[dm-devel] [PATCH v2 0/2] Introduce the bulk IV mode for improving the crypto engine efficiency
Milan Broz
gmazyland at gmail.com
Wed Dec 16 08:08:47 UTC 2015
On 12/16/2015 04:18 AM, Baolin Wang wrote:
> From the dm-crypt performance report, we found it shows low efficiency
> with crypto engine for some mode (like ecb or xts mode). Because in dm
> crypt, it will map the IO data buffer with scatterlist, and send the
> scatterlist of one bio to the encryption engine, if send more scatterlists
> with bigger size at one time, that helps the engine palys best performance,
> which means a high encryption speed.
>
> But now the dm-crypt only map one segment (always one sector) of one bio
> with one scatterlist to the crypto engine at one time. which is more
> time-consuming and ineffective for the crypto engine. Especially for some
> modes which don't need different IV for each sector, we can map the whole
> bio with multiple scatterlists to improve the engine performance.
>
> But this optimization is not support some ciphers and IV modes which should
> do sector by sector and need different IV for each sector.
>
> Change since v1:
> - Introduce one different IV mode.
> - Change the conditions for bulk mode.
I tried the patchset on 32bit Intel VM and kernel immediately OOPsed (just tried aes-ecb)...
Crash log below.
Milan
[ 40.989759] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 40.990736] IP: [<f8710d26>] crypt_sg_entry+0x186/0x270 [dm_crypt]
[ 40.990800] *pde = 00000000
[ 40.990844] Oops: 0000 [#1] PREEMPT SMP
[ 40.990961] Modules linked in: dm_crypt loop rpcsec_gss_krb5 dm_mod crc32_pclmul crc32c_intel ata_piix aesni_intel aes_i586 lrw ablk_helper cryptd
[ 40.991412] CPU: 2 PID: 6 Comm: kworker/u8:0 Not tainted 4.4.0-rc5+ #44
[ 40.991460] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 40.991531] Workqueue: kcryptd kcryptd_crypt [dm_crypt]
[ 40.991587] task: f4c04180 ti: f4c06000 task.ti: f4c06000
[ 40.991629] EIP: 0060:[<f8710d26>] EFLAGS: 00010246 CPU: 2
[ 40.991672] EIP is at crypt_sg_entry+0x186/0x270 [dm_crypt]
[ 40.991725] EAX: 00001000 EBX: 00001000 ECX: f73e85c0 EDX: 00000000
[ 40.991772] ESI: 00000000 EDI: 00001000 EBP: f4c07e28 ESP: f4c07de8
[ 40.991819] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 40.991862] CR0: 8005003b CR2: 00000000 CR3: 018c1000 CR4: 001406d0
[ 40.991949] Stack:
[ 40.991976] f49967c8 00000000 00000000 00000000 00000000 01000058 00000000 f73e85c0
[ 40.992173] 00000000 f4baf170 00001000 f4ba7290 00000000 f4baf030 f4baf170 f4baf0c0
[ 40.992387] f4c07e60 f8710e8a f4baf170 f4c07e4c f4baf170 f4baf114 f4baf160 f8713fe8
[ 40.992599] Call Trace:
[ 40.992647] [<f8710e8a>] crypt_convert_io+0x7a/0x360 [dm_crypt]
[ 40.992715] [<f87131e5>] kcryptd_crypt+0x395/0x3da [dm_crypt]
[ 40.992781] [<c1056e23>] process_one_work+0x153/0x420
[ 40.992842] [<c1056dd0>] ? process_one_work+0x100/0x420
