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Description of problem:
The annocheck fail is triggered by following code snippet in lib/crypto_backend/argon2/core.c (bundled argon2 implementation in cryptsetup library):
void __attribute__((optimize("O0"))) secure_wipe_memory(void *v, size_t n) {
#if defined(_MSC_VER) && VC_GE_2005(_MSC_VER)
SecureZeroMemory(v, n);
#elif defined memset_s
memset_s(v, n, 0, n);
#elif defined(HAVE_EXPLICIT_BZERO)
explicit_bzero(v, n);
#else
static void *(*const volatile memset_sec)(void *, int, size_t) = &memset;
memset_sec(v, 0, n);
#endif
}
Basically referential implementation of argon2 algorithm is using sub-optimal solution to avoid security related memory wipe function being optimized out by compiler.
Note that explicit_bzero() function is available in RHEL9 glibc so the optimization annotation is basically useless (explicit_bzero can not be optimized out by definition).
The bug is not critical since it's only single function used only in argon2 implementation.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory (new packages: cryptsetup), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2022:3913
Description of problem: The annocheck fail is triggered by following code snippet in lib/crypto_backend/argon2/core.c (bundled argon2 implementation in cryptsetup library): void __attribute__((optimize("O0"))) secure_wipe_memory(void *v, size_t n) { #if defined(_MSC_VER) && VC_GE_2005(_MSC_VER) SecureZeroMemory(v, n); #elif defined memset_s memset_s(v, n, 0, n); #elif defined(HAVE_EXPLICIT_BZERO) explicit_bzero(v, n); #else static void *(*const volatile memset_sec)(void *, int, size_t) = &memset; memset_sec(v, 0, n); #endif } Basically referential implementation of argon2 algorithm is using sub-optimal solution to avoid security related memory wipe function being optimized out by compiler. Note that explicit_bzero() function is available in RHEL9 glibc so the optimization annotation is basically useless (explicit_bzero can not be optimized out by definition). The bug is not critical since it's only single function used only in argon2 implementation.