diff options
| author | Pavel Skripkin <paskripkin@gmail.com> | 2021-07-28 19:38:18 +0300 |
|---|---|---|
| committer | Steffen Klassert <steffen.klassert@secunet.com> | 2021-07-29 08:04:10 +0200 |
| commit | 5d8dbb7fb82b8661c16d496644b931c0e2e3a12e (patch) | |
| tree | 5c572c0adfa04517c87e64c38c570bb0694e3f8e /include/uapi/linux/xfrm.h | |
| parent | 2d151d39073aff498358543801fca0f670fea981 (diff) | |
net: xfrm: fix shift-out-of-bounce
We need to check up->dirmask to avoid shift-out-of-bounce bug,
since up->dirmask comes from userspace.
Also, added XFRM_USERPOLICY_DIRMASK_MAX constant to uapi to inform
user-space that up->dirmask has maximum possible value
Fixes: 2d151d39073a ("xfrm: Add possibility to set the default to block if we have no policy")
Reported-and-tested-by: syzbot+9cd5837a045bbee5b810@syzkaller.appspotmail.com
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'include/uapi/linux/xfrm.h')
| -rw-r--r-- | include/uapi/linux/xfrm.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/xfrm.h b/include/uapi/linux/xfrm.h index 6e8095106192..b96c1ea7166d 100644 --- a/include/uapi/linux/xfrm.h +++ b/include/uapi/linux/xfrm.h @@ -514,6 +514,7 @@ struct xfrm_user_offload { #define XFRM_OFFLOAD_INBOUND 2 struct xfrm_userpolicy_default { +#define XFRM_USERPOLICY_DIRMASK_MAX (sizeof(__u8) * 8) __u8 dirmask; __u8 action; }; |