diff options
Diffstat (limited to 'fs/ksmbd/smbacl.c')
| -rw-r--r-- | fs/ksmbd/smbacl.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/ksmbd/smbacl.c b/fs/ksmbd/smbacl.c index 3a6c0abdb035..ecf9db3d69c3 100644 --- a/fs/ksmbd/smbacl.c +++ b/fs/ksmbd/smbacl.c @@ -396,7 +396,9 @@ static void parse_dacl(struct user_namespace *user_ns, if (num_aces <= 0) return; - if (num_aces > ULONG_MAX / sizeof(struct smb_ace *)) + if (num_aces > (le16_to_cpu(pdacl->size) - sizeof(struct smb_acl)) / + (offsetof(struct smb_ace, sid) + + offsetof(struct smb_sid, sub_auth) + sizeof(__le16))) return; ret = init_acl_state(&acl_state, num_aces); @@ -430,6 +432,7 @@ static void parse_dacl(struct user_namespace *user_ns, offsetof(struct smb_sid, sub_auth); if (end_of_acl - acl_base < acl_size || + ppace[i]->sid.num_subauth == 0 || ppace[i]->sid.num_subauth > SID_MAX_SUB_AUTHORITIES || (end_of_acl - acl_base < acl_size + sizeof(__le32) * ppace[i]->sid.num_subauth) || |