sreadahead crashed with SIGSEGV in __pause_nocancel()

[Simon Déziel]

Binary package hint: sreadahead

I boot my laptop and logged in. After a few seconds in my gnome session, I got apport telling me that sreadahead had crash.

I don't know if it's releated but my hard drive is reported to be in pre-fail state by gnome-disk-utility. Anyway, segfaults are never good, even when the hard drive is dying.

ProblemType: Crash
Architecture: amd64
Date: Tue Sep 22 15:42:26 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /sbin/sreadahead
Package: sreadahead 1.0-3
ProcCmdline: /sbin/sreadahead -t 0
ProcEnviron: PATH=(custom, no user)
ProcVersionSignature: Ubuntu 2.6.31-10.34-generic
SegvAnalysis:
 Segfault happened at: 0x401ed5: mov (%r15,%rdi,1),%dil
 PC (0x00401ed5) ok
 source "(%r15,%rdi,1)" (0x7f6d501ed010) 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 2.6.31-10-generic x86_64
UserGroups:

[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.

[Moreno Bartalucci (moreno-bartalucci)]

I'm having a very similar problem on kubuntu amd64 karmic.
I tried to jump to the original bug report (#414597) but it says "I'm not allowed to see that page": is it normal?

In my case I disabled the crash reports so I don't get any but once the pc is booted up I can see in dmesg this:

Sep 24 08:12:25 nbmoreno kernel: [ 92.029820] sreadahead[442]: segfault at 7f286c6a8010 ip 0000000000401ed5 sp 00007fffdd00d0f0 error 4 in sreadahead[400000+3000]

Furthermore, the file /var/lib/sreadahead/pack is *NEVER* created.

I don't know if it's helpful, though I tried to run sreadhead as root with strace *after* the boot, so:

root@nbmoreno:~# strace sreadahead --no-fork 2> strace.txt

gave the result as attached: segmentation fault

Any help is greatly appreciated!

[Simon Déziel (sdeziel)]

I have the same problem accessing the bug #414597. Maybe some else can help us on that.

I haven't traced sreadahead but I can confirm that I have not the file /var/lib/sreadahead/pack.