lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date: Tue,  3 Oct 2023 16:18:33 -0700
From: Kees Cook <>
To: "David S. Miller" <>
Cc: Kees Cook <>,
	Eric Dumazet <>,
	Jakub Kicinski <>,
	Paolo Abeni <>,,
	"Gustavo A. R. Silva" <>,
	Nathan Chancellor <>,
	Nick Desaulniers <>,
	Tom Rix <>,,,
Subject: [PATCH] flow_offload: Annotate struct flow_action_entry with __counted_by

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

As found with Coccinelle[1], add __counted_by for struct flow_action_entry.

Cc: "David S. Miller" <>
Cc: Eric Dumazet <>
Cc: Jakub Kicinski <>
Cc: Paolo Abeni <>
Link: [1]
Signed-off-by: Kees Cook <>
 include/net/flow_offload.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
index 9efa9a59e81f..314087a5e181 100644
--- a/include/net/flow_offload.h
+++ b/include/net/flow_offload.h
@@ -333,7 +333,7 @@ struct flow_action_entry {
 struct flow_action {
 	unsigned int			num_entries;
-	struct flow_action_entry	entries[];
+	struct flow_action_entry	entries[] __counted_by(num_entries);
 static inline bool flow_action_has_entries(const struct flow_action *action)

Powered by blists - more mailing lists