Kernel paging dump on 2.4.18

Kernel paging dump on 2.4.18

[Rob Dege]

I'm running RedHat 7.2 w/2.4.18 as a dedicated file server prmailily for
Linux & alpha machines.  I've been getting kernel paging faults, and don't
know what's causing it.  The odd thing is that the kernel error only affects
NFS.  Everything else is stable, and usable.  here's the dump from
/var/log/messages:

Apr 17 09:25:35 mars kernel: Unable to handle kernel paging request at
virtual address a3af6fb0
Apr 17 09:25:35 mars kernel:  printing eip:
Apr 17 09:25:35 mars kernel: c027466a
Apr 17 09:25:35 mars kernel: *pde = 00000000
Apr 17 09:25:35 mars kernel: Oops: 0002
Apr 17 09:25:35 mars kernel: CPU:    0
Apr 17 09:25:35 mars kernel: EIP:    0010:[xdr_encode_netobj+26/112]    Not
tainted
Apr 17 09:25:35 mars kernel: EIP:    0010:[<c027466a>]    Not tainted
Apr 17 09:25:35 mars kernel: EFLAGS: 00010217
Apr 17 09:25:35 mars kernel: eax: 3733cfd4   ebx: c6e03060   ecx: 01000000
edx: c6e03060
Apr 17 09:25:35 mars kernel: esi: dc4ff480   edi: c6e0304c   ebp: c6726064
esp: de149d80
Apr 17 09:25:35 mars kernel: ds: 0018   es: 0018   ss: 0018
Apr 17 09:25:35 mars kernel: Process lockd (pid: 751, stackpage=de149000)
Apr 17 09:25:35 mars kernel: Stack: 0d000000 de149dbc c0183eff c18076e0
c672606c dc4ff480 c6e0304c c6e03060
Apr 17 09:25:35 mars kernel:        c018fbd9 c6e03060 c6726064 00000085
de148000 c672606c ca1da2c0 c0190570
Apr 17 09:25:35 mars kernel:        ca1da540 c027134a ccb3805c dc4ff480
c0190570 ca1da540 c0190582 c6e0304c
Apr 17 09:25:35 mars kernel: Call Trace: [nlm_fopen+175/224]
[nlm4_encode_testres+137/528] [nlm4clt_encode_testres+0/48] [rpca
uth_marshcred+74/80] [nlm4clt_encode_testres+0/48]
Apr 17 09:25:35 mars kernel: Call Trace: [<c0183eff>] [<c018fbd9>]
[<c0190570>] [<c027134a>] [<c0190570>]
Apr 17 09:25:35 mars kernel:    [nlm4clt_encode_testres+18/48]
[call_encode+203/256] [__rpc_execute+169/704] [rpc_call_setup+5
9/112] [rpc_call_async+118/160] [nlmsvc_async_call+120/144]
Apr 17 09:25:35 mars kernel:    [<c0190582>] [<c026c4db>] [<c026fb19>]
[<c026c15b>] [<c026c0f6>] [<c018a6b8>]
Apr 17 09:25:35 mars kernel:    [nlm4svc_callback_exit+0/80]
[nlm4svc_callback+114/160] [nlm4svc_callback_exit+0/80] [nlm4svc_
proc_test_msg+67/80] [handle_IRQ_event+57/96] [net_rx_action+312/528]
Apr 17 09:25:35 mars kernel:    [<c0190f60>] [<c0190f32>] [<c0190f60>]
[<c0190a73>] [<c0107fa9>] [<c02383c8>]
Apr 17 09:25:35 mars kernel:    [schedule+737/784] [nlm4_decode_lock+70/256]
[nlm4_decode_lock+91/256] [nlm4svc_decode_testarg
s+44/112] [svc_process+703/1248] [lockd+400/592]
Apr 17 09:25:35 mars kernel:    [<c010f941>] [<c018f8f6>] [<c018f90b>]
[<c018fddc>] [<c02720cf>] [<c018b800>]
Apr 17 09:25:35 mars kernel:    [kernel_thread+38/48] [lockd+0/592]
Apr 17 09:25:35 mars kernel:    [<c0105536>] [<c018b670>]
Apr 17 09:25:35 mars kernel:
Apr 17 09:25:35 mars kernel: Code: c7 04 83 00 00 00 00 8b 45 00 0f c8 89 02
8b 45 00 83 c3 04


Any Help is appreciated.

-Rob


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Re: Kernel paging dump on 2.4.18

[Trond Myklebust]

>>>>> " " == Rob Dege <rcd@amherst.com> writes:

     > I'm running RedHat 7.2 w/2.4.18 as a dedicated file server
     > prmailily for Linux & alpha machines.  I've been getting kernel
     > paging faults, and don't know what's causing it.  The odd thing
     > is that the kernel error only affects NFS.  Everything else is
     > stable, and usable.  here's the dump from /var/log/messages:

That looks like a bug I fixed a long time ago in 2.2.x. Does the
following patch help?

Cheers,
  Trond

diff -u --recursive --new-file linux-2.4.18/fs/lockd/svc4proc.c linux-2.4.18-fix_lock/fs/lockd/svc4proc.c
--- linux-2.4.18/fs/lockd/svc4proc.c	Mon Oct  1 22:45:47 2001
+++ linux-2.4.18-fix_lock/fs/lockd/svc4proc.c	Tue Apr 23 11:00:59 2002
@@ -254,6 +254,7 @@
 
 	dprintk("lockd: TEST_MSG      called\n");
 
+	memset(&res, 0, sizeof(res));
 	if ((stat = nlm4svc_proc_test(rqstp, argp, &res)) == 0)
 		stat = nlm4svc_callback(rqstp, NLMPROC_TEST_RES, &res);
 	return stat;
diff -u --recursive --new-file linux-2.4.18/fs/lockd/svcproc.c linux-2.4.18-fix_lock/fs/lockd/svcproc.c
--- linux-2.4.18/fs/lockd/svcproc.c	Thu Oct 11 16:52:18 2001
+++ linux-2.4.18-fix_lock/fs/lockd/svcproc.c	Tue Apr 23 11:01:10 2002
@@ -282,6 +282,7 @@
 
 	dprintk("lockd: TEST_MSG      called\n");
 
+	memset(&res, 0, sizeof(res));
 	if ((stat = nlmsvc_proc_test(rqstp, argp, &res)) == 0)
 		stat = nlmsvc_callback(rqstp, NLMPROC_TEST_RES, &res);
 	return stat;

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