Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759924Ab2HIWW1 (ORCPT ); Thu, 9 Aug 2012 18:22:27 -0400 Received: from e31.co.us.ibm.com ([32.97.110.149]:48274 "EHLO e31.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759862Ab2HIWWL (ORCPT ); Thu, 9 Aug 2012 18:22:11 -0400 From: Cody P Schafer To: Arnaldo Carvalho de Melo Cc: LKML , Ingo Molnar , Paul Mackerras , Peter Zijlstra , Sukadev Bhattiprolu , Matt Hellsley , David Hansen Subject: [PATCH 05/16] perf symbol: don't try to synthesize plt without dynstr. Date: Thu, 9 Aug 2012 15:18:30 -0700 Message-Id: <1344550721-21024-6-git-send-email-cody@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.11.3 In-Reply-To: <1344550721-21024-1-git-send-email-cody@linux.vnet.ibm.com> References: <1344550721-21024-1-git-send-email-cody@linux.vnet.ibm.com> X-Content-Scanned: Fidelis XPS MAILER x-cbid: 12080922-7282-0000-0000-00000BD3196B Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 972 Lines: 30 If .dynsym exists but .dynstr is empty (NO_BITS or size==0), a segfault occurs. Avoid this by checking that .dynstr is not empty. Signed-off-by: Cody P Schafer --- tools/perf/util/symbol.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 254d4d8..8ae159a 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -1077,6 +1077,9 @@ dso__synthesize_plt_symbols(struct dso *dso, char *name, struct map *map, if (symstrs == NULL) goto out_elf_end; + if (symstrs->d_size == 0) + goto out_elf_end; + nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; plt_offset = shdr_plt.sh_offset; -- 1.7.11.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/