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| author | Anton Blanchard <anton@samba.org> | 2011-08-24 16:40:14 +1000 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2011-09-23 14:35:57 -0300 |
| commit | adb091846318f86e4f46c7d6a7b40d2f478abdbe (patch) | |
| tree | d5144d3e61af6632cbc13069555e71bc35e4a7b0 | |
| parent | f66fedcb723a9f118170200e21dbabb305f8c702 (diff) | |
| download | lwn-adb091846318f86e4f46c7d6a7b40d2f478abdbe.tar.gz lwn-adb091846318f86e4f46c7d6a7b40d2f478abdbe.zip | |
perf symbols: 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.
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>
| -rw-r--r-- | tools/perf/util/symbol.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 469c0264ed29..bb5d32f38af2 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); |