#include <linux/syscalls.h>
#include <linux/ctype.h>
#include <linux/module.h>
+#include <linux/dnotify.h>
+#include <linux/highuid.h>
+#include <linux/sunrpc/svc.h>
+#include <linux/nfsd/nfsd.h>
+#include <linux/nfsd/syscall.h>
+#include <linux/personality.h>
+
#include <net/sock.h> /* siocdevprivate_ioctl */
#include <asm/uaccess.h>
+#include <asm/mmu_context.h>
/*
* Not all architectures have sys_utime, so implement this in terms
* of sys_utimes.
*/
-asmlinkage long compat_sys_utime(char *filename, struct compat_utimbuf *t)
+asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t)
{
struct timeval tv[2];
return do_utimes(filename, t ? tv : NULL);
}
-asmlinkage long compat_sys_utimes(char *filename, struct compat_timeval *t)
+asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
{
struct timeval tv[2];
return do_utimes(filename, t ? tv : NULL);
}
-asmlinkage long compat_sys_newstat(char * filename,
- struct compat_stat *statbuf)
+asmlinkage long compat_sys_newstat(char __user * filename,
+ struct compat_stat __user *statbuf)
{
struct kstat stat;
int error = vfs_stat(filename, &stat);
return error;
}
-asmlinkage long compat_sys_newlstat(char * filename,
- struct compat_stat *statbuf)
+asmlinkage long compat_sys_newlstat(char __user * filename,
+ struct compat_stat __user *statbuf)
{
struct kstat stat;
int error = vfs_lstat(filename, &stat);
}
asmlinkage long compat_sys_newfstat(unsigned int fd,
- struct compat_stat * statbuf)
+ struct compat_stat __user * statbuf)
{
struct kstat stat;
int error = vfs_fstat(fd, &stat);
return error;
}
-static int put_compat_statfs(struct compat_statfs *ubuf, struct kstatfs *kbuf)
+static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
{
if (sizeof ubuf->f_blocks == 4) {
* The following statfs calls are copies of code from fs/open.c and
* should be checked against those from time to time
*/
-asmlinkage long compat_sys_statfs(const char *path, struct compat_statfs *buf)
+asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf)
{
struct nameidata nd;
int error;
return error;
}
-asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs *buf)
+asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
{
struct file * file;
struct kstatfs tmp;
return error;
}
-static int put_compat_statfs64(struct compat_statfs64 *ubuf, struct kstatfs *kbuf)
+static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
{
if (sizeof ubuf->f_blocks == 4) {
if ((kbuf->f_blocks | kbuf->f_bfree |
return 0;
}
-asmlinkage long compat_statfs64(const char *path, compat_size_t sz, struct compat_statfs64 *buf)
+asmlinkage long compat_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf)
{
struct nameidata nd;
int error;
return error;
}
-asmlinkage long compat_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 *buf)
+asmlinkage long compat_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
{
struct file * file;
struct kstatfs tmp;
__initcall(init_sys32_ioctl);
-static struct ioctl_trans *ioctl_free_list;
-
-/* Never free them really. This avoids SMP races. With a Read-Copy-Update
- enabled kernel we could just use the RCU infrastructure for this. */
-static void free_ioctl(struct ioctl_trans *t)
-{
- t->cmd = 0;
- mb();
- t->next = ioctl_free_list;
- ioctl_free_list = t;
-}
-
-int register_ioctl32_conversion(unsigned int cmd, int (*handler)(unsigned int, unsigned int, unsigned long, struct file *))
+int register_ioctl32_conversion(unsigned int cmd, int (*handler)(unsigned int,
+ unsigned int, unsigned long, struct file *))
{
struct ioctl_trans *t;
+ struct ioctl_trans *new_t;
unsigned long hash = ioctl32_hash(cmd);
+ new_t = kmalloc(sizeof(*new_t), GFP_KERNEL);
+ if (!new_t)
+ return -ENOMEM;
+
lock_kernel();
- for (t = (struct ioctl_trans *)ioctl32_hash_table[hash];
- t;
- t = t->next) {
+ for (t = ioctl32_hash_table[hash]; t; t = t->next) {
if (t->cmd == cmd) {
