Hi there, We've seen a report of a problem with dccp_probe as shown below. The user has also verified that it occurs in tcp_probe as well. This is on Dave Miller's tree but that currently tracks Linus' tree quite closely. I do note that it is around 2.6.22-rc2 timeframe so there is a possibility fixes may have gone in since. Ian ---------- Forwarded message ---------- From: Patrick Andrieux <[email protected]> Date: Jun 6, 2007 1:07 AM Subject: segfault : modprobe dccp_probe To: Ian McDonald <[email protected]>, Arnaldo Carvalho de Melo <[email protected]> Cc: [email protected] Hi, I have a segfault when inserting dccp_probe module on Dave Miller's tree *without* Ian's patches. I got it using this cmd line : #git-clone git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6.git davem Please find my .config in attachement. I'm working on Debian testing (lenny). config : ---------------- ---------------- ----------------- | dccpClient |----------| netembox |----------| dccpServer | ---------------- ---------------- ----------------- dccpServer # uname -a Linux dccpServer 2.6.22-rc2final-dccp #1 PREEMPT Tue May 29 18:16:08 IST 2007 i686 GNU/Linux dccpClient # uname -a Linux dccpClient 2.6.22-rc2final-dccp #1 PREEMPT Tue May 29 18:16:08 IST 2007 i686 GNU/Linux script I use when testing with CCID3: #! /bin/sh #modprobe dccp modprobe dccp_ccid3 sysctl -w net.dccp.default.seq_window=10000 sysctl -w net.dccp.default.send_ackvec=0 sysctl -w net.dccp.default.rx_ccid=3 sysctl -w net.dccp.default.tx_ccid=3 sysctl -w net.dccp.default.tx_qlen=5 dccpServer # modprobe dccp_probe Segmentation fault dccpServer # ls -l /proc/net/dccpprobe -r-------- 1 root root 0 2007-06-05 12:31 /proc/net/dccpprobe /etc/log/syslog : Jun 5 12:19:55 dccpServer kernel: [ 609.085205] CCID: Registered CCID 3 (ccid3) Jun 5 12:26:55 dccpServer kernel: [ 1027.751606] BUG: unable to handle kernel paging request at virtual address c0316c18 Jun 5 12:26:55 dccpServer kernel: [ 1027.751614] printing eip: Jun 5 12:26:55 dccpServer kernel: [ 1027.751616] c0320687 Jun 5 12:26:55 dccpServer kernel: [ 1027.751618] *pde = 1fe5d163 Jun 5 12:26:55 dccpServer kernel: [ 1027.751620] *pte = 00316161 Jun 5 12:26:55 dccpServer kernel: [ 1027.751624] Oops: 0003 [#1] Jun 5 12:26:55 dccpServer kernel: [ 1027.751625] PREEMPT Jun 5 12:26:55 dccpServer kernel: [ 1027.751628] Modules linked in: dccp_probe dccp_ccid3 dccp_tfrc_lib ppdev lp af_packet snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss mousedev snd_pcm snd_ timer evdev parport_pc parport snd soundcore psmouse pcspkr rtc usbhid snd_page_alloc intel_agp agpgart floppy ehci_hcd tg3 uhci_hcd usbcore thermal processor fan unix Jun 5 12:26:55 dccpServer kernel: [ 1027.751657 ] CPU: 0 Jun 5 12:26:55 dccpServer kernel: [ 1027.751658] EIP: 0060:[<c0320687>] Not tainted VLI Jun 5 12:26:55 dccpServer kernel: [ 1027.751659] EFLAGS: 00210246 (2.6.22-rc2final-dccp #1) Jun 5 12:26:55 dccpServer kernel: [ 1027.751666] EIP is at arch_arm_kprobe+0x6/0xb Jun 5 12:26:55 dccpServer kernel: [ 1027.751669] eax: c0316c18 ebx: 00000000 ecx: e5f74000 edx: 00000000 Jun 5 12:26:55 dccpServer kernel: [ 1027.751672] esi: f8a25740 edi: 00000000 ebp: e5f74ea0 esp: e5f74ea0 Jun 5 12:26:55 dccpServer kernel: [ 1027.751675] ds: 007b es: 007b fs: 0000 gs: 0033 ss: 0068 Jun 5 12:26:55 dccpServer kernel: [ 1027.751679] Process modprobe (pid: 4889, ti=e5f74000 task=e5ae6a80 task.ti=e5f74000 ) Jun 5 12:26:55 dccpServer kernel: [ 1027.751681] Stack: e5f74eb4 c0321921 fffffff4 efa1c498 efa1c6b4 e5f74ebc c0321994 e5f74ed0 Jun 5 12:26:55 dccpServer kernel: [ 1027.751690] f8a27076 c01220c0 ffffffff efa1c684 e5f74fb0 c0137d1f 00000002 00000000 Jun 5 12:26:55 dccpServer kernel: [ 1027.751698] 00200246 00000000 0001b486 ee5379b8 f8a2580c 00000650 00200246 e65a9de4 Jun 5 12:26:55 dccpServer kernel: [ 1027.751707] Call Trace: Jun 5 12:26:55 dccpServer