objtool: Fix interval tree insertion for zero-length symbols

Zero-length symbols get inserted in the wrong spot.  Fix that.

Acked-by: Petr Mladek <pmladek@suse.com>
Tested-by: Joe Lawrence <joe.lawrence@redhat.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>

diff --git a/tools/objtool/elf.c b/tools/objtool/elf.c
index a8a78b55d3eceea40c7e8269dfd47f0932b533cb..c024937eb12a2ee715c69e2a6e0675d9a625c1a6 100644 (file)
--- a/tools/objtool/elf.c
+++ b/tools/objtool/elf.c
@@ -92,7 +92,7 @@ static inline unsigned long __sym_start(struct symbol *s)
 
 static inline unsigned long __sym_last(struct symbol *s)
 {
-       return s->offset + s->len - 1;
+       return s->offset + (s->len ? s->len - 1 : 0);
 }
 
 INTERVAL_TREE_DEFINE(struct symbol, node, unsigned long, __subtree_last,