[Bug 253081] fdlopen is broken in STABLE-12

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253081

--- Comment #2 from commit-hook at FreeBSD.org ---
A commit in branch main references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=43d44842aef3972cc86ce673e84e31f372257b15

commit 43d44842aef3972cc86ce673e84e31f372257b15
Author:     David Chisnall <theraven at FreeBSD.org>
AuthorDate: 2021-02-02 14:06:33 +0000
Commit:     Konstantin Belousov <kib at FreeBSD.org>
CommitDate: 2021-02-02 14:14:16 +0000

    rtld: Fix null-pointer dereference

    When a library is opened via fdlopen, it has a null pointer for its path
    and so _rtld_bind can crash as a result of passing the null pointer to
    basename() (which passes it to strrchr(), which doesn't do a null check).

    PR:     253081
    Submitted by:   theraven
    MFC after:      1 week
    Differential Revision:  https://reviews.freebsd.org/D28442

 libexec/rtld-elf/rtld.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

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