[ 40.992905] [<c1057127>] worker_thread+0x37/0x470
[ 40.992964] [<c10570f0>] ? process_one_work+0x420/0x420
[ 40.993026] [<c105c326>] kthread+0x96/0xb0
[ 40.993083] [<c14e5389>] ret_from_kernel_thread+0x21/0x38
[ 40.993146] [<c105c290>] ? kthread_worker_fn+0xf0/0xf0
[ 40.993207] Code: c2 01 31 f6 85 db 75 d1 89 55 e0 85 ff 0f 85 41 ff ff ff 8b 55 d8 8d 65 f4 89 d0 5b 5e 5f 5d c3 90 8d 74 26 00 8b 55 c8 8b 4d dc <8b> 02 89 4d dc 89 45 c8 c1 e8 1a c1 e0 04 8b 80 80 a2 0b c2 83
[ 40.995405] EIP: [<f8710d26>] crypt_sg_entry+0x186/0x270 [dm_crypt] SS:ESP 0068:f4c07de8
[ 40.995604] CR2: 0000000000000000
[ 40.995703] ---[ end trace d78b89aae913dc1f ]---
[ 40.995825] ------------[ cut here ]------------
[ 40.995930] WARNING: CPU: 2 PID: 6 at kernel/softirq.c:150 __local_bh_enable_ip+0x88/0xd0()
[ 40.996118] Modules linked in: dm_crypt loop rpcsec_gss_krb5 dm_mod crc32_pclmul
[ 40.996352] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 40.996354] IP: [<f8710d26>] crypt_sg_entry+0x186/0x270 [dm_crypt]
[ 40.996357] *pde = 00000000
[ 40.996359] Oops: 0000 [#2] PREEMPT SMP
[ 40.996361] Modules linked in: dm_crypt loop rpcsec_gss_krb5 dm_mod crc32_pclmul crc32c_intel ata_piix aesni_intel aes_i586 lrw ablk_helper cryptd
[ 40.996368] CPU: 3 PID: 53 Comm: kworker/u8:1 Tainted: G D 4.4.0-rc5+ #44
[ 40.996369] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 40.996371] Workqueue: kcryptd kcryptd_crypt [dm_crypt]
[ 40.996372] task: f489c0c0 ti: f489e000 task.ti: f489e000
[ 40.996373] EIP: 0060:[<f8710d26>] EFLAGS: 00010246 CPU: 3
[ 40.996375] EIP is at crypt_sg_entry+0x186/0x270 [dm_crypt]
[ 40.996375] EAX: 00001000 EBX: 00001000 ECX: f71e3a20 EDX: 00000000
[ 40.996376] ESI: 00000000 EDI: 00010000 EBP: f489fe28 ESP: f489fde8
[ 40.996377] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 40.996377] CR0: 8005003b CR2: 00000000 CR3: 33c26000 CR4: 001406d0
[ 40.996410] Stack:
[ 40.996411] f49967c8 00000000 00000000 00000000 00000000 01000058 00000000 f71e3a20
[ 40.996413] 00000000 f4bed370 00001000 f4b2e7c0 00000000 f4bed230 f4bed370 f4bed2c0
[ 40.996415] f489fe60 f8710e8a f4bed370 f489fe4c f4bed370 f4bed314 f4bed360 f8713fe8
[ 40.996418] Call Trace:
[ 40.996421] [<f8710e8a>] crypt_convert_io+0x7a/0x360 [dm_crypt]
[ 40.996423] [<f87131e5>] kcryptd_crypt+0x395/0x3da [dm_crypt]
[ 40.996426] [<c1056e23>] process_one_work+0x153/0x420
[ 40.996428] [<c1056dd0>] ? process_one_work+0x100/0x420
[ 40.996430] [<c1057127>] worker_thread+0x37/0x470
[ 40.996432] [<c10570f0>] ? process_one_work+0x420/0x420
[ 40.996433] [<c105c326>] kthread+0x96/0xb0
[ 40.996436] [<c14e5389>] ret_from_kernel_thread+0x21/0x38
[ 40.996438] [<c105c290>] ? kthread_worker_fn+0xf0/0xf0
[ 40.996439] Code: c2 01 31 f6 85 db 75 d1 89 55 e0 85 ff 0f 85 41 ff ff ff 8b 55 d8 8d 65 f4 89 d0 5b 5e 5f 5d c3 90 8d 74 26 00 8b 55 c8 8b 4d dc <8b> 02 89 4d dc 89 45 c8 c1 e8 1a c1 e0 04 8b 80 80 a2 0b c2 83
