netfilter: x_tables: assert minimum target size
commit a08e4e190b866579896c09af59b3bdca821da2cd upstream. The target size includes the size of the xt_entry_target struct. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
6bc803b795
commit
ed30e07de0
1 changed files with 3 additions and 0 deletions
|
@ -567,6 +567,9 @@ int xt_check_entry_offsets(const void *base,
|
|||
return -EINVAL;
|
||||
|
||||
t = (void *)(e + target_offset);
|
||||
if (t->u.target_size < sizeof(*t))
|
||||
return -EINVAL;
|
||||
|
||||
if (target_offset + t->u.target_size > next_offset)
|
||||
return -EINVAL;
|
||||
|
||||
|
|
Loading…
Add table
Reference in a new issue