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xfrm: check all hash buckets for leftover states during netns deletion

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The current hlist_empty checks only test the first bucket of each
hashtable, ignoring any other bucket. They should be caught by the
WARN_ON for state_all, but better to make all the checks accurate.

Fixes: 73d189dce4 ("netns xfrm: per-netns xfrm_state_bydst hash")
Fixes: d320bbb306 ("netns xfrm: per-netns xfrm_state_bysrc hash")
Fixes: b754a4fd8f ("netns xfrm: per-netns xfrm_state_byspi hash")
Fixes: fe9f1d8779 ("xfrm: add state hashtable keyed by seq")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Sabrina Dubroca
2025-10-16 12:39:17 +02:00
committed by Steffen Klassert
parent 1dcf617bec
commit f2bc8231fd
1 changed files with 8 additions and 4 deletions
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12
net/xfrm/xfrm_state.c
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@@ -3308,6 +3308,7 @@ out_bydst:
void xfrm_state_fini(struct net *net)
{
unsigned int sz;
int i;
flush_work(&net->xfrm.state_hash_work);
xfrm_state_flush(net, 0, false);
@@ -3315,14 +3316,17 @@ void xfrm_state_fini(struct net *net)
WARN_ON(!list_empty(&net->xfrm.state_all));
for (i = 0; i <= net->xfrm.state_hmask; i++) {
WARN_ON(!hlist_empty(net->xfrm.state_byseq + i));
WARN_ON(!hlist_empty(net->xfrm.state_byspi + i));
WARN_ON(!hlist_empty(net->xfrm.state_bysrc + i));
WARN_ON(!hlist_empty(net->xfrm.state_bydst + i));
}
sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head);
WARN_ON(!hlist_empty(net->xfrm.state_byseq));
xfrm_hash_free(net->xfrm.state_byseq, sz);
WARN_ON(!hlist_empty(net->xfrm.state_byspi));
xfrm_hash_free(net->xfrm.state_byspi, sz);
WARN_ON(!hlist_empty(net->xfrm.state_bysrc));
xfrm_hash_free(net->xfrm.state_bysrc, sz);
WARN_ON(!hlist_empty(net->xfrm.state_bydst));
xfrm_hash_free(net->xfrm.state_bydst, sz);
free_percpu(net->xfrm.state_cache_input);
}