Bug 149150 - kernel hugemem crash in load_elf_binary
kernel hugemem crash in load_elf_binary
Product: Red Hat Enterprise Linux 3
Classification: Red Hat
Component: kernel (Show other bugs)
i386 Linux
medium Severity medium
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Assigned To: Dave Anderson
Brian Brock
Depends On:
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Reported: 2005-02-19 09:27 EST by satish
Modified: 2007-11-30 17:07 EST (History)
2 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2005-03-14 11:29:59 EST
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description satish 2005-02-19 09:27:44 EST
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; rv:1.7.3) Gecko/20041001 Firefox/0.10.1

Description of problem:
I am trying to run compialtion in to my filesystem space on 2.4.21-20.ELhugemem and see this crash once in a while. We had to do changes in to the filesystem for the hugemem support. 

Unable to handle kernel NULL pointer dereference at virtual address 00000014
 printing eip:
*pde = 00003001
*pte = 00000000
Oops: 0002
panfs loop nfsd lp parport nfs lockd sunrpc audit e100 floppy sg keybdev mousedev hid input usb-ohci usbcore ext3 jbd aic7xxx diskdumplib sd_mod scsi_mod
CPU:    0
EIP:    0060:[<021655c2>]    Tainted: P
EFLAGS: 00010246

EIP is at fput [kernel] 0x2 (2.4.21-20.ELhugemem/i686)
eax: 00000000   ebx: 00000007   ecx: 00280007   edx: 00000000
esi: ffffffff   edi: 00000000   ebp: 281e3e54   esp: 281e3ca4
ds: 0068   es: 0068   ss: 0068
Process mkdep (pid: 19310, stackpage=281e3000)
Stack: 0218f4ba 281e3e54 00000001 09ad6b80 000000e0 00000044 281e3cdc 42ab5cc9
       40476780 281e3d40 00000044 239dad80 10f30414 00073d70 00000000 00400000
       00000000 00000001 00000000 00000000 00000000 00000000 ffffffff 080487e0
Call Trace:   [<0218f4ba>] load_elf_binary [kernel] 0x8ba (0x281e3ca4)
[<0214013a>] follow_page [kernel] 0x23a (0x281e3d48)
[<02161aac>] rw_vm [kernel] 0x6c (0x281e3d8c)
[<0218ec00>] load_elf_binary [kernel] 0x0 (0x281e3df0)
[<0216ffd4>] search_binary_handler [kernel] 0x124 (0x281e3dfc)
[<021701f2>] do_execve [kernel] 0x182 (0x281e3e44)
[<0210a110>] sys_execve [kernel] 0x50 (0x281e3fa4)

Code: Bad EIP value.

Kernel panic: Fatal exception

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1.Trying to run compilation in a filesystem space

Actual Results:  crash

Expected Results:  work fine

Additional info:
Comment 1 Ernie Petrides 2005-02-28 22:06:00 EST
Hello, Satish.  Could you please reproduce this on an untainted
2.4.21-27.0.2.EL-based kernel?  There were some security errata
fixes for load_elf_binary() in RHSA-2005:043.  Thanks.
Comment 2 satish 2005-03-14 11:29:59 EST
Thanks for y'r help, it turns out that the issue for me was "how to
determine if a address passed in was kernel or user?" which i could
get around by using set_fs/get_fs. So i mark this as worksforme

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