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[PATCH OLK-6.6 0/3] CVE-2025-38491
by Zhang Changzhong 07 Feb '26

07 Feb '26

Paolo Abeni (3): mptcp: make fallback action and fallback decision atomic mptcp: plug races between subflow fail and subflow creation mptcp: avoid deadlock on fallback while reinjecting net/mptcp/options.c | 3 ++- net/mptcp/pm.c | 8 +++++++- net/mptcp/protocol.c | 50 ++++++++++++++++++++++++++++++++++++++++++-------- net/mptcp/protocol.h | 29 ++++++++++++++++++++++------- net/mptcp/subflow.c | 30 +++++++++++++++++++----------- 5 files changed, 92 insertions(+), 28 deletions(-) -- 2.9.5

2 4

[PATCH OLK-6.6 0/5] CVE-2025-39948
by Zhang Changzhong 07 Feb '26

07 Feb '26

Jacob Keller (1): ice: fix Rx page leak on multi-buffer frames Larysa Zaremba (1): ice: Introduce ice_xdp_buff Maciej Fijalkowski (2): ice: gather page_count()'s of each frag right before XDP prog call ice: stop storing XDP verdict within ice_rx_buf Michal Kubiak (1): ice: fix incorrect counter for buffer allocation failures drivers/net/ethernet/intel/ice/ice_txrx.c | 122 ++++++++++++++++---------- drivers/net/ethernet/intel/ice/ice_txrx.h | 20 +++-- drivers/net/ethernet/intel/ice/ice_txrx_lib.h | 53 +++-------- 3 files changed, 99 insertions(+), 96 deletions(-) -- 2.9.5

2 6

[PATCH OLK-6.6] netfilter: ctnetlink: remove refcounting in expectation dumpers
by Zhang Changzhong 07 Feb '26

07 Feb '26

From: Florian Westphal <fw(a)strlen.de> mainline inclusion from mainline-v6.17-rc2 commit 1492e3dcb2be3aa46d1963da96aa9593e4e4db5a category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/8961 CVE: CVE-2025-39764 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- Same pattern as previous patch: do not keep the expectation object alive via refcount, only store a cookie value and then use that as the skip hint for dump resumption. AFAICS this has the same issue as the one resolved in the conntrack dumper, when we do if (!refcount_inc_not_zero(&exp->use)) to increment the refcount, there is a chance that exp == last, which causes a double-increment of the refcount and subsequent memory leak. Fixes: cf6994c2b981 ("[NETFILTER]: nf_conntrack_netlink: sync expectation dumping with conntrack table dumping") Fixes: e844a928431f ("netfilter: ctnetlink: allow to dump expectation per master conntrack") Signed-off-by: Florian Westphal <fw(a)strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo(a)netfilter.org> Signed-off-by: Wang Liang <wangliang74(a)huawei.com> Signed-off-by: Zhang Changzhong <zhangchangzhong(a)huawei.com> --- net/netfilter/nf_conntrack_netlink.c | 41 +++++++++++++++--------------------- 1 file changed, 17 insertions(+), 24 deletions(-) diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index 282e964..698e79c 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -3138,23 +3138,27 @@ ctnetlink_expect_event(unsigned int events, const struct nf_exp_event *item) return 0; } #endif -static int ctnetlink_exp_done(struct netlink_callback *cb) + +static unsigned long ctnetlink_exp_id(const struct nf_conntrack_expect *exp) { - if (cb->args[1]) - nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); - return 0; + unsigned long id = (unsigned long)exp; + + id += nf_ct_get_id(exp->master); + id += exp->class; + + return id ? id : 1; } static int ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) { struct net *net = sock_net(skb->sk); - struct nf_conntrack_expect *exp, *last; struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); u_int8_t l3proto = nfmsg->nfgen_family; + unsigned long last_id = cb->args[1]; + struct nf_conntrack_expect *exp; rcu_read_lock(); - last = (struct nf_conntrack_expect *)cb->args[1]; for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { restart: hlist_for_each_entry_rcu(exp, &nf_ct_expect_hash[cb->args[0]], @@ -3166,7 +3170,7 @@ ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) continue; if (cb->args[1]) { - if (exp != last) + if (ctnetlink_exp_id(exp) != last_id) continue; cb->args[1] = 0; } @@ -3175,9 +3179,7 @@ ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) cb->nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp) < 0) { - if (!refcount_inc_not_zero(&exp->use)) - continue; - cb->args[1] = (unsigned long)exp; + cb->args[1] = ctnetlink_exp_id(exp); goto out; } } @@ -3188,32 +3190,30 @@ ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) } out: rcu_read_unlock(); - if (last) - nf_ct_expect_put(last); - return skb->len; } static int ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb) { - struct nf_conntrack_expect *exp, *last; struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); struct nf_conn *ct = cb->data; struct nf_conn_help *help = nfct_help(ct); u_int8_t l3proto = nfmsg->nfgen_family; + unsigned long last_id = cb->args[1]; + struct nf_conntrack_expect *exp; if (cb->args[0]) return 0; rcu_read_lock(); - last = (struct nf_conntrack_expect *)cb->args[1]; + restart: hlist_for_each_entry_rcu(exp, &help->expectations, lnode) { if (l3proto && exp->tuple.src.l3num != l3proto) continue; if (cb->args[1]) { - if (exp != last) + if (ctnetlink_exp_id(exp) != last_id) continue; cb->args[1] = 0; } @@ -3221,9 +3221,7 @@ ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb) cb->nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp) < 0) { - if (!refcount_inc_not_zero(&exp->use)) - continue; - cb->args[1] = (unsigned long)exp; + cb->args[1] = ctnetlink_exp_id(exp); goto out; } } @@ -3234,9 +3232,6 @@ ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb) cb->args[0] = 1; out: rcu_read_unlock(); - if (last) - nf_ct_expect_put(last); - return skb->len; } @@ -3255,7 +3250,6 @@ static int ctnetlink_dump_exp_ct(struct net *net, struct sock *ctnl, struct nf_conntrack_zone zone; struct netlink_dump_control c = { .dump = ctnetlink_exp_ct_dump_table, - .done = ctnetlink_exp_done, }; err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, @@ -3305,7 +3299,6 @@ static int ctnetlink_get_expect(struct sk_buff *skb, else { struct netlink_dump_control c = { .dump = ctnetlink_exp_dump_table, - .done = ctnetlink_exp_done, }; return netlink_dump_start(info->sk, skb, info->nlh, &c); } -- 2.9.5

