From c27899b15bca6188d34c0b87b3389eeda2a90cb5 Mon Sep 17 00:00:00 2001

From: Jerome Marchand <jmarchan@redhat.com>

Date: Mon, 9 Jan 2023 18:17:20 +0100

Subject: [PATCH] Fix get_kprobe_functions

get_kprobe_functions will not only return a function that matches the

regular expression, but also any function that starts with a

substrings that matches it. This is obviously not the intended

behavior.

The issue is easily fixed by replacing re.match by re.fullmatch.

---

 src/python/bcc/__init__.py | 2 +-

 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/python/bcc/__init__.py b/src/python/bcc/__init__.py

index 7175b98e..970ddcc2 100644

--- a/src/python/bcc/__init__.py

+++ b/src/python/bcc/__init__.py

@@ -745,7 +745,7 @@ DEBUG_BTF = 0x20

                 # Exclude all gcc 8's extra .cold functions

                 elif re.match(b'^.*\.cold(\.\d+)?$', fn):

                     continue

-                if (t.lower() in [b't', b'w']) and re.match(event_re, fn) \

+                if (t.lower() in [b't', b'w']) and re.fullmatch(event_re, fn) \

                     and fn not in blacklist:

                     fns.append(fn)

         return set(fns)     # Some functions may appear more than once

-- 

2.38.1