Public bug reported:

Binary package hint: linux-source-2.6.20

Some processes are killed with segmentation fault. I am not doing same
things when it happans. After crashes I reboot system, if system can
read from keyboard (and output to screen is "normal")...

I suppose kernel corrupts memory or registers used by processes...

Kernel version with this bug: 2.6.20-16 and 2.6.20-15.
2.6.17 works.

This is what I found in /var/log/messages (if can reboot regularly) :

May 26 19:31:42 localhost kernel: [12252.894732] dbus-daemon[5706]: segfault at 
0000000000000019 rip 00002b03a0b64c1e rsp 00007fff0a840070 error 4
May 26 19:31:42 localhost kernel: [12252.978308] start_kdeinit[5743]: segfault 
at 0000000100000029 rip 00002b5d1376afea rsp 00007fff9734bcd0 error 4
May 26 19:31:43 localhost kernel: [12253.261812] dbus-launch[5705]: segfault at 
0000558d5302cdc8 rip 0000558d5302cdc8 rsp 00007fff1c23cd28 error 14
May 26 19:31:44 localhost kernel: [12253.815671] kdm[18488] general protection 
rip:2b11806450fb rsp:7fff2a46ea60 error:0
May 26 19:31:44 localhost kernel: [12253.816661] kdm[5267] general protection 
rip:2b11806450fb rsp:7fff2a46eaa0 error:0
May 26 19:31:52 localhost kernel: [12257.332923] dcopserver[5747]: segfault at 
0000000000000018 rip 00002b7329df6468 rsp 00007fff82aee160 error 4


May 29 20:32:22 localhost kernel: [ 6154.174383] udevd[2620]: segfault at 
0000000000000001 rip 0000000000000001 rsp 00007fff9ec21200 error 14
May 29 20:32:25 localhost kernel: [ 6158.405755] kdeinit[5585]: segfault at 
00002acd2897cf80 rip 00002b760391dc3d rsp 00007fffa97f3d70 error 4
May 29 20:32:26 localhost kernel: [ 6160.106953] dcopserver[5588]: segfault at 
00000000401a2178 rip 00002b7601f32430 rsp 00007fffa97f3230 error 4
May 29 20:32:29 localhost kernel: [ 6162.596525] dbus-daemon[5549]: segfault at 
00002acab95309c0 rip 00002b06efa1d640 rsp 00007fffbb993198 error 4
May 29 20:32:30 localhost kernel: [ 6163.303249] kdesud[5920]: segfault at 
0000000000000000 rip 0000000000000000 rsp 00007fff80051a58 error 14
May 29 20:32:31 localhost kernel: [ 6163.797745] dbus-daemon[4932]: segfault at 
00002b60ed8a1d3f rip 00002b056da87439 rsp 00007fff3d924dd0 error 4
May 29 20:32:31 localhost kernel: [ 6163.880049] dhcdbd[4988]: segfault at 
0000000000000000 rip 0000000000000000 rsp 00007fff6b615f88 error 14
May 29 20:32:32 localhost kernel: [ 6164.101275] dbus-launch[5548]: segfault at 
00005638a15763c0 rip 00005638a15763c0 rsp 00007fffbaf923b8 error 14
May 29 20:32:32 localhost kernel: [ 6164.389444] avahi-daemon[5020]: segfault 
at 0000000000000000 rip 0000000000000000 rsp 00007fff688d2458 error 14
May 29 20:32:34 localhost kernel: [ 6165.114522] kdm[9625]: segfault at 
000000000000006f rip 000000000000006f rsp 00007fff1d5368a8 error 14
May 29 20:32:35 localhost kernel: [ 6165.170335] kdm[5104]: segfault at 
000000000000006f rip 000000000000006f rsp 00007fff1d5368e8 error 14
May 29 20:32:35 localhost kernel: [ 6165.425950] NetworkManagerD[5035]: 
segfault at 0000000002086d50 rip 00002ad919b52640 rsp 00007fff9214c778 error 4
May 29 20:32:43 localhost kernel: [ 6170.878814] aspell[5643] general 
protection rip:2af1039a78b8 rsp:7fffa7fe0fc8 error:0


