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From: "fweimer at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug dynamic-link/29528] New: __libc_early_init not called after
 dlmopen
Date: Fri, 26 Aug 2022 11:22:22 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
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X-Bugzilla-Product: glibc
X-Bugzilla-Component: dynamic-link
X-Bugzilla-Version: 2.37
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X-Bugzilla-Severity: normal
X-Bugzilla-Who: fweimer at redhat dot com
X-Bugzilla-Status: NEW
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X-Bugzilla-Priority: P2
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29528

            Bug ID: 29528
           Summary: __libc_early_init not called after dlmopen
           Product: glibc
           Version: 2.37
            Status: NEW
          Severity: normal
          Priority: P2
         Component: dynamic-link
          Assignee: unassigned at sourceware dot org
          Reporter: fweimer at redhat dot com
  Target Milestone: ---
             Flags: security-

The libc_map member of the namespace is never set to NULL after the namespa=
ce
has been used. This means that dlmopen/dlclose/dlmopen sequence results in =
an
inner libc that is not initialized correctly. The most obvious problem is t=
hat
<ctype.h> functions such as isalpha crash.

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