linux-kernel - [PATCH] perf: Fix ppc64 SEGV in dso__load

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 25 Jul 2011 14:22:09 +1000
From:	Anton Blanchard <anton@...ba.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	emunson@...bm.net
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] perf: Fix ppc64 SEGV in dso__load_sym with debuginfo files


64bit PowerPC debuginfo files have an empty function descriptor
section. I hit a SEGV when perf tried to use this section for
symbol resolution.

To fix this we need to check the section is valid and we can
do this by checking for type SHT_PROGBITS.

Signed-off-by: Anton Blanchard <anton@...ba.org>
Cc: <stable@...nel.org>
---

Index: linux-2.6-tip/tools/perf/util/symbol.c
===================================================================
--- linux-2.6-tip.orig/tools/perf/util/symbol.c	2011-07-11 12:49:12.341506269 +1000
+++ linux-2.6-tip/tools/perf/util/symbol.c	2011-07-24 14:48:00.203783423 +1000
@@ -1111,6 +1111,8 @@ static int dso__load_sym(struct dso *dso
 	}
 
 	opdsec = elf_section_by_name(elf, &ehdr, &opdshdr, ".opd", &opdidx);
+	if (opdshdr.sh_type != SHT_PROGBITS)
+		opdsec = NULL;
 	if (opdsec)
 		opddata = elf_rawdata(opdsec, NULL);
 
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/