| commit | 372e0d01da71c84dcecf7028598a33813b0d5256 | [log] [tgz] |
|---|---|---|
| author | Steven Rostedt (VMware) <rostedt@goodmis.org> | Fri Aug 30 16:30:01 2019 -0400 |
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | Fri Aug 30 16:30:01 2019 -0400 |
| tree | 3aa1bf6e2a344b91cc5078abc4fa982f479e914a | |
| parent | 7bd46644ea0f6021dc396a39a8bfd3a58f6f1f9f [diff] |
ftrace: Check for empty hash and comment the race with registering probes
The race between adding a function probe and reading the probes that exist
is very subtle. It needs a comment. Also, the issue can also happen if the
probe has has the EMPTY_HASH as its func_hash.
Cc: stable@vger.kernel.org
Fixes: 7b60f3d876156 ("ftrace: Dynamically create the probe ftrace_ops for the trace_array")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>