From: "tip-bot2 for Steven Rostedt (VMware)" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: "Steven Rostedt (VMware)" <rostedt@goodmis.org>,
Andrew Morton <akpm@linux-foundation.org>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
linux-trace-devel@vger.kernel.org, stable@vger.kernel.org,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Ingo Molnar <mingo@kernel.org>, Borislav Petkov <bp@alien8.de>,
linux-kernel@vger.kernel.org
Subject: [tip: perf/core] tools lib traceevent: Do not free tep->cmdlines in add_new_comm() on failure
Date: Thu, 29 Aug 2019 19:02:03 -0000 [thread overview]
Message-ID: <156710532322.10616.13881273316209901553.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20190828191819.970121417@goodmis.org>
The following commit has been merged into the perf/core branch of tip:
Commit-ID: b0215e2d6a18d8331b2d4a8b38ccf3eff783edb1
Gitweb: https://git.kernel.org/tip/b0215e2d6a18d8331b2d4a8b38ccf3eff783edb1
Author: Steven Rostedt (VMware) <rostedt@goodmis.org>
AuthorDate: Wed, 28 Aug 2019 15:05:28 -04:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 29 Aug 2019 08:36:12 -03:00
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>
---
tools/lib/traceevent/event-parse.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index b36b536..13fd9fd 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;
}
next prev parent reply other threads:[~2019-08-29 19:02 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-28 19:05 [PATCH 0/2] tools lib traceevent: Fixes for adding tasks to the tep descriptor Steven Rostedt
2019-08-28 19:05 ` [PATCH 1/2] tools lib traceevent: Do not free tep->cmdlines in add_new_comm() on failure Steven Rostedt
2019-08-29 19:02 ` tip-bot2 for Steven Rostedt (VMware) [this message]
2019-08-28 19:05 ` [PATCH 2/2] tools lib traceevent: Remove unneeded qsort and uses memmove instead Steven Rostedt
2019-08-29 19:02 ` [tip: perf/core] " tip-bot2 for Steven Rostedt (VMware)
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