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Date:      Wed, 27 Nov 2019 14:22:39 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 241639] Fatal trap 12: page fault ... current process = 0 (vmbusdev) when using mlx4en
Message-ID:  <bug-241639-227-WQZigNuDsH@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-241639-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-241639-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D241639

--- Comment #36 from Konstantin Belousov <kib@FreeBSD.org> ---
(In reply to Michael from comment #35)
Sigh, try this

diff --git a/sys/kern/kern_linker.c b/sys/kern/kern_linker.c
index 6dc21886066..ed6a8f793ea 100644
--- a/sys/kern/kern_linker.c
+++ b/sys/kern/kern_linker.c
@@ -1066,6 +1066,9 @@ kern_kldload(struct thread *td, const char *file, int
*fileid)
        if ((error =3D priv_check(td, PRIV_KLD_LOAD)) !=3D 0)
                return (error);

+       if (td->td_proc->p_fd->fd_rdir =3D=3D NULL)
+               return (EINVAL);
+
        /*
         * It is possible that kldloaded module will attach a new ifnet,
         * so vnet context must be set when this ocurs.

--=20
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