- printk("Trying to register duplicated ioctl32 handler %x\n", cmd);
+ printk(KERN_ERR "Trying to register duplicated ioctl32 "
+ "handler %x\n", cmd);
unlock_kernel();
+ kfree(new_t);
return -EINVAL;
}
- }
-
- if (ioctl_free_list) {
- t = ioctl_free_list;
- ioctl_free_list = t->next;
- } else {
- t = kmalloc(sizeof(struct ioctl_trans), GFP_KERNEL);
- if (!t) {
- unlock_kernel();
- return -ENOMEM;
- }
}
-
- t->next = NULL;
- t->cmd = cmd;
- t->handler = handler;
- ioctl32_insert_translation(t);
+ new_t->next = NULL;
+ new_t->cmd = cmd;
+ new_t->handler = handler;
+ ioctl32_insert_translation(new_t);
unlock_kernel();
return 0;
}
+EXPORT_SYMBOL(register_ioctl32_conversion);
static inline int builtin_ioctl(struct ioctl_trans *t)
{
lock_kernel();
- t = (struct ioctl_trans *)ioctl32_hash_table[hash];
+ t = ioctl32_hash_table[hash];
if (!t) {
unlock_kernel();
return -EINVAL;
printk("%p tried to unregister builtin ioctl %x\n",
__builtin_return_address(0), cmd);
} else {
- ioctl32_hash_table[hash] = t->next;
- free_ioctl(t);
+ ioctl32_hash_table[hash] = t->next;
unlock_kernel();
- return 0;
+ kfree(t);
+ return 0;
}
}
while (t->next) {
- t1 = (struct ioctl_trans *)(long)t->next;
+ t1 = t->next;
if (t1->cmd == cmd) {
if (builtin_ioctl(t1)) {
- printk("%p tried to unregister builtin ioctl %x\n",
- __builtin_return_address(0), cmd);
+ printk("%p tried to unregister builtin "
+ "ioctl %x\n",
+ __builtin_return_address(0), cmd);
goto out;
} else {
- t->next = t1->next;
- free_ioctl(t1);
+ t->next = t1->next;
unlock_kernel();
- return 0;
+ kfree(t1);
+ return 0;
}
}
t = t1;
}
- printk(KERN_ERR "Trying to free unknown 32bit ioctl handler %x\n", cmd);
- out:
+ printk(KERN_ERR "Trying to free unknown 32bit ioctl handler %x\n",
+ cmd);
+out:
unlock_kernel();
return -EINVAL;
}
-
-EXPORT_SYMBOL(register_ioctl32_conversion);
EXPORT_SYMBOL(unregister_ioctl32_conversion);
-asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
+asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
+ unsigned long arg)
{
struct file * filp;
int error = -EBADF;
goto out;
}
- t = (struct ioctl_trans *)ioctl32_hash_table [ioctl32_hash (cmd)];
+ lock_kernel();
+
+ t = ioctl32_hash_table[ioctl32_hash (cmd)];
while (t && t->cmd != cmd)
- t = (struct ioctl_trans *)t->next;
+ t = t->next;
if (t) {
if (t->handler) {
- lock_kernel();
error = t->handler(fd, cmd, arg, filp);
unlock_kernel();
- } else
+ } else {
+ unlock_kernel();
error = sys_ioctl(fd, cmd, arg);
- } else if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
- error = siocdevprivate_ioctl(fd, cmd, arg);
+ }
} else {
- static int count;
- if (++count <= 50) {
- char buf[10];
- char *path = (char *)__get_free_page(GFP_KERNEL), *fn = "?";
-
- /* find the name of the device. */
- if (path) {
- fn = d_path(filp->f_dentry, filp->f_vfsmnt,
- path, PAGE_SIZE);
+ unlock_kernel();
+ if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
+ error = siocdevprivate_ioctl(fd, cmd, arg);
+ } else {
+ static int count;
+ if (++count <= 50) {
+ char buf[10];
+ char *fn = "?";
+ char *path;
+
+ path = (char *)__get_free_page(GFP_KERNEL);
+
+ /* find the name of the device. */
+ if (path) {
+ fn = d_path(filp->f_dentry,
+ filp->f_vfsmnt, path,
+ PAGE_SIZE);
+ }
+
+ sprintf(buf,"'%c'", (cmd>>24) & 0x3f);
+ if (!isprint(buf[1]))
+ sprintf(buf, "%02x", buf[1]);
+ printk("ioctl32(%s:%d): Unknown cmd fd(%d) "
+ "cmd(%08x){%s} arg(%08x) on %s\n",
+ current->comm, current->pid,
+ (int)fd, (unsigned int)cmd, buf,
+ (unsigned int)arg, fn);
+ if (path)
+ free_page((unsigned long)path);
}
-
- sprintf(buf,"'%c'", (cmd>>24) & 0x3f);
- if (!isprint(buf[1]))
- sprintf(buf, "%02x", buf[1]);
- printk("ioctl32(%s:%d): Unknown cmd fd(%d) "
- "cmd(%08x){%s} arg(%08x) on %s\n",
- current->comm, current->pid,
- (int)fd, (unsigned int)cmd, buf, (unsigned int)arg,
- fn);
- if (path)
- free_page((unsigned long)path);
+ error = -EINVAL;
}
- error = -EINVAL;
}
out:
