Commit 1a983a4e14c6 for kernel

commit 1a983a4e14c635c40354be110cd9a1a5c94e01e6
Author: Sang-Hoon Choi <csh0052@gmail.com>
Date:   Tue Sep 22 03:15:59 2026 +0900

    nfp: hold IPsec RX state under the XArray lock

    nfp_net_ipsec_rx() drops the XArray lock before taking a reference to the
    xfrm_state it found. The delete path can erase the entry and drop the last
    state reference in that interval. RX can then try to increment a zero
    refcount after the state has been queued for destruction.

    The driver queues firmware invalidation asynchronously; the delete path
    does not wait for the command to complete or drain pending RX processing.

    The XFRM garbage collector waits for an RCU grace period before freeing
    the state. That delays reclamation but does not make acquiring a reference
    from zero valid.

    Take the xfrm_state reference before releasing the XArray lock so
    xa_erase() cannot run between lookup and reference acquisition.

    Fixes: 57f273adbcd4 ("nfp: add framework to support ipsec offloading")
    Reported-by: Changyul Lee <lcy8047@gmail.com>
    Signed-off-by: Sang-Hoon Choi <csh0052@gmail.com>
    Link: https://patch.msgid.link/179001455912.44752.17153022439349797877.idr-bug-92@gmail.com
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/netronome/nfp/crypto/ipsec.c b/drivers/net/ethernet/netronome/nfp/crypto/ipsec.c
index 9e7c285eaa6b..960d7513aa8d 100644
--- a/drivers/net/ethernet/netronome/nfp/crypto/ipsec.c
+++ b/drivers/net/ethernet/netronome/nfp/crypto/ipsec.c
@@ -625,11 +625,12 @@ int nfp_net_ipsec_rx(struct nfp_meta_parsed *meta, struct sk_buff *skb)

 	xa_lock(&nn->xa_ipsec);
 	x = xa_load(&nn->xa_ipsec, saidx);
+	if (x)
+		xfrm_state_hold(x);
 	xa_unlock(&nn->xa_ipsec);
 	if (!x)
 		return -EINVAL;

-	xfrm_state_hold(x);
 	sp->xvec[sp->len++] = x;
 	sp->olen++;
 	xo = xfrm_offload(skb);