[ 40.996453] EIP: [<f8710d26>] crypt_sg_entry+0x186/0x270 [dm_crypt] SS:ESP 0068:f489fde8
[ 40.996455] CR2: 0000000000000000
[ 40.996456] ---[ end trace d78b89aae913dc20 ]---
[ 40.996459] ------------[ cut here ]------------
[ 40.996461] WARNING: CPU: 3 PID: 53 at kernel/softirq.c:150 __local_bh_enable_ip+0x88/0xd0()
[ 40.996461] Modules linked in: dm_crypt loop rpcsec_gss_krb5 dm_mod crc32_pclmul crc32c_intel ata_piix aesni_intel aes_i586 lrw ablk_helper cryptd
[ 40.996465] CPU: 3 PID: 53 Comm: kworker/u8:1 Tainted: G D 4.4.0-rc5+ #44
[ 40.996466] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 40.996469] 00000000 00000000 f489fc64 c12a98f2 00000000 f489fc7c c1042757 c10455a8
[ 40.996471] 00000201 c10bf91e f489c0c0 f489fc8c c10427ff 00000009 00000000 f489fc9c
[ 40.996473] c10455a8 c16d07e0 c16d0660 f489fca8 c14e49ca f489c0c0 f489fcbc c10bf91e
[ 40.996475] Call Trace:
[ 40.996477] [<c12a98f2>] dump_stack+0x4b/0x79
[ 40.996479] [<c1042757>] warn_slowpath_common+0x67/0xa0
[ 40.996480] [<c10455a8>] ? __local_bh_enable_ip+0x88/0xd0
[ 40.996482] [<c10bf91e>] ? cgroup_exit+0x4e/0xc0
[ 40.996484] [<c10427ff>] warn_slowpath_null+0xf/0x20
[ 40.996486] [<c10455a8>] __local_bh_enable_ip+0x88/0xd0
[ 40.996488] [<c14e49ca>] _raw_spin_unlock_bh+0x2a/0x30
[ 40.996490] [<c10bf91e>] cgroup_exit+0x4e/0xc0
[ 40.996491] [<c1043674>] do_exit+0x224/0x920
[ 40.996494] [<c1092065>] ? kmsg_dump+0x105/0x180
[ 40.996496] [<c1004f21>] oops_end+0x61/0x90
[ 40.996498] [<c1038965>] no_context+0xf5/0x210
[ 40.996500] [<c1038b1c>] __bad_area_nosemaphore+0x9c/0x150
[ 40.996501] [<c1038bdd>] bad_area_nosemaphore+0xd/0x10
[ 40.996502] [<c1038e0f>] __do_page_fault+0x6f/0x4a0
[ 40.996504] [<c1064022>] ? try_to_wake_up+0x182/0x340
[ 40.996505] [<c1039240>] ? __do_page_fault+0x4a0/0x4a0
[ 40.996507] [<c103924b>] do_page_fault+0xb/0x10
[ 40.996508] [<c14e601f>] error_code+0x5f/0x64
[ 40.996509] [<c1039240>] ? __do_page_fault+0x4a0/0x4a0
[ 40.996510] [<f8710d26>] ? crypt_sg_entry+0x186/0x270 [dm_crypt]
[ 40.996511] [<f8710e8a>] crypt_convert_io+0x7a/0x360 [dm_crypt]
[ 40.996512] [<f87131e5>] kcryptd_crypt+0x395/0x3da [dm_crypt]
[ 40.996514] [<c1056e23>] process_one_work+0x153/0x420
[ 40.996515] [<c1056dd0>] ? process_one_work+0x100/0x420
[ 40.996516] [<c1057127>] worker_thread+0x37/0x470
[ 40.996517] [<c10570f0>] ? process_one_work+0x420/0x420
[ 40.996518] [<c105c326>] kthread+0x96/0xb0
[ 40.996519] [<c14e5389>] ret_from_kernel_thread+0x21/0x38
[ 40.996520] [<c105c290>] ? kthread_worker_fn+0xf0/0xf0
[ 40.996521] ---[ end trace d78b89aae913dc21 ]---
[ 40.996547] BUG: unable to handle kernel paging request at ffffffc8
[ 40.996548] IP: [<c105c75a>] kthread_data+0xa/0x10
[ 40.996551] *pde = 018c3067 *pte = 00000000
[ 40.996552] Oops: 0000 [#3] PREEMPT SMP
