perf symbols: Fix crash in elf_section_by_name
Fixing crash in elf_section_by_name function caused by missing section name in elf binary. Reported-by: Albert Strasheim <albert@cloudflare.com> Signed-off-by: Jiri Olsa <jolsa@redhat.com> Cc: Albert Strasheim <albert@cloudflare.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1393767127-599-1-git-send-email-jolsa@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -151,15 +151,15 @@ Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
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gelf_getshdr(sec, shp);
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str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);
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if (!strcmp(name, str)) {
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if (str && !strcmp(name, str)) {
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if (idx)
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*idx = cnt;
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break;
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return sec;
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}
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++cnt;
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}
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return sec;
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return NULL;
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}
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#define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \
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