libdw: Make sure id_path can contain max number of build id bytes.

[platform/upstream/elfutils.git] / libdw / dwarf_getalt.c

diff --git a/libdw/dwarf_getalt.c b/libdw/dwarf_getalt.c
index 3339b3e..0a12dfa 100644 (file)
--- a/libdw/dwarf_getalt.c
+++ b/libdw/dwarf_getalt.c
@@ -123,7 +123,7 @@ find_debug_altlink (Dwarf *dbg)
     {
       /* Note sizeof a string literal includes the trailing zero.  */
       char id_path[sizeof DEBUGINFO_PATH - 1 + sizeof "/.build-id/" - 1
-                  + 2 + 1 + (MAX_BUILD_ID_BYTES - 2) * 2 + sizeof ".debug"];
+                  + 2 + 1 + (MAX_BUILD_ID_BYTES - 1) * 2 + sizeof ".debug"];
       sprintf (&id_path[0], "%s%s", DEBUGINFO_PATH, "/.build-id/");
       sprintf (&id_path[sizeof DEBUGINFO_PATH - 1 + sizeof "/.build-id/" - 1],
               "%02" PRIx8 "/", (uint8_t) id[0]);