linux-kernel - [PATCH] x86/boot: Remove unused function __fortify

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Date: Mon, 10 Jun 2024 14:57:22 +0300
From: Nikolay Borisov <nik.borisov@...e.com>
To: x86@...nel.org
Cc: linux-kernel@...r.kernel.org,
	kees@...nel.org,
	bp@...en8.de,
	Nikolay Borisov <nik.borisov@...e.com>
Subject: [PATCH] x86/boot: Remove unused function __fortify_panic()

That functino is only used when the kernel is compiled with
FORTIFY_SOURCE and when the kernel proper string.h header is used. The
decompressor code doesn't use the kernel proper header but has local
copy which doesn't contain any fortified implementations of the various
string functions. As such __fortify_panic can never be called from the
decompressor so let's remove it.

Signed-off-by: Nikolay Borisov <nik.borisov@...e.com>
---
 arch/x86/boot/compressed/misc.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c
index b70e4a21c15f..944454306ef4 100644
--- a/arch/x86/boot/compressed/misc.c
+++ b/arch/x86/boot/compressed/misc.c
@@ -531,8 +531,3 @@ asmlinkage __visible void *extract_kernel(void *rmode, unsigned char *output)

 	return output + entry_offset;
 }
-
-void __fortify_panic(const u8 reason, size_t avail, size_t size)
-{
-	error("detected buffer overflow");
-}
-- 
2.34.1