Comment 16 for bug 606892

I am affected by this bug on a daily basis with the most recent Ubuntu kernel.
Running sudo seem to trigger the problem.

2.6.32-26-server #48-Ubuntu SMP:

[ 294.112155] ------------[ cut here ]------------
[ 294.112159] kernel BUG at /build/buildd/linux-2.6.32/kernel/cred.c:168!
[ 294.112161] invalid opcode: 0000 [#1] SMP
[ 294.112163] last sysfs file: /sys/devices/pci0000:00/0000:00:1c.1/0000:03:00.0/net/wlan0/operstate
[ 294.112165] CPU 0
[ 294.112166] Modules linked in: binfmt_misc ppdev parport_pc ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables bridge stp kvm_intel kvm nls_utf8 cifs nfsd exportfs nfs lockd nfs_acl auth_rpcgss fbcon tileblit font bitblit softcursor vga16fb vgastate snd_hda_codec_conexant thinkpad_acpi sunrpc arc4 snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy pcmcia snd_seq_oss snd_seq_midi iwlagn snd_rawmidi radeon iwlcore ttm snd_seq_midi_event drm_kms_helper snd_seq mac80211 snd_timer snd_seq_device uvcvideo yenta_socket ricoh_mmc videodev v4l1_compat v4l2_compat_ioctl32 rsrc_nonstatic pcmcia_core snd psmouse serio_raw cfg80211 sdhci_pci sdhci led_class nvram tpm_tis tpm tpm_bios drm i2c_algo_bit video output soundcore snd_page_alloc intel_agp lp parport ohci1394 dm_raid45 usb_storage xor ieee1394 e1000e ahci
[ 294.112216] Pid: 15091, comm: sudo Not tainted 2.6.32-26-server #48-Ubuntu 40613VG
[ 294.112218] RIP: 0010:[<ffffffff8108a64e>] [<ffffffff8108a64e>] __put_cred+0x3e/0x50
[ 294.112225] RSP: 0018:ffff8800bdaa9f18 EFLAGS: 00010202
[ 294.112226] RAX: 0000000000000001 RBX: ffff880102bedb40 RCX: 00000000ffffffff
[ 294.112228] RDX: 00000000ffffffff RSI: ffff880102bedb40 RDI: ffff880102bedb40
[ 294.112229] RBP: ffff8800bdaa9f18 R08: 0000000000000000 R09: 0000000000000000
[ 294.112231] R10: 0000000000000000 R11: 0000000000000246 R12: ffff880102bed0c0
[ 294.112233] R13: ffff8801183a96e0 R14: 0000000000000000 R15: 0000000000000001
[ 294.112235] FS: 00002b34d4f18c00(0000) GS:ffff880005600000(0000) knlGS:0000000000000000
[ 294.112236] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 294.112238] CR2: 00002b34d49a5355 CR3: 00000000ba0cc000 CR4: 00000000000426f0
[ 294.112240] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 294.112241] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 294.112243] Process sudo (pid: 15091, threadinfo ffff8800bdaa8000, task ffff8801183a96e0)
[ 294.112244] Stack:
[ 294.112245] ffff8800bdaa9f48 ffffffff8108acc1 ffff8800bdaa9f38 ffff880102bed0c0
[ 294.112248] <0> 0000000000000000 ffff880102bedb40 ffff8800bdaa9f78 ffffffff8107cd3a
[ 294.112251] <0> 0000000000000000 000000000041e992 00000000016bfd00 0000000000000001
[ 294.112254] Call Trace:
[ 294.112257] [<ffffffff8108acc1>] commit_creds+0x121/0x1e0
[ 294.112260] [<ffffffff8107cd3a>] sys_setuid+0xda/0x100
[ 294.112264] [<ffffffff810121b2>] system_call_fastpath+0x16/0x1b
[ 294.112265] Code: 8b 04 25 c0 cb 00 00 48 3b b8 48 04 00 00 74 23 48 3b b8 40 04 00 00 74 16 48 83 ef 80 48 c7 c6 b0 a6 08 81 e8 74 e9 03 00 c9 c3 <0f> 0b eb fe 0f 0b eb fe 0f 0b eb fe 66 0f 1f 44 00 00 55 48 89
[ 294.112289] RIP [<ffffffff8108a64e>] __put_cred+0x3e/0x50
[ 294.112291] RSP <ffff8800bdaa9f18>
[ 294.112293] ---[ end trace 61361b08612c1887 ]---