fput(filp);
return error;
}
-static int get_compat_flock(struct flock *kfl, struct compat_flock *ufl)
+static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
{
if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
__get_user(kfl->l_type, &ufl->l_type) ||
return 0;
}
-static int put_compat_flock(struct flock *kfl, struct compat_flock *ufl)
+static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
{
if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
__put_user(kfl->l_type, &ufl->l_type) ||
}
#ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
-static int get_compat_flock64(struct flock *kfl, struct compat_flock64 *ufl)
+static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
{
if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
__get_user(kfl->l_type, &ufl->l_type) ||
#endif
#ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
-static int put_compat_flock64(struct flock *kfl, struct compat_flock64 *ufl)
+static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
{
if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
__put_user(kfl->l_type, &ufl->l_type) ||
}
asmlinkage long
-compat_sys_io_setup(unsigned nr_reqs, u32 *ctx32p)
+compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
{
long ret;
aio_context_t ctx64;
return -EFAULT;
set_fs(KERNEL_DS);
- ret = sys_io_setup(nr_reqs, &ctx64);
+ /* The __user pointer cast is valid because of the set_fs() */
+ ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
set_fs(oldfs);
/* truncating is ok because it's a user address */
if (!ret)
compat_sys_io_getevents(aio_context_t ctx_id,
unsigned long min_nr,
unsigned long nr,
- struct io_event *events,
- struct compat_timespec *timeout)
+ struct io_event __user *events,
+ struct compat_timespec __user *timeout)
{
long ret;
struct timespec t;
- struct timespec *ut = NULL;
+ struct timespec __user *ut = NULL;
ret = -EFAULT;
if (unlikely(!access_ok(VERIFY_WRITE, events,
}
static inline long
-copy_iocb(long nr, u32 *ptr32, u64 *ptr64)
+copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
{
compat_uptr_t uptr;
int i;
for (i = 0; i < nr; ++i) {
if (get_user(uptr, ptr32 + i))
return -EFAULT;
- if (put_user((u64)compat_ptr(uptr), ptr64 + i))
+ if (put_user(compat_ptr(uptr), ptr64 + i))
return -EFAULT;
}
return 0;
#define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
asmlinkage long
-compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 *iocb)
+compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
{
- struct iocb **iocb64;
+ struct iocb __user * __user *iocb64;
long ret;
if (unlikely(nr < 0))
nr = MAX_AIO_SUBMITS;
iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
- ret = copy_iocb(nr, iocb, (u64 *) iocb64);
+ ret = copy_iocb(nr, iocb, iocb64);
if (!ret)
ret = sys_io_submit(ctx_id, nr, iocb64);
return ret;
#define SMBFS_NAME "smbfs"
#define NCPFS_NAME "ncpfs"
-asmlinkage int compat_sys_mount(char __user * dev_name, char __user * dir_name,
- char __user * type, unsigned long flags,
- void __user * data)
+asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
+ char __user * type, unsigned long flags,
+ void __user * data)
{
unsigned long type_page;
unsigned long data_page;
return retval;
}
+static ssize_t compat_do_readv_writev(int type, struct file *file,
+ const struct compat_iovec __user *uvector,
+ unsigned long nr_segs, loff_t *pos)
+{
+ typedef ssize_t (*io_fn_t)(struct file *, char __user *, size_t, loff_t *);
+ typedef ssize_t (*iov_fn_t)(struct file *, const struct iovec *, unsigned long, loff_t *);
+
+ compat_ssize_t tot_len;
+ struct iovec iovstack[UIO_FASTIOV];
+ struct iovec *iov=iovstack, *vector;
+ ssize_t ret;
+ int seg;
+ io_fn_t fn;
+ iov_fn_t fnv;
+ struct inode *inode;
+
+ /*
+ * SuS says "The readv() function *may* fail if the iovcnt argument
+ * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
+ * traditionally returned zero for zero segments, so...
