* Re: [Bugme-new] [Bug 8961] New: BUG triggered by oidentd in netlink code
[not found] <bug-8961-10286@http.bugzilla.kernel.org/>
@ 2007-08-31 1:08 ` Andrew Morton
2007-08-31 11:05 ` Patrick McHardy
0 siblings, 1 reply; 8+ messages in thread
From: Andrew Morton @ 2007-08-31 1:08 UTC (permalink / raw)
To: netdev; +Cc: bugme-daemon, link
On Thu, 30 Aug 2007 07:41:31 -0700 (PDT) bugme-daemon@bugzilla.kernel.org wrote:
> http://bugzilla.kernel.org/show_bug.cgi?id=8961
This looks serious.
> Summary: BUG triggered by oidentd in netlink code
> Product: Other
> Version: 2.5
> KernelVersion: 2.6.22.3
> Platform: All
> OS/Version: Linux
> Tree: Mainline
> Status: NEW
> Severity: normal
> Priority: P1
> Component: Other
> AssignedTo: other_other@kernel-bugs.osdl.org
> ReportedBy: link@miggy.org
>
>
> Most recent kernel where this bug did not occur: 2.6.21.2
> Distribution: Debian/Etch
> Hardware Environment: uk2.net host server
> lspci says->
> 00:00.0 Host bridge: Intel Corporation 82845G/GL[Brookdale-G]/GE/PE DRAM
> Controller/Host-Hub Interface (rev 03)
> 00:02.0 VGA compatible controller: Intel Corporation 82845G/GL[Brookdale-G]/GE
> Chipset Integrated Graphics Device (rev 03)
> 00:1d.0 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M)
> USB UHCI Controller #1 (rev 02)
> 00:1d.1 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M)
> USB UHCI Controller #2 (rev 02)
> 00:1d.2 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M)
> USB UHCI Controller #3 (rev 02)
> 00:1d.7 USB Controller: Intel Corporation 82801DB/DBM (ICH4/ICH4-M) USB2 EHCI
> Controller (rev 02)
> 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 82)
> 00:1f.0 ISA bridge: Intel Corporation 82801DB/DBL (ICH4/ICH4-L) LPC Interface
> Bridge (rev 02)
> 00:1f.1 IDE interface: Intel Corporation 82801DB (ICH4) IDE Controller (rev 02)
> 00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM
> (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 02)
> 03:06.0 RAID bus controller: 3ware Inc 7xxx/8xxx-series PATA/SATA-RAID (rev 01)
> 03:0a.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
> RTL-8139/8139C/8139C+ (rev 10)
> Software Environment: oidentd
> Problem Description:
> Something in oidentd's use of netlink is triggering a BUG
> Steps to reproduce:
> Setup a Debian/Etch box, install oidentd, run a 2.6.22.3 kernel, ensure there
> are sufficient connections to the oidentd service and wait.
>
> 'Oops' output:
>
> Aug 29 23:28:44 bowl kernel: [349587.500440] BUG: unable to handle kernel NULL
> pointer dereference<1>BUG: unable to handle kernel NULL pointer dereference at
> virtual address 00000054
> Aug 29 23:28:44 bowl kernel: [349587.500454] printing eip:
> Aug 29 23:28:45 bowl kernel: [349587.500457] c03318ae
> Aug 29 23:28:45 bowl kernel: [349587.500459] *pde = 00000000
> Aug 29 23:28:45 bowl kernel: [349587.500464] Oops: 0000 [#1]
> Aug 29 23:28:45 bowl kernel: [349587.500466] PREEMPT SMP
> Aug 29 23:28:46 bowl kernel: [349587.500474] Modules linked in: w83627hf
> hwmon_vid i2c_isa
> Aug 29 23:28:46 bowl kernel: [349587.500483] CPU: 0
