Bug 158176

Description of problem:

When executing e.g. "strace -e trace=file -f sudo /bin/su - root -c ls", the
kernel oopses, locking the machine up (SysRq ok, externak ping ok, external ssh
not ok).


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

(stock FC4test3)
kernel-2.6.11-1.1286_FC4
strace-4.5.11-1
sudo-1.6.8p8-1

How reproducible:

Always


Steps to Reproduce:

$ strace -e trace=file -f sudo /bin/su - root -c ls
(oops can also be invoked in single-user boot)

  
Actual results:

May 19 13:48:14 dmbr042 kernel: Unable to handle kernel NULL pointer dereference
at virtual address 00000000
May 19 13:48:14 dmbr042 kernel:  printing eip:
May 19 13:48:14 dmbr042 kernel: 00000000
May 19 13:48:14 dmbr042 kernel: *pde = 3bc37067
May 19 13:48:14 dmbr042 kernel: Oops: 0000 [#1]
May 19 13:48:14 dmbr042 kernel: Modules linked in: hci_usb bluetooth dm_mod
video button battery ac ohci1394 ieee1394 yenta_socket rsrc_nonstatic
pcmcia_core uhci_hcd ehci_hcd snd_intel8x0m i2c_i801 i2c_core snd_intel8x0
snd_ac97_codec snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq
snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore
snd_page_alloc ipw2200 ieee80211 ieee80211_crypt b44 mii ext3 jbd ata_piix
libata sd_mod scsi_mod
May 19 13:48:14 dmbr042 kernel: CPU:    0
May 19 13:48:14 dmbr042 kernel: EIP:    0060:[<00000000>]    Not tainted VLI
May 19 13:48:14 dmbr042 kernel: EFLAGS: 00010286   (2.6.11-1.1286_FC4)
May 19 13:48:14 dmbr042 kernel: EIP is at _stext+0x3feffdd8/0x8
May 19 13:48:14 dmbr042 kernel: eax: f7d17000   ebx: 01200011   ecx: 00000000  
edx: 00000000
May 19 13:48:14 dmbr042 kernel: esi: c1b18000   edi: c1b18bc4   ebp: f7d17000  
esp: f7d17fc4
May 19 13:48:14 dmbr042 kernel: ds: 007b   es: 007b   ss: 0068
May 19 13:48:14 dmbr042 kernel: Process su (pid: 2158, threadinfo=f7d17000
task=c1b18000)
May 19 13:48:14 dmbr042 kernel: Stack: 01202011 00000000 00000000 00000000
b7ef6708 bfc199d8 00000000 0000007b
May 19 13:48:14 dmbr042 kernel:        c010007b 00000078 005a1402 00000073
00000282 bfc19980 0000007b
May 19 13:48:14 dmbr042 kernel: Call Trace:
May 19 13:48:14 dmbr042 kernel: Code:  Bad EIP value.
May 19 13:48:14 dmbr042 kernel:  <0>Fatal exception: panic in 5 seconds