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
Created attachment 114562 [details] dmesg
Can you try and reproduce on the latest kernel ? 1286 is ancient in the fast-moving world of kernel :-)
Fixed in 1340 (appearantly, patience is not always a virtue ;) ).