From: Jiri Olsa <[email protected]> The branch field sorting code assumes hist_entry::branch_info is allocated, which is wrong and following perf session ends up with report segfault.
$ perf record ls $ perf report -F in_tx perf: Segmentation fault Checking that hist_entry::branch_info is valid and display "N/A" string in snprint callback if it's not. Signed-off-by: Jiri Olsa <[email protected]> Acked-by: Namhyung Kim <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Corey Ashford <[email protected]> Cc: David Ahern <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: Ingo Molnar <[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]> --- tools/perf/util/sort.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c index 82241fe54e4b..9bcdb57076b8 100644 --- a/tools/perf/util/sort.c +++ b/tools/perf/util/sort.c @@ -1021,6 +1021,9 @@ struct sort_entry sort_abort = { static int64_t sort__in_tx_cmp(struct hist_entry *left, struct hist_entry *right) { + if (!left->branch_info || !right->branch_info) + return cmp_null(left->branch_info, right->branch_info); + return left->branch_info->flags.in_tx != right->branch_info->flags.in_tx; } @@ -1028,10 +1031,14 @@ sort__in_tx_cmp(struct hist_entry *left, struct hist_entry *right) static int hist_entry__in_tx_snprintf(struct hist_entry *he, char *bf, size_t size, unsigned int width) { - static const char *out = "."; + static const char *out = "N/A"; - if (he->branch_info->flags.in_tx) - out = "T"; + if (he->branch_info) { + if (he->branch_info->flags.in_tx) + out = "T"; + else + out = "."; + } return repsep_snprintf(bf, size, "%-*s", width, out); } -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
