[Bug runtime/10653] New: intermittent itrace crashes

[Bug runtime/10653] New: intermittent itrace crashes

[fche at redhat dot com]

Linux version 2.6.31-12.fc12.i686 (mockbuild@x86-4.fedora.phx.redhat.com) (gcc
version 4.4.1 20090911 (Red Hat 4.4.1-13) (GCC) ) #1 SMP Mon Sep 14 02:27:06 EDT
2009

itrace.exp occasionally triggers this beauty:

stap_966b4a66c1cd6e6c80c3b6b206f6649b_1372: systemtap: 0.9.9/0.142, base:
f7d38000, memory: 24576+24576+1344+13600 data+text+ctx+net, probes: 5
------------[ cut here ]------------
kernel BUG at kernel/exit.c:1048!
invalid opcode: 0000 [#1] SMP 
last sysfs file: /sys/module/virtio_pci/sections/__mcount_loc
Modules linked in: stap_966b4a66c1cd6e6c80c3b6b206f6649b_1372 uprobes netconsole
iptable_nat nf_nat nfsd exportfs configfs nfs lockd fscache nfs_acl auth_rpcgss
sunrpc ipv6 dm_multipath uinput ppdev 8139too parport_pc i2c_piix4 i2c_core
parport 8139cp virtio_balloon mii floppy virtio_pci [last unloaded:
stap_5c4d9350d00a175dc03e834cff7f9622_1041]

Pid: 7248, comm: ls_1401 Tainted: G        W  (2.6.31-12.fc12.i686 #1) 
EIP: 0060:[<c04489eb>] EFLAGS: 00210282 CPU: 3
EIP is at do_group_exit+0x2d/0x99
EAX: f2208000 EBX: f634b700 ECX: c046fe51 EDX: 4483a0fe
ESI: 4483a0fe EDI: f23adfb4 EBP: f23adea0 ESP: f23ade90
 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Process ls_1401 (pid: 7248, ti=f23ac000 task=f2208000 task.ti=f23ac000)
Stack:
 d33a9351 4483a0fe f23adf08 f23adfb4 f23adecc c04547d3 00200246 f6346e00
<0> f23adf88 f634b700 f6347304 d33a9351 f23adfb4 00000000 00000000 f23adfac
<0> c0402c3f 00000000 d33a9351 f23adefc 00200246 d33a9351 f2208000 00000006
Call Trace:
 [<c04547d3>] ? get_signal_to_deliver+0x333/0x35b
 [<c0402c3f>] ? do_notify_resume+0x87/0x7a7
 [<c046f084>] ? trace_hardirqs_off_caller+0x26/0xb7
 [<c046f12e>] ? trace_hardirqs_off+0x19/0x2c
 [<c0403b58>] ? work_notifysig+0x13/0x1b
Code: e5 57 56 53 83 ec 04 0f 1f 44 00 00 89 c6 65 a1 14 00 00 00 89 45 f0 31 c0
89 f2 64 a1 00 d0 ae c0 84 d2 8b 98 ec 03 00 00 79 04 <0f> 0b eb fe f6 43 58 08
75 06 83 7b 50 00 74 35 8b 73 48 eb 29 
EIP: [<c04489eb>] do_group_exit+0x2d/0x99 SS:ESP 0068:f23ade90

-- 
           Summary: intermittent itrace crashes
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: runtime
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: fche at redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=10653

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[Bug runtime/10653] intermittent itrace crashes

[fche at redhat dot com]

------- Additional Comments From fche at redhat dot com  2009-09-17 14:46 -------
Created an attachment (id=4200)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=4200&action=view)
generated c code for likely failing itrace test case


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[Bug runtime/10653] intermittent itrace crashes

[dsmith at redhat dot com]

------- Additional Comments From dsmith at redhat dot com  2009-09-28 18:10 -------
(In reply to comment #1)
> Created an attachment (id=4200)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=4200&action=view)
> generated c code for likely failing itrace test case

Is this C code the original output from a test script or has the C code been
modified by hand?


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[Bug runtime/10653] intermittent itrace crashes

[fche at redhat dot com]

------- Additional Comments From fche at redhat dot com  2009-11-02 18:09 -------
*** Bug 10216 has been marked as a duplicate of this bug. ***

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http://sourceware.org/bugzilla/show_bug.cgi?id=10653

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[Bug runtime/10653] intermittent itrace crashes

[fche at redhat dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
OtherBugsDependingO|                            |10907
              nThis|                            |


http://sourceware.org/bugzilla/show_bug.cgi?id=10653

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[Bug runtime/10653] intermittent itrace crashes

[fche at redhat dot com]

------- Additional Comments From fche at redhat dot com  2009-11-06 14:25 -------
I've been working on diagnosing this problem.
Some progress appears likely by revising the utrace callbacks
and synchronization logic.


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|systemtap at sources dot    |fche at redhat dot com
                   |redhat dot com              |
             Status|NEW                         |ASSIGNED


http://sourceware.org/bugzilla/show_bug.cgi?id=10653

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