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Commit ebe119cd authored by H. Peter Anvin's avatar H. Peter Anvin
Browse files

x86: Fix movq immediate operand constraints in uaccess.h 



The movq instruction, generated by __put_user_asm() when used for
64-bit data, takes a sign-extended immediate ("e") not a zero-extended
immediate ("Z").

Signed-off-by: default avatarH. Peter Anvin <hpa@zytor.com>
Cc: Uros Bizjak <ubizjak@gmail.com>
Cc: stable@kernel.org
parent 155b7352

arch/x86/include/asm/uaccess.h

+2 −2
Original line number Original line Diff line number Diff line
@@ -212,9 +212,9 @@ extern int __get_user_bad(void); 
		     : "A" ((typeof(*(ptr)))(x)), "c" (ptr) : "ebx")

		     : "A" ((typeof(*(ptr)))(x)), "c" (ptr) : "ebx")

#else

#else

#define __put_user_asm_u64(x, ptr, retval, errret) \

#define __put_user_asm_u64(x, ptr, retval, errret) \

	__put_user_asm(x, ptr, retval, "q", "", "Zr", errret)

	__put_user_asm(x, ptr, retval, "q", "", "er", errret)

#define __put_user_asm_ex_u64(x, addr)	\

#define __put_user_asm_ex_u64(x, addr)	\

	__put_user_asm_ex(x, addr, "q", "", "Zr")

	__put_user_asm_ex(x, addr, "q", "", "er")

#define __put_user_x8(x, ptr, __ret_pu) __put_user_x(8, x, ptr, __ret_pu)

#define __put_user_x8(x, ptr, __ret_pu) __put_user_x(8, x, ptr, __ret_pu)

#endif

#endif