From: "Steven Rostedt (VMware)" <>

Al Viro discovered a bug in the glob ftrace filtering code where "*a*b" is
treated the same as "a*b", and functions that would be selected by "*a*b"
but not "a*b" are not selected with "*a*b".

Add tests for patterns "*a*b" and "a*b*" to the glob selftest.


Cc: Shuah Khan <>
Acked-by: Masami Hiramatsu <>
Signed-off-by: Steven Rostedt (VMware) <>
 tools/testing/selftests/ftrace/test.d/ftrace/ | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/ 
index 589d52b211b7..27a54a17da65 100644
--- a/tools/testing/selftests/ftrace/test.d/ftrace/
+++ b/tools/testing/selftests/ftrace/test.d/ftrace/
@@ -29,6 +29,12 @@ ftrace_filter_check '*schedule*' '^.*schedule.*$'
 # filter by *, end match
 ftrace_filter_check 'schedule*' '^schedule.*$'
+# filter by *mid*end
+ftrace_filter_check '*aw*lock' '.*aw.*lock$'
+# filter by start*mid*
+ftrace_filter_check 'mutex*try*' '^mutex.*try.*'
 # Advanced full-glob matching feature is recently supported.
 # Skip the tests if we are sure the kernel does not support it.
 if grep -q 'accepts: .* glob-matching-pattern' README ; then

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