[Bug runtime/9927] 2.6.29-rc7 - kernel crash with sharedbuf.exp stap test script

["mhiramat at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

------- Additional Comments From mhiramat at redhat dot com  2009-03-12 15:28 -------
This was reproduced on 2.6.29-rc7/i386, but not reproduced on 2.6.29-rc6/i386.
So, that seems kernel bug between them.
Maybe, need to do git-bisect?


BUG: unable to handle kernel paging request at f9ac9218
IP: [<c045b3cb>] load_module+0x14d9/0x164a
Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
last sysfs file: /sys/module/xt_state/sections/.text
Modules linked in: stap_869395e8a8c1abc66e314b36f05020cd_202 sco bridge stp bnep
l2cap bluetooth sunrpc ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4
iptable_filter ip_tables ip6t_REJECT nf_conntrack_ipv6 xt_state nf_conntrack
ip6table_filter ip6_tables ipv6 cpufreq_ondemand powernow_k8 dm_mirror
dm_region_hash dm_log dm_multipath uinput snd_hda_codec_idt snd_hda_intel
snd_hda_codec snd_hwdep snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq
snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore
rtc_cmos pcspkr dcdbas snd_page_alloc k8temp rtc_core tg3 hwmon i2c_nforce2
rtc_lib i2c_core libphy ata_generic pata_acpi sata_nv [last unloaded:
stap_987bd8a88d00f68d84ccb5d3c698cdcb_414]

Pid: 9875, comm: staprun Not tainted (2.6.29-rc7 #1) OptiPlex 740
EIP: 0060:[<c045b3cb>] EFLAGS: 00210246 CPU: 0
EIP is at load_module+0x14d9/0x164a
EAX: 00200286 EBX: f9ac90e0 ECX: 00000003 EDX: 00000001
ESI: f9ac90e0 EDI: fffffffe EBP: f28c7fa0 ESP: f28c7ea4
 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
Process staprun (pid: 9875, ti=f28c7000 task=f3523e40 task.ti=f28c7000)
Stack:
 0000002a f3523e40 f28c7f14 00200046 00023b59 00000162 f28c7f5c b95bb088
 f9ab703c f9ab735c c08689c4 f3523e40 f3524314 f9a93000 f9ab6cf4 f9ab6b59
 f2874aa0 f9ac195c 00000029 00000010 00000000 f9ac90e0 00000000 f28c7f1c
Call Trace:
 [<c0452602>] ? mark_lock+0x1e/0x349
 [<c06f3dff>] ? __mutex_lock_common+0x2d4/0x329
 [<c06f3e82>] ? mutex_lock_interruptible_nested+0x2e/0x35
 [<c045b658>] ? sys_init_module+0x41/0x18c
 [<c040846b>] ? sysenter_do_call+0x12/0x3f
Code: 58 ff ff ff 8b 93 d4 00 00 00 89 d8 e8 84 0e fc ff 83 bd 5c ff ff ff 00 74
0b 8b 85 5c ff ff ff e8 ac e4 ff ff 8b b5 58 ff ff ff <8b> 86 38 01 00 00 e8 9b
e4 ff ff 8b 85 44 ff ff ff e8 25 5f 04 
EIP: [<c045b3cb>] load_module+0x14d9/0x164a SS:ESP 0068:f28c7ea4
---[ end trace 2a7ec952fee814db ]---
Kernel panic - not syncing: Fatal exception

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http://sourceware.org/bugzilla/show_bug.cgi?id=9927

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