diff options
| -rw-r--r-- | drivers/ieee1394/raw1394.c | 96 |
1 files changed, 91 insertions, 5 deletions
diff --git a/drivers/ieee1394/raw1394.c b/drivers/ieee1394/raw1394.c index b0523563991..19f26c5c947 100644 --- a/drivers/ieee1394/raw1394.c +++ b/drivers/ieee1394/raw1394.c @@ -42,6 +42,7 @@ #include <asm/uaccess.h> #include <asm/atomic.h> #include <linux/devfs_fs_kernel.h> +#include <linux/compat.h> #include "csr1212.h" #include "ieee1394.h" @@ -406,6 +407,65 @@ static void fcp_request(struct hpsb_host *host, int nodeid, int direction, queue_complete_req(req); } +#ifdef CONFIG_COMPAT +struct compat_raw1394_req { + __u32 type; + __s32 error; + __u32 misc; + + __u32 generation; + __u32 length; + + __u64 address; + + __u64 tag; + + __u64 sendb; + __u64 recvb; +} __attribute__((packed)); + +static const char __user *raw1394_compat_write(const char __user *buf) +{ + struct compat_raw1394_req __user *cr = (typeof(cr)) buf; + struct raw1394_request __user *r; + r = compat_alloc_user_space(sizeof(struct raw1394_request)); + +#define C(x) __copy_in_user(&r->x, &cr->x, sizeof(r->x)) + + if (copy_in_user(r, cr, sizeof(struct compat_raw1394_req)) || + C(address) || + C(tag) || + C(sendb) || + C(recvb)) + return ERR_PTR(-EFAULT); + return (const char __user *)r; +} +#undef C + +#define P(x) __put_user(r->x, &cr->x) + +static int +raw1394_compat_read(const char __user *buf, struct raw1394_request *r) +{ + struct compat_raw1394_req __user *cr = (typeof(cr)) r; + if (!access_ok(VERIFY_WRITE,cr,sizeof(struct compat_raw1394_req)) || + P(type) || + P(error) || + P(misc) || + P(generation) || + P(length) || + P(address) || + P(tag) || + P(sendb) || + P(recvb)) + return -EFAULT; + return sizeof(struct compat_raw1394_req); +} +#undef P + +#endif + + static ssize_t raw1394_read(struct file *file, char __user * buffer, size_t count, loff_t * offset_is_ignored) { @@ -415,6 +475,11 @@ static ssize_t raw1394_read(struct file *file, char __user * buffer, struct pending_request *req; ssize_t ret; +#ifdef CONFIG_COMPAT + if (count == sizeof(struct compat_raw1394_req)) { + /* ok */ + } else +#endif if (count != sizeof(struct raw1394_request)) { return -EINVAL; } @@ -446,12 +511,22 @@ static ssize_t raw1394_read(struct file *file, char __user * buffer, req->req.error = RAW1394_ERROR_MEMFAULT; } } - if (copy_to_user(buffer, &req->req, sizeof(req->req))) { - ret = -EFAULT; - goto out; - } - ret = (ssize_t) sizeof(struct raw1394_request); +#ifdef CONFIG_COMPAT + if (count == sizeof(struct compat_raw1394_req) && + sizeof(struct compat_raw1394_req) != + sizeof(struct raw1394_request)) { + ret = raw1394_compat_read(buffer, &req->req); + + } else +#endif + { + if (copy_to_user(buffer, &req->req, sizeof(req->req))) { + ret = -EFAULT; + goto out; + } + ret = (ssize_t) sizeof(struct raw1394_request); + } out: free_pending_request(req); return ret; @@ -2274,6 +2349,7 @@ static int state_connected(struct file_info *fi, struct pending_request *req) return handle_async_request(fi, req, node); } + static ssize_t raw1394_write(struct file *file, const char __user * buffer, size_t count, loff_t * offset_is_ignored) { @@ -2281,6 +2357,15 @@ static ssize_t raw1394_write(struct file *file, const char __user * buffer, struct pending_request *req; ssize_t retval = 0; +#ifdef CONFIG_COMPAT + if (count == sizeof(struct compat_raw1394_req) && + sizeof(struct compat_raw1394_req) != + sizeof(struct raw1394_request)) { + buffer = raw1394_compat_write(buffer); + if (IS_ERR(buffer)) + return PTR_ERR(buffer); + } else +#endif if (count != sizeof(struct raw1394_request)) { return -EINVAL; } @@ -2893,6 +2978,7 @@ static struct file_operations raw1394_fops = { .write = raw1394_write, .mmap = raw1394_mmap, .ioctl = raw1394_ioctl, + // .compat_ioctl = ... someone needs to do this .poll = raw1394_poll, .open = raw1394_open, .release = raw1394_release, |