+ */
+ ret = 0;
+ if (nr_segs == 0)
+ goto out;
+
+ /*
+ * First get the "struct iovec" from user memory and
+ * verify all the pointers
+ */
+ ret = -EINVAL;
+ if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
+ goto out;
+ if (!file->f_op)
+ goto out;
+ if (nr_segs > UIO_FASTIOV) {
+ ret = -ENOMEM;
+ iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
+ if (!iov)
+ goto out;
+ }
+ ret = -EFAULT;
+ if (verify_area(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
+ goto out;
+
+ /*
+ * Single unix specification:
+ * We should -EINVAL if an element length is not >= 0 and fitting an
+ * ssize_t. The total length is fitting an ssize_t
+ *
+ * Be careful here because iov_len is a size_t not an ssize_t
+ */
+ tot_len = 0;
+ vector = iov;
+ ret = -EINVAL;
+ for (seg = 0 ; seg < nr_segs; seg++) {
+ compat_ssize_t tmp = tot_len;
+ compat_ssize_t len;
+ compat_uptr_t buf;
+
+ if (__get_user(len, &uvector->iov_len) ||
+ __get_user(buf, &uvector->iov_base)) {
+ ret = -EFAULT;
+ goto out;
+ }
+ if (len < 0) /* size_t not fitting an compat_ssize_t .. */
+ goto out;
+ tot_len += len;
+ if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
+ goto out;
+ vector->iov_base = compat_ptr(buf);
+ vector->iov_len = (compat_size_t) len;
+ uvector++;
+ vector++;
+ }
+ if (tot_len == 0) {
+ ret = 0;
+ goto out;
+ }
+
+ inode = file->f_dentry->d_inode;
+ /* VERIFY_WRITE actually means a read, as we write to user space */
+ ret = locks_verify_area((type == READ
+ ? FLOCK_VERIFY_READ : FLOCK_VERIFY_WRITE),
+ inode, file, *pos, tot_len);
+ if (ret)
+ goto out;
+
+ fnv = NULL;
+ if (type == READ) {
+ fn = file->f_op->read;
+ fnv = file->f_op->readv;
+ } else {
+ fn = (io_fn_t)file->f_op->write;
+ fnv = file->f_op->writev;
+ }
+ if (fnv) {
+ ret = fnv(file, iov, nr_segs, pos);
+ goto out;
+ }
+
+ /* Do it by hand, with file-ops */
+ ret = 0;
+ vector = iov;
+ while (nr_segs > 0) {
+ void __user * base;
+ size_t len;
+ ssize_t nr;
+
+ base = vector->iov_base;
+ len = vector->iov_len;
+ vector++;
+ nr_segs--;
+
+ nr = fn(file, base, len, pos);
+
+ if (nr < 0) {
+ if (!ret) ret = nr;
+ break;
+ }
+ ret += nr;
+ if (nr != len)
+ break;
+ }
+out:
+ if (iov != iovstack)
+ kfree(iov);
+ if ((ret + (type == READ)) > 0)
+ dnotify_parent(file->f_dentry,
+ (type == READ) ? DN_ACCESS : DN_MODIFY);
+ return ret;
+}
+
+asmlinkage ssize_t
+compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
+{
+ struct file *file;
+ ssize_t ret = -EBADF;
+
+ file = fget(fd);
+ if (!file)
+ return -EBADF;
+
+ if (!(file->f_mode & FMODE_READ))
+ goto out;
+
+ ret = -EINVAL;
+ if (!file->f_op || (!file->f_op->readv && !file->f_op->read))
+ goto out;
+
+ ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos);
+
+out:
+ fput(file);
+ return ret;
+}
+
+asmlinkage ssize_t
+compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
+{
+ struct file *file;
+ ssize_t ret = -EBADF;
+
+ file = fget(fd);
+ if (!file)
+ return -EBADF;
+ if (!(file->f_mode & FMODE_WRITE))
+ goto out;
+
+ ret = -EINVAL;
+ if (!file->f_op || (!file->f_op->writev && !file->f_op->write))
+ goto out;
+
+ ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos);
+
+out:
+ fput(file);
+ return ret;
+}
+
+/*
+ * compat_count() counts the number of arguments/envelopes. It is basically
+ * a copy of count() from fs/exec.c, except that it works with 32 bit argv
+ * and envp pointers.
+ */
+static int compat_count(compat_uptr_t __user *argv, int max)
+{
+ int i = 0;
+
+ if (argv != NULL) {
+ for (;;) {
+ compat_uptr_t p;
+
+ if (get_user(p, argv))
+ return -EFAULT;
+ if (!p)
+ break;
+ argv++;
+ if(++i > max)
+ return -E2BIG;
+ }
+ }
+ return i;
+}
+
+/*
+ * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
+ * except that it works with 32 bit argv and envp pointers.