[ 40.996554] Modules linked in: dm_crypt loop rpcsec_gss_krb5 dm_mod crc32_pclmul crc32c_intel ata_piix aesni_intel aes_i586 lrw ablk_helper cryptd
[ 40.996560] CPU: 3 PID: 53 Comm: kworker/u8:1 Tainted: G D W 4.4.0-rc5+ #44
[ 40.996560] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 40.996564] task: f489c0c0 ti: f489e000 task.ti: f489e000
[ 40.996565] EIP: 0060:[<c105c75a>] EFLAGS: 00010002 CPU: 3
[ 40.996566] EIP is at kthread_data+0xa/0x10
[ 40.996567] EAX: 00000000 EBX: 00000003 ECX: 18a6743d EDX: 00000003
[ 40.996567] ESI: f489c0c0 EDI: c18b6e00 EBP: f489fc80 ESP: f489fc78
[ 40.996568] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 40.996568] CR0: 8005003b CR2: 00000014 CR3: 33c26000 CR4: 001406d0
[ 40.996594] Stack:
[ 40.996595] c1057e5b f489c478 f489fcb0 c14e0083 00000003 f5fb6e10 f5fb6e00 c129283a
[ 40.996597] 00000000 f5fb6e00 f489c0c0 f48a0000 f489f9b8 f489fce0 f489fcbc c14e0612
[ 40.996598] f489c0c0 f489fcf4 c1043a2e f489c3cc f57e8040 00000001 00000002 f489c3cc
[ 40.996600] Call Trace:
[ 40.996602] [<c1057e5b>] ? wq_worker_sleeping+0xb/0x90
[ 40.996603] [<c14e0083>] __schedule+0x6a3/0xad0
[ 40.996605] [<c129283a>] ? put_io_context_active+0xaa/0xd0
[ 40.996607] [<c14e0612>] schedule+0x32/0x80
[ 40.996609] [<c1043a2e>] do_exit+0x5de/0x920
[ 40.996610] [<c1004f21>] oops_end+0x61/0x90
[ 40.996612] [<c1038965>] no_context+0xf5/0x210
[ 40.996614] [<c1038b1c>] __bad_area_nosemaphore+0x9c/0x150
[ 40.996616] [<c1038bdd>] bad_area_nosemaphore+0xd/0x10
[ 40.996617] [<c1038e0f>] __do_page_fault+0x6f/0x4a0
[ 40.996619] [<c1064022>] ? try_to_wake_up+0x182/0x340
[ 40.996621] [<c1039240>] ? __do_page_fault+0x4a0/0x4a0
[ 40.996622] [<c103924b>] do_page_fault+0xb/0x10
[ 40.996623] [<c14e601f>] error_code+0x5f/0x64
[ 40.996625] [<c1039240>] ? __do_page_fault+0x4a0/0x4a0
[ 40.996627] [<f8710d26>] ? crypt_sg_entry+0x186/0x270 [dm_crypt]
[ 40.996629] [<f8710e8a>] crypt_convert_io+0x7a/0x360 [dm_crypt]
[ 40.996630] [<f87131e5>] kcryptd_crypt+0x395/0x3da [dm_crypt]
[ 40.996631] [<c1056e23>] process_one_work+0x153/0x420
[ 40.996632] [<c1056dd0>] ? process_one_work+0x100/0x420
[ 40.996633] [<c1057127>] worker_thread+0x37/0x470
[ 40.996634] [<c10570f0>] ? process_one_work+0x420/0x420
[ 40.996635] [<c105c326>] kthread+0x96/0xb0
[ 40.996636] [<c14e5389>] ret_from_kernel_thread+0x21/0x38
[ 40.996637] [<c105c290>] ? kthread_worker_fn+0xf0/0xf0
[ 40.996638] Code: 00 3b 5f 34 74 0f 89 f8 e8 04 83 48 00 83 c4 78 5b 5e 5f 5d c3 8b 4f 28 eb bf 8d b4 26 00 00 00 00 55 8b 80 64 03 00 00 89 e5 5d <8b> 40 c8 c3 66 90 55 b9 04 00 00 00 89 e5 83 ec 04 8b 90 64 03
[ 40.996652] EIP: [<c105c75a>] kthread_data+0xa/0x10 SS:ESP 0068:f489fc78
[ 40.996654] CR2: 00000000ffffffc8
[ 40.996655] ---[ end trace d78b89aae913dc22 ]---
[ 40.996655] Fixing recursive fault but reboot is needed!
[ 40.996656] BUG: scheduling while atomic: kworker/u8:1/53/0x00000003
[ 40.996657] INFO: lockdep is turned off.