> Aug 29 23:28:47 bowl kernel: [349587.500485] EIP: 0060:[<c03318ae>] Not
> tainted VLI
> Aug 29 23:28:47 bowl kernel: [349587.500487] EFLAGS: 00010246 (2.6.22.3 #1)
> Aug 29 23:28:47 bowl kernel: [349587.500499] EIP is at netlink_rcv_skb+0xa/0x7e
> Aug 29 23:28:48 bowl kernel: [349587.500506] eax: 00000000 ebx: 00000000
> ecx: c148d2a0 edx: c0398819
> Aug 29 23:28:48 bowl kernel: [349587.500510] esi: 00000000 edi: c0398819
> ebp: c7a21c8c esp: c7a21c80
> Aug 29 23:28:48 bowl kernel: [349587.500517] ds: 007b es: 007b fs: 00d8
> gs: 0033 ss: 0068
> Aug 29 23:28:50 bowl kernel: [349587.500521] Process oidentd (pid: 17943,
> ti=c7a20000 task=cee231c0 task.ti=c7a20000)
> Aug 29 23:28:51 bowl kernel: [349587.500527] Stack: 00000000 c7a21cac f7c8ba78
> c7a21ca4 c0331962 c0398819 f7c8ba00 0000004c
> Aug 29 23:28:52 bowl kernel: [349587.500542] f736f000 c7a21cb4 c03988e3
> 00000001 f7c8ba00 c7a21cc4 c03312a5 0000004c
> Aug 29 23:28:54 bowl kernel: [349587.500558] f7c8ba00 c7a21cd4 c0330681
> f7c8ba00 e4695280 c7a21d00 c03307c6 7fffffff
> Aug 29 23:28:54 bowl kernel: [349587.500578] Call Trace:
> Aug 29 23:28:54 bowl kernel: [349587.500581] [<c010361a>]
> show_trace_log_lvl+0x1c/0x33
> Aug 29 23:28:55 bowl kernel: [349587.500591] [<c01036d4>]
> show_stack_log_lvl+0x8d/0xaa
> Aug 29 23:28:57 bowl kernel: [349587.500595] [<c010390e>]
> show_registers+0x1cb/0x321
> Aug 29 23:28:59 bowl kernel: [349587.500604] [<c0103bff>] die+0x112/0x1e1
> Aug 29 23:29:00 bowl kernel: [349587.500607] [<c01132d2>]
> do_page_fault+0x229/0x565
> Aug 29 23:29:05 bowl kernel: [349587.500618] [<c03c8d3a>] error_code+0x72/0x78
> Aug 29 23:29:07 bowl kernel: [349587.500625] [<c0331962>]
> netlink_run_queue+0x40/0x76
> Aug 29 23:29:07 bowl kernel: [349587.500632] [<c03988e3>]
> inet_diag_rcv+0x1f/0x2c
> Aug 29 23:29:07 bowl kernel: [349587.500639] [<c03312a5>]
> netlink_data_ready+0x57/0x59
> Aug 29 23:29:08 bowl kernel: [349587.500643] [<c0330681>]
> netlink_sendskb+0x24/0x45
> Aug 29 23:29:08 bowl kernel: [349587.500651] [<c03307c6>]
> netlink_unicast+0x100/0x116
> Aug 29 23:29:08 bowl kernel: [349587.500656] [<c0330f83>]
> netlink_sendmsg+0x1c2/0x280
> Aug 29 23:29:09 bowl kernel: [349587.500664] [<c02fcce9>]
> sock_sendmsg+0xba/0xd5
> Aug 29 23:29:12 bowl kernel: [349587.500671] [<c02fe4d1>]
> sys_sendmsg+0x17b/0x1e8
> Aug 29 23:29:12 bowl kernel: [349587.500676] [<c02fe92d>]
> sys_socketcall+0x230/0x24d
> Aug 29 23:29:13 bowl kernel: [349587.500684] [<c01028d2>] syscall_call+0x7/0xb
> Aug 29 23:29:13 bowl kernel: [349587.500691] =======================
> Aug 29 23:29:13 bowl kernel: [349587.500693] Code: f0 ff 4e 18 0f 94 c0 84 c0
> 0f 84 66 ff ff ff 89 f0 e8 86 e2 fc ff e9 5a ff ff ff f0 ff 40 10 eb be 55 89
> e5 57 89 d7 56 89 c6 53 <8b> 50 54 83 fa 10 72 55 8b 9e 9c 00 00 00 31 c9 8b 03
> 83 f8 0f
> Aug 29 23:29:13 bowl kernel: [349587.500770] EIP: [<c03318ae>]
> netlink_rcv_skb+0xa/0x7e SS:ESP 0068:c7a21c80
> Aug 29 23:29:13 bowl kernel: [349587.501851] at virtual address 00000054
> Aug 29 23:29:13 bowl kernel: [349587.501913] printing eip:
> Aug 29 23:29:14 bowl kernel: [349587.501963] c03318ae
