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: 591dffda ("ftrace: Allow for function tracing instance to filter functions") Signed-off-by: NSteven Rostedt (VMware) <rostedt@goodmis.org>
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