@@ -1436,13 +1436,7 @@ static void xfrm_policy_requeue(struct xfrm_policy *old,
static bool xfrm_policy_mark_match(struct xfrm_policy *policy,
struct xfrm_policy *pol)
{
- u32 mark = policy->mark.v & policy->mark.m;
-
- if (policy->mark.v == pol->mark.v && policy->mark.m == pol->mark.m)
- return true;
-
- if ((mark & pol->mark.m) == pol->mark.v &&
- policy->priority == pol->priority)
+ if ((policy->mark.v & policy->mark.m) == (pol->mark.v & pol->mark.m))
return true;
return false;
@@ -1628,7 +1622,7 @@ int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl)
hlist_for_each_entry(pol, chain, bydst) {
if (pol->type == type &&
pol->if_id == if_id &&
- (mark & pol->mark.m) == pol->mark.v &&
+ mark == (pol->mark.m & pol->mark.v) &&
!selector_cmp(sel, &pol->selector) &&
xfrm_sec_ctx_match(ctx, pol->security))
return pol;
@@ -1726,7 +1720,7 @@ struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u32 if_id,
hlist_for_each_entry(pol, chain, byidx) {
if (pol->type == type && pol->index == id &&
pol->if_id == if_id &&
- (mark & pol->mark.m) == pol->mark.v) {
+ mark == (pol->mark.m & pol->mark.v)) {
xfrm_pol_hold(pol);
if (delete) {
*err = security_xfrm_policy_delete(
@@ -1898,7 +1892,7 @@ static int xfrm_policy_match(const struct xfrm_policy *pol,
if (pol->family != family ||
pol->if_id != if_id ||
- (fl->flowi_mark & pol->mark.m) != pol->mark.v ||
+ fl->flowi_mark != (pol->mark.m & pol->mark.v) ||
pol->type != type)
return ret;
@@ -2177,7 +2171,7 @@ static struct xfrm_policy *xfrm_sk_policy_lookup(const struct sock *sk, int dir,
match = xfrm_selector_match(&pol->selector, fl, family);
if (match) {
- if ((sk->sk_mark & pol->mark.m) != pol->mark.v ||
+ if (sk->sk_mark != (pol->mark.m & pol->mark.v) ||
pol->if_id != if_id) {
pol = NULL;
goto out;
While update xfrm policy as follow: ip -6 xfrm policy update src fd00::1/128 dst fd00::2/128 dir in \ priority 1 mark 0 mask 0x10 ip -6 xfrm policy update src fd00::1/128 dst fd00::2/128 dir in \ priority 2 mark 0 mask 0x00 ip -6 xfrm policy update src fd00::1/128 dst fd00::2/128 dir in \ priority 2 mark 0 mask 0x10 We get this warning: WARNING: CPU: 0 PID: 4808 at net/xfrm/xfrm_policy.c:1548 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 4808 Comm: ip Not tainted 5.7.0-rc1+ #151 Call Trace: RIP: 0010:xfrm_policy_insert_list+0x153/0x1e0 xfrm_policy_inexact_insert+0x70/0x330 xfrm_policy_insert+0x1df/0x250 xfrm_add_policy+0xcc/0x190 [xfrm_user] xfrm_user_rcv_msg+0x1d1/0x1f0 [xfrm_user] netlink_rcv_skb+0x4c/0x120 xfrm_netlink_rcv+0x32/0x40 [xfrm_user] netlink_unicast+0x1b3/0x270 netlink_sendmsg+0x350/0x470 sock_sendmsg+0x4f/0x60 Policy C and policy A has the same mark.v and mark.m, so policy A is matched in first round lookup while updating C. However policy C and policy B has same mark and priority, which also leads to matched. So the WARN_ON is triggered. xfrm policy lookup should only be matched when the found policy has the same lookup keys (mark.v & mark.m) no matter priority. Fixes: 7cb8a93968e3 ("xfrm: Allow inserting policies with matching mark and different priorities") Signed-off-by: YueHaibing <yuehaibing@huawei.com> --- net/xfrm/xfrm_policy.c | 16 +++++----------- 1 file changed, 5 insertions(+), 11 deletions(-)