> Aug 29 23:29:14 bowl kernel: [349587.502022] *pde = 00000000
> Aug 29 23:29:15 bowl kernel: [349587.502079] Oops: 0000 [#2]
> Aug 29 23:29:15 bowl kernel: [349587.502136] PREEMPT SMP
> Aug 29 23:29:15 bowl kernel: [349587.502271] Modules linked in: w83627hf
> hwmon_vid i2c_isa
> Aug 29 23:29:16 bowl kernel: [349587.502489] CPU: 1
> Aug 29 23:29:16 bowl kernel: [349587.502490] EIP: 0060:[<c03318ae>] Not
> tainted VLI
> Aug 29 23:29:17 bowl kernel: [349587.502491] EFLAGS: 00010246 (2.6.22.3 #1)
> Aug 29 23:29:17 bowl kernel: [349587.502647] EIP is at netlink_rcv_skb+0xa/0x7e
> Aug 29 23:29:17 bowl kernel: [349587.502691] eax: 00000000 ebx: 00000000
> ecx: c14346a0 edx: c0398819
> Aug 29 23:29:17 bowl kernel: [349587.502737] esi: 00000000 edi: c0398819
> ebp: e37f3c8c esp: e37f3c80
> Aug 29 23:29:17 bowl kernel: [349587.502783] ds: 007b es: 007b fs: 00d8
> gs: 0033 ss: 0068
> Aug 29 23:29:17 bowl kernel: [349587.502828] Process oidentd (pid: 17945,
> ti=e37f2000 task=dc69e6e0 task.ti=e37f2000)
> Aug 29 23:29:18 bowl kernel: [349587.502875] Stack: 00000000 e37f3cac f7c8ba78
> e37f3ca4 c0331962 c0398819 f7c8ba00 0000004c
> Aug 29 23:29:18 bowl kernel: [349587.503198] f736f000 e37f3cb4 c03988e3
> 00000001 f7c8ba00 e37f3cc4 c03312a5 0000004c
> Aug 29 23:29:18 bowl kernel: [349587.503519] f7c8ba00 e37f3cd4 c0330681
> f7c8ba00 e1a35a80 e37f3d00 c03307c6 7fffffff
> Aug 29 23:29:18 bowl kernel: [349587.503839] Call Trace:
> Aug 29 23:29:18 bowl kernel: [349587.503917] [<c010361a>]
> show_trace_log_lvl+0x1c/0x33
> Aug 29 23:29:18 bowl kernel: [349587.503994] [<c01036d4>]
> show_stack_log_lvl+0x8d/0xaa
> Aug 29 23:29:18 bowl kernel: [349587.504067] [<c010390e>]
> show_registers+0x1cb/0x321
> Aug 29 23:29:18 bowl kernel: [349587.504142] [<c0103bff>] die+0x112/0x1e1
> Aug 29 23:29:18 bowl kernel: [349587.504215] [<c01132d2>]
> do_page_fault+0x229/0x565
> Aug 29 23:29:18 bowl kernel: [349587.504290] [<c03c8d3a>] error_code+0x72/0x78
> Aug 29 23:29:18 bowl kernel: [349587.504366] [<c0331962>]
> netlink_run_queue+0x40/0x76
> Aug 29 23:29:18 bowl kernel: [349587.504440] [<c03988e3>]
> inet_diag_rcv+0x1f/0x2c
> Aug 29 23:29:18 bowl kernel: [349587.504514] [<c03312a5>]
> netlink_data_ready+0x57/0x59
> Aug 29 23:29:18 bowl kernel: [349587.504589] [<c0330681>]
> netlink_sendskb+0x24/0x45
> Aug 29 23:29:18 bowl kernel: [349587.504662] [<c03307c6>]
> netlink_unicast+0x100/0x116
> Aug 29 23:29:19 bowl kernel: [349587.504736] [<c0330f83>]
> netlink_sendmsg+0x1c2/0x280
> Aug 29 23:29:19 bowl kernel: [349587.504809] [<c02fcce9>]
> sock_sendmsg+0xba/0xd5
> Aug 29 23:29:19 bowl kernel: [349587.504885] [<c02fe4d1>]
> sys_sendmsg+0x17b/0x1e8
> Aug 29 23:29:19 bowl kernel: [349587.504958] [<c02fe92d>]
> sys_socketcall+0x230/0x24d
> Aug 29 23:29:19 bowl kernel: [349587.505032] [<c01028d2>] syscall_call+0x7/0xb
> Aug 29 23:29:19 bowl kernel: [349587.505105] =======================
> Aug 29 23:29:19 bowl kernel: [349587.505146] Code: f0 ff 4e 18 0f 94 c0 84 c0
> 0f 84 66 ff ff ff 89 f0 e8 86 e2 fc ff e9 5a ff ff ff f0 ff 40 10 eb be 55 89
> e5 57 89 d7 56 89 c6 53 <8b> 50 54 83 fa 10 72 55 8b 9e 9c 00 00 00 31 c9 8b 03
