syzbot suspects this issue was fixed by commit:

commit af0efa050caa66e8f304c42c94c76cb6c480cb7e
Author: Toke Høiland-Jørgensen [off-list ref]
Date:   Tue Jul 6 12:23:55 2021 +0000

    libbpf: Restore errno return for functions that were already returning it

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=13b872fa300000
start commit:   3dbdb38e2869 Merge branch 'for-5.14' of git://git.kernel.o..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=a1fcf15a09815757
dashboard link: https://syzkaller.appspot.com/bug?extid=2f816ba9b71ca9a8e6b0
userspace arch: i386
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=151ee572300000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: libbpf: Restore errno return for functions that were already returning it

For information about bisection process see: https://goo.gl/tpsmEJ#bisection