Generate Blob Under Linux

sankarsalla — Thu, 04 Oct 2018 12:54:51 GMT

Hi All,

We are trying to generate blob under linux,we are using linux-4.9.15.

We got some link in nxp forum Generate Blob Under Linux

We followed the step based on the pdf.

Driver compiled successfully and node also created in dev like /dev/kb.

once we are trying to run application kernel panic happens.

please find below log.

./kb_test encap key.file blob.file

encap test

key:
31 31 31 31 32 32 32 32 33 33 33 33 34 34 34 34 35 35 35 35 36 36 36 36 37 37 37 37 38 38
38 38
Unable to handle kernel paging request at virtual address a0049aa0
pgd = 9ce4c000
[a0049aa0] *pgd=00000000
Internal error: Oops: 5 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 0 PID: 273 Comm: kb_test Not tainted 4.9.51-gfa28e9f-dirty #6
Hardware name: Freescale i.MX6 UltraLite (Device Tree)
task: 9c58f180 task.stack: 9ce6e000
PC is at dma_cache_maint_page+0x44/0x120
LR is at __dma_page_cpu_to_dev+0x24/0x88
pc : [<801133a0>] lr : [<801134a0>] psr: 60080013
sp : 9ce6fdd8 ip : 80f062c4 fp : 80fdf800
r10: 80f030d4 r9 : 80116e4c r8 : 00000002
r7 : 00022955 r6 : 000a2955 r5 : 00000008 r4 : 00000000
r3 : 9fbf7000 r2 : 00000008 r1 : 00080000 r0 : 00452aa0
Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
Control: 10c53c7d Table: 9ce4c06a DAC: 00000051
Process kb_test (pid: 273, stack limit = 0x9ce6e210)
Stack: (0x9ce6fdd8 to 0x9ce70000)
fdc0: 0009ccb0 8016c5d0
fde0: 9ccb0c00 00000000 a0049aa0 00000002 00000008 00000020 a2955000 00101000
fe00: 00000000 801134a0 80116e4c 801b32dc 00000000 9c51c410 00000000 a0049aa0
fe20: 00000050 801135a8 9c51c410 9ccb0c00 80fdf800 807693b0 00000002 00000000
fe40: 00000000 00006587 9fbeeaa4 80cc775c 9c03715c 9c03715c 7ece3c54 809b0e40
fe60: 00003701 809aa10c 9c3b6c00 9c3b6c00 00000000 00000001 7ece3c54 809b0b3c
fe80: 31313131 9c51c410 00000020 00000000 80ffa2e4 00000003 9ce6e000 00000000
fea0: 7ece3c54 80769b28 00000000 a2955000 00000020 80f75300 9c52c030 00000000
fec0: 00000003 9ce6fed8 00000051 00000000 c0084b00 80769e10 00000020 00000050
fee0: 9c883a80 7ece3c3c 9c52c030 80209fe4 7ece3c54 801f9730 9ce6ffb0 10c53c7d
ff00: 00000000 76fa9000 7ece3c54 80101364 00000000 00000001 00000000 00000001
ff20: 9cca3848 000003eb 00000000 00000000 80f033f4 9cca3840 00000000 9c31c030
ff40: 00000061 00000002 00000000 9cca3848 7ece3c54 801fa914 00000000 00000000
ff60: 00000001 9cca3840 9cca3840 9c883a80 9c883a80 7ece3c3c c0084b00 00000003
ff80: 9ce6e000 00000000 7ece3c54 8020a8f4 00008e4c 00000000 00008570 00000036
ffa0: 80107884 801076c0 00008e4c 00000000 00000003 c0084b00 7ece3c3c 7ece3c3c
ffc0: 00008e4c 00000000 00008570 00000036 00000000 00000000 76fa9000 7ece3c54
ffe0: 00011124 7ece3c2c 0000884c 76f054dc 60080010 00000003 00882014 82e826c6
[<801133a0>] (dma_cache_maint_page) from [<801134a0>] (__dma_page_cpu_to_dev+0x24/0x88)
[<801134a0>] (__dma_page_cpu_to_dev) from [<801135a8>] (arm_dma_map_page+0x5c/0x68)
[<801135a8>] (arm_dma_map_page) from [<807693b0>] (sm_keystore_slot_export+0x184/0x3b0)
[<807693b0>] (sm_keystore_slot_export) from [<80769b28>] (kb_encap+0xc4/0x114)
[<80769b28>] (kb_encap) from [<80769e10>] (kb_ioctl+0x17c/0x1a8)
[<80769e10>] (kb_ioctl) from [<80209fe4>] (do_vfs_ioctl+0x8c/0x964)
[<80209fe4>] (do_vfs_ioctl) from [<8020a8f4>] (SyS_ioctl+0x38/0x54)
[<8020a8f4>] (SyS_ioctl) from [<801076c0>] (ret_fast_syscall+0x0/0x3c)
Code: e59fa0e0 e1a04a24 e08162c0 e0677006 (e7932287)
---[ end trace 4869da3a824a82bf ]---
Segmentation fault

Can you please help us to solve this kernel panic.

Thanks & Regards,

Sankar.

Re: Generate Blob Under Linux

Yuri — Fri, 19 Oct 2018 09:42:37 GMT

Hello,

Can You try using the blob with originally used linux-4.1.15 ?

Regards,

Yuri.

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