summaryrefslogtreecommitdiffstats
path: root/drivers/char/ipmi/ipmi_devintf.c
diff options
context:
space:
mode:
authorAl Viro <viro@zeniv.linux.org.uk>2017-06-26 23:02:54 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2017-06-26 23:02:54 +0200
commite5f699d443192001613df21f123c5c3483e55888 (patch)
tree4d4e8211ddf0c82c8bf124343715d1817ac6ebf6 /drivers/char/ipmi/ipmi_devintf.c
parentipmi: get COMPAT_IPMICTL_RECEIVE_MSG in sync with the native one (diff)
downloadlinux-e5f699d443192001613df21f123c5c3483e55888.tar.xz
linux-e5f699d443192001613df21f123c5c3483e55888.zip
ipmi: get rid of field-by-field __get_user()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'drivers/char/ipmi/ipmi_devintf.c')
-rw-r--r--drivers/char/ipmi/ipmi_devintf.c87
1 files changed, 37 insertions, 50 deletions
diff --git a/drivers/char/ipmi/ipmi_devintf.c b/drivers/char/ipmi/ipmi_devintf.c
index 7007beba918b..2ffca4232686 100644
--- a/drivers/char/ipmi/ipmi_devintf.c
+++ b/drivers/char/ipmi/ipmi_devintf.c
@@ -704,62 +704,41 @@ struct compat_ipmi_req_settime {
/*
* Define some helper functions for copying IPMI data
*/
-static long get_compat_ipmi_msg(struct ipmi_msg *p64,
- struct compat_ipmi_msg __user *p32)
+static void get_compat_ipmi_msg(struct ipmi_msg *p64,
+ struct compat_ipmi_msg *p32)
{
- compat_uptr_t tmp;
-
- if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) ||
- __get_user(p64->netfn, &p32->netfn) ||
- __get_user(p64->cmd, &p32->cmd) ||
- __get_user(p64->data_len, &p32->data_len) ||
- __get_user(tmp, &p32->data))
- return -EFAULT;
- p64->data = compat_ptr(tmp);
- return 0;
+ p64->netfn = p32->netfn;
+ p64->cmd = p32->cmd;
+ p64->data_len = p32->data_len;
+ p64->data = compat_ptr(p32->data);
}
-static long get_compat_ipmi_req(struct ipmi_req *p64,
- struct compat_ipmi_req __user *p32)
+static void get_compat_ipmi_req(struct ipmi_req *p64,
+ struct compat_ipmi_req *p32)
{
-
- compat_uptr_t tmp;
-
- if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) ||
- __get_user(tmp, &p32->addr) ||
- __get_user(p64->addr_len, &p32->addr_len) ||
- __get_user(p64->msgid, &p32->msgid) ||
- get_compat_ipmi_msg(&p64->msg, &p32->msg))
- return -EFAULT;
- p64->addr = compat_ptr(tmp);
- return 0;
+ p64->addr = compat_ptr(p32->addr);
+ p64->addr_len = p32->addr_len;
+ p64->msgid = p32->msgid;
+ get_compat_ipmi_msg(&p64->msg, &p32->msg);
}
-static long get_compat_ipmi_req_settime(struct ipmi_req_settime *p64,
- struct compat_ipmi_req_settime __user *p32)
+static void get_compat_ipmi_req_settime(struct ipmi_req_settime *p64,
+ struct compat_ipmi_req_settime *p32)
{
- if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) ||
- get_compat_ipmi_req(&p64->req, &p32->req) ||
- __get_user(p64->retries, &p32->retries) ||
- __get_user(p64->retry_time_ms, &p32->retry_time_ms))
- return -EFAULT;
- return 0;
+ get_compat_ipmi_req(&p64->req, &p32->req);
+ p64->retries = p32->retries;
+ p64->retry_time_ms = p32->retry_time_ms;
}
-static long get_compat_ipmi_recv(struct ipmi_recv *p64,
- struct compat_ipmi_recv __user *p32)
+static void get_compat_ipmi_recv(struct ipmi_recv *p64,
+ struct compat_ipmi_recv *p32)
{
- compat_uptr_t tmp;
-
- if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) ||
- __get_user(p64->recv_type, &p32->recv_type) ||
- __get_user(tmp, &p32->addr) ||
- __get_user(p64->addr_len, &p32->addr_len) ||
- __get_user(p64->msgid, &p32->msgid) ||
- get_compat_ipmi_msg(&p64->msg, &p32->msg))
- return -EFAULT;
- p64->addr = compat_ptr(tmp);
- return 0;
+ memset(p64, 0, sizeof(struct ipmi_recv));
+ p64->recv_type = p32->recv_type;
+ p64->addr = compat_ptr(p32->addr);
+ p64->addr_len = p32->addr_len;
+ p64->msgid = p32->msgid;
+ get_compat_ipmi_msg(&p64->msg, &p32->msg);
}
static int copyout_recv32(struct ipmi_recv *p64, void __user *to)
@@ -789,10 +768,13 @@ static long compat_ipmi_ioctl(struct file *filep, unsigned int cmd,
case COMPAT_IPMICTL_SEND_COMMAND:
{
struct ipmi_req rp;
+ struct compat_ipmi_req r32;
- if (get_compat_ipmi_req(&rp, compat_ptr(arg)))
+ if (copy_from_user(&r32, compat_ptr(arg), sizeof(r32)))
return -EFAULT;
+ get_compat_ipmi_req(&rp, &r32);
+
return handle_send_req(priv->user, &rp,
priv->default_retries,
priv->default_retry_time_ms);
@@ -800,10 +782,13 @@ static long compat_ipmi_ioctl(struct file *filep, unsigned int cmd,
case COMPAT_IPMICTL_SEND_COMMAND_SETTIME:
{
struct ipmi_req_settime sp;
+ struct compat_ipmi_req_settime sp32;
- if (get_compat_ipmi_req_settime(&sp, compat_ptr(arg)))
+ if (copy_from_user(&sp32, compat_ptr(arg), sizeof(sp32)))
return -EFAULT;
+ get_compat_ipmi_req_settime(&sp, &sp32);
+
return handle_send_req(priv->user, &sp.req,
sp.retries, sp.retry_time_ms);
}
@@ -811,11 +796,13 @@ static long compat_ipmi_ioctl(struct file *filep, unsigned int cmd,
case COMPAT_IPMICTL_RECEIVE_MSG_TRUNC:
{
struct ipmi_recv recv64;
+ struct compat_ipmi_recv recv32;
- memset(&recv64, 0, sizeof(recv64));
- if (get_compat_ipmi_recv(&recv64, compat_ptr(arg)))
+ if (copy_from_user(&recv32, compat_ptr(arg), sizeof(recv32)))
return -EFAULT;
+ get_compat_ipmi_recv(&recv64, &recv32);
+
return handle_recv(priv,
cmd == COMPAT_IPMICTL_RECEIVE_MSG_TRUNC,
&recv64, copyout_recv32, compat_ptr(arg));