+ */
+static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
+ struct linux_binprm *bprm)
+{
+ struct page *kmapped_page = NULL;
+ char *kaddr = NULL;
+ int ret;
+
+ while (argc-- > 0) {
+ compat_uptr_t str;
+ int len;
+ unsigned long pos;
+
+ if (get_user(str, argv+argc) ||
+ !(len = strnlen_user(compat_ptr(str), bprm->p))) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ if (bprm->p < len) {
+ ret = -E2BIG;
+ goto out;
+ }
+
+ bprm->p -= len;
+ /* XXX: add architecture specific overflow check here. */
+ pos = bprm->p;
+
+ while (len > 0) {
+ int i, new, err;
+ int offset, bytes_to_copy;
+ struct page *page;
+
+ offset = pos % PAGE_SIZE;
+ i = pos/PAGE_SIZE;
+ page = bprm->page[i];
+ new = 0;
+ if (!page) {
+ page = alloc_page(GFP_HIGHUSER);
+ bprm->page[i] = page;
+ if (!page) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ new = 1;
+ }
+
+ if (page != kmapped_page) {
+ if (kmapped_page)
+ kunmap(kmapped_page);
+ kmapped_page = page;
+ kaddr = kmap(kmapped_page);
+ }
+ if (new && offset)
+ memset(kaddr, 0, offset);
+ bytes_to_copy = PAGE_SIZE - offset;
+ if (bytes_to_copy > len) {
+ bytes_to_copy = len;
+ if (new)
+ memset(kaddr+offset+len, 0,
+ PAGE_SIZE-offset-len);
+ }
+ err = copy_from_user(kaddr+offset, compat_ptr(str),
+ bytes_to_copy);
+ if (err) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ pos += bytes_to_copy;
+ str += bytes_to_copy;
+ len -= bytes_to_copy;
+ }
+ }
+ ret = 0;
+out:
+ if (kmapped_page)
+ kunmap(kmapped_page);
+ return ret;
+}
+
+#ifdef CONFIG_MMU
+
+#define free_arg_pages(bprm) do { } while (0)
+
+#else
+
+static inline void free_arg_pages(struct linux_binprm *bprm)
+{
+ int i;
+
+ for (i = 0; i < MAX_ARG_PAGES; i++) {
+ if (bprm->page[i])
+ __free_page(bprm->page[i]);
+ bprm->page[i] = NULL;
+ }
+}
+
+#endif /* CONFIG_MMU */
+
+/*
+ * compat_do_execve() is mostly a copy of do_execve(), with the exception
+ * that it processes 32 bit argv and envp pointers.
+ */
+int compat_do_execve(char * filename,
+ compat_uptr_t __user *argv,
+ compat_uptr_t __user *envp,
+ struct pt_regs * regs)
+{
+ struct linux_binprm bprm;
+ struct file *file;
+ int retval;
+ int i;
+
+ sched_balance_exec();
+
+ file = open_exec(filename);
+
+ retval = PTR_ERR(file);
+ if (IS_ERR(file))
+ return retval;
+
+ bprm.p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *);
+ memset(bprm.page, 0, MAX_ARG_PAGES*sizeof(bprm.page[0]));
+
+ bprm.file = file;
+ bprm.filename = filename;
+ bprm.interp = filename;
+ bprm.sh_bang = 0;
+ bprm.loader = 0;
+ bprm.exec = 0;
+ bprm.security = NULL;
+ bprm.mm = mm_alloc();
+ retval = -ENOMEM;
+ if (!bprm.mm)
+ goto out_file;
+
+ retval = init_new_context(current, bprm.mm);
+ if (retval < 0)
+ goto out_mm;
+
+ bprm.argc = compat_count(argv, bprm.p / sizeof(compat_uptr_t));
+ if ((retval = bprm.argc) < 0)
+ goto out_mm;
+
+ bprm.envc = compat_count(envp, bprm.p / sizeof(compat_uptr_t));
+ if ((retval = bprm.envc) < 0)
+ goto out_mm;
+
+ retval = security_bprm_alloc(&bprm);
+ if (retval)
+ goto out;
+
+ retval = prepare_binprm(&bprm);
+ if (retval < 0)
+ goto out;
+
+ retval = copy_strings_kernel(1, &bprm.filename, &bprm);
+ if (retval < 0)
+ goto out;
+
+ bprm.exec = bprm.p;
+ retval = compat_copy_strings(bprm.envc, envp, &bprm);
+ if (retval < 0)
+ goto out;
+
+ retval = compat_copy_strings(bprm.argc, argv, &bprm);
+ if (retval < 0)
+ goto out;
+
+ retval = search_binary_handler(&bprm,regs);
+ if (retval >= 0) {
+ free_arg_pages(&bprm);
+
+ /* execve success */
+ security_bprm_free(&bprm);
+ return retval;
+ }
+
+out:
+ /* Something went wrong, return the inode and free the argument pages*/
+ for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
+ struct page * page = bprm.page[i];
+ if (page)
+ __free_page(page);
+ }
+
+ if (bprm.security)
+ security_bprm_free(&bprm);
+
+out_mm:
+ if (bprm.mm)
+ mmdrop(bprm.mm);
+
+out_file:
+ if (bprm.file) {
+ allow_write_access(bprm.file);
+ fput(bprm.file);
+ }
+
+ return retval;
+}
+
+#define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
+
+#define ROUND_UP(x,y) (((x)+(y)-1)/(y))
+
+/*
+ * Ooo, nasty. We need here to frob 32-bit unsigned longs to
+ * 64-bit unsigned longs.
