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tools lib traceevent: Do not free tep->cmdlines in add_new_comm() on failure
[ Upstream commit e0d2615856b2046c2e8d5bfd6933f37f69703b0b ]
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: a6d2a61ac6
("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
parent
d1e4b4cc3b
commit
140acbb093
1 changed files with 1 additions and 2 deletions
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@ -254,10 +254,10 @@ static int add_new_comm(struct tep_handle *pevent, const char *comm, int pid)
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errno = ENOMEM;
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return -1;
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}
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pevent->cmdlines = cmdlines;
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cmdlines[pevent->cmdline_count].comm = strdup(comm);
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if (!cmdlines[pevent->cmdline_count].comm) {
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free(cmdlines);
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errno = ENOMEM;
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return -1;
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}
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@ -268,7 +268,6 @@ static int add_new_comm(struct tep_handle *pevent, const char *comm, int pid)
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pevent->cmdline_count++;
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qsort(cmdlines, pevent->cmdline_count, sizeof(*cmdlines), cmdline_cmp);
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pevent->cmdlines = cmdlines;
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return 0;
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}
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