[Bug 259380] linux(4): linux_recvfrom(2) fails: linux_recvfrom -1 errno -22 Invalid argument

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=259380

--- Comment #9 from Jason Mader <jasonmader@gmail.com> ---
Created attachment 229379
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=229379&action=edit
revert linux_recvfrom() in linux_socket.c

After adding some debugging statements into linux_recvfrom(), I found that the
error happens here,

        error = kern_recvit(td, args->s, &msg, UIO_SYSSPACE, NULL);
        if (error != 0)
                goto out;

The value in error that is returned is: 54

I'm attaching a diff that reverts FreeBSD 12.3-BETA3 linux_socket.c to 12.1 and
works for the Linux binaries, though I don't yet understand what the critical
difference is to linux_recvfrom().

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