Serial Port program error !!!

Serial Port program error !!! -- Linux general technology-Linux programming and kernel information. The following is a detailed description. Compiled a serial reading program

Read 128 bytes each time, but read them cyclically for about 10 times.

The following information is displayed and then automatically exits.

Let's take a look.

I searched the internet for similar errors, but it seems that there is no complete solution.

[/Code]
/*************************************** *******************/
Not Ack
Internal error: Oops: 0
CPU: 0
Pc :[ ] Lr :[ ] Not tainted
Sp: c2569f04 ip Address: 20000013 fp: 00000001
R10: bffffa10 r9: 7 fffffff r8: c252e114
R7: c252e000 r6: c2569f24 r5: c01eb26c r4: c252e000
R3: 00000110 r2: 00000401 r1: e400a08c r0: 40000013
IRQs off FIQs on Mode SVC_32 Segment user
Control: 5317F Table: C2E20000 DAC: 00000015
Process ttytest (pid: 56, stackpage = c2569000)
Stack: (0xc2569ef4 to 0xc256a000)
40000093 U
00000000 U
00000000 U
C251_a0 U
00000000 U
00008db8 U
Bffffa10 U
201786ec U
00000004 U
Invalid frame pointer 0x00000001U
(E7913602) U
Segmentation fault

[/Code]

[ This post was last edited by rambo0808]