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Diffstat (limited to 'ipc')
-rw-r--r--ipc/compat.c18
-rw-r--r--ipc/mqueue.c119
-rw-r--r--ipc/shm.c9
-rw-r--r--ipc/syscall.c2
-rw-r--r--ipc/util.c4
-rw-r--r--ipc/util.h2
6 files changed, 68 insertions, 86 deletions
diff --git a/ipc/compat.c b/ipc/compat.c
index a6df704f521e..ad9518eb26e0 100644
--- a/ipc/compat.c
+++ b/ipc/compat.c
@@ -118,7 +118,7 @@ extern int sem_ctls[];
static inline int compat_ipc_parse_version(int *cmd)
{
-#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
+#ifdef CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION
int version = *cmd & IPC_64;
/* this is tricky: architectures that have support for the old
@@ -373,21 +373,21 @@ long compat_sys_semctl(int semid, int semnum, int cmd, int arg)
}
long compat_sys_msgsnd(int msqid, struct compat_msgbuf __user *msgp,
- size_t msgsz, int msgflg)
+ compat_ssize_t msgsz, int msgflg)
{
compat_long_t mtype;
if (get_user(mtype, &msgp->mtype))
return -EFAULT;
- return do_msgsnd(msqid, mtype, msgp->mtext, msgsz, msgflg);
+ return do_msgsnd(msqid, mtype, msgp->mtext, (ssize_t)msgsz, msgflg);
}
long compat_sys_msgrcv(int msqid, struct compat_msgbuf __user *msgp,
- size_t msgsz, long msgtyp, int msgflg)
+ compat_ssize_t msgsz, long msgtyp, int msgflg)
{
long err, mtype;
- err = do_msgrcv(msqid, &mtype, msgp->mtext, msgsz, msgtyp, msgflg);
+ err = do_msgrcv(msqid, &mtype, msgp->mtext, (ssize_t)msgsz, msgtyp, msgflg);
if (err < 0)
goto out;
@@ -514,6 +514,10 @@ long compat_sys_msgctl(int first, int second, void __user *uptr)
return err;
}
+#ifndef COMPAT_SHMLBA
+#define COMPAT_SHMLBA SHMLBA
+#endif
+
#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
void __user *uptr)
@@ -524,7 +528,7 @@ long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
if (version == 1)
return -EINVAL;
- err = do_shmat(first, uptr, second, &raddr);
+ err = do_shmat(first, uptr, second, &raddr, COMPAT_SHMLBA);
if (err < 0)
return err;
uaddr = compat_ptr(third);
@@ -536,7 +540,7 @@ long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg)
unsigned long ret;
long err;
- err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret);
+ err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret, COMPAT_SHMLBA);
if (err)
return err;
force_successful_syscall_return();
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 8ce57691e7b6..f8e54f5b9080 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -413,7 +413,7 @@ static void mqueue_evict_inode(struct inode *inode)
}
static int mqueue_create(struct inode *dir, struct dentry *dentry,
- umode_t mode, struct nameidata *nd)
+ umode_t mode, bool excl)
{
struct inode *inode;
struct mq_attr *attr = dentry->d_fsdata;
@@ -721,8 +721,8 @@ static int mq_attr_ok(struct ipc_namespace *ipc_ns, struct mq_attr *attr)
/*
* Invoked when creating a new queue via sys_mq_open
*/
-static struct file *do_create(struct ipc_namespace *ipc_ns, struct dentry *dir,
- struct dentry *dentry, int oflag, umode_t mode,
+static struct file *do_create(struct ipc_namespace *ipc_ns, struct inode *dir,
+ struct path *path, int oflag, umode_t mode,
struct mq_attr *attr)
{
const struct cred *cred = current_cred();
@@ -732,9 +732,9 @@ static struct file *do_create(struct ipc_namespace *ipc_ns, struct dentry *dir,
if (attr) {
ret = mq_attr_ok(ipc_ns, attr);
if (ret)
- goto out;
+ return ERR_PTR(ret);
/* store for use during create */
- dentry->d_fsdata = attr;
+ path->dentry->d_fsdata = attr;
} else {
struct mq_attr def_attr;
@@ -744,71 +744,51 @@ static struct file *do_create(struct ipc_namespace *ipc_ns, struct dentry *dir,
ipc_ns->mq_msgsize_default);
ret = mq_attr_ok(ipc_ns, &def_attr);
if (ret)
- goto out;
+ return ERR_PTR(ret);
}
mode &= ~current_umask();
- ret = mnt_want_write(ipc_ns->mq_mnt);
+ ret = mnt_want_write(path->mnt);
if (ret)
- goto out;
- ret = vfs_create(dir->d_inode, dentry, mode, NULL);
- dentry->d_fsdata = NULL;
- if (ret)
- goto out_drop_write;
-
- result = dentry_open(dentry, ipc_ns->mq_mnt, oflag, cred);
+ return ERR_PTR(ret);
+ ret = vfs_create(dir, path->dentry, mode, true);
+ path->dentry->d_fsdata = NULL;
+ if (!ret)
+ result = dentry_open(path, oflag, cred);
+ else
+ result = ERR_PTR(ret);
/*
* dentry_open() took a persistent mnt_want_write(),
* so we can now drop this one.