+ */
+static inline
+int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
+ unsigned long *fdset)
+{
+ nr = ROUND_UP(nr, __COMPAT_NFDBITS);
+ if (ufdset) {
+ unsigned long odd;
+
+ if (verify_area(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
+ return -EFAULT;
+
+ odd = nr & 1UL;
+ nr &= ~1UL;
+ while (nr) {
+ unsigned long h, l;
+ __get_user(l, ufdset);
+ __get_user(h, ufdset+1);
+ ufdset += 2;
+ *fdset++ = h << 32 | l;
+ nr -= 2;
+ }
+ if (odd)
+ __get_user(*fdset, ufdset);
+ } else {
+ /* Tricky, must clear full unsigned long in the
+ * kernel fdset at the end, this makes sure that
+ * actually happens.
+ */
+ memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
+ }
+ return 0;
+}
+
+static inline
+void compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
+ unsigned long *fdset)
+{
+ unsigned long odd;
+ nr = ROUND_UP(nr, __COMPAT_NFDBITS);
+
+ if (!ufdset)
+ return;
+
+ odd = nr & 1UL;
+ nr &= ~1UL;
+ while (nr) {
+ unsigned long h, l;
+ l = *fdset++;
+ h = l >> 32;
+ __put_user(l, ufdset);
+ __put_user(h, ufdset+1);
+ ufdset += 2;
+ nr -= 2;
+ }
+ if (odd)
+ __put_user(*fdset, ufdset);
+}
+
+
+/*
+ * This is a virtual copy of sys_select from fs/select.c and probably
+ * should be compared to it from time to time
+ */
+static void *select_bits_alloc(int size)
+{
+ return kmalloc(6 * size, GFP_KERNEL);
+}
+
+static void select_bits_free(void *bits, int size)
+{
+ kfree(bits);
+}
+
+/*
+ * We can actually return ERESTARTSYS instead of EINTR, but I'd
+ * like to be certain this leads to no problems. So I return
+ * EINTR just for safety.
+ *
+ * Update: ERESTARTSYS breaks at least the xview clock binary, so
+ * I'm trying ERESTARTNOHAND which restart only when you want to.
+ */
+#define MAX_SELECT_SECONDS \
+ ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
+
+asmlinkage long
+compat_sys_select(int n, compat_ulong_t __user *inp, compat_ulong_t __user *outp,
+ compat_ulong_t __user *exp, struct compat_timeval __user *tvp)
+{
+ fd_set_bits fds;
+ char *bits;
+ long timeout;
+ int ret, size, max_fdset;
+
+ timeout = MAX_SCHEDULE_TIMEOUT;
+ if (tvp) {
+ time_t sec, usec;
+
+ if ((ret = verify_area(VERIFY_READ, tvp, sizeof(*tvp)))
+ || (ret = __get_user(sec, &tvp->tv_sec))
+ || (ret = __get_user(usec, &tvp->tv_usec)))
+ goto out_nofds;
+
+ ret = -EINVAL;
+ if (sec < 0 || usec < 0)
+ goto out_nofds;
+
+ if ((unsigned long) sec < MAX_SELECT_SECONDS) {
+ timeout = ROUND_UP(usec, 1000000/HZ);
+ timeout += sec * (unsigned long) HZ;
+ }
+ }
+
+ ret = -EINVAL;
+ if (n < 0)
+ goto out_nofds;
+
+ /* max_fdset can increase, so grab it once to avoid race */
+ max_fdset = current->files->max_fdset;
+ if (n > max_fdset)
+ n = max_fdset;
+
+ /*
+ * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
+ * since we used fdset we need to allocate memory in units of
+ * long-words.
