Commit 46f6236a authored by Laura Abbott's avatar Laura Abbott Committed by Will Deacon

mm/usercopy: Switch to using lm_alias

The usercopy checking code currently calls __va(__pa(...)) to check for
aliases on symbols. Switch to using lm_alias instead.
Reviewed-by: default avatarMark Rutland <mark.rutland@arm.com>
Tested-by: default avatarMark Rutland <mark.rutland@arm.com>
Acked-by: default avatarKees Cook <keescook@chromium.org>
Signed-off-by: default avatarLaura Abbott <labbott@redhat.com>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent 5c6a84a3
...@@ -108,13 +108,13 @@ static inline const char *check_kernel_text_object(const void *ptr, ...@@ -108,13 +108,13 @@ static inline const char *check_kernel_text_object(const void *ptr,
* __pa() is not just the reverse of __va(). This can be detected * __pa() is not just the reverse of __va(). This can be detected
* and checked: * and checked:
*/ */
textlow_linear = (unsigned long)__va(__pa(textlow)); textlow_linear = (unsigned long)lm_alias(textlow);
/* No different mapping: we're done. */ /* No different mapping: we're done. */
if (textlow_linear == textlow) if (textlow_linear == textlow)
return NULL; return NULL;
/* Check the secondary mapping... */ /* Check the secondary mapping... */
texthigh_linear = (unsigned long)__va(__pa(texthigh)); texthigh_linear = (unsigned long)lm_alias(texthigh);
if (overlaps(ptr, n, textlow_linear, texthigh_linear)) if (overlaps(ptr, n, textlow_linear, texthigh_linear))
return "<linear kernel text>"; return "<linear kernel text>";
......
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