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| author |   Steven Rostedt (VMware) <rostedt@goodmis.org> | 2019-08-28 15:05:28 -0400 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-08-29 08:36:12 -0300 |
| commit | b0215e2d6a18d8331b2d4a8b38ccf3eff783edb1 (patch) | |
| tree | 5d7ede7efab7142f7132a71ad67e00c4418c76a2 /tools/lib | |
| parent | perf evlist: Use unshare(CLONE_FS) in sb threads to let setns(CLONE_NEWNS) work (diff) | |
| download | wireguard-linux-b0215e2d6a18d8331b2d4a8b38ccf3eff783edb1.tar.xz wireguard-linux-b0215e2d6a18d8331b2d4a8b38ccf3eff783edb1.zip | |
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>
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/traceevent/event-parse.c | 3 |
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; } |