+ */
+ ret = -ENOMEM;
+ size = FDS_BYTES(n);
+ bits = select_bits_alloc(size);
+ if (!bits)
+ goto out_nofds;
+ fds.in = (unsigned long *) bits;
+ fds.out = (unsigned long *) (bits + size);
+ fds.ex = (unsigned long *) (bits + 2*size);
+ fds.res_in = (unsigned long *) (bits + 3*size);
+ fds.res_out = (unsigned long *) (bits + 4*size);
+ fds.res_ex = (unsigned long *) (bits + 5*size);
+
+ if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
+ (ret = compat_get_fd_set(n, outp, fds.out)) ||
+ (ret = compat_get_fd_set(n, exp, fds.ex)))
+ goto out;
+ zero_fd_set(n, fds.res_in);
+ zero_fd_set(n, fds.res_out);
+ zero_fd_set(n, fds.res_ex);
+
+ ret = do_select(n, &fds, &timeout);
+
+ if (tvp && !(current->personality & STICKY_TIMEOUTS)) {
+ time_t sec = 0, usec = 0;
+ if (timeout) {
+ sec = timeout / HZ;
+ usec = timeout % HZ;
+ usec *= (1000000/HZ);
+ }
+ if (put_user(sec, &tvp->tv_sec) ||
+ put_user(usec, &tvp->tv_usec))
+ ret = -EFAULT;
+ }
+
+ if (ret < 0)
+ goto out;
+ if (!ret) {
+ ret = -ERESTARTNOHAND;
+ if (signal_pending(current))
+ goto out;
+ ret = 0;
+ }
+
+ compat_set_fd_set(n, inp, fds.res_in);
+ compat_set_fd_set(n, outp, fds.res_out);
+ compat_set_fd_set(n, exp, fds.res_ex);
+
+out:
+ select_bits_free(bits, size);
+out_nofds:
+ return ret;
+}
+
+#if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
+/* Stuff for NFS server syscalls... */
+struct compat_nfsctl_svc {
+ u16 svc32_port;
+ s32 svc32_nthreads;
+};
+
+struct compat_nfsctl_client {
+ s8 cl32_ident[NFSCLNT_IDMAX+1];
+ s32 cl32_naddr;
+ struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
+ s32 cl32_fhkeytype;
+ s32 cl32_fhkeylen;
+ u8 cl32_fhkey[NFSCLNT_KEYMAX];
+};
+
+struct compat_nfsctl_export {
+ char ex32_client[NFSCLNT_IDMAX+1];
+ char ex32_path[NFS_MAXPATHLEN+1];
+ compat_dev_t ex32_dev;
+ compat_ino_t ex32_ino;
+ compat_int_t ex32_flags;
+ compat_uid_t ex32_anon_uid;
+ compat_gid_t ex32_anon_gid;
+};
+
+struct compat_nfsctl_fdparm {
+ struct sockaddr gd32_addr;
+ s8 gd32_path[NFS_MAXPATHLEN+1];
+ compat_int_t gd32_version;
+};
+
+struct compat_nfsctl_fsparm {
+ struct sockaddr gd32_addr;
+ s8 gd32_path[NFS_MAXPATHLEN+1];
+ compat_int_t gd32_maxlen;
+};
+
+struct compat_nfsctl_arg {
+ compat_int_t ca32_version; /* safeguard */
+ union {
+ struct compat_nfsctl_svc u32_svc;
+ struct compat_nfsctl_client u32_client;
+ struct compat_nfsctl_export u32_export;
+ struct compat_nfsctl_fdparm u32_getfd;
+ struct compat_nfsctl_fsparm u32_getfs;
+ } u;
+#define ca32_svc u.u32_svc
+#define ca32_client u.u32_client
+#define ca32_export u.u32_export
+#define ca32_getfd u.u32_getfd
+#define ca32_getfs u.u32_getfs
+};
+
+union compat_nfsctl_res {
+ __u8 cr32_getfh[NFS_FHSIZE];
+ struct knfsd_fh cr32_getfs;
+};
+
+static int compat_nfs_svc_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
+{
+ int err;
+
+ err = access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc));
+ err |= get_user(karg->ca_version, &arg->ca32_version);
+ err |= __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port);
+ err |= __get_user(karg->ca_svc.svc_nthreads, &arg->ca32_svc.svc32_nthreads);
+ return (err) ? -EFAULT : 0;
+}
+
+static int compat_nfs_clnt_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
+{
+ int err;
+
+ err = access_ok(VERIFY_READ, &arg->ca32_client, sizeof(arg->ca32_client));
+ err |= get_user(karg->ca_version, &arg->ca32_version);
+ err |= __copy_from_user(&karg->ca_client.cl_ident[0],
+ &arg->ca32_client.cl32_ident[0],
+ NFSCLNT_IDMAX);
+ err |= __get_user(karg->ca_client.cl_naddr, &arg->ca32_client.cl32_naddr);
+ err |= __copy_from_user(&karg->ca_client.cl_addrlist[0],
+ &arg->ca32_client.cl32_addrlist[0],
+ (sizeof(struct in_addr) * NFSCLNT_ADDRMAX));
+ err |= __get_user(karg->ca_client.cl_fhkeytype,
+ &arg->ca32_client.cl32_fhkeytype);
+ err |= __get_user(karg->ca_client.cl_fhkeylen,
+ &arg->ca32_client.cl32_fhkeylen);
+ err |= __copy_from_user(&karg->ca_client.cl_fhkey[0],
+ &arg->ca32_client.cl32_fhkey[0],