> 83 f8 0f
> Aug 29 23:29:19 bowl kernel: [349587.507160] EIP: [<c03318ae>]
> netlink_rcv_skb+0xa/0x7e SS:ESP 0068:e37f3c80
> Aug 29 23:43:48 bowl kernel: [350485.786725] BUG: unable to handle kernel NULL
> pointer dereference<1>BUG: unable to handle kernel NULL pointer dereference at
> virtual address 00000054
> Aug 29 23:43:48 bowl kernel: [350485.786739] printing eip:
> Aug 29 23:43:48 bowl kernel: [350485.786743] c03318ae
> Aug 29 23:43:48 bowl kernel: [350485.786745] *pde = 00000000
> Aug 29 23:43:48 bowl kernel: [350485.786750] Oops: 0000 [#3]
> Aug 29 23:43:49 bowl kernel: [350485.786751] PREEMPT SMP
> Aug 29 23:43:49 bowl kernel: [350485.786755] Modules linked in: w83627hf
> hwmon_vid i2c_isa
> Aug 29 23:43:49 bowl kernel: [350485.786763] CPU: 0
> Aug 29 23:43:49 bowl kernel: [350485.786765] EIP: 0060:[<c03318ae>] Not
> tainted VLI
> Aug 29 23:43:49 bowl kernel: [350485.786766] EFLAGS: 00010246 (2.6.22.3 #1)
> Aug 29 23:43:49 bowl kernel: [350485.786781] EIP is at netlink_rcv_skb+0xa/0x7e
> Aug 29 23:43:49 bowl kernel: [350485.786785] eax: 00000000 ebx: 00000000
> ecx: c148d2a0 edx: c0398819
> Aug 29 23:43:49 bowl kernel: [350485.786789] esi: 00000000 edi: c0398819
> ebp: dee05c8c esp: dee05c80
> Aug 29 23:43:50 bowl kernel: [350485.786792] ds: 007b es: 007b fs: 00d8
> gs: 0033 ss: 0068
> Aug 29 23:43:50 bowl kernel: [350485.786795] Process oidentd (pid: 21495,
> ti=dee04000 task=dc69e6e0 task.ti=dee04000)
> Aug 29 23:43:50 bowl kernel: [350485.786798] Stack: 00000000 dee05cac f7c8ba78
> dee05ca4 c0331962 c0398819 f7c8ba00 0000004c
> Aug 29 23:43:50 bowl kernel: [350485.786807] f736f000 dee05cb4 c03988e3
> 00000001 f7c8ba00 dee05cc4 c03312a5 0000004c
> Aug 29 23:43:51 bowl kernel: [350485.786816] f7c8ba00 dee05cd4 c0330681
> f7c8ba00 e4695980 dee05d00 c03307c6 7fffffff
> Aug 29 23:43:51 bowl kernel: [350485.786829] Call Trace:
> Aug 29 23:43:51 bowl kernel: [350485.786832] [<c010361a>]
> show_trace_log_lvl+0x1c/0x33
> Aug 29 23:43:51 bowl kernel: [350485.786839] [<c01036d4>]
> show_stack_log_lvl+0x8d/0xaa
> Aug 29 23:43:52 bowl kernel: [350485.786844] [<c010390e>]
> show_registers+0x1cb/0x321
> Aug 29 23:43:52 bowl kernel: [350485.786848] [<c0103bff>] die+0x112/0x1e1
> Aug 29 23:43:52 bowl kernel: [350485.786852] [<c01132d2>]
> do_page_fault+0x229/0x565
> Aug 29 23:43:52 bowl kernel: [350485.786859] [<c03c8d3a>] error_code+0x72/0x78
> Aug 29 23:43:52 bowl kernel: [350485.786870] [<c0331962>]
> netlink_run_queue+0x40/0x76
> Aug 29 23:43:52 bowl kernel: [350485.786875] [<c03988e3>]
> inet_diag_rcv+0x1f/0x2c
> Aug 29 23:43:52 bowl kernel: [350485.786880] [<c03312a5>]
> netlink_data_ready+0x57/0x59
> Aug 29 23:43:53 bowl kernel: [350485.786885] [<c0330681>]
> netlink_sendskb+0x24/0x45
> Aug 29 23:43:53 bowl kernel: [350485.786889] [<c03307c6>]
> netlink_unicast+0x100/0x116
> Aug 29 23:43:53 bowl kernel: [350485.786893] [<c0330f83>]
> netlink_sendmsg+0x1c2/0x280
> Aug 29 23:43:53 bowl kernel: [350485.786898] [<c02fcce9>]
> sock_sendmsg+0xba/0xd5
> Aug 29 23:43:53 bowl kernel: [350485.786909] [<c02fe4d1>]
