Bug 16190

Summary: Kernel Oops: Unable to handle NULL pointer dereference
Product: [Retired] Red Hat Linux Reporter: elliot <rreed>
Component: kernelAssignee: Michael K. Johnson <johnsonm>
Status: CLOSED WORKSFORME QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: 6.2   
Target Milestone: ---   
Target Release: ---   
Hardware: i686   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2002-12-15 01:08:04 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description Flags
Ksymoops output file none

Description elliot 2000-08-14 20:15:40 UTC 
Receiving periodic Oops in kernel.  nfsd is always involved.  Cannot gracefully reboot system when this happens and resort to power off/on.  
Running kernel 2.2.14-6.1.1smp, as shipped with Dell PowerEdge 2450.  The following is from the messages log file:

NOTE:  Preceding message immediately before the kernel message is always either an unmount or mount message as shown.

Aug  2 15:19:58 ono mountd[435]: authenticated unmount request from smadata:753 
for /usr2/sol/home/mailhot (/usr2/sol/home) 
Aug  2 15:20:14 ono kernel: Unable to handle kernel NULL pointer dereference at 
virtual address 00000008 
Aug  2 15:20:14 ono kernel: current->tss.cr3 = 00101000, %cr3 = 00101000 
Aug  2 15:20:14 ono kernel: *pde = 00000000 
Aug  2 15:20:14 ono kernel: Oops: 0000 
Aug  2 15:20:14 ono kernel: CPU:    1 
Aug  2 15:20:14 ono kernel: EIP:    0010:[nfsd:__insmod_nfsd_S.text_L30206+28170
/30548] 
Aug  2 15:20:14 ono kernel: EFLAGS: 00010286 
Aug  2 15:20:14 ono kernel: eax: 00000000   ebx: d7f95e00   ecx: 00000000   edx:
 d5ec001c 
Aug  2 15:20:14 ono kernel: esi: d7f95e00   edi: d5ec0014   ebp: d7f95e00   esp:
 c42bdf5c 
Aug  2 15:20:14 ono kernel: ds: 0018   es: 0018   ss: 0018 
Aug  2 15:20:14 ono kernel: Process nfsd (pid: 444, process nr: 21, stackpage=c4
2bd000) 
Aug  2 15:20:14 ono kernel: Stack: d5ec0014 e00a94c2 d7f95e00 d5ec001c df5a2c60 
d7f95ef4 e00b2b80 df5a2c9c  
Aug  2 15:20:14 ono kernel:        e009263c d7f95e00 d5ec0014 c42bc000 c42bc000 
00000001 d7f95e00 df5a2c60  
Aug  2 15:20:14 ono kernel:        e00b2ec0 00000001 00000002 000186a3 00000002 
d5ec0014 e00b2a2c 00000000  
Aug  2 15:20:14 ono kernel: Call Trace: [nfsd:__insmod_nfsd_S.text_L30206+1142/3
0548] [nfsd:__insmod_nfsd_S.data_L1220+352/1440] [nfsd:__insmod_nfsd_O/lib/modul
es/2.2.14-6.1.1smp/fs/nfsd.o_M38F6+-92612/76] [nfsd:__insmod_nfsd_S.data_L1220+1
184/1440] [nfsd:__insmod_nfsd_S.data_L1220+12/1440] [nfsd:__insmod_nfsd_S.text_L
30206+537/30548] [kernel_thread+35/48]  
Aug  2 15:20:14 ono kernel: Code: 8b 58 08 85 db 75 07 31 d2 e9 05 01 00 00 66 8
b 43 22 66 c1
Comment 1 Bill Nottingham 2000-08-14 21:19:27 UTC 
Can you run the oops through ksymoops?

Also, do you have the upgraded nfs-utils package installed?
Comment 2 elliot 2000-08-14 22:08:35 UTC 
I've attached a file called "oops" that contains the output from ksymoops.  
Also, we're running nfs-utils-0.1.6-2.  Thanks!
Comment 3 elliot 2000-08-14 22:15:16 UTC 
Created attachment 2484 [details]
Ksymoops output file
Comment 4 Michael K. Johnson 2000-08-16 17:05:01 UTC 
Have you tried the 2.2.16-3 errata kernel?  (I don't
know that it will fix it, but then I don't have a
complete list of bug fixes between 2.2.14 and 2.2.16
handy...)
Comment 5 elliot 2000-08-16 17:46:21 UTC 
Yesterday, I downloaded and applied from the Dell web site the 2.2.16-4 kernel they posted for the PE 2450 with security fixes, etc.  I also upgraded to 
the nfs-utils-0.1.9.1-1.  I'm hoping this will stabilize the system.   Will see how this goes.