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| author | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-12-10 23:58:01 -0500 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-12-11 13:50:28 -0500 |
| commit | 2840f84f74035e5a535959d5f17269c69fa6edc5 (patch) | |
| tree | d34045c522b96a57bd2ca29c089cf6df8d9d6b6e | |
| parent | 3cec638b3d793b7cacdec5b8072364b41caeb0e1 (diff) | |
| download | linux-2840f84f74035e5a535959d5f17269c69fa6edc5.tar.gz | |
tracing: Fix memory leak of instance function hash filters
The following commands will cause a memory leak:
# cd /sys/kernel/tracing
# mkdir instances/foo
# echo schedule > instance/foo/set_ftrace_filter
# rmdir instances/foo
The reason is that the hashes that hold the filters to set_ftrace_filter and
set_ftrace_notrace are not freed if they contain any data on the instance
and the instance is removed.
Found by kmemleak detector.
Cc: stable@vger.kernel.org
Fixes: 591dffdade9f ("ftrace: Allow for function tracing instance to filter functions")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
| -rw-r--r-- | kernel/trace/ftrace.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 77734451cb05d..e23eb9fc77aa9 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -5460,6 +5460,7 @@ void ftrace_destroy_filter_files(struct ftrace_ops *ops) if (ops->flags & FTRACE_OPS_FL_ENABLED) ftrace_shutdown(ops, 0); ops->flags |= FTRACE_OPS_FL_DELETED; + ftrace_free_filter(ops); mutex_unlock(&ftrace_lock); } |