From: Kees Cook <keescook@chromium.org>
To: Alasdair Kergon <agk@redhat.com>
Cc: Kees Cook <keescook@chromium.org>,
Mike Snitzer <snitzer@kernel.org>,
dm-devel@redhat.com, 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] dm: Annotate struct stripe_c with __counted_by
Date: Fri, 15 Sep 2023 13:03:53 -0700 [thread overview]
Message-ID: <20230915200352.never.118-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 stripe_c.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Alasdair Kergon <agk@redhat.com>
Cc: Mike Snitzer <snitzer@kernel.org>
Cc: dm-devel@redhat.com
Signed-off-by: Kees Cook <keescook@chromium.org>
---
drivers/md/dm-stripe.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c
index e2854a3cbd28..5e70f5ae394d 100644
--- a/drivers/md/dm-stripe.c
+++ b/drivers/md/dm-stripe.c
@@ -44,7 +44,7 @@ struct stripe_c {
/* Work struct used for triggering events*/
struct work_struct trigger_event;
- struct stripe stripe[];
+ struct stripe stripe[] __counted_by(stripes);
};
/*
--
2.34.1
next reply other threads:[~2023-09-15 20:04 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-15 20:03 Kees Cook [this message]
2023-09-15 20:32 ` [PATCH] dm: Annotate struct stripe_c with __counted_by Gustavo A. R. Silva
2023-09-29 19:21 ` Kees Cook
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