2008-06-02 09:09:03

by Eric Sesterhenn

[permalink] [raw]
Subject: BUG in scatterlist.h when loading tcrypt

Hi,

i guess this shouldnt happen, got this
when loading the tcrypt module

[ 60.113277] testing ecb(seed) decryption across pages (chunking)
[ 60.113309]
[ 60.113311] testing cts(cbc(aes)) encryption
[ 60.120984] test 1 (128 bit key):
[ 60.121153] ------------[ cut here ]------------
[ 60.121312] kernel BUG at include/linux/scatterlist.h:65!
[ 60.121446] invalid opcode: 0000 [#1] PREEMPT DEBUG_PAGEALLOC
[ 60.121828] Modules linked in: tcrypt(+)
[ 60.122019]
[ 60.122019] Pid: 4100, comm: modprobe Not tainted
(2.6.26-rc4-00103-g1beee8d #7)
[ 60.122019] EIP: 0060:[<c043feb0>] EFLAGS: 00010216 CPU: 0
[ 60.122019] EIP is at cts_cbc_encrypt+0x2f0/0x300
[ 60.122019] EAX: c11808e0 EBX: 00000010 ECX: c1002000 EDX: c11813c0
[ 60.122019] ESI: cbd4a5a0 EDI: cbf47bc0 EBP: cbf47c7c ESP: cbf47b3c
[ 60.122019] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
[ 60.122019] Process modprobe (pid: 4100, ti=cbf47000 task=cbf0ef20
task.ti=cbf47000)
[ 60.122019] Stack: 00000011 00000000 00000046 00000001 00000046
c0a2c4c0 00000000 cbf47b60
[ 60.122019] c01464ad cbf47b9c 00000046 00000046 00000000
cbf47b8c c014048e cbf47ba4
[ 60.122019] 00014f76 6f772049 20646c75 656b696c 65687420
00000020 00000000 00000000
[ 60.122019] Call Trace:
[ 60.122019] [<c01464ad>] ? put_lock_stats+0xd/0x30
[ 60.122019] [<c014048e>] ? getnstimeofday+0x3e/0x100
[ 60.122019] [<c013e26e>] ? hrtimer_interrupt+0x15e/0x190
[ 60.122019] [<c01884c1>] ? check_bytes_and_report+0x21/0xc0
[ 60.122019] [<c01881a3>] ? slab_pad_check+0x73/0x110
[ 60.122019] [<c01898e3>] ? __slab_free+0x63/0x2e0
[ 60.122019] [<c043ff9e>] ? crypto_cts_encrypt+0xde/0x100
[ 60.122019] [<c0433085>] ? setkey+0xc5/0xf0
[ 60.122019] [<c0433978>] ? async_encrypt+0x38/0x50
[ 60.122019] [<d0aab5a5>] ? test_cipher+0x215/0x840 [tcrypt]
[ 60.122019] [<c014048e>] ? getnstimeofday+0x3e/0x100
[ 60.122019] [<c0143649>] ? clockevents_program_event+0x99/0x110
[ 60.122019] [<c0144622>] ? tick_program_event+0x42/0x70
[ 60.122019] [<c013e26e>] ? hrtimer_interrupt+0x15e/0x190
[ 60.122019] [<c0103e57>] ? restore_nocheck+0x12/0x15
[ 60.122019] [<d0abea40>] ? tcrypt_mod_init+0x1a40/0x1bf4 [tcrypt]
[ 60.122019] [<c013ef6a>] ? blocking_notifier_call_chain+0x1a/0x20
[ 60.122019] [<c0150cfe>] ? sys_init_module+0xee/0x18e0
[ 60.122019] [<c0167e44>] ? unlock_page+0x24/0x30
[ 60.122019] [<c018ad10>] ? __kmalloc+0x0/0x100
[ 60.122019] [<c0103d6d>] ? sysenter_past_esp+0x6a/0xb1
[ 60.122019] =======================
[ 60.122019] Code: 0b eb fe 0f 0b eb fe 8d 74 26 00 0f 0b eb fe 0f 0b
eb fe 0f 0b eb fe 8d 74 26 00 0f 0b eb fe 0f 0b eb fe 0f 0b eb fe 8d 74
26 00 <0f> 0b eb fe 8d b6 00 00 00 00 8d bf 00 00 00 00 55 89 e5 83 ec
[ 60.122019] EIP: [<c043feb0>] cts_cbc_encrypt+0x2f0/0x300 SS:ESP
0068:cbf47b3c
[ 60.174099] ---[ end trace 4865479eed551e02 ]---

