Commit 913bd9060195 ("[PATCH] x86_64: Increase the variability of the process stack on 64bit architectures"), merged in 2006, increased stack randomisation from 8 MiB to an ostensible 1 GiB for 64-bit systems. However the commit actually introduced a mask of 0x3fffff * 4 KiB pages which provides 16 GiB of randomisation, not 1 GiB. It appears Andi perhaps typo'd an additional 'f', as 0x3ffff would indeed provide the stated 1 GiB. Since this value has been in use for 20 years it seems sensible to retain it, so correct the comment instead. Signed-off-by: Lorenzo Stoakes (ARM) --- arch/x86/include/asm/elf.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/include/asm/elf.h b/arch/x86/include/asm/elf.h index 0de9df759c99..4133c790e71a 100644 --- a/arch/x86/include/asm/elf.h +++ b/arch/x86/include/asm/elf.h @@ -322,7 +322,7 @@ extern unsigned long get_sigframe_size(void); #else /* CONFIG_X86_32 */ -/* 1GB for 64bit, 8MB for 32bit */ +/* 16GB for 64bit, 8MB for 32bit */ #define __STACK_RND_MASK(is32bit) ((is32bit) ? 0x7ff : 0x3fffff) #define STACK_RND_MASK __STACK_RND_MASK(mmap_is_ia32()) --- base-commit: 248951ddc14de84de3910f9b13f51491a8cd91df change-id: 20260722-fix-x86-comment-af666535315d Cheers, -- Lorenzo Stoakes (ARM)