There is a data race in blake2-dispatch.c x86/x64 pointer to function CPU dispatching.
Internal calls are made through function pointers to functions that initially point to corresponding dispatch function that detects the CPU features available and updates the corresponding pointer to function.
For example blake2b_init_ptr initially points to blake2b_init_dispatch. The data race is the blake2b_init_ptr pointer update:
int blake2b_init_dispatch( blake2b_state *S, size_t outlen )
{
/* data race, non-atomic write to blake2b_init_ptr */
blake2b_init_ptr = blake2b_init_table[get_cpu_features()]; /*
return blake2b_init_ptr( S, outlen );
}
*All `_dispatch` functions are likewise affected:**
There is a data race in
blake2-dispatch.cx86/x64 pointer to function CPU dispatching.Internal calls are made through function pointers to functions that initially point to corresponding dispatch function that detects the CPU features available and updates the corresponding pointer to function.
For example
blake2b_init_ptrinitially points toblake2b_init_dispatch. The data race is theblake2b_init_ptrpointer update:*All `_dispatch` functions are likewise affected:**