2 1

[PATCH OLK-6.6 0/4] CVE-2025-38678
by Zhang Changzhong 07 Feb '26

07 Feb '26

Pablo Neira Ayuso (1): netfilter: nf_tables: reject duplicate device on updates Phil Sutter (1): netfilter: nf_tables: Introduce functions freeing nft_hook objects Uros Bizjak (2): err.h: add ERR_PTR_PCPU(), PTR_ERR_PCPU() and IS_ERR_PCPU() macros netfilter: nf_tables: Fix percpu address space issues in nf_tables_api.c include/linux/err.h | 9 +++++ net/netfilter/nf_tables_api.c | 84 +++++++++++++++++++++++++++++++------------ 2 files changed, 71 insertions(+), 22 deletions(-) -- 2.9.5

2 5

[PATCH OLK-5.10] sctp: linearize cloned gso packets in sctp_rcv
by Zhang Changzhong 07 Feb '26

07 Feb '26

From: Xin Long <lucien.xin(a)gmail.com> stable inclusion from stable-v5.10.241 commit 03d0cc6889e02420125510b5444b570f4bbf53d5 category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/9113 CVE: CVE-2025-38718 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit fd60d8a086191fe33c2d719732d2482052fa6805 ] A cloned head skb still shares these frag skbs in fraglist with the original head skb. It's not safe to access these frag skbs. syzbot reported two use-of-uninitialized-memory bugs caused by this: BUG: KMSAN: uninit-value in sctp_inq_pop+0x15b7/0x1920 net/sctp/inqueue.c:211 sctp_inq_pop+0x15b7/0x1920 net/sctp/inqueue.c:211 sctp_assoc_bh_rcv+0x1a7/0xc50 net/sctp/associola.c:998 sctp_inq_push+0x2ef/0x380 net/sctp/inqueue.c:88 sctp_backlog_rcv+0x397/0xdb0 net/sctp/input.c:331 sk_backlog_rcv+0x13b/0x420 include/net/sock.h:1122 __release_sock+0x1da/0x330 net/core/sock.c:3106 release_sock+0x6b/0x250 net/core/sock.c:3660 sctp_wait_for_connect+0x487/0x820 net/sctp/socket.c:9360 sctp_sendmsg_to_asoc+0x1ec1/0x1f00 net/sctp/socket.c:1885 sctp_sendmsg+0x32b9/0x4a80 net/sctp/socket.c:2031 inet_sendmsg+0x25a/0x280 net/ipv4/af_inet.c:851 sock_sendmsg_nosec net/socket.c:718 [inline] and BUG: KMSAN: uninit-value in sctp_assoc_bh_rcv+0x34e/0xbc0 net/sctp/associola.c:987 sctp_assoc_bh_rcv+0x34e/0xbc0 net/sctp/associola.c:987 sctp_inq_push+0x2a3/0x350 net/sctp/inqueue.c:88 sctp_backlog_rcv+0x3c7/0xda0 net/sctp/input.c:331 sk_backlog_rcv+0x142/0x420 include/net/sock.h:1148 __release_sock+0x1d3/0x330 net/core/sock.c:3213 release_sock+0x6b/0x270 net/core/sock.c:3767 sctp_wait_for_connect+0x458/0x820 net/sctp/socket.c:9367 sctp_sendmsg_to_asoc+0x223a/0x2260 net/sctp/socket.c:1886 sctp_sendmsg+0x3910/0x49f0 net/sctp/socket.c:2032 inet_sendmsg+0x269/0x2a0 net/ipv4/af_inet.c:851 sock_sendmsg_nosec net/socket.c:712 [inline] This patch fixes it by linearizing cloned gso packets in sctp_rcv(). Fixes: 90017accff61 ("sctp: Add GSO support") Reported-by: syzbot+773e51afe420baaf0e2b(a)syzkaller.appspotmail.com Reported-by: syzbot+70a42f45e76bede082be(a)syzkaller.appspotmail.com Signed-off-by: Xin Long <lucien.xin(a)gmail.com> Reviewed-by: Marcelo Ricardo Leitner <marcelo.leitner(a)gmail.com> Link: https://patch.msgid.link/dd7dc337b99876d4132d0961f776913719f7d225.175459561… Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Liu Mingrui <liumingrui(a)huawei.com> Signed-off-by: Zhang Changzhong <zhangchangzhong(a)huawei.com> --- net/sctp/input.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/sctp/input.c b/net/sctp/input.c index 8fe1a74..079b1bf 100644 --- a/net/sctp/input.c +++ b/net/sctp/input.c @@ -114,7 +114,7 @@ int sctp_rcv(struct sk_buff *skb) * it's better to just linearize it otherwise crc computing * takes longer. */ - if ((!is_gso && skb_linearize(skb)) || + if (((!is_gso || skb_cloned(skb)) && skb_linearize(skb)) || !pskb_may_pull(skb, sizeof(struct sctphdr))) goto discard_it; -- 2.9.5

2 1

[PATCH OLK-5.10] libceph: fix potential use-after-free in have_mon_and_osd_map()
by Zhang Changzhong 07 Feb '26

