[Bug dynamic-link/29446] New: __dlopen now ignores dl_caller argument

[Bug dynamic-link/29446] New: __dlopen now ignores dl_caller argument

[keno at juliacomputing dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=29446

            Bug ID: 29446
           Summary: __dlopen now ignores dl_caller argument
           Product: glibc
           Version: 2.34
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: dynamic-link
          Assignee: unassigned at sourceware dot org
          Reporter: keno at juliacomputing dot com
  Target Milestone: ---

In commit 0c1c3a77 ("dlfcn: Move dlopen into libc"),
the previous __dlopen symbol was renamed dlopen_implementation,
and moved into libc. After this commit, __dlopen is now:
```
void *
__dlopen (const char *file, int mode, void *dl_caller)
{
  return dlopen_implementation (file, mode, RETURN_ADDRESS (0));
}
```
This seems like it may be a bug, because the `dl_caller`
argument to `__dlopen` is now ignored. I don't have a concrete
case where this causes any problems, this was just noticed by
inspection, but it looked wrong.

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[Bug dynamic-link/29446] __dlopen now ignores dl_caller argument

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=29446

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |ASSIGNED
              Flags|                            |security-
                 CC|                            |fweimer at redhat dot com
           Assignee|unassigned at sourceware dot org   |fweimer at redhat dot com
   Last reconfirmed|                            |2022-08-04

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[Bug dynamic-link/29446] __dlopen now ignores dl_caller argument in static mode

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=29446

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|__dlopen now ignores        |__dlopen now ignores
                   |dl_caller argument          |dl_caller argument in
                   |                            |static mode

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[Bug dynamic-link/29446] __dlopen now ignores dl_caller argument in static mode

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=29446

--- Comment #1 from Florian Weimer <fweimer at redhat dot com> ---
Patch posted:

[PATCH] dlfcn: Pass caller pointer to static dlopen implementation (bug 29446)
<https://sourceware.org/pipermail/libc-alpha/2022-August/141233.html>

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