[ 40.996657] Modules linked in: dm_crypt loop rpcsec_gss_krb5 dm_mod crc32_pclmul crc32c_intel ata_piix aesni_intel aes_i586 lrw ablk_helper cryptd
[ 40.996660] irq event stamp: 11388
[ 40.996661] hardirqs last enabled at (11387): [<c14e4a62>] _raw_spin_unlock_irq+0x22/0x50
[ 40.996662] hardirqs last disabled at (11388): [<c14e489d>] _raw_spin_lock_irq+0xd/0x60
[ 40.996664] softirqs last enabled at (11314): [<c10fcddc>] wb_wakeup_delayed+0x4c/0x60
[ 40.996666] softirqs last disabled at (11310): [<c10fcdb6>] wb_wakeup_delayed+0x26/0x60
[ 40.996667] Preemption disabled at:[<c1004f21>] oops_end+0x61/0x90
[ 40.996668]
[ 40.996669] CPU: 3 PID: 53 Comm: kworker/u8:1 Tainted: G D W 4.4.0-rc5+ #44
[ 40.996670] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 40.996674] 00000000 00000000 f489fb00 c12a98f2 f489c0c0 f489fb0c c106059f f48a0000
[ 40.996677] f489fb3c c14e0168 00000003 00000009 f5fb6e00 f489fb40 00000000 f5fb6e00
[ 40.996680] f489c0c0 f48a0000 00000009 f489c0c0 f489fb48 c14e0612 f489c0c0 f489fb84
[ 40.996683] Call Trace:
[ 40.996685] [<c12a98f2>] dump_stack+0x4b/0x79
[ 40.996687] [<c106059f>] __schedule_bug+0x5f/0xb0
[ 40.996688] [<c14e0168>] __schedule+0x788/0xad0
[ 40.996690] [<c14e0612>] schedule+0x32/0x80
[ 40.996691] [<c1043b7b>] do_exit+0x72b/0x920
[ 40.996692] [<c1092065>] ? kmsg_dump+0x105/0x180
[ 40.996693] [<c1004f21>] oops_end+0x61/0x90
[ 40.996694] [<c1038965>] no_context+0xf5/0x210
[ 40.996695] [<c1038b1c>] __bad_area_nosemaphore+0x9c/0x150
[ 40.996697] [<c106a54a>] ? update_curr+0x9a/0x130
[ 40.996698] [<c1039240>] ? __do_page_fault+0x4a0/0x4a0
[ 40.996699] [<c1038bdd>] bad_area_nosemaphore+0xd/0x10
[ 40.996700] [<c1038e0f>] __do_page_fault+0x6f/0x4a0
[ 40.996701] [<c1039240>] ? __do_page_fault+0x4a0/0x4a0
[ 40.996702] [<c103924b>] do_page_fault+0xb/0x10
[ 40.996703] [<c14e601f>] error_code+0x5f/0x64
[ 40.996704] [<c106007b>] ? ttwu_stat+0x5b/0x200
[ 40.996705] [<c1039240>] ? __do_page_fault+0x4a0/0x4a0
[ 40.996706] [<c105c75a>] ? kthread_data+0xa/0x10
[ 40.996707] [<c1057e5b>] ? wq_worker_sleeping+0xb/0x90
[ 40.996708] [<c14e0083>] __schedule+0x6a3/0xad0
[ 40.996709] [<c129283a>] ? put_io_context_active+0xaa/0xd0
[ 40.996710] [<c14e0612>] schedule+0x32/0x80
[ 40.996711] [<c1043a2e>] do_exit+0x5de/0x920
[ 40.996712] [<c1004f21>] oops_end+0x61/0x90
[ 40.996713] [<c1038965>] no_context+0xf5/0x210
[ 40.996715] [<c1038b1c>] __bad_area_nosemaphore+0x9c/0x150
[ 40.996716] [<c1038bdd>] bad_area_nosemaphore+0xd/0x10
[ 40.996717] [<c1038e0f>] __do_page_fault+0x6f/0x4a0
[ 40.996718] [<c1064022>] ? try_to_wake_up+0x182/0x340
[ 40.996719] [<c1039240>] ? __do_page_fault+0x4a0/0x4a0
[ 40.996720] [<c103924b>] do_page_fault+0xb/0x10
[ 40.996721] [<c14e601f>] error_code+0x5f/0x64
[ 40.996722] [<c1039240>] ? __do_page_fault+0x4a0/0x4a0
[ 40.996723] [<f8710d26>] ? crypt_sg_entry+0x186/0x270 [dm_crypt]
[ 40.996724] [<f8710e8a>] crypt_convert_io+0x7a/0x360 [dm_crypt]
