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-rw-r--r--ipc/mqueue.c97
-rw-r--r--ipc/sem.c2
-rw-r--r--ipc/shm.c4
-rw-r--r--ipc/util.c18
4 files changed, 56 insertions, 65 deletions
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 41b72f02fa70..eddb6247a553 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -523,31 +523,27 @@ static void __do_notify(struct mqueue_inode_info *info)
wake_up(&info->wait_q);
}
-static long prepare_timeout(const struct timespec __user *u_arg)
+static long prepare_timeout(struct timespec *p)
{
- struct timespec ts, nowts;
+ struct timespec nowts;
long timeout;
- if (u_arg) {
- if (unlikely(copy_from_user(&ts, u_arg,
- sizeof(struct timespec))))
- return -EFAULT;
-
- if (unlikely(ts.tv_nsec < 0 || ts.tv_sec < 0
- || ts.tv_nsec >= NSEC_PER_SEC))
+ if (p) {
+ if (unlikely(p->tv_nsec < 0 || p->tv_sec < 0
+ || p->tv_nsec >= NSEC_PER_SEC))
return -EINVAL;
nowts = CURRENT_TIME;
/* first subtract as jiffies can't be too big */
- ts.tv_sec -= nowts.tv_sec;
- if (ts.tv_nsec < nowts.tv_nsec) {
- ts.tv_nsec += NSEC_PER_SEC;
- ts.tv_sec--;
+ p->tv_sec -= nowts.tv_sec;
+ if (p->tv_nsec < nowts.tv_nsec) {
+ p->tv_nsec += NSEC_PER_SEC;
+ p->tv_sec--;
}
- ts.tv_nsec -= nowts.tv_nsec;
- if (ts.tv_sec < 0)
+ p->tv_nsec -= nowts.tv_nsec;
+ if (p->tv_sec < 0)
return 0;
- timeout = timespec_to_jiffies(&ts) + 1;
+ timeout = timespec_to_jiffies(p) + 1;
} else
return MAX_SCHEDULE_TIMEOUT;
@@ -591,22 +587,18 @@ static int mq_attr_ok(struct mq_attr *attr)
* Invoked when creating a new queue via sys_mq_open
*/
static struct file *do_create(struct dentry *dir, struct dentry *dentry,
- int oflag, mode_t mode, struct mq_attr __user *u_attr)
+ int oflag, mode_t mode, struct mq_attr *attr)
{
const struct cred *cred = current_cred();
- struct mq_attr attr;
struct file *result;
int ret;
- if (u_attr) {
- ret = -EFAULT;
- if (copy_from_user(&attr, u_attr, sizeof(attr)))
- goto out;
+ if (attr) {
ret = -EINVAL;
- if (!mq_attr_ok(&attr))
+ if (!mq_attr_ok(attr))
goto out;
/* store for use during create */
- dentry->d_fsdata = &attr;
+ dentry->d_fsdata = attr;
}
mode &= ~current->fs->umask;
@@ -663,11 +655,13 @@ asmlinkage long sys_mq_open(const char __user *u_name, int oflag, mode_t mode,
struct dentry *dentry;
struct file *filp;
char *name;
+ struct mq_attr attr;
int fd, error;
- error = audit_mq_open(oflag, mode, u_attr);
- if (error != 0)
- return error;
+ if (u_attr && copy_from_user(&attr, u_attr, sizeof(struct mq_attr)))
+ return -EFAULT;
+
+ audit_mq_open(oflag, mode, u_attr ? &attr : NULL);
if (IS_ERR(name = getname(u_name)))
return PTR_ERR(name);
@@ -693,7 +687,8 @@ asmlinkage long sys_mq_open(const char __user *u_name, int oflag, mode_t mode,
filp = do_open(dentry, oflag);
} else {
filp = do_create(mqueue_mnt->mnt_root, dentry,
- oflag, mode, u_attr);
+ oflag, mode,
+ u_attr ? &attr : NULL);
}
} else {
error = -ENOENT;
@@ -828,17 +823,22 @@ asmlinkage long sys_mq_timedsend(mqd_t mqdes, const char __user *u_msg_ptr,
struct ext_wait_queue *receiver;
struct msg_msg *msg_ptr;
struct mqueue_inode_info *info;
+ struct timespec ts, *p = NULL;
long timeout;
int ret;
- ret = audit_mq_timedsend(mqdes, msg_len, msg_prio, u_abs_timeout);
- if (ret != 0)
- return ret;
+ if (u_abs_timeout) {
+ if (copy_from_user(&ts, u_abs_timeout,
+ sizeof(struct timespec)))
+ return -EFAULT;
+ p = &ts;
+ }
if (unlikely(msg_prio >= (unsigned long) MQ_PRIO_MAX))
return -EINVAL;
- timeout = prepare_timeout(u_abs_timeout);
+ audit_mq_sendrecv(mqdes, msg_len, msg_prio, p);
+ timeout = prepare_timeout(p);
ret = -EBADF;
filp = fget(mqdes);
