diff options
| author | Namhyung Kim <[email protected]> | 2014-11-18 13:30:28 +0900 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <[email protected]> | 2014-11-24 18:03:48 -0300 |
| commit | 330dfa224fcc8594977785a6493ca06d124f0cfe (patch) | |
| tree | 8a4eb078bf0eb523cdf857f0eb829c8d5903de44 | |
| parent | 85c116a6cb91a5c09b7a6c95ffc6a6cbd32cd237 (diff) | |
perf tools: Fix segfault due to invalid kernel dso access
Jiri reported that the commit 96d78059d6d9 ("perf tools: Make vmlinux
short name more like kallsyms short name") segfaults on perf script.
When processing kernel mmap event, it should access the 'kernel'
variable as sometimes it cannot find a matching dso from build-id table
so 'dso' might be invalid.
Reported-by: Jiri Olsa <[email protected]>
Tested-by: Jiri Olsa <[email protected]>
Signed-off-by: Namhyung Kim <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
| -rw-r--r-- | tools/perf/util/machine.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c index d97309c87bd6..b75b487574c7 100644 --- a/tools/perf/util/machine.c +++ b/tools/perf/util/machine.c @@ -1106,8 +1106,8 @@ static int machine__process_kernel_mmap_event(struct machine *machine, if (__machine__create_kernel_maps(machine, kernel) < 0) goto out_problem; - if (strstr(dso->long_name, "vmlinux")) - dso__set_short_name(dso, "[kernel.vmlinux]", false); + if (strstr(kernel->long_name, "vmlinux")) + dso__set_short_name(kernel, "[kernel.vmlinux]", false); machine__set_kernel_mmap_len(machine, event); |