[ 40.996726] [<f87131e5>] kcryptd_crypt+0x395/0x3da [dm_crypt]
[ 40.996727] [<c1056e23>] process_one_work+0x153/0x420
[ 40.996728] [<c1056dd0>] ? process_one_work+0x100/0x420
[ 40.996729] [<c1057127>] worker_thread+0x37/0x470
[ 40.996730] [<c10570f0>] ? process_one_work+0x420/0x420
[ 40.996731] [<c105c326>] kthread+0x96/0xb0
[ 40.996733] [<c14e5389>] ret_from_kernel_thread+0x21/0x38
[ 40.996735] [<c105c290>] ? kthread_worker_fn+0xf0/0xf0
[ 41.023333] crc32c_intel ata_piix aesni_intel aes_i586 lrw ablk_helper cryptd
[ 41.023559] CPU: 2 PID: 6 Comm: kworker/u8:0 Tainted: G D W 4.4.0-rc5+ #44
[ 41.023649] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 41.023757] 00000000 00000000 f4c07c64 c12a98f2 00000000 f4c07c7c c1042757 c10455a8
[ 41.023963] 00000201 c10bf91e f4c04180 f4c07c8c c10427ff 00000009 00000000 f4c07c9c
[ 41.024168] c10455a8 c16d07e0 c16d0660 f4c07ca8 c14e49ca f4c04180 f4c07cbc c10bf91e
[ 41.024373] Call Trace:
[ 41.024421] [<c12a98f2>] dump_stack+0x4b/0x79
[ 41.024477] [<c1042757>] warn_slowpath_common+0x67/0xa0
[ 41.024537] [<c10455a8>] ? __local_bh_enable_ip+0x88/0xd0
[ 41.024599] [<c10bf91e>] ? cgroup_exit+0x4e/0xc0
[ 41.024655] [<c10427ff>] warn_slowpath_null+0xf/0x20
[ 41.024714] [<c10455a8>] __local_bh_enable_ip+0x88/0xd0
[ 41.024775] [<c14e49ca>] _raw_spin_unlock_bh+0x2a/0x30
[ 41.024834] [<c10bf91e>] cgroup_exit+0x4e/0xc0
[ 41.024890] [<c1043674>] do_exit+0x224/0x920
[ 41.024945] [<c1092065>] ? kmsg_dump+0x105/0x180
[ 41.025002] [<c1004f21>] oops_end+0x61/0x90
[ 41.025057] [<c1038965>] no_context+0xf5/0x210
[ 41.025113] [<c1038b1c>] __bad_area_nosemaphore+0x9c/0x150
[ 41.025176] [<c10b5f0b>] ? __module_text_address+0xb/0x60
[ 41.025236] [<c1038bdd>] bad_area_nosemaphore+0xd/0x10
[ 41.025295] [<c1038e0f>] __do_page_fault+0x6f/0x4a0
[ 41.025353] [<c1004d0e>] ? print_context_stack+0x4e/0xb0
[ 41.025412] [<c1039240>] ? __do_page_fault+0x4a0/0x4a0
[ 41.025471] [<c103924b>] do_page_fault+0xb/0x10
[ 41.025527] [<c14e601f>] error_code+0x5f/0x64
[ 41.025582] [<c1039240>] ? __do_page_fault+0x4a0/0x4a0
[ 41.025642] [<f8710d26>] ? crypt_sg_entry+0x186/0x270 [dm_crypt]
[ 41.025705] [<f8710e8a>] crypt_convert_io+0x7a/0x360 [dm_crypt]
[ 41.025768] [<f87131e5>] kcryptd_crypt+0x395/0x3da [dm_crypt]
[ 41.025831] [<c1056e23>] process_one_work+0x153/0x420
[ 41.026756] [<c1056dd0>] ? process_one_work+0x100/0x420
[ 41.026816] [<c1057127>] worker_thread+0x37/0x470
[ 41.026873] [<c10570f0>] ? process_one_work+0x420/0x420
[ 41.026932] [<c105c326>] kthread+0x96/0xb0
[ 41.026987] [<c14e5389>] ret_from_kernel_thread+0x21/0x38
[ 41.027047] [<c105c290>] ? kthread_worker_fn+0xf0/0xf0
[ 41.027106] ---[ end trace d78b89aae913dc23 ]---
[ 41.027229] BUG: unable to handle kernel paging request at ffffffc8
[ 41.027349] IP: [<c105c75a>] kthread_data+0xa/0x10
[ 41.027455] *pde = 018c3067 *pte = 00000000
[ 41.027568] Oops: 0000 [#4] PREEMPT SMP
