* [PATCH RESEND] powerpc/rtas: Replace one-element array with flexible array member
@ 2025-08-13 10:30 Thorsten Blum
2026-06-19 22:00 ` Madhavan Srinivasan
0 siblings, 1 reply; 2+ messages in thread
From: Thorsten Blum @ 2025-08-13 10:30 UTC (permalink / raw)
To: Madhavan Srinivasan, Michael Ellerman, Nicholas Piggin,
Christophe Leroy, Kees Cook, Gustavo A. R. Silva
Cc: linux-hardening, Thorsten Blum, linuxppc-dev, linux-kernel
Replace the deprecated one-element array with a modern flexible array
member in the struct rtas_error_log and add the __counted_by_be()
compiler attribute to improve access bounds-checking via
CONFIG_UBSAN_BOUNDS and CONFIG_FORTIFY_SOURCE.
Link: https://github.com/KSPP/linux/issues/79
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
---
arch/powerpc/include/asm/rtas-types.h | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/include/asm/rtas-types.h b/arch/powerpc/include/asm/rtas-types.h
index 9d5b16803cbb..5d40d187b965 100644
--- a/arch/powerpc/include/asm/rtas-types.h
+++ b/arch/powerpc/include/asm/rtas-types.h
@@ -42,8 +42,9 @@ struct rtas_error_log {
*/
u8 byte3; /* General event or error*/
__be32 extended_log_length; /* length in bytes */
- unsigned char buffer[1]; /* Start of extended log */
- /* Variable length. */
+
+ /* Start of extended log, variable length */
+ unsigned char buffer[] __counted_by_be(extended_log_length);
};
/* RTAS general extended event log, Version 6. The extended log starts
--
2.50.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH RESEND] powerpc/rtas: Replace one-element array with flexible array member
2025-08-13 10:30 [PATCH RESEND] powerpc/rtas: Replace one-element array with flexible array member Thorsten Blum
@ 2026-06-19 22:00 ` Madhavan Srinivasan
0 siblings, 0 replies; 2+ messages in thread
From: Madhavan Srinivasan @ 2026-06-19 22:00 UTC (permalink / raw)
To: Michael Ellerman, Nicholas Piggin, Kees Cook, Gustavo A. R. Silva,
Christophe Leroy, Thorsten Blum
Cc: linux-hardening, linuxppc-dev, linux-kernel
On Wed, 13 Aug 2025 12:30:59 +0200, Thorsten Blum wrote:
> Replace the deprecated one-element array with a modern flexible array
> member in the struct rtas_error_log and add the __counted_by_be()
> compiler attribute to improve access bounds-checking via
> CONFIG_UBSAN_BOUNDS and CONFIG_FORTIFY_SOURCE.
>
>
Applied to powerpc/next.
[1/1] powerpc/rtas: Replace one-element array with flexible array member
https://git.kernel.org/powerpc/c/ab8bbf8024b7434e2b630965fd373fba5b89f29f
cheers
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2026-06-19 22:00 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2025-08-13 10:30 [PATCH RESEND] powerpc/rtas: Replace one-element array with flexible array member Thorsten Blum
2026-06-19 22:00 ` Madhavan Srinivasan
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.