Jun  1 22:48:15 localhost kernel: [ 8436.955832] kweatherservice[5701] trap 
stack segment rip:2acd5ecf5cf9 rsp:7fff4cd8ce90 error:0
Jun  1 22:48:15 localhost kernel: [ 8437.468424] korgac[5769] trap stack 
segment rip:2b33ac94bcf9 rsp:7fffff321870 error:0
Jun  1 22:48:15 localhost kernel: [ 8437.894055] aspell[5736]: segfault at 
0000000100001024 rip 0000000100001024 rsp 00007fff283d93d0 error 14
Jun  1 22:48:58 localhost kernel: [ 8462.526191] dbus-daemon[5641] general 
protection rip:2ad3bafdf620 rsp:7ffff03cebc8 error:0
Jun  1 22:48:59 localhost kernel: [ 8463.117832] udevd[10436]: segfault at 
0000000000000000 rip 0000000000000000 rsp 00007fff547b37b8 error 14
Jun  1 22:48:59 localhost kernel: [ 8463.202454] udevd[10437]: segfault at 
0000000000000000 rip 0000000000000000 rsp 00007fff547b37b8 error 14
Jun  1 22:48:59 localhost kernel: [ 8463.285000] start_kdeinit[5676] general 
protection rip:2b630f78ffea rsp:7fff9b326cb0 error:0
Jun  1 22:48:59 localhost kernel: [ 8463.325704] dbus-launch[5640] general 
protection rip:2b7e3f3d8118 rsp:7fff6b6de5d0 error:0
Jun  1 22:49:01 localhost kernel: [ 8463.678780] kdm[10469]: segfault at 
0000000000000000 rip 0000000000000000 rsp 00007fffcdef2e98 error 14
Jun  1 22:49:01 localhost kernel: [ 8463.679716] kdm[5201]: segfault at 
0000000000000000 rip 0000000000000000 rsp 00007fffcdef2ed8 error 14
Jun  1 22:49:09 localhost kernel: [ 8467.786519] dcopserver[5680]: segfault at 
0000007200000190 rip 00002b5008545468 rsp 00007fffa439de40 error 4
Jun  1 22:49:58 localhost kernel: [ 8489.069739] udevd[10490]: segfault at 
0000000000000000 rip 0000000000000000 rsp 00007fff547b37b8 error 14
Jun  1 22:49:58 localhost kernel: [ 8489.151704] udevd[10493]: segfault at 
0000000000000000 rip 0000000000000000 rsp 00007fff547b37b8 error 14
Jun  1 22:49:58 localhost kernel: [ 8489.232549] udevd[10496]: segfault at 
0000000000000000 rip 0000000000000000 rsp 00007fff547b37b8 error 14
Jun  1 22:49:58 localhost kernel: [ 8489.314062] udevd[10499]: segfault at 
0000000000000000 rip 0000000000000000 rsp 00007fff547b37b8 error 14
Jun  1 22:49:58 localhost kernel: [ 8489.396400] udevd[10502]: segfault at 
0000000000000000 rip 0000000000000000 rsp 00007fff547b37b8 error 14
Jun  1 22:49:58 localhost kernel: [ 8489.477628] udevd[10505]: segfault at 
0000000000000000 rip 0000000000000000 rsp 00007fff547b37b8 error 14
Jun  1 22:49:58 localhost kernel: [ 8489.559129] udevd[10508]: segfault at 
0000000000000000 rip 0000000000000000 rsp 00007fff547b37b8 error 14
Jun  1 22:49:58 localhost kernel: [ 8489.640097] udevd[10511]: segfault at 
0000000000000000 rip 0000000000000000 rsp 00007fff547b37b8 error 14
Jun  1 22:49:58 localhost kernel: [ 8489.725117] udevd[10514]: segfault at 
0000000000000000 rip 0000000000000000 rsp 00007fff547b37b8 error 14
Jun  1 22:49:58 localhost kernel: [ 8489.822533] udevd[10517]: segfault at 
0000000000000000 rip 0000000000000000 rsp 00007fff547b37b8 error 14

** Affects: linux-source-2.6.20 (Ubuntu)
     Importance: Undecided
         Status: Unconfirmed

-- 
segmentation fault of "random" process
https://bugs.launchpad.net/bugs/118351
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