07 Feb '26

From: Ilya Dryomov <idryomov(a)gmail.com> stable inclusion from stable-v5.10.247 commit bb4910c5fd436701faf367e1b5476a5a6d2aff1c category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/11584 CVE: CVE-2025-68285 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit 076381c261374c587700b3accf410bdd2dba334e upstream. The wait loop in __ceph_open_session() can race with the client receiving a new monmap or osdmap shortly after the initial map is received. Both ceph_monc_handle_map() and handle_one_map() install a new map immediately after freeing the old one kfree(monc->monmap); monc->monmap = monmap; ceph_osdmap_destroy(osdc->osdmap); osdc->osdmap = newmap; under client->monc.mutex and client->osdc.lock respectively, but because neither is taken in have_mon_and_osd_map() it's possible for client->monc.monmap->epoch and client->osdc.osdmap->epoch arms in client->monc.monmap && client->monc.monmap->epoch && client->osdc.osdmap && client->osdc.osdmap->epoch; condition to dereference an already freed map. This happens to be reproducible with generic/395 and generic/397 with KASAN enabled: BUG: KASAN: slab-use-after-free in have_mon_and_osd_map+0x56/0x70 Read of size 4 at addr ffff88811012d810 by task mount.ceph/13305 CPU: 2 UID: 0 PID: 13305 Comm: mount.ceph Not tainted 6.14.0-rc2-build2+ #1266 ... Call Trace: <TASK> have_mon_and_osd_map+0x56/0x70 ceph_open_session+0x182/0x290 ceph_get_tree+0x333/0x680 vfs_get_tree+0x49/0x180 do_new_mount+0x1a3/0x2d0 path_mount+0x6dd/0x730 do_mount+0x99/0xe0 __do_sys_mount+0x141/0x180 do_syscall_64+0x9f/0x100 entry_SYSCALL_64_after_hwframe+0x76/0x7e </TASK> Allocated by task 13305: ceph_osdmap_alloc+0x16/0x130 ceph_osdc_init+0x27a/0x4c0 ceph_create_client+0x153/0x190 create_fs_client+0x50/0x2a0 ceph_get_tree+0xff/0x680 vfs_get_tree+0x49/0x180 do_new_mount+0x1a3/0x2d0 path_mount+0x6dd/0x730 do_mount+0x99/0xe0 __do_sys_mount+0x141/0x180 do_syscall_64+0x9f/0x100 entry_SYSCALL_64_after_hwframe+0x76/0x7e Freed by task 9475: kfree+0x212/0x290 handle_one_map+0x23c/0x3b0 ceph_osdc_handle_map+0x3c9/0x590 mon_dispatch+0x655/0x6f0 ceph_con_process_message+0xc3/0xe0 ceph_con_v1_try_read+0x614/0x760 ceph_con_workfn+0x2de/0x650 process_one_work+0x486/0x7c0 process_scheduled_works+0x73/0x90 worker_thread+0x1c8/0x2a0 kthread+0x2ec/0x300 ret_from_fork+0x24/0x40 ret_from_fork_asm+0x1a/0x30 Rewrite the wait loop to check the above condition directly with client->monc.mutex and client->osdc.lock taken as appropriate. While at it, improve the timeout handling (previously mount_timeout could be exceeded in case wait_event_interruptible_timeout() slept more than once) and access client->auth_err under client->monc.mutex to match how it's set in finish_auth(). monmap_show() and osdmap_show() now take the respective lock before accessing the map as well. Cc: stable(a)vger.kernel.org Reported-by: David Howells <dhowells(a)redhat.com> Signed-off-by: Ilya Dryomov <idryomov(a)gmail.com> Reviewed-by: Viacheslav Dubeyko <Slava.Dubeyko(a)ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Zhang Changzhong <zhangchangzhong(a)huawei.com> --- net/ceph/ceph_common.c | 53 ++++++++++++++++++++++++++++++-------------------- net/ceph/debugfs.c | 14 +++++++++---- 2 files changed, 42 insertions(+), 25 deletions(-) diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c index 4e7edd7..c3bee8f 