[ 41.027755] Modules linked in: dm_crypt loop rpcsec_gss_krb5 dm_mod crc32_pclmul crc32c_intel ata_piix aesni_intel aes_i586 lrw ablk_helper cryptd
[ 41.029586] CPU: 2 PID: 6 Comm: kworker/u8:0 Tainted: G D W 4.4.0-rc5+ #44
[ 41.029826] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 41.030943] task: f4c04180 ti: f4c06000 task.ti: f4c06000
[ 41.031137] EIP: 0060:[<c105c75a>] EFLAGS: 00010002 CPU: 2
[ 41.031341] EIP is at kthread_data+0xa/0x10
[ 41.031536] EAX: 00000000 EBX: 00000002 ECX: 18c2e78b EDX: 00000002
[ 41.031687] ESI: f4c04180 EDI: c18b6e00 EBP: f4c07c80 ESP: f4c07c78
[ 41.031802] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 41.031955] CR0: 8005003b CR2: 00000014 CR3: 018c1000 CR4: 001406d0
[ 41.032207] Stack:
[ 41.032410] c1057e5b f4c04538 f4c07cb0 c14e0083 00000002 f5e65e10 f5e65e00 c129283a
[ 41.032772] 00000000 f5e65e00 f4c04180 f4c08000 f4c079b8 f4c07ce0 f4c07cbc c14e0612
[ 41.035807] f4c04180 f4c07cf4 c1043a2e f4c0448c f57e8040 00000001 00000002 f4c0448c
[ 41.037146] Call Trace:
[ 41.037353] [<c1057e5b>] ? wq_worker_sleeping+0xb/0x90
[ 41.037556] [<c14e0083>] __schedule+0x6a3/0xad0
[ 41.037759] [<c129283a>] ? put_io_context_active+0xaa/0xd0
[ 41.038744] [<c14e0612>] schedule+0x32/0x80
[ 41.038883] [<c1043a2e>] do_exit+0x5de/0x920
[ 41.039067] [<c1004f21>] oops_end+0x61/0x90
[ 41.039263] [<c1038965>] no_context+0xf5/0x210
[ 41.039455] [<c1038b1c>] __bad_area_nosemaphore+0x9c/0x150
[ 41.039655] [<c10b5f0b>] ? __module_text_address+0xb/0x60
[ 41.039850] [<c1038bdd>] bad_area_nosemaphore+0xd/0x10
[ 41.040025] [<c1038e0f>] __do_page_fault+0x6f/0x4a0
[ 41.040222] [<c1004d0e>] ? print_context_stack+0x4e/0xb0
[ 41.040373] [<c1039240>] ? __do_page_fault+0x4a0/0x4a0
[ 41.040543] [<c103924b>] do_page_fault+0xb/0x10
[ 41.040765] [<c14e601f>] error_code+0x5f/0x64
[ 41.040984] [<c1039240>] ? __do_page_fault+0x4a0/0x4a0
[ 41.041210] [<f8710d26>] ? crypt_sg_entry+0x186/0x270 [dm_crypt]
[ 41.041435] [<f8710e8a>] crypt_convert_io+0x7a/0x360 [dm_crypt]
[ 41.041650] [<f87131e5>] kcryptd_crypt+0x395/0x3da [dm_crypt]
[ 41.042746] [<c1056e23>] process_one_work+0x153/0x420
[ 41.042928] [<c1056dd0>] ? process_one_work+0x100/0x420
[ 41.043123] [<c1057127>] worker_thread+0x37/0x470
[ 41.043337] [<c10570f0>] ? process_one_work+0x420/0x420
[ 41.043450] [<c105c326>] kthread+0x96/0xb0
[ 41.043529] [<c14e5389>] ret_from_kernel_thread+0x21/0x38
[ 41.043653] [<c105c290>] ? kthread_worker_fn+0xf0/0xf0
[ 41.043831] Code: 00 3b 5f 34 74 0f 89 f8 e8 04 83 48 00 83 c4 78 5b 5e 5f 5d c3 8b 4f 28 eb bf 8d b4 26 00 00 00 00 55 8b 80 64 03 00 00 89 e5 5d <8b> 40 c8 c3 66 90 55 b9 04 00 00 00 89 e5 83 ec 04 8b 90 64 03
[ 41.055486] EIP: [<c105c75a>] kthread_data+0xa/0x10 SS:ESP 0068:f4c07c78
[ 41.055692] CR2: 00000000ffffffc8
[ 41.055803] ---[ end trace d78b89aae913dc24 ]---
[ 41.055917] Fixing recursive fault but reboot is needed!
[ 41.056038] BUG: scheduling while atomic: kworker/u8:0/6/0x00000003
[ 41.056162] INFO: lockdep is turned off.
