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| author | Steven Rostedt <srostedt@redhat.com> | 2013-01-24 07:52:34 -0500 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2013-01-24 07:52:34 -0500 |
| commit | d41032a83b4683481cadff84bbf8e0eafeaba830 (patch) | |
| tree | ba1d406d54fca1bf2be8a554d868633678e07aa8 | |
| parent | 0b07436d95b5404134da4d661fd183eac863513e (diff) | |
| download | linux-d41032a83b4683481cadff84bbf8e0eafeaba830.tar.gz linux-d41032a83b4683481cadff84bbf8e0eafeaba830.tar.bz2 linux-d41032a83b4683481cadff84bbf8e0eafeaba830.zip | |
tracing: Fix unsigned int compare of zero in recursion check
Dan's smatch found a compare bug with the result of the
trace_test_and_set_recursion() and comparing to less than
zero. If the function fails, it returns -1, but was saved in
an unsigned int, which will never be less than zero and will
ignore the result of the test if a recursion did happen.
Luckily this is the last of the recursion tests, as the
infrastructure of ftrace would catch recursions before it
got here, except for some few exceptions.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| -rw-r--r-- | kernel/trace/trace_functions.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/trace_functions.c b/kernel/trace/trace_functions.c index 1c327ef13a9a..601152523326 100644 --- a/kernel/trace/trace_functions.c +++ b/kernel/trace/trace_functions.c @@ -61,7 +61,7 @@ function_trace_call(unsigned long ip, unsigned long parent_ip, struct trace_array *tr = func_trace; struct trace_array_cpu *data; unsigned long flags; - unsigned int bit; + int bit; int cpu; int pc; |