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authorAl Viro <viro@zeniv.linux.org.uk>2020-05-10 17:34:20 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2020-05-20 20:31:34 -0400
commita3929484af75ee524419edbbc4e9ce012c3d67c9 (patch)
tree3d9a07871d1f21d67790aff524f61b1085c14057 /net/atm
parent8c2348e36af0da79477b0726781da297263269a4 (diff)
atm: move copyin from atm_getnames() into the caller
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'net/atm')
-rw-r--r--net/atm/ioctl.c19
-rw-r--r--net/atm/resources.c19
-rw-r--r--net/atm/resources.h2
3 files changed, 20 insertions, 20 deletions
diff --git a/net/atm/ioctl.c b/net/atm/ioctl.c
index 0b4b07740fe4..e239cebf48da 100644
--- a/net/atm/ioctl.c
+++ b/net/atm/ioctl.c
@@ -56,6 +56,8 @@ static int do_vcc_ioctl(struct socket *sock, unsigned int cmd,
int error;
struct list_head *pos;
void __user *argp = (void __user *)arg;
+ void __user *buf;
+ int __user *len;
vcc = ATM_SD(sock);
switch (cmd) {
@@ -163,7 +165,22 @@ static int do_vcc_ioctl(struct socket *sock, unsigned int cmd,
goto done;
if (cmd == ATM_GETNAMES) {
- error = atm_getnames(argp, compat);
+ if (IS_ENABLED(CONFIG_COMPAT) && compat) {
+#ifdef CONFIG_COMPAT
+ struct compat_atm_iobuf __user *ciobuf = argp;
+ compat_uptr_t cbuf;
+ len = &ciobuf->length;
+ if (get_user(cbuf, &ciobuf->buffer))
+ return -EFAULT;
+ buf = compat_ptr(cbuf);
+#endif
+ } else {
+ struct atm_iobuf __user *iobuf = argp;
+ len = &iobuf->length;
+ if (get_user(buf, &iobuf->buffer))
+ return -EFAULT;
+ }
+ error = atm_getnames(buf, len);
} else {
error = atm_dev_ioctl(cmd, argp, compat);
}
diff --git a/net/atm/resources.c b/net/atm/resources.c
index a2ab75929eec..5507cc608969 100644
--- a/net/atm/resources.c
+++ b/net/atm/resources.c
@@ -193,30 +193,13 @@ static int fetch_stats(struct atm_dev *dev, struct atm_dev_stats __user *arg,
return error ? -EFAULT : 0;
}
-int atm_getnames(void __user *arg, int compat)
+int atm_getnames(void __user *buf, int __user *iobuf_len)
{
- void __user *buf;
int error, len, size = 0;
struct atm_dev *dev;
struct list_head *p;
int *tmp_buf, *tmp_p;
- int __user *iobuf_len;
- if (IS_ENABLED(CONFIG_COMPAT) && compat) {
-#ifdef CONFIG_COMPAT
- struct compat_atm_iobuf __user *ciobuf = arg;
- compat_uptr_t cbuf;
- iobuf_len = &ciobuf->length;
- if (get_user(cbuf, &ciobuf->buffer))
- return -EFAULT;
- buf = compat_ptr(cbuf);
-#endif
- } else {
- struct atm_iobuf __user *iobuf = arg;
- iobuf_len = &iobuf->length;
- if (get_user(buf, &iobuf->buffer))
- return -EFAULT;
- }
if (get_user(len, iobuf_len))
return -EFAULT;
mutex_lock(&atm_dev_mutex);
diff --git a/net/atm/resources.h b/net/atm/resources.h
index 18f8e5948ce4..5e2c68d37d63 100644
--- a/net/atm/resources.h
+++ b/net/atm/resources.h
@@ -14,7 +14,7 @@
extern struct list_head atm_devs;
extern struct mutex atm_dev_mutex;
-int atm_getnames(void __user *arg, int compat);
+int atm_getnames(void __user *buf, int __user *iobuf_len);
int atm_dev_ioctl(unsigned int cmd, void __user *arg, int compat);