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Message-Id: <20230127224101.never.746-kees@kernel.org>
Date: Fri, 27 Jan 2023 14:41:02 -0800
From: Kees Cook <keescook@...omium.org>
To: Rob Herring <robh+dt@...nel.org>
Cc: Kees Cook <keescook@...omium.org>,
Frank Rowand <frowand.list@...il.com>,
devicetree@...r.kernel.org,
"Gustavo A. R. Silva" <gustavoars@...nel.org>,
linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: [PATCH] scripts/dtc: Replace 0-length arrays with flexible arrays
Replace the 0-length array with a C99 flexible array. Seen with GCC 13
under -fstrict-flex-arrays:
In file included from ../lib/fdt_ro.c:2:
../lib/../scripts/dtc/libfdt/fdt_ro.c: In function 'fdt_get_name':
../lib/../scripts/dtc/libfdt/fdt_ro.c:319:24: warning: 'strrchr' reading 1 or more bytes from a region of size 0 [-Wstringop-overread]
319 | leaf = strrchr(nameptr, '/');
| ^~~~~~~~~~~~~~~~~~~~~
Cc: Rob Herring <robh+dt@...nel.org>
Cc: Frank Rowand <frowand.list@...il.com>
Cc: devicetree@...r.kernel.org
Signed-off-by: Kees Cook <keescook@...omium.org>
---
scripts/dtc/libfdt/fdt.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/scripts/dtc/libfdt/fdt.h b/scripts/dtc/libfdt/fdt.h
index f2e68807f277..0c91aa7f67b5 100644
--- a/scripts/dtc/libfdt/fdt.h
+++ b/scripts/dtc/libfdt/fdt.h
@@ -35,14 +35,14 @@ struct fdt_reserve_entry {
struct fdt_node_header {
fdt32_t tag;
- char name[0];
+ char name[];
};
struct fdt_property {
fdt32_t tag;
fdt32_t len;
fdt32_t nameoff;
- char data[0];
+ char data[];
};
#endif /* !__ASSEMBLY */
--
2.34.1
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