+ NFSCLNT_KEYMAX);
+
+ return (err) ? -EFAULT : 0;
+}
+
+static int compat_nfs_exp_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
+{
+ int err;
+
+ err = access_ok(VERIFY_READ, &arg->ca32_export, sizeof(arg->ca32_export));
+ err |= get_user(karg->ca_version, &arg->ca32_version);
+ err |= __copy_from_user(&karg->ca_export.ex_client[0],
+ &arg->ca32_export.ex32_client[0],
+ NFSCLNT_IDMAX);
+ err |= __copy_from_user(&karg->ca_export.ex_path[0],
+ &arg->ca32_export.ex32_path[0],
+ NFS_MAXPATHLEN);
+ err |= __get_user(karg->ca_export.ex_dev,
+ &arg->ca32_export.ex32_dev);
+ err |= __get_user(karg->ca_export.ex_ino,
+ &arg->ca32_export.ex32_ino);
+ err |= __get_user(karg->ca_export.ex_flags,
+ &arg->ca32_export.ex32_flags);
+ err |= __get_user(karg->ca_export.ex_anon_uid,
+ &arg->ca32_export.ex32_anon_uid);
+ err |= __get_user(karg->ca_export.ex_anon_gid,
+ &arg->ca32_export.ex32_anon_gid);
+ SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
+ SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
+
+ return (err) ? -EFAULT : 0;
+}
+
+static int compat_nfs_getfd_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
+{
+ int err;
+
+ err = access_ok(VERIFY_READ, &arg->ca32_getfd, sizeof(arg->ca32_getfd));
+ err |= get_user(karg->ca_version, &arg->ca32_version);
+ err |= __copy_from_user(&karg->ca_getfd.gd_addr,
+ &arg->ca32_getfd.gd32_addr,
+ (sizeof(struct sockaddr)));
+ err |= __copy_from_user(&karg->ca_getfd.gd_path,
+ &arg->ca32_getfd.gd32_path,
+ (NFS_MAXPATHLEN+1));
+ err |= __get_user(karg->ca_getfd.gd_version,
+ &arg->ca32_getfd.gd32_version);
+
+ return (err) ? -EFAULT : 0;
+}
+
+static int compat_nfs_getfs_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
+{
+ int err;
+
+ err = access_ok(VERIFY_READ, &arg->ca32_getfs, sizeof(arg->ca32_getfs));
+ err |= get_user(karg->ca_version, &arg->ca32_version);
+ err |= __copy_from_user(&karg->ca_getfs.gd_addr,
+ &arg->ca32_getfs.gd32_addr,
+ (sizeof(struct sockaddr)));
+ err |= __copy_from_user(&karg->ca_getfs.gd_path,
+ &arg->ca32_getfs.gd32_path,
+ (NFS_MAXPATHLEN+1));
+ err |= __get_user(karg->ca_getfs.gd_maxlen,
+ &arg->ca32_getfs.gd32_maxlen);
+
+ return (err) ? -EFAULT : 0;
+}
+
+/* This really doesn't need translations, we are only passing
+ * back a union which contains opaque nfs file handle data.
+ */
+static int compat_nfs_getfh_res_trans(union nfsctl_res *kres, union compat_nfsctl_res __user *res)
+{
+ int err;
+
+ err = copy_to_user(res, kres, sizeof(*res));
+
+ return (err) ? -EFAULT : 0;
+}
+
+asmlinkage long compat_sys_nfsservctl(int cmd, struct compat_nfsctl_arg __user *arg,
+ union compat_nfsctl_res __user *res)
+{
+ struct nfsctl_arg *karg;
+ union nfsctl_res *kres;
+ mm_segment_t oldfs;
+ int err;
+
+ karg = kmalloc(sizeof(*karg), GFP_USER);
+ kres = kmalloc(sizeof(*kres), GFP_USER);
+ if(!karg || !kres) {
+ err = -ENOMEM;
+ goto done;
+ }
+
+ switch(cmd) {
+ case NFSCTL_SVC:
+ err = compat_nfs_svc_trans(karg, arg);
+ break;
+
+ case NFSCTL_ADDCLIENT:
+ err = compat_nfs_clnt_trans(karg, arg);
+ break;
+
+ case NFSCTL_DELCLIENT:
+ err = compat_nfs_clnt_trans(karg, arg);
+ break;
+
+ case NFSCTL_EXPORT:
+ case NFSCTL_UNEXPORT:
+ err = compat_nfs_exp_trans(karg, arg);
+ break;
+
+ case NFSCTL_GETFD:
+ err = compat_nfs_getfd_trans(karg, arg);
+ break;
+
+ case NFSCTL_GETFS:
+ err = compat_nfs_getfs_trans(karg, arg);
+ break;
+
+ default:
+ err = -EINVAL;
+ goto done;
+ }
+
+ oldfs = get_fs();
+ set_fs(KERNEL_DS);
+ /* The __user pointer casts are valid because of the set_fs() */
+ err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
+ set_fs(oldfs);
+
+ if (err)
+ goto done;
+
+ if((cmd == NFSCTL_GETFD) ||
+ (cmd == NFSCTL_GETFS))
+ err = compat_nfs_getfh_res_trans(kres, res);
+
+done:
+ kfree(karg);
+ kfree(kres);
+ return err;
+}
+#else /* !NFSD */
+long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
+{
+ return sys_ni_syscall();
+}
+#endif
git://git.onelab.eu / linux-2.6.git / blobdiff