DL-Mirrors/kernel-tenderloin-3.0
0
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

perf symbols: Fix ppc64 SEGV in dso__load_sym with debuginfo files

Browse Source 
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>
This commit is contained in:
Anton Blanchard
2011-08-24 16:40:14 +10:00
committed by Greg Kroah-Hartman
parent 99904bf394
commit 8413239bfc
1 changed files with 2 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
tools/perf/util/symbol.c
View File

@@ -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); opdsec = elf_section_by_name(elf, &ehdr, &opdshdr, ".opd", &opdidx);
if (opdshdr.sh_type != SHT_PROGBITS)
opdsec = NULL;
if (opdsec) if (opdsec)
opddata = elf_rawdata(opdsec, NULL); opddata = elf_rawdata(opdsec, NULL);