kernel: [ 1027.751709] [<c0104d52>] show_trace_log_lvl+0x1a/0x2f Jun 5 12:26:55 dccpServer kernel: [ 1027.751714] [<c0104e04>] show_stack_log_lvl+0x9d/0xa5 Jun 5 12:26:55 dccpServer kernel: [ 1027.751718] [<c0105006>] show_registers+0x1fa/0x33b Jun 5 12:26:55 dccpServer kernel: [ 1027.751722] [<c0105245>] die+0xfe/0x200 Jun 5 12:26:55 dccpServer kernel: [ 1027.751726] [<c03213ab>] do_page_fault+0x436/0x509 Jun 5 12:26:55 dccpServer kernel: [ 1027.751730] [<c031fd4a>] error_code+0x6a/0x70 Jun 5 12:26:55 dccpServer kernel: [ 1027.751733] [<c0321921>] __register_kprobe+0x23a/0x294 Jun 5 12:26:55 dccpServer kernel: [ 1027.751737] [<c0321994>] register_jprobe+0x19/0x1b Jun 5 12:26:55 dccpServer kernel: [ 1027.751741] [<f8a27076>] dccpprobe_init+0x76/0xb4 [dccp_probe] Jun 5 12:26:55 dccpServer kernel: [ 1027.751747] [<c0137d1f>] sys_init_module+0x12d5/0x1415 Jun 5 12:26:55 dccpServer kernel: [ 1027.751753] [<c0103db2>] sysenter_past_esp+0x5f/0x99 Jun 5 12:26:55 dccpServer kernel: [ 1027.751756] ======================= Jun 5 12:26:55 dccpServer kernel: [ 1027.751758] Code: 07 83 f8 02 75 15 eb 07 bb 01 00 00 00 eb 0c a1 2c 4b 41 c0 e8 f7 bc de ff 09 c3 83 c4 10 89 d8 5b 5e 5f 5d c3 55 8b 40 18 89 e5 <c6> 00 cc 5d c3 55 8b 50 18 89 e5 8a 40 34 88 02 5d c3 a3 20 cb Jun 5 12:26:55 dccpServer kernel: [ 1027.751797] EIP: [<c0320687>] arch_arm_kprobe+0x6/0xb SS:ESP 0068:e5f74ea0 Jun 5 12:26:55 dccpServer kernel: [ 1027.751806] BUG: sleeping function called from invalid context at kernel/rwsem.c:20 Jun 5 12:26:55 dccpServer kernel: [ 1027.751809] in_atomic():0, irqs_disabled():1 Jun 5 12:26:55 dccpServer kernel: [ 1027.751812] INFO: lockdep is turned off. Jun 5 12:26:55 dccpServer kernel: [ 1027.751814] irq event stamp: 4018 Jun 5 12:26:55 dccpServer kernel: [ 1027.751815] hardirqs last enabled at (4017): [<c031fa9d>] _spin_unlock_irqrestore+0x36/0x59 Jun 5 12:26:55 dccpServer kernel: [ 1027.751821] hardirqs last disabled at (4018): [<c031f77f>] _spin_lock_irqsave+0x12/0x4e Jun 5 12:26:55 dccpServer kernel: [ 1027.751825] softirqs last enabled at (4002): [<c011bef6>] __do_softirq+0xa3/0xa8 Jun 5 12:26:55 dccpServer kernel: [ 1027.751831] softirqs last disabled at (3993): [<c0105daa>] do_softirq+0x5b/0xc9 Jun 5 12:26:55 dccpServer kernel: [ 1027.751836] [<c0104d52>] show_trace_log_lvl+0x1a/0x2f Jun 5 12:26:55 dccpServer kernel: [ 1027.751840] [<c0105845>] show_trace+0x12/0x14 Jun 5 12:26:55 dccpServer kernel: [ 1027.751843] [<c01058cb>] dump_stack+0x15/0x17 Jun 5 12:26:55 dccpServer kernel: [ 1027.751847] [<c0114420>] __might_sleep+0xc7/0xcd Jun 5 12:26:55 dccpServer kernel: [ 1027.751850] [<c0129d91>] down_read+0x18/0x4b Jun 5 12:26:55 dccpServer kernel: [ 1027.751854] [<c0139f71>] acct_collect+0x3a/0x135 Jun 5 12:26:55 dccpServer kernel: [ 1027.751858] [<c011a4d5>] do_exit+0x1b2/0x6b1 Jun 5 12:26:55 dccpServer kernel: [ 1027.751862] [<c0105321>] die+0x1da/0x200 Jun 5 12:26:55 dccpServer kernel: [ 1027.751866] [<c03213ab>] do_page_fault+0x436/0x509 Jun 5 12:26:55 dccpServer kernel: [ 1027.751869] [<c031fd4a>] error_code+0x6a/0x70 Jun 5 12:26:55 dccpServer kernel: [ 1027.751873] [<c0321921>] __register_kprobe+0x23a/0x294 Jun 5 12:26:55 dccpServer kernel: [ 1027.751876] [<c0321994>] register_jprobe+0x19/0x1b Jun 5 12:26:55 dccpServer kernel: [ 1027.751880] [<f8a27076>] dccpprobe_init+0x76/0xb4 [dccp_probe] Jun 5 12:26:55 dccpServer kernel: [ 1027.751885] [<c0137d1f>] sys_init_module+0x12d5/0x1415 Jun 5 12:26:55 dccpServer kernel: [ 1027.751890 ] [<c0103db2>] sysenter_past_esp+0x5f/0x99 Jun 5 12:26:55 dccpServer kernel: [ 1027.751893] ======================= Let me know if you need anything else. rgds, Patrick. -- Web: http://wand.net.nz/~iam4/ Blog: http://iansblog.jandi.co.nz WAND Network Research Group
Attachment:
config-2.6.22-rc2final-dccp
Description: Binary data
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