diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/compat.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/compat.c b/fs/compat.c index 2e32bd340474..3f3e8f4d43d6 100644 --- a/fs/compat.c +++ b/fs/compat.c @@ -1317,6 +1317,26 @@ out: return ret; } +asmlinkage long +compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32, + unsigned int nr_segs, unsigned int flags) +{ + unsigned i; + struct iovec *iov; + if (nr_segs >= UIO_MAXIOV) + return -EINVAL; + iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec)); + for (i = 0; i < nr_segs; i++) { + struct compat_iovec v; + if (get_user(v.iov_base, &iov32[i].iov_base) || + get_user(v.iov_len, &iov32[i].iov_len) || + put_user(compat_ptr(v.iov_base), &iov[i].iov_base) || + put_user(v.iov_len, &iov[i].iov_len)) + return -EFAULT; + } + return sys_vmsplice(fd, iov, nr_segs, flags); +} + /* * Exactly like fs/open.c:sys_open(), except that it doesn't set the * O_LARGEFILE flag. |