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From: "agentzh at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: systemtap@sourceware.org
Subject: [Bug runtime/31051] New: Error handling is incomplete in the early
 uprobe registration code
Date: Sat, 11 Nov 2023 05:50:35 +0000
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X-Bugzilla-Product: systemtap
X-Bugzilla-Component: runtime
X-Bugzilla-Version: unspecified
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X-Bugzilla-Who: agentzh at gmail dot com
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X-Bugzilla-Priority: P2
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D31051

            Bug ID: 31051
           Summary: Error handling is incomplete in the early uprobe
                    registration code
           Product: systemtap
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: runtime
          Assignee: systemtap at sourceware dot org
          Reporter: agentzh at gmail dot com
  Target Milestone: ---

Systemtap 5.0 introduced the early uprobe registration (module init time) a=
s a
performance optimization. Unfortunately, it does not handle the errors very
well. For example, when uprobe_register() failed, there would be memory lea=
ks
and leftover uprobes (resulting in kernel panics).

I'll prepare a patch to address this new regression.

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