[ 41.056353] Modules linked in: dm_crypt loop rpcsec_gss_krb5 dm_mod crc32_pclmul crc32c_intel ata_piix aesni_intel aes_i586 lrw ablk_helper cryptd
[ 41.056783] irq event stamp: 17002
[ 41.056833] hardirqs last enabled at (17001): [<c108d686>] __raw_spin_lock_init+0x16/0x50
[ 41.056944] hardirqs last disabled at (17002): [<c14e601b>] error_code+0x5b/0x64
[ 41.057103] softirqs last enabled at (16962): [<c10bf868>] cgroup_post_fork+0x68/0xd0
[ 41.057335] softirqs last disabled at (16960): [<c10bf822>] cgroup_post_fork+0x22/0xd0
[ 41.057522] Preemption disabled at:[<c1004f21>] oops_end+0x61/0x90
[ 41.057719]
[ 41.057819] CPU: 2 PID: 6 Comm: kworker/u8:0 Tainted: G D W 4.4.0-rc5+ #44
[ 41.058887] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 41.059066] 00000000 00000000 f4c07b00 c12a98f2 f4c04180 f4c07b0c c106059f f4c08000
[ 41.059774] f4c07b3c c14e0168 00000002 00000009 f5e65e00 f4c07b40 00000000 f5e65e00
[ 41.060519] f4c04180 f4c08000 00000009 f4c04180 f4c07b48 c14e0612 f4c04180 f4c07b84
[ 41.060728] Call Trace:
[ 41.060776] [<c12a98f2>] dump_stack+0x4b/0x79
[ 41.060833] [<c106059f>] __schedule_bug+0x5f/0xb0
[ 41.060891] [<c14e0168>] __schedule+0x788/0xad0
[ 41.060979] [<c14e0612>] schedule+0x32/0x80
[ 41.061067] [<c1043b7b>] do_exit+0x72b/0x920
[ 41.061148] [<c1092065>] ? kmsg_dump+0x105/0x180
[ 41.061250] [<c1004f21>] oops_end+0x61/0x90
[ 41.061306] [<c1038965>] no_context+0xf5/0x210
[ 41.061362] [<c1038b1c>] __bad_area_nosemaphore+0x9c/0x150
[ 41.061425] [<c106a54a>] ? update_curr+0x9a/0x130
[ 41.061482] [<c1039240>] ? __do_page_fault+0x4a0/0x4a0
[ 41.061542] [<c1038bdd>] bad_area_nosemaphore+0xd/0x10
[ 41.061602] [<c1038e0f>] __do_page_fault+0x6f/0x4a0
[ 41.061661] [<c1039240>] ? __do_page_fault+0x4a0/0x4a0
[ 41.061720] [<c103924b>] do_page_fault+0xb/0x10
[ 41.061789] [<c14e601f>] error_code+0x5f/0x64
[ 41.062866] [<c106007b>] ? ttwu_stat+0x5b/0x200
[ 41.063053] [<c1039240>] ? __do_page_fault+0x4a0/0x4a0
[ 41.063247] [<c105c75a>] ? kthread_data+0xa/0x10
[ 41.063434] [<c1057e5b>] ? wq_worker_sleeping+0xb/0x90
[ 41.063625] [<c14e0083>] __schedule+0x6a3/0xad0
[ 41.063818] [<c129283a>] ? put_io_context_active+0xaa/0xd0
[ 41.064043] [<c14e0612>] schedule+0x32/0x80
[ 41.064762] [<c1043a2e>] do_exit+0x5de/0x920
[ 41.064944] [<c1004f21>] oops_end+0x61/0x90
[ 41.065133] [<c1038965>] no_context+0xf5/0x210
[ 41.065313] [<c1038b1c>] __bad_area_nosemaphore+0x9c/0x150
[ 41.065505] [<c10b5f0b>] ? __module_text_address+0xb/0x60
[ 41.065692] [<c1038bdd>] bad_area_nosemaphore+0xd/0x10
[ 41.066731] [<c1038e0f>] __do_page_fault+0x6f/0x4a0
[ 41.066848] [<c1004d0e>] ? print_context_stack+0x4e/0xb0
[ 41.067012] [<c1039240>] ? __do_page_fault+0x4a0/0x4a0
[ 41.067231] [<c103924b>] do_page_fault+0xb/0x10
[ 41.067500] [<c14e601f>] error_code+0x5f/0x64
[ 41.067689] [<c1039240>] ? __do_page_fault+0x4a0/0x4a0
[ 41.067881] [<f8710d26>] ? crypt_sg_entry+0x186/0x270 [dm_crypt]
[ 41.068069] [<f8710e8a>] crypt_convert_io+0x7a/0x360 [dm_crypt]
[ 41.068259] [<f87131e5>] kcryptd_crypt+0x395/0x3da [dm_crypt]
[ 41.068417] [<c1056e23>] process_one_work+0x153/0x420
[ 41.068534] [<c1056dd0>] ? process_one_work+0x100/0x420
[ 41.068709] [<c1057127>] worker_thread+0x37/0x470
[ 41.068917] [<c10570f0>] ? process_one_work+0x420/0x420
[ 41.069118] [<c105c326>] kthread+0x96/0xb0
[ 41.069307] [<c14e5389>] ret_from_kernel_thread+0x21/0x38
[ 41.069434] [<c105c290>] ? kthread_worker_fn+0xf0/0xf0
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