提交 7800007c 编写于 作者: P Patrick McHardy 提交者: David S. Miller

[NETFILTER]: x_tables: don't use __copy_{from,to}_user on unchecked memory in compat layer

Noticed by Linus Torvalds <torvalds@osdl.org>
Signed-off-by: NPatrick McHardy <kaber@trash.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 7582e9d1
......@@ -1441,7 +1441,7 @@ static int compat_copy_entry_to_user(struct ipt_entry *e,
ret = -EFAULT;
origsize = *size;
ce = (struct compat_ipt_entry __user *)*dstptr;
if (__copy_to_user(ce, e, sizeof(struct ipt_entry)))
if (copy_to_user(ce, e, sizeof(struct ipt_entry)))
goto out;
*dstptr += sizeof(struct compat_ipt_entry);
......@@ -1459,9 +1459,9 @@ static int compat_copy_entry_to_user(struct ipt_entry *e,
goto out;
ret = -EFAULT;
next_offset = e->next_offset - (origsize - *size);
if (__put_user(target_offset, &ce->target_offset))
if (put_user(target_offset, &ce->target_offset))
goto out;
if (__put_user(next_offset, &ce->next_offset))
if (put_user(next_offset, &ce->next_offset))
goto out;
return 0;
out:
......
......@@ -289,7 +289,7 @@ int xt_compat_match(void *match, void **dstptr, int *size, int convert)
case COMPAT_TO_USER:
pm = (struct xt_entry_match *)match;
msize = pm->u.user.match_size;
if (__copy_to_user(*dstptr, pm, msize)) {
if (copy_to_user(*dstptr, pm, msize)) {
ret = -EFAULT;
break;
}
......@@ -366,7 +366,7 @@ int xt_compat_target(void *target, void **dstptr, int *size, int convert)
case COMPAT_TO_USER:
pt = (struct xt_entry_target *)target;
tsize = pt->u.user.target_size;
if (__copy_to_user(*dstptr, pt, tsize)) {
if (copy_to_user(*dstptr, pt, tsize)) {
ret = -EFAULT;
break;
}
......
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