@@ -917,12 +917,17 @@ asmlinkage ssize_t sys_mq_timedreceive(mqd_t mqdes, char __user *u_msg_ptr,
struct inode *inode;
struct mqueue_inode_info *info;
struct ext_wait_queue wait;
+ struct timespec ts, *p = NULL;
- ret = audit_mq_timedreceive(mqdes, msg_len, u_msg_prio, u_abs_timeout);
- if (ret != 0)
- return ret;
+ if (u_abs_timeout) {
+ if (copy_from_user(&ts, u_abs_timeout,
+ sizeof(struct timespec)))
+ return -EFAULT;
+ p = &ts;
+ }
- timeout = prepare_timeout(u_abs_timeout);
+ audit_mq_sendrecv(mqdes, msg_len, 0, p);
+ timeout = prepare_timeout(p);
ret = -EBADF;
filp = fget(mqdes);
@@ -1002,17 +1007,17 @@ asmlinkage long sys_mq_notify(mqd_t mqdes,
struct mqueue_inode_info *info;
struct sk_buff *nc;
- ret = audit_mq_notify(mqdes, u_notification);
- if (ret != 0)
- return ret;
-
- nc = NULL;
- sock = NULL;
- if (u_notification != NULL) {
+ if (u_notification) {
if (copy_from_user(&notification, u_notification,
sizeof(struct sigevent)))
return -EFAULT;
+ }
+ audit_mq_notify(mqdes, u_notification ? &notification : NULL);
+
+ nc = NULL;
+ sock = NULL;
+ if (u_notification != NULL) {
if (unlikely(notification.sigev_notify != SIGEV_NONE &&
notification.sigev_notify != SIGEV_SIGNAL &&
notification.sigev_notify != SIGEV_THREAD))
@@ -1149,11 +1154,7 @@ asmlinkage long sys_mq_getsetattr(mqd_t mqdes,
omqstat = info->attr;
omqstat.mq_flags = filp->f_flags & O_NONBLOCK;
if (u_mqstat) {
- ret = audit_mq_getsetattr(mqdes, &mqstat);
- if (ret != 0) {
- spin_unlock(&info->lock);
- goto out_fput;
- }
+ audit_mq_getsetattr(mqdes, &mqstat);
if (mqstat.mq_flags & O_NONBLOCK)
filp->f_flags |= O_NONBLOCK;
else
diff --git a/ipc/sem.c b/ipc/sem.c
index 082122469b17..fea0ad3aed7b 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -58,7 +58,7 @@
* SMP-threaded, sysctl's added
* (c) 1999 Manfred Spraul <manfred@colorfullife.com>
* Enforced range limit on SEM_UNDO
- * (c) 2001 Red Hat Inc <alan@redhat.com>
+ * (c) 2001 Red Hat Inc
* Lockless wakeup
* (c) 2003 Manfred Spraul <manfred@colorfullife.com>
*
diff --git a/ipc/shm.c b/ipc/shm.c
index 38a055758a9b..57dd50046cef 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -747,9 +747,7 @@ asmlinkage long sys_shmctl(int shmid, int cmd, struct shmid_ds __user *buf)
goto out;
}
- err = audit_ipc_obj(&(shp->shm_perm));
- if (err)
- goto out_unlock;
+ audit_ipc_obj(&(shp->shm_perm));
if (!capable(CAP_IPC_LOCK)) {
uid_t euid = current_euid();
diff --git a/ipc/util.c b/ipc/util.c
index 5a1808c774a2..7585a72e259b 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -624,10 +624,9 @@ void ipc_rcu_putref(void *ptr)
int ipcperms (struct kern_ipc_perm *ipcp, short flag)
{ /* flag will most probably be 0 or S_...UGO from <linux/stat.h> */
uid_t euid = current_euid();
- int requested_mode, granted_mode, err;
+ int requested_mode, granted_mode;
- if (unlikely((err = audit_ipc_obj(ipcp))))
- return err;
+ audit_ipc_obj(ipcp);
requested_mode = (flag >> 6) | (flag >> 3) | flag;
granted_mode = ipcp->mode;
if (euid == ipcp->cuid ||
@@ -803,16 +802,10 @@ struct kern_ipc_perm *ipcctl_pre_down(struct ipc_ids *ids, int id, int cmd,
goto out_up;
}
- err = audit_ipc_obj(ipcp);
- if (err)
- goto out_unlock;
-
- if (cmd == IPC_SET) {
- err = audit_ipc_set_perm(extra_perm, perm->uid,
+ audit_ipc_obj(ipcp);
+ if (cmd == IPC_SET)
+ audit_ipc_set_perm(extra_perm, perm->uid,
perm->gid, perm->mode);
- if (err)
- goto out_unlock;
- }
euid = current_euid();
if (euid == ipcp->cuid ||
@@ -820,7 +813,6 @@ struct kern_ipc_perm *ipcctl_pre_down(struct ipc_ids *ids, int id, int cmd,
return ipcp;
err = -EPERM;
-out_unlock:
ipc_unlock(ipcp);
out_up:
up_write(&ids->rw_mutex);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.