*/
- mnt_drop_write(ipc_ns->mq_mnt);
+ mnt_drop_write(path->mnt);
return result;
-
-out_drop_write:
- mnt_drop_write(ipc_ns->mq_mnt);
-out:
- dput(dentry);
- mntput(ipc_ns->mq_mnt);
- return ERR_PTR(ret);
}
/* Opens existing queue */
-static struct file *do_open(struct ipc_namespace *ipc_ns,
- struct dentry *dentry, int oflag)
+static struct file *do_open(struct path *path, int oflag)
{
- int ret;
- const struct cred *cred = current_cred();
-
static const int oflag2acc[O_ACCMODE] = { MAY_READ, MAY_WRITE,
MAY_READ | MAY_WRITE };
-
- if ((oflag & O_ACCMODE) == (O_RDWR | O_WRONLY)) {
- ret = -EINVAL;
- goto err;
- }
-
- if (inode_permission(dentry->d_inode, oflag2acc[oflag & O_ACCMODE])) {
- ret = -EACCES;
- goto err;
- }
-
- return dentry_open(dentry, ipc_ns->mq_mnt, oflag, cred);
-
-err:
- dput(dentry);
- mntput(ipc_ns->mq_mnt);
- return ERR_PTR(ret);
+ int acc;
+ if ((oflag & O_ACCMODE) == (O_RDWR | O_WRONLY))
+ return ERR_PTR(-EINVAL);
+ acc = oflag2acc[oflag & O_ACCMODE];
+ if (inode_permission(path->dentry->d_inode, acc))
+ return ERR_PTR(-EACCES);
+ return dentry_open(path, oflag, current_cred());
}
SYSCALL_DEFINE4(mq_open, const char __user *, u_name, int, oflag, umode_t, mode,
struct mq_attr __user *, u_attr)
{
- struct dentry *dentry;
+ struct path path;
struct file *filp;
char *name;
struct mq_attr attr;
int fd, error;
struct ipc_namespace *ipc_ns = current->nsproxy->ipc_ns;
+ struct dentry *root = ipc_ns->mq_mnt->mnt_root;
if (u_attr && copy_from_user(&attr, u_attr, sizeof(struct mq_attr)))
return -EFAULT;
@@ -822,52 +802,49 @@ SYSCALL_DEFINE4(mq_open, const char __user *, u_name, int, oflag, umode_t, mode,
if (fd < 0)
goto out_putname;
- mutex_lock(&ipc_ns->mq_mnt->mnt_root->d_inode->i_mutex);
- dentry = lookup_one_len(name, ipc_ns->mq_mnt->mnt_root, strlen(name));
- if (IS_ERR(dentry)) {
- error = PTR_ERR(dentry);
+ error = 0;
+ mutex_lock(&root->d_inode->i_mutex);
+ path.dentry = lookup_one_len(name, root, strlen(name));
+ if (IS_ERR(path.dentry)) {
+ error = PTR_ERR(path.dentry);
goto out_putfd;
}
- mntget(ipc_ns->mq_mnt);
+ path.mnt = mntget(ipc_ns->mq_mnt);
if (oflag & O_CREAT) {
- if (dentry->d_inode) { /* entry already exists */
- audit_inode(name, dentry);
+ if (path.dentry->d_inode) { /* entry already exists */
+ audit_inode(name, path.dentry);
if (oflag & O_EXCL) {
error = -EEXIST;
goto out;
}
- filp = do_open(ipc_ns, dentry, oflag);
+ filp = do_open(&path, oflag);
} else {
- filp = do_create(ipc_ns, ipc_ns->mq_mnt->mnt_root,
- dentry, oflag, mode,
+ filp = do_create(ipc_ns, root->d_inode,
+ &path, oflag, mode,
u_attr ? &attr : NULL);
}
} else {
- if (!dentry->d_inode) {
+ if (!path.dentry->d_inode) {
error = -ENOENT;
goto out;
}
- audit_inode(name, dentry);
- filp = do_open(ipc_ns, dentry, oflag);
+ audit_inode(name, path.dentry);
+ filp = do_open(&path, oflag);
}
- if (IS_ERR(filp)) {
+ if (!IS_ERR(filp))
+ fd_install(fd, filp);
