csn1: Validate recursive array max size during decoding
This way if CSN1 encoded bitstream contains more elements than what the
defintion expects it will fail instead of overflowing the decoded
buffer.
RA cap struct placed in unit test is taken from a real android phone
sending the value when attaching to the network. Then SGSN sends it back
and osmo-pcu would crash similar to unit test:
*** stack smashing detected ***: terminated
Process terminating with default action of signal 6 (SIGABRT): dumping core
at 0x4C62CE5: raise (in /usr/lib/libc-2.31.so)
by 0x4C4C856: abort (in /usr/lib/libc-2.31.so)
by 0x4CA62AF: __libc_message (in /usr/lib/libc-2.31.so)
by 0x4D36069: __fortify_fail (in /usr/lib/libc-2.31.so)
by 0x4D36033: __stack_chk_fail (in /usr/lib/libc-2.31.so)
by 0x124706: testRAcap2(void*) (RLCMACTest.cpp:468)
Related: OS#4463
Change-Id: I9fe0e55e0a6a41ae2cc885fba490c1d4a186231e
diff --git a/src/csn1.h b/src/csn1.h
index b3fdc0a..0421b39 100644
--- a/src/csn1.h
+++ b/src/csn1.h
@@ -443,7 +443,7 @@
* Par4: will hold the number of element in the array after unpacking
*****************************************************************************/
#define M_REC_TARRAY(_STRUCT, _MEMBER, _MEMBER_TYPE, _ElementCountField)\
- {CSN_RECURSIVE_TARRAY, offsetof(_STRUCT, _ElementCountField), {(const void*)CSNDESCR_##_MEMBER_TYPE}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, sizeof(_MEMBER_TYPE), NULL}
+ {CSN_RECURSIVE_TARRAY, offsetof(_STRUCT, _ElementCountField), {(const void*)CSNDESCR_##_MEMBER_TYPE}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, sizeof(_MEMBER_TYPE), (void_fn_t)ElementsOf(((_STRUCT*)0)->_MEMBER)}
/******************************************************************************
* M_REC_TARRAY1(Par1, Par2, Par3, Par4)
@@ -451,7 +451,7 @@
* <list> ::= <type> {1 <type>} ** 0 ;
*****************************************************************************/
#define M_REC_TARRAY_1(_STRUCT, _MEMBER, _MEMBER_TYPE, _ElementCountField)\
- {CSN_RECURSIVE_TARRAY_1, offsetof(_STRUCT, _ElementCountField), {(const void*)CSNDESCR_##_MEMBER_TYPE}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, sizeof(_MEMBER_TYPE), NULL}
+ {CSN_RECURSIVE_TARRAY_1, offsetof(_STRUCT, _ElementCountField), {(const void*)CSNDESCR_##_MEMBER_TYPE}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, sizeof(_MEMBER_TYPE), (void_fn_t)ElementsOf(((_STRUCT*)0)->_MEMBER)}
/******************************************************************************
* M_REC_TARRAY2(Par1, Par2, Par3, Par4)
@@ -459,7 +459,7 @@
* <lists> ::= <type> { 0 <type> } ** 1 ;
*****************************************************************************/
#define M_REC_TARRAY_2(_STRUCT, _MEMBER, _MEMBER_TYPE, _ElementCountField)\
- {CSN_RECURSIVE_TARRAY_2, offsetof(_STRUCT, _ElementCountField), {(const void*)CSNDESCR_##_MEMBER_TYPE}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, sizeof(_MEMBER_TYPE), NULL}
+ {CSN_RECURSIVE_TARRAY_2, offsetof(_STRUCT, _ElementCountField), {(const void*)CSNDESCR_##_MEMBER_TYPE}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, sizeof(_MEMBER_TYPE), (void_fn_t)ElementsOf(((_STRUCT*)0)->_MEMBER)}
/******************************************************************************
* M_TYPE(Par1, Par2, Par3)