> sys_sendmsg+0x17b/0x1e8
> Aug 29 23:43:53 bowl kernel: [350485.786914] [<c02fe92d>]
> sys_socketcall+0x230/0x24d
> Aug 29 23:43:53 bowl kernel: [350485.786919] [<c01028d2>] syscall_call+0x7/0xb
> Aug 29 23:43:53 bowl kernel: [350485.786923] =======================
> Aug 29 23:43:53 bowl kernel: [350485.786926] Code: f0 ff 4e 18 0f 94 c0 84 c0
> 0f 84 66 ff ff ff 89 f0 e8 86 e2 fc ff e9 5a ff ff ff f0 ff 40 10 eb be 55 89
> e5 57 89 d7 56 89 c6 53 <8b> 50 54 83 fa 10 72 55 8b 9e 9c 00 00 00 31 c9 8b 03
> 83 f8 0f
> Aug 29 23:43:53 bowl kernel: [350485.786976] EIP: [<c03318ae>]
> netlink_rcv_skb+0xa/0x7e SS:ESP 0068:dee05c80
> Aug 29 23:43:53 bowl kernel: [350485.790485] at virtual address 00000054
> Aug 29 23:43:53 bowl kernel: [350485.790557] printing eip:
> Aug 29 23:43:53 bowl kernel: [350485.790613] c03318ae
> Aug 29 23:43:53 bowl kernel: [350485.790665] *pde = 00000000
> Aug 29 23:43:53 bowl kernel: [350485.790727] Oops: 0000 [#4]
> Aug 29 23:43:53 bowl kernel: [350485.790779] PREEMPT SMP
> Aug 29 23:43:53 bowl kernel: [350485.790907] Modules linked in: w83627hf
> hwmon_vid i2c_isa
> Aug 29 23:43:53 bowl kernel: [350485.791103] CPU: 1
> Aug 29 23:43:53 bowl kernel: [350485.791104] EIP: 0060:[<c03318ae>] Not
> tainted VLI
> Aug 29 23:43:54 bowl kernel: [350485.791106] EFLAGS: 00010246 (2.6.22.3 #1)
> Aug 29 23:43:54 bowl kernel: [350485.791241] EIP is at netlink_rcv_skb+0xa/0x7e
> Aug 29 23:43:56 bowl kernel: [350485.791286] eax: 00000000 ebx: 00000000
> ecx: c153a920 edx: c0398819
> Aug 29 23:43:57 bowl kernel: [350485.791336] esi: 00000000 edi: c0398819
> ebp: eaa85c8c esp: eaa85c80
> Aug 29 23:43:57 bowl kernel: [350485.791389] ds: 007b es: 007b fs: 00d8
> gs: 0033 ss: 0068
> Aug 29 23:43:57 bowl kernel: [350485.791441] Process oidentd (pid: 21497,
> ti=eaa84000 task=caca0330 task.ti=eaa84000)
> Aug 29 23:43:57 bowl kernel: [350485.791492] Stack: 00000000 eaa85cac f7c8ba78
> eaa85ca4 c0331962 c0398819 f7c8ba00 0000004c
> Aug 29 23:43:57 bowl kernel: [350485.791825] f736f000 eaa85cb4 c03988e3
> 00000001 f7c8ba00 eaa85cc4 c03312a5 0000004c
> Aug 29 23:43:57 bowl kernel: [350485.792158] f7c8ba00 eaa85cd4 c0330681
> f7c8ba00 e9d49180 eaa85d00 c03307c6 7fffffff
> Aug 29 23:43:57 bowl kernel: [350485.792491] Call Trace:
> Aug 29 23:43:57 bowl kernel: [350485.792572] [<c010361a>]
> show_trace_log_lvl+0x1c/0x33
> Aug 29 23:43:57 bowl kernel: [350485.792653] [<c01036d4>]
> show_stack_log_lvl+0x8d/0xaa
> Aug 29 23:43:57 bowl kernel: [350485.792731] [<c010390e>]
> show_registers+0x1cb/0x321
> Aug 29 23:43:58 bowl kernel: [350485.792808] [<c0103bff>] die+0x112/0x1e1
> Aug 29 23:43:58 bowl kernel: [350485.792885] [<c01132d2>]
> do_page_fault+0x229/0x565
> Aug 29 23:43:58 bowl kernel: [350485.792963] [<c03c8d3a>] error_code+0x72/0x78
> Aug 29 23:43:58 bowl kernel: [350485.793043] [<c0331962>]
> netlink_run_queue+0x40/0x76
> Aug 29 23:43:58 bowl kernel: [350485.793123] [<c03988e3>]
> inet_diag_rcv+0x1f/0x2c
> Aug 29 23:43:58 bowl kernel: [350485.793208] [<c03312a5>]
> netlink_data_ready+0x57/0x59
> Aug 29 23:43:58 bowl kernel: [350485.793290] [<c0330681>]