100644 --- a/net/ceph/ceph_common.c +++ b/net/ceph/ceph_common.c @@ -750,41 +750,52 @@ void ceph_reset_client_addr(struct ceph_client *client) EXPORT_SYMBOL(ceph_reset_client_addr); /* - * true if we have the mon map (and have thus joined the cluster) - */ -static bool have_mon_and_osd_map(struct ceph_client *client) -{ - return client->monc.monmap && client->monc.monmap->epoch && - client->osdc.osdmap && client->osdc.osdmap->epoch; -} - -/* * mount: join the ceph cluster, and open root directory. */ int __ceph_open_session(struct ceph_client *client, unsigned long started) { - unsigned long timeout = client->options->mount_timeout; - long err; + DEFINE_WAIT_FUNC(wait, woken_wake_function); + long timeout = ceph_timeout_jiffies(client->options->mount_timeout); + bool have_monmap, have_osdmap; + int err; /* open session, and wait for mon and osd maps */ err = ceph_monc_open_session(&client->monc); if (err < 0) return err; - while (!have_mon_and_osd_map(client)) { - if (timeout && time_after_eq(jiffies, started + timeout)) - return -ETIMEDOUT; + add_wait_queue(&client->auth_wq, &wait); + for (;;) { + mutex_lock(&client->monc.mutex); + err = client->auth_err; + have_monmap = client->monc.monmap && client->monc.monmap->epoch; + mutex_unlock(&client->monc.mutex); + + down_read(&client->osdc.lock); + have_osdmap = client->osdc.osdmap && client->osdc.osdmap->epoch; + up_read(&client->osdc.lock); + + if (err || (have_monmap && have_osdmap)) + break; + + if (signal_pending(current)) { + err = -ERESTARTSYS; + break; + } + + if (!timeout) { + err = -ETIMEDOUT; + break; + } /* wait */ dout("mount waiting for mon_map\n"); - err = wait_event_interruptible_timeout(client->auth_wq, - have_mon_and_osd_map(client) || (client->auth_err < 0), - ceph_timeout_jiffies(timeout)); - if (err < 0) - return err; - if (client->auth_err < 0) - return client->auth_err; + timeout = wait_woken(&wait, TASK_INTERRUPTIBLE, timeout); } + remove_wait_queue(&client->auth_wq, &wait); + + if (err) + return err; pr_info("client%llu fsid %pU\n", ceph_client_gid(client), &client->fsid); diff --git a/net/ceph/debugfs.c b/net/ceph/debugfs.c index 2110439..83c270b 100644 --- a/net/ceph/debugfs.c +++ b/net/ceph/debugfs.c @@ -36,8 +36,9 @@ static int monmap_show(struct seq_file *s, void *p) int i; struct ceph_client *client = s->private; + mutex_lock(&client->monc.mutex); if (client->monc.monmap == NULL) - return 0; + goto out_unlock; seq_printf(s, "epoch %d\n", client->monc.monmap->epoch); for (i = 0; i < client->monc.monmap->num_mon; i++) { @@ -48,6 +49,9 @@ static int monmap_show(struct seq_file *s, void *p) ENTITY_NAME(inst->name), ceph_pr_addr(&inst->addr)); } + +out_unlock: + mutex_unlock(&client->monc.mutex); return 0; } @@ -56,13 +60,14 @@ static int osdmap_show(struct seq_file *s, void *p) int i; struct ceph_client *client = s->private; struct ceph_osd_client *osdc = &client->osdc; - struct ceph_osdmap *map = osdc->osdmap; + struct ceph_osdmap *map; struct rb_node *n; + down_read(&osdc->lock); + map = osdc->osdmap; if (map == NULL) - return 0; + goto out_unlock; - down_read(&osdc->lock); seq_printf(s, "epoch %u barrier %u flags 0x%x\n", map->epoch, osdc->epoch_barrier, map->flags); @@ -131,6 +136,7 @@ static int osdmap_show(struct seq_file *s, void *p) seq_printf(s, "]\n"); } +out_unlock: up_read(&osdc->lock); return 0; } -- 2.9.5