easily reproducible, but stack strace looks a bit different

[ 353.926510]
[ 353.926512] testing ecb(seed) decryption across pages (chunking)
[ 353.926540]
[ 353.926542] testing cts(cbc(aes)) encryption
[ 353.930471] test 1 (128 bit key):
[ 353.930603] ------------[ cut here ]------------
[ 353.930758] kernel BUG at include/linux/scatterlist.h:65!
[ 353.930890] invalid opcode: 0000 [#1] PREEMPT DEBUG_PAGEALLOC
[ 353.931017] Modules linked in: tcrypt(+)
[ 353.931017]
[ 353.931017] Pid: 4391, comm: modprobe Not tainted
(2.6.26-rc4-00103-g1beee8d #7)
[ 353.931017] EIP: 0060:[<c043feb0>] EFLAGS: 00010216 CPU: 0
[ 353.931017] EIP is at cts_cbc_encrypt+0x2f0/0x300
[ 353.931017] EAX: c1181f00 EBX: 00000010 ECX: c1002000 EDX: c113a600
[ 353.931017] ESI: cf3fb480 EDI: cbff8bc0 EBP: cbff8c7c ESP: cbff8b3c
[ 353.931017] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
[ 353.931017] Process modprobe (pid: 4391, ti=cbff8000 task=cbecafa0
task.ti=cbff8000)
[ 353.931017] Stack: 00000011 00000000 37318b74 39333034 c08a4261
cfae50b8 0000005a 00000008
[ 353.931017] c09b7160 cbff8b74 00000001 c11f7c80 cfae4c90
c11f7c80 cbff8bac c0189336
[ 353.931017] 00000001 6f772049 20646c75 656b696c 65687420
00000020 00000000 00000000
[ 353.931017] Call Trace:
[ 353.931017] [<c0189336>] ? __slab_alloc+0x86/0x5d0
[ 353.931017] [<c0755579>] ? _spin_unlock_irqrestore+0x39/0x70
[ 353.931017] [<c0127bcb>] ? release_console_sem+0x1bb/0x1e0
[ 353.931017] [<c01884c1>] ? check_bytes_and_report+0x21/0xc0
[ 353.931017] [<c01881a3>] ? slab_pad_check+0x73/0x110
[ 353.931017] [<c01898e3>] ? __slab_free+0x63/0x2e0
[ 353.931017] [<c043ff9e>] ? crypto_cts_encrypt+0xde/0x100
[ 353.931017] [<c0433085>] ? setkey+0xc5/0xf0
[ 353.931017] [<c0433978>] ? async_encrypt+0x38/0x50
[ 353.931017] [<d0aab5a5>] ? test_cipher+0x215/0x840 [tcrypt]
[ 353.931017] [<d0aaa55a>] ? test_hash+0x1fa/0x4f0 [tcrypt]
[ 353.931017] [<d0abea40>] ? tcrypt_mod_init+0x1a40/0x1bf4 [tcrypt]
[ 353.931017] [<c013ef6a>] ? blocking_notifier_call_chain+0x1a/0x20
[ 353.931017] [<c0150cfe>] ? sys_init_module+0xee/0x18e0
[ 353.931017] [<c0167e44>] ? unlock_page+0x24/0x30
[ 353.931017] [<c018ad10>] ? __kmalloc+0x0/0x100
[ 353.931017] [<c0103d6d>] ? sysenter_past_esp+0x6a/0xb1
[ 353.931017] =======================
[ 353.931017] Code: 0b eb fe 0f 0b eb fe 8d 74 26 00 0f 0b eb fe 0f 0b
eb fe 0f 0b eb fe 8d 74 26 00 0f 0b eb fe 0f 0b eb fe 0f 0b eb fe 8d 74
26 00 <0f> 0b eb fe 8d b6 00 00 00 00 8d bf 00 00 00 00 55 89 e5 83 ec
[ 353.931017] EIP: [<c043feb0>] cts_cbc_encrypt+0x2f0/0x300 SS:ESP
0068:cbff8b3c
[ 353.963393] ---[ end trace c587ad3c4d33078a ]---

Some corresponding .config variables

[email protected]:~# grep _CTS /usr/src/linux/.config
CONFIG_CRYPTO_CTS=y
[email protected]:~# grep _CBC /usr/src/linux/.config
CONFIG_CRYPTO_CBC=y
[email protected]:~# grep _AES /usr/src/linux/.config
CONFIG_CRYPTO_AES=y
CONFIG_CRYPTO_AES_586=y


Greetings, Eric


2008-06-02 10:46:34

by Evgeniy Polyakov

[permalink] [raw]
Subject: Re: BUG in scatterlist.h when loading tcrypt

Hi.

On Mon, Jun 02, 2008 at 11:08:59AM +0200, Eric Sesterhenn ([email protected]) wrote:
> i guess this shouldnt happen, got this
> when loading the tcrypt module
>
> [ 60.113277] testing ecb(seed) decryption across pages (chunking)
> [ 60.113309]
> [ 60.113311] testing cts(cbc(aes)) encryption
> [ 60.120984] test 1 (128 bit key):
> [ 60.121153] ------------[ cut here ]------------
> [ 60.121312] kernel BUG at include/linux/scatterlist.h:65!

Fix will be in Linus' tree soon, Herbert just pushed it upstream.
http://git.kernel.org/?p=linux/kernel/git/herbert/crypto-2.6.git;a=commit;h=c4913c7b71abc79b008a3c118628cfb59bdb0efc

--
Evgeniy Polyakov