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ftrace: Test for NULL iter->tr in regex for stack_trace_filter changes
authorSteven Rostedt (VMware) <rostedt@goodmis.org>
Wed, 5 Jul 2017 13:45:43 +0000 (09:45 -0400)
committerSteven Rostedt (VMware) <rostedt@goodmis.org>
Wed, 5 Jul 2017 13:52:18 +0000 (09:52 -0400)
commitcb1db8161a25ec416d592cc68e4443ba3525b890
treebfca8b6145348c973eb6c880e614c22a6a2065e0tree | snapshot
parentb9ff075068066d22418ee7d522d69d17a1ea8f1bcommit | diff
ftrace: Test for NULL iter->tr in regex for stack_trace_filter changes

As writing into stack_trace_filter, the iter-tr is not set and is NULL.
Check if it is NULL before dereferencing it in ftrace_regex_release().

Fixes: eb5367924d0c ("ftrace: Have cached module filters be an active filter")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
kernel/trace/ftrace.c diff | blob | history
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