From: Kees Cook <keescook@chromium.org>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: Kees Cook <keescook@chromium.org>,
Jamal Hadi Salim <jhs@mojatatu.com>,
Cong Wang <xiyou.wangcong@gmail.com>,
Jiri Pirko <jiri@resnulli.us>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
netdev@vger.kernel.org,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Tom Rix <trix@redhat.com>,
linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org,
llvm@lists.linux.dev
Subject: [PATCH] netem: Annotate struct disttable with __counted_by
Date: Tue, 3 Oct 2023 16:18:23 -0700 [thread overview]
Message-ID: <20231003231823.work.684-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 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 disttable.
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: netdev@vger.kernel.org
Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1]
Signed-off-by: Kees Cook <keescook@chromium.org>
---
net/sched/sch_netem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c
index 4ad39a4a3cf5..6ba2dc191ed9 100644
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -67,7 +67,7 @@
struct disttable {
u32 size;
- s16 table[];
+ s16 table[] __counted_by(size);
};
struct netem_sched_data {
--
2.34.1
next reply other threads:[~2023-10-03 23:18 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-03 23:18 Kees Cook [this message]
2023-10-03 23:38 ` [PATCH] netem: Annotate struct disttable with __counted_by Gustavo A. R. Silva
2023-10-04 3:32 ` Stephen Hemminger
2023-10-06 1:40 ` patchwork-bot+netdevbpf
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