perf symbols: Fix crash in elf_section_by_name

[~andy/linux] / tools / perf / util / symbol-elf.c

diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
index 3e9f336740fa8699b2bdd16669e05cd8f8f6dede..516d19fb999bcfaddb6511e0292ea341a0e74aa6 100644 (file)
--- a/tools/perf/util/symbol-elf.c
+++ b/tools/perf/util/symbol-elf.c
@@ -151,15 +151,15 @@ Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
 
                gelf_getshdr(sec, shp);
                str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);
-               if (!strcmp(name, str)) {
+               if (str && !strcmp(name, str)) {
                        if (idx)
                                *idx = cnt;
-                       break;
+                       return sec;
                }
                ++cnt;
        }
 
-       return sec;
+       return NULL;
 }
 
 #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \