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ftrace: Fix function tracing recursion self test 

The function tracing recursion self test should not crash
the machine if the resursion test fails. If it detects that
the function tracing is recursing when it should not be, then
bail, don't go into an infinite recursive loop.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt 2012-11-02 17:01:20 -04:00 committed by Steven Rostedt
parent 6350379452
commit 9640388b63
1 changed files with 2 additions and 1 deletions
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3
kernel/trace/trace_selftest.c
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@ -415,7 +415,8 @@ static void trace_selftest_test_recursion_func(unsigned long ip,
* The ftrace infrastructure should provide the recursion
* protection. If not, this will crash the kernel!
*/
trace_selftest_recursion_cnt++;
if (trace_selftest_recursion_cnt++ > 10)
return;
DYN_FTRACE_TEST_NAME();
}