UB sanitizer reports NULL pointer access via SymCryptEcurveAllocate #10
Description
#include <symcrypt.h>
#include <stdlib.h>
void SymCryptFatal(UINT32 fatalCode) {
(void)fatalCode;
abort();
}
void SymCryptInjectError( PBYTE pbData, SIZE_T cbData ) {
(void)pbData;
(void)cbData;
}
PVOID SymCryptCallbackAlloc( SIZE_T nBytes ) {
return malloc(nBytes);
}
VOID SymCryptCallbackFree( VOID * pMem ) {
free(pMem);
}
SYMCRYPT_ERROR SymCryptCallbackRandom(PBYTE pbBuffer, SIZE_T cbBuffer ) {
abort();
}
SYMCRYPT_CPU_FEATURES
SymCryptCpuFeaturesNeverPresent(void) {
return 0;
}
int main(void)
{
SYMCRYPT_ECURVE* curve = SymCryptEcurveAllocate(SymCryptEcurveParamsNumsP512t1, 0);
return 0;
}If compiled with UndefinedBehaviorSanitizer (clang with -fsanitize=undefined, on Linux 64 bit), execution of this program will print:
/mnt/2tb/sym-crash/SymCrypt/lib/fdef_mod.c:53:12: runtime error: member access within null pointer of type 'SYMCRYPT_MODULUS' (aka 'struct _SYMCRYPT_MODULUS')
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /mnt/2tb/sym-crash/SymCrypt/lib/fdef_mod.c:53:12 in
/mnt/2tb/sym-crash/SymCrypt/lib/fdef_general.c:819:12: runtime error: member access within null pointer of type 'SYMCRYPT_DIVISOR' (aka 'struct _SYMCRYPT_DIVISOR')
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /mnt/2tb/sym-crash/SymCrypt/lib/fdef_general.c:819:12 in
/mnt/2tb/sym-crash/SymCrypt/lib/fdef_general.c:195:12: runtime error: member access within null pointer of type 'SYMCRYPT_INT' (aka 'struct _SYMCRYPT_INT')
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /mnt/2tb/sym-crash/SymCrypt/lib/fdef_general.c:195:12 in
/mnt/2tb/sym-crash/SymCrypt/lib/fdef_mod.c:66:27: runtime error: member access within null pointer of type 'SYMCRYPT_MODULUS' (aka 'struct _SYMCRYPT_MODULUS')
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /mnt/2tb/sym-crash/SymCrypt/lib/fdef_mod.c:66:27 in
/mnt/2tb/sym-crash/SymCrypt/lib/fdef_general.c:850:55: runtime error: member access within null pointer of type 'SYMCRYPT_DIVISOR' (aka 'struct _SYMCRYPT_DIVISOR')
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /mnt/2tb/sym-crash/SymCrypt/lib/fdef_general.c:850:55 in