Commit 15583e51 authored Jun 14, 2022 by Peter Zijlstra Committed by Borislav Petkov Jun 27, 2022

x86/vsyscall_emu/64: Don't use RET in vsyscall emulation



This is userspace code and doesn't play by the normal kernel rules.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>

parent af2e140f

arch/x86/entry/vsyscall/vsyscall_emu_64.S

+6 −3

Original line number	Diff line number	Diff line
		@@ -19,17 +19,20 @@ __vsyscall_page:

		mov $__NR_gettimeofday, %rax
		syscall
		RET
		ret
		int3

		.balign 1024, 0xcc
		mov $__NR_time, %rax
		syscall
		RET
		ret
		int3

		.balign 1024, 0xcc
		mov $__NR_getcpu, %rax
		syscall
		RET
		ret
		int3

		.balign 4096, 0xcc