From: Kees Cook Date: Thu, 9 Dec 2021 04:34:56 +0000 (-0800) Subject: x86/uaccess: Move variable into switch case statement X-Git-Tag: v6.6.17~8508^2~3 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=61646ca83d3889696f2772edaff122dd96a2935e;p=platform%2Fkernel%2Flinux-rpi.git x86/uaccess: Move variable into switch case statement When building with automatic stack variable initialization, GCC 12 complains about variables defined outside of switch case statements. Move the variable into the case that uses it, which silences the warning: ./arch/x86/include/asm/uaccess.h:317:23: warning: statement will never be executed [-Wswitch-unreachable] 317 | unsigned char x_u8__; \ | ^~~~~~ Fixes: 865c50e1d279 ("x86/uaccess: utilize CONFIG_CC_HAS_ASM_GOTO_OUTPUT") Signed-off-by: Kees Cook Signed-off-by: Dave Hansen Signed-off-by: Borislav Petkov Link: https://lkml.kernel.org/r/20211209043456.1377875-1-keescook@chromium.org --- diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h index 33a6840..8ab9e79 100644 --- a/arch/x86/include/asm/uaccess.h +++ b/arch/x86/include/asm/uaccess.h @@ -314,11 +314,12 @@ do { \ do { \ __chk_user_ptr(ptr); \ switch (size) { \ - unsigned char x_u8__; \ - case 1: \ + case 1: { \ + unsigned char x_u8__; \ __get_user_asm(x_u8__, ptr, "b", "=q", label); \ (x) = x_u8__; \ break; \ + } \ case 2: \ __get_user_asm(x, ptr, "w", "=r", label); \ break; \