struct type_descriptor is arranged with a NUL terminated string following the
kind/info fields.
The only reason this doesn't trip UBSAN detection itself (on more modern
compilers at least) is because struct type_descriptor is only referenced in
suppressed regions.
Switch the declaration to be a real flexible member. No functional change.
Fixes: 00fcf4dd8eb4 ("xen/ubsan: Import ubsan implementation from Linux 4.13")
Signed-off-by: Andrew Cooper <andrew.coop...@citrix.com>
---
CC: George Dunlap <george.dun...@citrix.com>
CC: Jan Beulich <jbeul...@suse.com>
CC: Stefano Stabellini <sstabell...@kernel.org>
CC: Julien Grall <jul...@xen.org>
CC: Oleksii Kurochko <oleksii.kuroc...@gmail.com>
For 4.19, and for backport to all reasonable versions. This bug deserves some
kind of irony award.
---
xen/common/ubsan/ubsan.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/xen/common/ubsan/ubsan.h b/xen/common/ubsan/ubsan.h
index a3159040fefb..3db42e75b138 100644
--- a/xen/common/ubsan/ubsan.h
+++ b/xen/common/ubsan/ubsan.h
@@ -10,7 +10,7 @@ enum {
struct type_descriptor {
u16 type_kind;
u16 type_info;
- char type_name[1];
+ char type_name[];
};
struct source_location {
base-commit: 8b4243a9b560c89bb259db5a27832c253d4bebc7
--
2.39.2
