diff options
Diffstat (limited to 'security/apparmor/lsm.c')
| -rw-r--r-- | security/apparmor/lsm.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c index 16568b6d589d..808060f9effb 100644 --- a/security/apparmor/lsm.c +++ b/security/apparmor/lsm.c @@ -461,6 +461,7 @@ static int apparmor_file_open(struct file *file) struct aa_file_ctx *fctx = file_ctx(file); struct aa_label *label; int error = 0; + bool needput; if (!path_mediated_fs(file->f_path.dentry)) return 0; @@ -477,7 +478,7 @@ static int apparmor_file_open(struct file *file) return 0; } - label = aa_get_newest_cred_label(file->f_cred); + label = aa_get_newest_cred_label_condref(file->f_cred, &needput); if (!unconfined(label)) { struct mnt_idmap *idmap = file_mnt_idmap(file); struct inode *inode = file_inode(file); @@ -494,7 +495,7 @@ static int apparmor_file_open(struct file *file) /* todo cache full allowed permissions set and state */ fctx->allow = aa_map_file_to_perms(file); } - aa_put_label(label); + aa_put_label_condref(label, needput); return error; } @@ -1124,7 +1125,7 @@ static int apparmor_socket_create(int family, int type, int protocol, int kern) * @sock: socket that is being setup * @family: family of socket being created * @type: type of the socket - * @ptotocol: protocol of the socket + * @protocol: protocol of the socket * @kern: socket is a special kernel socket * * Note: @@ -1304,6 +1305,13 @@ static int apparmor_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb) if (!skb->secmark) return 0; + /* + * If reach here before socket_post_create hook is called, in which + * case label is null, drop the packet. + */ + if (!ctx->label) + return -EACCES; + return apparmor_secmark_check(ctx->label, OP_RECVMSG, AA_MAY_RECEIVE, skb->secmark, sk); } |