> netlink_sendskb+0x24/0x45
> Aug 29 23:43:58 bowl kernel: [350485.793373] [<c03307c6>]
> netlink_unicast+0x100/0x116
> Aug 29 23:43:59 bowl kernel: [350485.793455] [<c0330f83>]
> netlink_sendmsg+0x1c2/0x280
> Aug 29 23:43:59 bowl kernel: [350485.793538] [<c02fcce9>]
> sock_sendmsg+0xba/0xd5
> Aug 29 23:43:59 bowl kernel: [350485.793641] [<c02fe4d1>]
> sys_sendmsg+0x17b/0x1e8
> Aug 29 23:43:59 bowl kernel: [350485.793732] [<c02fe92d>]
> sys_socketcall+0x230/0x24d
> Aug 29 23:43:59 bowl kernel: [350485.793822] [<c01028d2>] syscall_call+0x7/0xb
> Aug 29 23:44:00 bowl kernel: [350485.793919] =======================
> Aug 29 23:44:00 bowl kernel: [350485.793964] Code: f0 ff 4e 18 0f 94 c0 84 c0
> 0f 84 66 ff ff ff 89 f0 e8 86 e2 fc ff e9 5a ff ff ff f0 ff 40 10 eb be 55 89
> e5 57 89 d7 56 89 c6 53 <8b> 50 54 83 fa 10 72 55 8b 9e 9c 00 00 00 31 c9 8b 03
> 83 f8 0f
> Aug 29 23:44:00 bowl kernel: [350485.796458] EIP: [<c03318ae>]
> netlink_rcv_skb+0xa/0x7e SS:ESP 0068:eaa85c80
>
>
> --
> Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email
> ------- You are receiving this mail because: -------
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Bugme-new] [Bug 8961] New: BUG triggered by oidentd in netlink code
2007-08-31 1:08 ` [Bugme-new] [Bug 8961] New: BUG triggered by oidentd in netlink code Andrew Morton
@ 2007-08-31 11:05 ` Patrick McHardy
2007-08-31 12:38 ` Athanasius
0 siblings, 1 reply; 8+ messages in thread
From: Patrick McHardy @ 2007-08-31 11:05 UTC (permalink / raw)
To: Andrew Morton; +Cc: netdev, bugme-daemon, link
[-- Attachment #1: Type: TEXT/PLAIN, Size: 1506 bytes --]
On Thu, 30 Aug 2007, Andrew Morton wrote:
> On Thu, 30 Aug 2007 07:41:31 -0700 (PDT) bugme-daemon@bugzilla.kernel.org wrote:
>
>> http://bugzilla.kernel.org/show_bug.cgi?id=8961
>
> This looks serious.
>
>> Summary: BUG triggered by oidentd in netlink code
>>
>> Aug 29 23:28:44 bowl kernel: [349587.500440] BUG: unable to handle kernel NULL
>> pointer dereference<1>BUG: unable to handle kernel NULL pointer dereference at
>> virtual address 00000054
>> Aug 29 23:28:44 bowl kernel: [349587.500454] printing eip:
>> Aug 29 23:28:45 bowl kernel: [349587.500457] c03318ae
>> Aug 29 23:28:45 bowl kernel: [349587.500459] *pde = 00000000
>> Aug 29 23:28:45 bowl kernel: [349587.500464] Oops: 0000 [#1]
>> Aug 29 23:28:45 bowl kernel: [349587.500466] PREEMPT SMP
>> Aug 29 23:28:46 bowl kernel: [349587.500474] Modules linked in: w83627hf
>> hwmon_vid i2c_isa
>> Aug 29 23:28:46 bowl kernel: [349587.500483] CPU: 0
>> Aug 29 23:28:47 bowl kernel: [349587.500485] EIP: 0060:[<c03318ae>] Not
>> tainted VLI
>> Aug 29 23:28:47 bowl kernel: [349587.500487] EFLAGS: 00010246 (2.6.22.3 #1)
>> Aug 29 23:28:47 bowl kernel: [349587.500499] EIP is at netlink_rcv_skb+0xa/0x7e
>> Aug 29 23:28:48 bowl kernel: [349587.500506] eax: 00000000 ebx: 00000000
Seems to be a bug introduced by the netlink_run_queue conversion,
since there is no locking and netlink_run_queue doesn't check
for NULL results from skb_dequeue, it might pass NULL to
netlink_rcv_skb, which crashes.
Does this patch help?
