Segmentation fault when read /3/0/6

[ieei0214]

Always crash in coap_serialize_message().

Starting program: /data/lwm2m/wakaama/build_client/lwm2mclient -h "leshan.eclipse.org" -p "5683" -4
Trying to bind LWM2M Client to port 56830
LWM2M Client "testlwm2mclient" started on port 56830

Opening connection to server at leshan.eclipse.org:5683
Sending 153 bytes to [5.39.83.206]:5683
44 02 49 11 11 49 10 87 B2 72 64 11 28 3D 05 65 D.I..I...rd.(=.e
70 3D 74 65 73 74 6C 77 6D 32 6D 63 6C 69 65 6E p=testlwm2mclien
74 03 62 3D 55 06 6C 74 3D 33 30 30 FF 3C 2F 3E t.b=U.lt=300.</>
3B 72 74 3D 22 6F 6D 61 2E 6C 77 6D 32 6D 22 3B ;rt="oma.lwm2m";
63 74 3D 31 35 34 33 2C 3C 2F 31 2F 30 3E 2C 3C ct=1543,</1/0>,<
2F 33 2F 30 3E 2C 3C 2F 35 2F 30 3E 2C 3C 2F 36 /3/0>,</5/0>,</6
2F 30 3E 2C 3C 2F 31 30 32 34 2F 31 30 3E 2C 3C /0>,</1024/10>,<
2F 31 30 32 34 2F 31 31 3E 2C 3C 2F 31 30 32 34 /1024/11>,</1024
2F 31 32 3E 2C 3C 2F 34 2F 30 3E 2C 3C 2F 37 2F /12>,</4/0>,</7/
30 3E 2C 3C 2F 32 2F 30 3E 0>,</2/0>
22 bytes received from [5.39.83.206]:5683
64 41 49 11 11 49 10 87 82 72 64 0A 38 73 78 79 dAI..I...rd.8sxy
44 7A 6A 62 67 76 Dzjbgv
15 bytes received from [5.39.83.206]:5683
45 01 4D 06 7D 2F F7 C6 E1 B1 33 01 30 01 36 E.M.}/....3.0.6

Program received signal SIGSEGV, Segmentation fault.
__memmove_ssse3_back () at ../sysdeps/x86_64/multiarch/memcpy-ssse3-back.S:131
131 ../sysdeps/x86_64/multiarch/memcpy-ssse3-back.S: No such file or directory.
(gdb) bt
#0 __memmove_ssse3_back () at ../sysdeps/x86_64/multiarch/memcpy-ssse3-back.S:131
#1 0x000000000041d31e in coap_serialize_message ()
#2 0x0000000000414032 in message_send ()
#3 0x0000000000413e02 in lwm2m_handle_packet ()
#4 0x0000000000406618 in main ()

(gdb)

[dnav]

This is a bug I (partially) fixed in branch lwm2m_data_rework.
The serialization fails and returns -1. But the object_read() function treats the result as a size_t and does not detect the failure, putting a NULL pointer as the payload with a very long length.
Serialization fails because we try to serialize a multiple resource in text format. I'm working on this.

[dnav]

fixed by #130