diff options
Diffstat (limited to 'fs/cifs/cifsacl.c')
| -rw-r--r-- | fs/cifs/cifsacl.c | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c index 8dd9212ffef5..75c1ee699143 100644 --- a/fs/cifs/cifsacl.c +++ b/fs/cifs/cifsacl.c @@ -94,6 +94,7 @@ sid_to_key_str(struct cifs_sid *sidptr, unsigned int type) int i, len; unsigned int saval; char *sidstr, *strptr; + unsigned long long id_auth_val; /* 3 bytes for prefix */ sidstr = kmalloc(3 + SID_STRING_BASE_SIZE + @@ -107,12 +108,24 @@ sid_to_key_str(struct cifs_sid *sidptr, unsigned int type) sidptr->revision); strptr += len; - for (i = 0; i < NUM_AUTHS; ++i) { - if (sidptr->authority[i]) { - len = sprintf(strptr, "-%hhu", sidptr->authority[i]); - strptr += len; - } - } + /* The authority field is a single 48-bit number */ + id_auth_val = (unsigned long long)sidptr->authority[5]; + id_auth_val |= (unsigned long long)sidptr->authority[4] << 8; + id_auth_val |= (unsigned long long)sidptr->authority[3] << 16; + id_auth_val |= (unsigned long long)sidptr->authority[2] << 24; + id_auth_val |= (unsigned long long)sidptr->authority[1] << 32; + id_auth_val |= (unsigned long long)sidptr->authority[0] << 48; + + /* + * MS-DTYP states that if the authority is >= 2^32, then it should be + * expressed as a hex value. + */ + if (id_auth_val <= UINT_MAX) + len = sprintf(strptr, "-%llu", id_auth_val); + else + len = sprintf(strptr, "-0x%llx", id_auth_val); + + strptr += len; for (i = 0; i < sidptr->num_subauth; ++i) { saval = le32_to_cpu(sidptr->sub_auth[i]); |