sreadahead crashed with SIGSEGV in __pause_nocancel()

[Jamie Strandboge]

Binary package hint: sreadahead

On boot with up-to-date Karmic as of a few minutes ago, sreadahead dies on boot with the following in dmesg:
Oct 1 09:56:14 severus kernel: [ 59.282811] sreadahead[651]: segfault at 7fc2ab6b6010 ip 0000000000401f3b sp 00007fff47586570 error 4 in sreadahead[400000+3000]

gdm is not started. I had to run 'sudo start gdm' to get it to start (curiously, /etc/init.d/gdm start did *not* work). I am not sure if gdm not starting and sreadahead are related. I also did not see the splash screens on this boot. The following are what were updated before a reboot:
$ find . -mtime -3 -type f | sort
./apparmor_2.3.1+1403-0ubuntu23_amd64.deb
./apparmor-docs_2.3.1+1403-0ubuntu23_all.deb
./apparmor-utils_2.3.1+1403-0ubuntu23_amd64.deb
./gdm_2.28.0-0ubuntu8_amd64.deb
./ia32-libs_2.7ubuntu15_amd64.deb
./indicator-session_0.1.5-0ubuntu2_amd64.deb
./language-pack-en_1%3a9.10+20090926.1_all.deb
./language-pack-en-base_1%3a9.10+20090926_all.deb
./language-pack-gnome-en_1%3a9.10+20090926.1_all.deb
./language-pack-gnome-en-base_1%3a9.10+20090926_all.deb
./libapache2-mod-apparmor_2.3.1+1403-0ubuntu23_amd64.deb
./libapparmor1_2.3.1+1403-0ubuntu23_amd64.deb
./libapparmor-perl_2.3.1+1403-0ubuntu23_amd64.deb
./libelfg0_0.8.12-0ubuntu1_amd64.deb
./libnautilus-extension1_1%3a2.28.0-0ubuntu3_amd64.deb
./libnm-glib2_0.8~a~git.20090923t064445.b20cef2-0ubuntu2_amd64.deb
./libnm-util1_0.8~a~git.20090923t064445.b20cef2-0ubuntu2_amd64.deb
./libusplash0_0.5.39_amd64.deb
./mplayer_2%3a1.0~rc3+svn20090426-1ubuntu7_amd64.deb
./mplayer-nogui_2%3a1.0~rc3+svn20090426-1ubuntu7_amd64.deb
./nautilus_1%3a2.28.0-0ubuntu3_amd64.deb
./nautilus-data_1%3a2.28.0-0ubuntu3_all.deb
./network-manager_0.8~a~git.20090923t064445.b20cef2-0ubuntu2_amd64.deb
./software-center_0.4.3_all.deb
./tasksel_2.73ubuntu22_all.deb
./tasksel-data_2.73ubuntu22_all.deb
./ubuntu-xsplash-artwork_0.8.1-0ubuntu2_amd64.deb
./usplash_0.5.39_amd64.deb
./xsplash_0.8.1-0ubuntu2_amd64.deb

ProblemType: Crash
Architecture: amd64
CrashCounter: 1
Date: Thu Oct 1 09:41:30 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /sbin/sreadahead
Package: sreadahead 1.0-4
ProcCmdline: /sbin/sreadahead -t 0
ProcEnviron: PATH=(custom, no user)
ProcVersionSignature: Ubuntu 2.6.31-11.36-generic
SegvAnalysis:
 Segfault happened at: 0x401f3b: mov (%r15,%rdi,1),%dil
 PC (0x00401f3b) ok
 source "(%r15,%rdi,1)" (0x7fb39b883010) not located in a known VMA region (needed readable region)!
 destination "%dil" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: sreadahead
StacktraceTop:
 __pause_nocancel () from /lib/libpthread.so.0
 ?? ()
 __libc_start_main () from /lib/libc.so.6
 ?? ()
 ?? ()
Title: sreadahead crashed with SIGSEGV in __pause_nocancel()
Uname: Linux 2.6.31-11-generic x86_64
UserGroups:

[Jamie Strandboge (jdstrand)]

The following bugs are likely duplicates, but apport has not unprivated them yet:
bug 422304
bug 427314
bug 429187
bug 430020

I'd be happy to subscribe a developer to the bugs.

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #414597, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.