diff options
| author |   Al Viro <viro@zeniv.linux.org.uk> | 2020-05-10 17:34:20 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2020-05-20 20:31:34 -0400 |
| commit | a3929484af75ee524419edbbc4e9ce012c3d67c9 (patch) | |
| tree | 3d9a07871d1f21d67790aff524f61b1085c14057 /net/atm | |
| parent | atm: separate ATM_GETNAMES handling from the rest of atm_dev_ioctl() (diff) | |
| download | linux-dev-a3929484af75ee524419edbbc4e9ce012c3d67c9.tar.xz linux-dev-a3929484af75ee524419edbbc4e9ce012c3d67c9.zip | |
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.c | 19 | ||||
| -rw-r--r-- | net/atm/resources.c | 19 | ||||
| -rw-r--r-- | net/atm/resources.h | 2 |
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); |