From: Kees Cook <keescook@chromium.org>
To: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Kees Cook <keescook@chromium.org>,
Conor Culhane <conor.culhane@silvaco.com>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
linux-i3c@lists.infradead.org,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Tom Rix <trix@redhat.com>,
linux-kernel@vger.kernel.org, llvm@lists.linux.dev,
linux-hardening@vger.kernel.org
Subject: [PATCH] i3c: svc: Annotate struct svc_i3c_xfer with __counted_by
Date: Fri, 22 Sep 2023 10:50:23 -0700 [thread overview]
Message-ID: <20230922175023.work.239-kees@kernel.org> (raw)
Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).
As found with Coccinelle[1], add __counted_by for struct svc_i3c_xfer.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Conor Culhane <conor.culhane@silvaco.com>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: linux-i3c@lists.infradead.org
Signed-off-by: Kees Cook <keescook@chromium.org>
---
drivers/i3c/master/svc-i3c-master.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c
index 8f8295acdadb..32eca2d6caf0 100644
--- a/drivers/i3c/master/svc-i3c-master.c
+++ b/drivers/i3c/master/svc-i3c-master.c
@@ -143,7 +143,7 @@ struct svc_i3c_xfer {
int ret;
unsigned int type;
unsigned int ncmds;
- struct svc_i3c_cmd cmds[];
+ struct svc_i3c_cmd cmds[] __counted_by(ncmds);
};
struct svc_i3c_regs_save {
--
2.34.1
--
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next reply other threads:[~2023-09-22 17:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-22 17:50 Kees Cook [this message]
2023-09-22 17:55 ` [PATCH] i3c: svc: Annotate struct svc_i3c_xfer with __counted_by Miquel Raynal
2023-09-23 16:58 ` Gustavo A. R. Silva
2023-09-25 21:37 ` Alexandre Belloni
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