* [PATCH RESEND] crypto: af_alg - Annotate struct af_alg_iv with __counted_by
@ 2026-01-05 12:24 Thorsten Blum
2026-01-12 22:30 ` Kees Cook
0 siblings, 1 reply; 2+ messages in thread
From: Thorsten Blum @ 2026-01-05 12:24 UTC (permalink / raw)
To: Andrew Lunn, David S. Miller, Eric Dumazet, Jakub Kicinski,
Paolo Abeni, Kees Cook, Gustavo A. R. Silva
Cc: Thorsten Blum, Simon Horman, netdev, linux-kernel,
linux-hardening
Add the __counted_by() compiler attribute to the flexible array member
'iv' to improve access bounds-checking via CONFIG_UBSAN_BOUNDS and
CONFIG_FORTIFY_SOURCE.
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
---
include/uapi/linux/if_alg.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/uapi/linux/if_alg.h b/include/uapi/linux/if_alg.h
index b35871cbeed7..4f51e198ac2e 100644
--- a/include/uapi/linux/if_alg.h
+++ b/include/uapi/linux/if_alg.h
@@ -42,7 +42,7 @@ struct sockaddr_alg_new {
struct af_alg_iv {
__u32 ivlen;
- __u8 iv[];
+ __u8 iv[] __counted_by(ivlen);
};
/* Socket options */
--
Thorsten Blum <thorsten.blum@linux.dev>
GPG: 1D60 735E 8AEF 3BE4 73B6 9D84 7336 78FD 8DFE EAD4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH RESEND] crypto: af_alg - Annotate struct af_alg_iv with __counted_by
2026-01-05 12:24 [PATCH RESEND] crypto: af_alg - Annotate struct af_alg_iv with __counted_by Thorsten Blum
@ 2026-01-12 22:30 ` Kees Cook
0 siblings, 0 replies; 2+ messages in thread
From: Kees Cook @ 2026-01-12 22:30 UTC (permalink / raw)
To: Andrew Lunn, David S. Miller, Eric Dumazet, Jakub Kicinski,
Paolo Abeni, Gustavo A. R. Silva, Thorsten Blum
Cc: Kees Cook, Simon Horman, netdev, linux-kernel, linux-hardening
On Mon, 05 Jan 2026 13:24:03 +0100, Thorsten Blum wrote:
> Add the __counted_by() compiler attribute to the flexible array member
> 'iv' to improve access bounds-checking via CONFIG_UBSAN_BOUNDS and
> CONFIG_FORTIFY_SOURCE.
>
>
Applied to for-next/hardening, thanks!
[1/1] crypto: af_alg - Annotate struct af_alg_iv with __counted_by
https://git.kernel.org/kees/c/98569017111e
Take care,
--
Kees Cook
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