diff options
Diffstat (limited to 'security/smack/smack_lsm.c')
| -rw-r--r-- | security/smack/smack_lsm.c | 52 |
1 files changed, 49 insertions, 3 deletions
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index 001831458fa2..dadcb9941da5 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -42,6 +42,7 @@ #include <linux/fs_context.h> #include <linux/fs_parser.h> #include <linux/watch_queue.h> +#include <linux/io_uring.h> #include "smack.h" #define TRANS_TRUE "TRUE" @@ -496,13 +497,11 @@ static int smack_ptrace_access_check(struct task_struct *ctp, unsigned int mode) */ static int smack_ptrace_traceme(struct task_struct *ptp) { - int rc; struct smack_known *skp; skp = smk_of_task(smack_cred(current_cred())); - rc = smk_ptrace_rule_check(ptp, skp, PTRACE_MODE_ATTACH, __func__); - return rc; + return smk_ptrace_rule_check(ptp, skp, PTRACE_MODE_ATTACH, __func__); } /** @@ -2279,6 +2278,21 @@ static void smack_sk_free_security(struct sock *sk) } /** + * smack_sk_clone_security - Copy security context + * @sk: the old socket + * @newsk: the new socket + * + * Copy the security context of the old socket pointer to the cloned + */ +static void smack_sk_clone_security(const struct sock *sk, struct sock *newsk) +{ + struct socket_smack *ssp_old = sk->sk_security; + struct socket_smack *ssp_new = newsk->sk_security; + + *ssp_new = *ssp_old; +} + +/** * smack_ipv4host_label - check host based restrictions * @sip: the object end * @@ -4732,6 +4746,36 @@ static int smack_uring_sqpoll(void) return -EPERM; } +/** + * smack_uring_cmd - check on file operations for io_uring + * @ioucmd: the command in question + * + * Make a best guess about whether a io_uring "command" should + * be allowed. Use the same logic used for determining if the + * file could be opened for read in the absence of better criteria. + */ +static int smack_uring_cmd(struct io_uring_cmd *ioucmd) +{ + struct file *file = ioucmd->file; + struct smk_audit_info ad; + struct task_smack *tsp; + struct inode *inode; + int rc; + + if (!file) + return -EINVAL; + + tsp = smack_cred(file->f_cred); + inode = file_inode(file); + + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH); + smk_ad_setfield_u_fs_path(&ad, file->f_path); + rc = smk_tskacc(tsp, smk_of_inode(inode), MAY_READ, &ad); + rc = smk_bu_credfile(file->f_cred, file, MAY_READ, rc); + + return rc; +} + #endif /* CONFIG_IO_URING */ struct lsm_blob_sizes smack_blob_sizes __lsm_ro_after_init = { @@ -4851,6 +4895,7 @@ static struct security_hook_list smack_hooks[] __lsm_ro_after_init = { LSM_HOOK_INIT(socket_getpeersec_dgram, smack_socket_getpeersec_dgram), LSM_HOOK_INIT(sk_alloc_security, smack_sk_alloc_security), LSM_HOOK_INIT(sk_free_security, smack_sk_free_security), + LSM_HOOK_INIT(sk_clone_security, smack_sk_clone_security), LSM_HOOK_INIT(sock_graft, smack_sock_graft), LSM_HOOK_INIT(inet_conn_request, smack_inet_conn_request), LSM_HOOK_INIT(inet_csk_clone, smack_inet_csk_clone), @@ -4889,6 +4934,7 @@ static struct security_hook_list smack_hooks[] __lsm_ro_after_init = { #ifdef CONFIG_IO_URING LSM_HOOK_INIT(uring_override_creds, smack_uring_override_creds), LSM_HOOK_INIT(uring_sqpoll, smack_uring_sqpoll), + LSM_HOOK_INIT(uring_cmd, smack_uring_cmd), #endif }; |