6.18-stable review patch. If anyone has any objections, please let me know.
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From: Peter Zijlstra peterz@infradead.org
commit c56a12c71ad38f381105f6e5036dede64ad2dfee upstream.
For some mysterious reasons the GCC 8 and 9 preprocessor manages to sporadically fumble _ASM_BYTES(0x0f, 0x0b):
$ grep ".byte[ ]*0x0f" defconfig-build/drivers/net/wireless/realtek/rtlwifi/base.s 1: .byte0x0f,0x0b ; 1: .byte 0x0f,0x0b ;
which makes the assembler upset and all that. While there are more _ASM_BYTES() users (notably the NOP instructions), those don't seem affected. Therefore replace the offending ASM_UD2 with one using the ud2 mnemonic.
Reported-by: Jean Delvare jdelvare@suse.de Suggested-by: Uros Bizjak ubizjak@gmail.com Fixes: 85a2d4a890dc ("x86,ibt: Use UDB instead of 0xEA") Cc: stable@kernel.org Signed-off-by: Peter Zijlstra (Intel) peterz@infradead.org Link: https://patch.msgid.link/20251218104659.GT3911114@noisy.programming.kicks-as... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/x86/include/asm/bug.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/include/asm/bug.h +++ b/arch/x86/include/asm/bug.h @@ -10,7 +10,7 @@ /* * Despite that some emulators terminate on UD2, we use it for WARN(). */ -#define ASM_UD2 _ASM_BYTES(0x0f, 0x0b) +#define ASM_UD2 __ASM_FORM(ud2) #define INSN_UD2 0x0b0f #define LEN_UD2 2