commit 28128c61e08eaeced9cc8ec0e6b5d677b5b94690 upstream.
The header files for some structures could get included in such a way that struct attributes (specifically __randomize_layout from path.h) would be parsed as variable names instead of attributes. This could lead to some instances of a structure being unrandomized, causing nasty GPFs, etc.
This patch makes sure the compiler_types.h header is included in path.h.
Reported-by: Patrick McLean chutzpah@gentoo.org Root-caused-by: Maciej S. Szmigiero mail@maciej.szmigiero.name Suggested-by: Linus Torvalds torvalds@linux-foundation.org Tested-by: Maciej S. Szmigiero mail@maciej.szmigiero.name Fixes: 3859a271a003 ("randstruct: Mark various structs for randomization") Signed-off-by: Kees Cook keescook@chromium.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org [kees: Adjusted to just path.h for -stable, as this is a smaller change] Signed-off-by: Kees Cook keescook@chromium.org --- This is a much more narrow fix for the issue. I adjusted the commit subject and body, but still reference the "full" upstream commit. Is this the best way to handle this? --- include/linux/path.h | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/include/linux/path.h b/include/linux/path.h index 81e65a5be7ce..74a59d190a3c 100644 --- a/include/linux/path.h +++ b/include/linux/path.h @@ -2,6 +2,8 @@ #ifndef _LINUX_PATH_H #define _LINUX_PATH_H
+#include <linux/compiler_types.h> + struct dentry; struct vfsmount;