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authorAnton Blanchard <anton@samba.org>2011-08-24 16:40:14 +1000
committerGreg Kroah-Hartman <gregkh@suse.de>2011-10-03 11:41:02 -0700
commit8413239bfc9e8b94af509c7a43c7d92bd8965630 (patch)
tree0e71939cc45aea5ffe085fe27661d91065f47b7e
parent99904bf394be0c65e12440bca422b18d1198d73f (diff)
perf symbols: Fix ppc64 SEGV in dso__load_sym with debuginfo files
commit adb091846318f86e4f46c7d6a7b40d2f478abdbe upstream. 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. Cc: <stable@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Eric B Munson <emunson@mgebm.net> Link: http://lkml.kernel.org/r/20110824065242.895239970@samba.org Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--tools/perf/util/symbol.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index eec196329fd..40fd1c7c38a 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1111,6 +1111,8 @@ static int dso__load_sym(struct dso *dso, struct map *map, const char *name,
}
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);