--- a/lib/crypto_backend/crypto_cipher_kernel.c +++ b/lib/crypto_backend/crypto_cipher_kernel.c @@ -31,6 +31,7 @@ #ifdef ENABLE_AF_ALG #include +#include #ifndef AF_ALG #define AF_ALG 38 @@ -88,6 +89,35 @@ int crypt_cipher_blocksize(const char *n return ca ? ca->blocksize : -EINVAL; } +static size_t pagesize(size_t defsize) +{ + long r = sysconf(_SC_PAGESIZE); + return r < 0 ? defsize : (size_t)r; +} + +static int check_rh_kernel_version(void) +{ + unsigned maj, mid, min, rel; + static struct utsname uts = {{ 0 }}; + size_t ps = pagesize(32768); + + if (ps < 32768) + return 0; + + if (!*uts.release && uname(&uts) < 0) + return -ENOTSUP; + /* + * RH kernels 3.10.0-185 and lower are affected by a crypto API kernel + * socket bug. The bug only manifests on archs with page size >= 32 KiB. + * + * For reference, see rhbz#1136075 + */ + if (sscanf(uts.release, "%u.%u.%u-%u", &maj, &mid, &min, &rel) == 4) + return (maj == 3 && mid == 10 && min == 0 && rel < 186) ? -ENOTSUP : 0; + + return -ENOTSUP; +} + /* * ciphers * @@ -104,6 +134,9 @@ int crypt_cipher_init(struct crypt_ciphe .salg_type = "skcipher", }; + if (check_rh_kernel_version()) + return -ENOTSUP; + h = malloc(sizeof(*h)); if (!h) return -ENOMEM;