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| author |   Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2014-07-24 11:26:11 -0400 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2014-07-24 11:26:11 -0400 |
| commit | dc6f03f26f570104a2bb03f9d1deb588026d7c75 (patch) | |
| tree | d2834b5e90000dee36132694395e0911e6c3f16e | |
| parent | ftrace: Fix trampoline hash update check on rec->flags (diff) | |
| download | linux-dev-dc6f03f26f570104a2bb03f9d1deb588026d7c75.tar.xz linux-dev-dc6f03f26f570104a2bb03f9d1deb588026d7c75.zip | |
ftrace: Add warning if tramp hash does not match nr_trampolines
After adding all the records to the tramp_hash, add a check that makes
sure that the number of records added matches the number of records
expected to match and do a WARN_ON and disable ftrace if they do
not match.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| -rw-r--r-- | kernel/trace/ftrace.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 6ef1989c2b2e..979bd8cb4349 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -2226,6 +2226,9 @@ static int ftrace_save_ops_tramp_hash(struct ftrace_ops *ops) } } while_for_each_ftrace_rec(); + /* The number of recs in the hash must match nr_trampolines */ + FTRACE_WARN_ON(ops->tramp_hash->count != ops->nr_trampolines); + return 0; } |