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authorSteven Rostedt (VMware) <rostedt@goodmis.org>2019-08-28 15:05:28 -0400
committerArnaldo Carvalho de Melo <acme@redhat.com>2019-08-29 08:36:12 -0300
commitb0215e2d6a18d8331b2d4a8b38ccf3eff783edb1 (patch)
tree5d7ede7efab7142f7132a71ad67e00c4418c76a2
parentb397f8468fa27f08b83b348ffa56a226f72453af (diff)
downloadlinux-b0215e2d6a18d8331b2d4a8b38ccf3eff783edb1.tar.bz2
tools lib traceevent: Do not free tep->cmdlines in add_new_comm() on failure
If the re-allocation of tep->cmdlines succeeds, then the previous allocation of tep->cmdlines will be freed. If we later fail in add_new_comm(), we must not free cmdlines, and also should assign tep->cmdlines to the new allocation. Otherwise when freeing tep, the tep->cmdlines will be pointing to garbage. Fixes: a6d2a61ac653a ("tools lib traceevent: Remove some die() calls") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: linux-trace-devel@vger.kernel.org Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/20190828191819.970121417@goodmis.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r--tools/lib/traceevent/event-parse.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index b36b536a9fcb..13fd9fdf91e0 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -269,10 +269,10 @@ static int add_new_comm(struct tep_handle *tep,
errno = ENOMEM;
return -1;
}
+ tep->cmdlines = cmdlines;
cmdlines[tep->cmdline_count].comm = strdup(comm);
if (!cmdlines[tep->cmdline_count].comm) {
- free(cmdlines);
errno = ENOMEM;
return -1;
}
@@ -283,7 +283,6 @@ static int add_new_comm(struct tep_handle *tep,
tep->cmdline_count++;
qsort(cmdlines, tep->cmdline_count, sizeof(*cmdlines), cmdline_cmp);
- tep->cmdlines = cmdlines;
return 0;
}