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powerpc/rtas: Replace one-element array with flexible array member

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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>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20250813103101.163698-2-thorsten.blum@linux.dev
This commit is contained in:
Thorsten Blum 2025-08-13 12:30:59 +02:00 committed by Madhavan Srinivasan
parent ea8b474b55
commit ab8bbf8024
1 changed files with 3 additions and 2 deletions
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5
arch/powerpc/include/asm/rtas-types.h
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@ -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