[Bug libc/27790] New: _dl_call_libc_early_init: Assertion `sym != NULL' failed

[Bug libc/27790] New: _dl_call_libc_early_init: Assertion `sym != NULL' failed

[tuliom at ascii dot art.br]

https://sourceware.org/bugzilla/show_bug.cgi?id=27790

            Bug ID: 27790
           Summary: _dl_call_libc_early_init: Assertion `sym != NULL'
                    failed
           Product: glibc
           Version: 2.32
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: tuliom at ascii dot art.br
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

This bug has been originally reported at:
https://github.com/rust-lang/libc/issues/2054

I'm going to quote Jackob:

This is reproducible without Rust:

#include <stdio.h>
#include <stdlib.h>
#include <pty.h>

int main() {
        int* child = malloc(sizeof(int));
        int* parent = malloc(sizeof(int));
        int p = openpty(parent, child, 0, 0, 0);
        printf("p:%d\n", p);
        free(child);
        free(parent);
}

built with gcc openpty.c -lutil -static on a 2.32 system and run on 2.31:

a.out: dl-call-libc-early-init.c:37: _dl_call_libc_early_init: Assertion `sym
!= NULL' failed.
Aborted (core dumped)

---

Interestingly, I can't reproduce this issue when the binary is statically
linked against glibc 2.33 and executed on 2.31.

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[Bug libc/27790] _dl_call_libc_early_init: Assertion `sym != NULL' failed

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27790

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |fweimer at redhat dot com
         Resolution|---                         |WONTFIX

--- Comment #1 from Florian Weimer <fweimer at redhat dot com> ---
openpty calls dlopen under the covers, and static dlopen across glibc versions
is not supportable.

In glibc 2.33, openpty no longer tries to change file system permissions, so no
call into NSS is needed, and no dlopen happens.

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[Bug libc/27790] _dl_call_libc_early_init: Assertion `sym != NULL' failed

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27790

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://sourceware.org/bugz
                   |                            |illa/show_bug.cgi?id=24941

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