From: Al Viro Date: Sun, 21 May 2017 17:08:42 +0000 (-0400) Subject: fix unsafe_put_user() X-Git-Tag: v4.14-rc1~593^2~10 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a7cc722fff0b32bcd28bf4722dff816b0b695f7d;p=platform%2Fkernel%2Flinux-rpi.git fix unsafe_put_user() __put_user_size() relies upon its first argument having the same type as what the second one points to; the only other user makes sure of that and unsafe_put_user() should do the same. Signed-off-by: Al Viro --- diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h index 68766b276d9e..d9668c3beb5b 100644 --- a/arch/x86/include/asm/uaccess.h +++ b/arch/x86/include/asm/uaccess.h @@ -703,7 +703,7 @@ extern struct movsl_mask { #define unsafe_put_user(x, ptr, err_label) \ do { \ int __pu_err; \ - __put_user_size((x), (ptr), sizeof(*(ptr)), __pu_err, -EFAULT); \ + __put_user_size((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)), __pu_err, -EFAULT); \ if (unlikely(__pu_err)) goto err_label; \ } while (0)