[-- Attachment #2: Type: TEXT/PLAIN, Size: 597 bytes --]
diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index dbeacd8..8e1078d 100644
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -836,12 +836,17 @@ static int inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
return inet_diag_get_exact(skb, nlh);
}
+static DEFINE_MUTEX(inet_diag_mutex);
+
static void inet_diag_rcv(struct sock *sk, int len)
{
unsigned int qlen = 0;
do {
+ if (!mutex_trylock(&inet_diag_mutex))
+ return;
netlink_run_queue(sk, &qlen, &inet_diag_rcv_msg);
+ mutex_unlock(&inet_diag_mutex);
} while (qlen);
}
^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [Bugme-new] [Bug 8961] New: BUG triggered by oidentd in netlink code
2007-08-31 11:05 ` Patrick McHardy
@ 2007-08-31 12:38 ` Athanasius
2007-09-01 16:38 ` Patrick McHardy
0 siblings, 1 reply; 8+ messages in thread
From: Athanasius @ 2007-08-31 12:38 UTC (permalink / raw)
To: Patrick McHardy, linux-kernel; +Cc: Andrew Morton, netdev, bugme-daemon, link
[-- Attachment #1: Type: text/plain, Size: 863 bytes --]
On Fri, Aug 31, 2007 at 01:05:04PM +0200, Patrick McHardy wrote:
> Seems to be a bug introduced by the netlink_run_queue conversion,
> since there is no locking and netlink_run_queue doesn't check
> for NULL results from skb_dequeue, it might pass NULL to
> netlink_rcv_skb, which crashes.
>
> Does this patch help?
I'll compile up a new kernel, likely 2.6.22.6, plus this patch, and
reboot to it tonight. I still don't know *exactly* how to trigger the
bug on demand though, it's not reocurred since I posted the bug report
(but had happened about a week before as well).
thanks,
-Ath
--
- Athanasius = Athanasius(at)miggy.org / http://www.miggy.org/
Finger athan(at)fysh.org for PGP key
"And it's me who is my enemy. Me who beats me up.
Me who makes the monsters. Me who strips my confidence." Paula Cole - ME
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Bugme-new] [Bug 8961] New: BUG triggered by oidentd in netlink code
2007-08-31 12:38 ` Athanasius
@ 2007-09-01 16:38 ` Patrick McHardy
2007-09-01 17:39 ` Athanasius
2007-09-02 4:04 ` Herbert Xu
0 siblings, 2 replies; 8+ messages in thread
From: Patrick McHardy @ 2007-09-01 16:38 UTC (permalink / raw)
To: Athanasius; +Cc: linux-kernel, Andrew Morton, netdev, bugme-daemon
Athanasius wrote:
> I'll compile up a new kernel, likely 2.6.22.6, plus this patch, and
> reboot to it tonight. I still don't know *exactly* how to trigger the
> bug on demand though, it's not reocurred since I posted the bug report
> (but had happened about a week before as well).
Thanks. I'm not sure either, it would require two concurrent requests
to be processed, but AFAICS oidentd only uses a single netlink socket.
Perhaps multiple running instances or something else using the inet_diag
interface?
You might be able to trigger it without this patch by running
"while true; do ss -tn; done" while doing ident queries, but
just running the while loop a couple of times in parallel
doesn't seem to trigger it here.
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Bugme-new] [Bug 8961] New: BUG triggered by oidentd in netlink code
2007-09-01 16:38 ` Patrick McHardy
@ 2007-09-01 17:39 ` Athanasius
2007-09-01 22:53 ` Patrick McHardy
2007-09-02 4:04 ` Herbert Xu
1 sibling, 1 reply; 8+ messages in thread
From: Athanasius @ 2007-09-01 17:39 UTC (permalink / raw)
To: Patrick McHardy, linux-kernel; +Cc: Andrew Morton, netdev, bugme-daemon
[-- Attachment #1: Type: text/plain, Size: 1574 bytes --]
On Sat, Sep 01, 2007 at 06:38:23PM +0200, Patrick McHardy wrote:
> Athanasius wrote:
> > I'll compile up a new kernel, likely 2.6.22.6, plus this patch, and
> >reboot to it tonight. I still don't know *exactly* how to trigger the
> >bug on demand though, it's not reocurred since I posted the bug report
> >(but had happened about a week before as well).
>
> Thanks. I'm not sure either, it would require two concurrent requests
> to be processed, but AFAICS oidentd only uses a single netlink socket.
> Perhaps multiple running instances or something else using the inet_diag
> interface?
>
> You might be able to trigger it without this patch by running
> "while true; do ss -tn; done" while doing ident queries, but
> just running the while loop a couple of times in parallel
> doesn't seem to trigger it here.
