Re: Please try knfsd-981010

H.J. Lu (hjl@lucon.org)
Sun, 11 Oct 1998 18:59:45 -0700 (PDT)

>
>
>
> On Sat, 10 Oct 1998, H.J. Lu wrote:
>
> > This is the Linux kernel NFS daemon. It is based on linux-nfs 0.4.22.
> > It is tested on Linux/alpha and Linux/x86 running glibc 2.0.7.
> >
>
> HJ,
>
> I built and installed knfsd-981010 and kernel 2.1.125 + nfs-related
> patches. Initially, it seemed as if all was well, however there are
> severe problems when mounting from an Alpha box. The mount will succeed,
> but rpc.kmountd exits without fanfare (and without coredump nor log
> messages) immediately after. From that point on, even after stopping and
> restarting the knfs subsystem, anything that tickles kmountd (including
> 'showmount') causes to it to disappear immediately.

Can you do me a favor by running gdb on mountd? You can do

1. Start mountd
2.

# gdb the_mountd_binary_from_src_dir

3.
(gdb) att pid_of_mountd
(gdb) continue

4. Mount the server from client.

5. gdb should stop mountd and you do

(gdb) bt

I need the output from gdb's backstrace.

>
> The only recovery seems to be by forcibly zeroing out the
> /var/lib/nfs/xtab and rmtab files and restarting.
>
> The problem is only occuring on a server which routes between two subnets,
> if that is any help. I'd love to send log messages but, again, there are
> none.
>
>

Could you please try this patch?

Thanks.

-- 
H.J. Lu (hjl@gnu.org)
-----
Index: auth.c
===================================================================
RCS file: /home/work/cvs/linux/knfsd/utils/mountd/auth.c,v
retrieving revision 1.7
diff -u -p -r1.7 auth.c
--- auth.c	1998/10/10 23:57:25	1.7
+++ auth.c	1998/10/12 01:54:56
@@ -70,11 +70,15 @@ auth_authenticate_internal(char *what, s
 	if (!(exp = export_find(*hpp, path))) {
 		xlog(L_WARNING, "refused %s request from %s: no export entry",
 				what, (*hpp)->h_name);
+		free (*hpp)
+		*hpp = NULL;
 		return NULL;
 	}
 	if (!exp->m_mayexport) {
 		xlog(L_WARNING, "refused %s request from %s: not exported",
 				what, (*hpp)->h_name);
+		free (*hpp)
+		*hpp = NULL;
 		return NULL;
 	}
 
@@ -83,6 +87,8 @@ auth_authenticate_internal(char *what, s
 	     ntohs(caller->sin_port) >= IPPORT_RESERVED)) {
 		xlog(L_WARNING, "refused %s request from %s: illegal port %d",
 				what, (*hpp)->h_name, ntohs(caller->sin_port));
+		free (*hpp)
+		*hpp = NULL;
 		return NULL;
 	}
 
@@ -128,6 +134,8 @@ auth_authenticate(char *what, struct soc
 		if (p == epath) p++;
 		*p = '\0';
 	}
+	if (hp)
+		free (hp);
 	return exp;
 }
 


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