+ else
error = PTR_ERR(filp);
- goto out_putfd;
- }
-
- fd_install(fd, filp);
- goto out_upsem;
-
out:
- dput(dentry);
- mntput(ipc_ns->mq_mnt);
+ path_put(&path);
out_putfd:
- put_unused_fd(fd);
- fd = error;
-out_upsem:
- mutex_unlock(&ipc_ns->mq_mnt->mnt_root->d_inode->i_mutex);
+ if (error) {
+ put_unused_fd(fd);
+ fd = error;
+ }
+ mutex_unlock(&root->d_inode->i_mutex);
out_putname:
putname(name);
return fd;
diff --git a/ipc/shm.c b/ipc/shm.c
index 41c1285d697a..00faa05cf72a 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -953,7 +953,8 @@ out:
* "raddr" thing points to kernel space, and there has to be a wrapper around
* this.
*/
-long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr)
+long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr,
+ unsigned long shmlba)
{
struct shmid_kernel *shp;
unsigned long addr;
@@ -973,9 +974,9 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr)
if (shmid < 0)
goto out;
else if ((addr = (ulong)shmaddr)) {
- if (addr & (SHMLBA-1)) {
+ if (addr & (shmlba - 1)) {
if (shmflg & SHM_RND)
- addr &= ~(SHMLBA-1); /* round down */
+ addr &= ~(shmlba - 1); /* round down */
else
#ifndef __ARCH_FORCE_SHMLBA
if (addr & ~PAGE_MASK)
@@ -1107,7 +1108,7 @@ SYSCALL_DEFINE3(shmat, int, shmid, char __user *, shmaddr, int, shmflg)
unsigned long ret;
long err;
- err = do_shmat(shmid, shmaddr, shmflg, &ret);
+ err = do_shmat(shmid, shmaddr, shmflg, &ret, SHMLBA);
if (err)
return err;
force_successful_syscall_return();
diff --git a/ipc/syscall.c b/ipc/syscall.c
index 1d6f53f6b562..0d1e32ce048e 100644
--- a/ipc/syscall.c
+++ b/ipc/syscall.c
@@ -73,7 +73,7 @@ SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, unsigned long, second,
default: {
unsigned long raddr;
ret = do_shmat(first, (char __user *)ptr,
- second, &raddr);
+ second, &raddr, SHMLBA);
if (ret)
return ret;
return put_user(raddr, (unsigned long __user *) third);
diff --git a/ipc/util.c b/ipc/util.c
index 75261a31d48d..eb07fd356f27 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -804,7 +804,7 @@ out_up:
return ERR_PTR(err);
}
-#ifdef __ARCH_WANT_IPC_PARSE_VERSION
+#ifdef CONFIG_ARCH_WANT_IPC_PARSE_VERSION
/**
@@ -826,7 +826,7 @@ int ipc_parse_version (int *cmd)
}
}
-#endif /* __ARCH_WANT_IPC_PARSE_VERSION */
+#endif /* CONFIG_ARCH_WANT_IPC_PARSE_VERSION */
#ifdef CONFIG_PROC_FS
struct ipc_proc_iter {
diff --git a/ipc/util.h b/ipc/util.h
index 6f5c20bedaab..850ef3e962cb 100644
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -130,7 +130,7 @@ struct kern_ipc_perm *ipcctl_pre_down(struct ipc_namespace *ns,
struct ipc_ids *ids, int id, int cmd,
struct ipc64_perm *perm, int extra_perm);
-#ifndef __ARCH_WANT_IPC_PARSE_VERSION
+#ifndef CONFIG_ARCH_WANT_IPC_PARSE_VERSION
/* On IA-64, we always use the "64-bit version" of the IPC structures. */
# define ipc_parse_version(cmd) IPC_64
#else
generated by cgit v1.2.3 (git 2.39.0) at 2025-11-04 10:00:20 +0300