I went for setting up a dummy listener in inetd, using tcpd, and
setting hosts.allow to specify myuser@ip. Then a few while loops
spamming it with connections using nc.
Anyway, on the old kernel that managed to trigger the BUG twice in
about 30 minutes. I'm now on 2.6.22.6 plus your patch and coming up on
an hour (55+ mins) of the same and no sign of the BUG.
So that looks like fixed to me. I'll weigh in again if the daily
logcheck throws up another.
-Ath
--
- Athanasius = Athanasius(at)miggy.org / http://www.miggy.org/
Finger athan(at)fysh.org for PGP key
"And it's me who is my enemy. Me who beats me up.
Me who makes the monsters. Me who strips my confidence." Paula Cole - ME
[-- Attachment #2: Digital signature --]
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Bugme-new] [Bug 8961] New: BUG triggered by oidentd in netlink code
2007-09-01 17:39 ` Athanasius
@ 2007-09-01 22:53 ` Patrick McHardy
0 siblings, 0 replies; 8+ messages in thread
From: Patrick McHardy @ 2007-09-01 22:53 UTC (permalink / raw)
To: Athanasius, Patrick McHardy, linux-kernel, Andrew Morton, netdev,
bugme-d
Athanasius wrote:
> On Sat, Sep 01, 2007 at 06:38:23PM +0200, Patrick McHardy wrote:
>>
>> You might be able to trigger it without this patch by running
>> "while true; do ss -tn; done" while doing ident queries, but
>> just running the while loop a couple of times in parallel
>> doesn't seem to trigger it here.
>
> I went for setting up a dummy listener in inetd, using tcpd, and
> setting hosts.allow to specify myuser@ip. Then a few while loops
> spamming it with connections using nc.
>
> Anyway, on the old kernel that managed to trigger the BUG twice in
> about 30 minutes. I'm now on 2.6.22.6 plus your patch and coming up on
> an hour (55+ mins) of the same and no sign of the BUG.
>
> So that looks like fixed to me. I'll weigh in again if the daily
> logcheck throws up another.
Thanks a lot for testing, I'll send a version for current -rc
upstream tommorrow.
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Bugme-new] [Bug 8961] New: BUG triggered by oidentd in netlink code
2007-09-01 16:38 ` Patrick McHardy
2007-09-01 17:39 ` Athanasius
@ 2007-09-02 4:04 ` Herbert Xu
2007-09-02 10:56 ` Patrick McHardy
1 sibling, 1 reply; 8+ messages in thread
From: Herbert Xu @ 2007-09-02 4:04 UTC (permalink / raw)
To: Patrick McHardy; +Cc: link, linux-kernel, akpm, netdev, bugme-daemon
Patrick McHardy <kaber@trash.net> wrote:
>
> Thanks. I'm not sure either, it would require two concurrent requests
> to be processed, but AFAICS oidentd only uses a single netlink socket.
> Perhaps multiple running instances or something else using the inet_diag
> interface?
Since identd serves requests from the outside world it is
quite possible for two identd instances to run simultaneously
serving two requests.
I'm not familiar with oidentd but this is certainly pidentd
works.
Cheers,
--
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Bugme-new] [Bug 8961] New: BUG triggered by oidentd in netlink code
2007-09-02 4:04 ` Herbert Xu
@ 2007-09-02 10:56 ` Patrick McHardy
0 siblings, 0 replies; 8+ messages in thread
From: Patrick McHardy @ 2007-09-02 10:56 UTC (permalink / raw)
To: Herbert Xu; +Cc: link, linux-kernel, akpm, netdev, bugme-daemon
Herbert Xu wrote:
> Patrick McHardy <kaber@trash.net> wrote:
>
>> Thanks. I'm not sure either, it would require two concurrent requests
>> to be processed, but AFAICS oidentd only uses a single netlink socket.
>> Perhaps multiple running instances or something else using the inet_diag
>> interface?
>>
>
> Since identd serves requests from the outside world it is
> quite possible for two identd instances to run simultaneously
> serving two requests.
>
> I'm not familiar with oidentd but this is certainly pidentd
> works.
Right, I forgot about inetd. Thanks Herbert :)
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2007-09-02 10:57 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
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2007-08-31 1:08 ` [Bugme-new] [Bug 8961] New: BUG triggered by oidentd in netlink code Andrew Morton
2007-08-31 11:05 ` Patrick McHardy
2007-08-31 12:38 ` Athanasius
2007-09-01 16:38 ` Patrick McHardy
2007-09-01 17:39 ` Athanasius
2007-09-01 22:53 ` Patrick McHardy
2007-09-02 4:04 ` Herbert Xu
2007-09-02 10:56 ` Patrick McHardy
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