncpy with strscpy
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@...r.kernel.org
Signed-off-by: Justin Stitt <justinstitt@...gle.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@...gle.com>
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