2 1

[PATCH OLK-5.10] tipc: Fix use-after-free in tipc_mon_reinit_self().
by Zhang Changzhong 07 Feb '26

07 Feb '26

From: Kuniyuki Iwashima <kuniyu(a)google.com> stable inclusion from stable-v5.10.247 commit b2e77c789c234e7fe49057d2ced8f32e2d2c7901 category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/11246 CVE: CVE-2025-40280 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 0725e6afb55128be21a2ca36e9674f573ccec173 ] syzbot reported use-after-free of tipc_net(net)->monitors[] in tipc_mon_reinit_self(). [0] The array is protected by RTNL, but tipc_mon_reinit_self() iterates over it without RTNL. tipc_mon_reinit_self() is called from tipc_net_finalize(), which is always under RTNL except for tipc_net_finalize_work(). Let's hold RTNL in tipc_net_finalize_work(). [0]: BUG: KASAN: slab-use-after-free in __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] BUG: KASAN: slab-use-after-free in _raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162 Read of size 1 at addr ffff88805eae1030 by task kworker/0:7/5989 CPU: 0 UID: 0 PID: 5989 Comm: kworker/0:7 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Workqueue: events tipc_net_finalize_work Call Trace: <TASK> dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 __kasan_check_byte+0x2a/0x40 mm/kasan/common.c:568 kasan_check_byte include/linux/kasan.h:399 [inline] lock_acquire+0x8d/0x360 kernel/locking/lockdep.c:5842 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162 rtlock_slowlock kernel/locking/rtmutex.c:1894 [inline] rwbase_rtmutex_lock_state kernel/locking/spinlock_rt.c:160 [inline] rwbase_write_lock+0xd3/0x7e0 kernel/locking/rwbase_rt.c:244 rt_write_lock+0x76/0x110 kernel/locking/spinlock_rt.c:243 write_lock_bh include/linux/rwlock_rt.h:99 [inline] tipc_mon_reinit_self+0x79/0x430 net/tipc/monitor.c:718 tipc_net_finalize+0x115/0x190 net/tipc/net.c:140 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x439/0x7d0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK> Allocated by task 6089: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:388 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:405 kasan_kmalloc include/linux/kasan.h:260 [inline] __kmalloc_cache_noprof+0x1a8/0x320 mm/slub.c:4407 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] tipc_mon_create+0xc3/0x4d0 net/tipc/monitor.c:657 tipc_enable_bearer net/tipc/bearer.c:357 [inline] __tipc_nl_bearer_enable+0xe16/0x13f0 net/tipc/bearer.c:1047 __tipc_nl_compat_doit net/tipc/netlink_compat.c:371 [inline] tipc_nl_compat_doit+0x3bc/0x5f0 net/tipc/netlink_compat.c:393 tipc_nl_compat_handle net/tipc/netlink_compat.c:-1 [inline] tipc_nl_compat_recv+0x83c/0xbe0 net/tipc/netlink_compat.c:1321 genl_family_rcv_msg_doit+0x215/0x300 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x60e/0x790 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x846/0xa10 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:729 ____sys_sendmsg+0x508/0x820 net/socket.c:2614 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2668 __sys_sendmsg net/socket.c:2700 [inline] __do_sys_sendmsg net/socket.c:2705 [inline] __se_sys_sendmsg net/socket.c:2703 [inline] __x64_sys_sendmsg+0x1a1/0x260 net/socket.c:2703 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 6088: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:243 [inline] __kasan_slab_free+0x5b/0x80 mm/kasan/common.c:275 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2422 [inline] slab_free mm/slub.c:4695 [inline] kfree+0x195/0x550 mm/slub.c:4894 tipc_l2_device_event+0x380/0x650 net/tipc/bearer.c:-1 notifier_call_chain+0x1b3/0x3e0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2267 [inline] call_netdevice_notifiers net/core/dev.c:2281 [inline] unregister_netdevice_many_notify+0x14d7/0x1fe0 net/core/dev.c:12166 unregister_netdevice_many net/core/dev.c:12229 [inline] unregister_netdevice_queue+0x33c/0x380 net/core/dev.c:12073 unregister_netdevice include/linux/netdevice.h:3385 [inline] __tun_detach+0xe4d/0x1620 drivers/net/tun.c:621 tun_detach drivers/net/tun.c:637 [inline] tun_chr_close+0x10d/0x1c0 drivers/net/tun.c:3433 __fput+0x458/0xa80 fs/file_table.c:468 task_work_run+0x1d4/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f Fixes: 46cb01eeeb86 ("tipc: update mon's self addr when node addr generated") Reported-by: syzbot+d7dad7fd4b3921104957(a)syzkaller.appspotmail.com Closes: https://lore.kernel.org/netdev/690c323a.050a0220.baf87.007f.GAE@google.com/ Signed-off-by: Kuniyuki Iwashima <kuniyu(a)google.com> Reviewed-by: Simon Horman <horms(a)kernel.org> Link: https://patch.msgid.link/20251107064038.2361188-1-kuniyu@google.com Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Zhang Changzhong <zhangchangzhong(a)huawei.com> --- net/tipc/net.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/tipc/net.c b/net/tipc/net.c index 671cb4f..95aa3a9 100644 --- a/net/tipc/net.c +++ b/net/tipc/net.c @@ -141,7 +141,9 @@ void tipc_net_finalize_work(struct work_struct *work) { struct tipc_net *tn = container_of(work, struct tipc_net, work); + rtnl_lock(); tipc_net_finalize(tipc_link_net(tn->bcl), tn->trial_addr); + rtnl_unlock(); } void tipc_net_stop(struct net *net) -- 2.9.5

2 1

[PATCH OLK-6.6 0/5] CVE-2025-39948
by Zhang Changzhong 07 Feb '26

07 Feb '26

Jacob Keller (1): ice: fix Rx page leak on multi-buffer frames Larysa Zaremba (1): ice: Introduce ice_xdp_buff Maciej Fijalkowski (2): ice: gather page_count()'s of each frag right before XDP prog call ice: stop storing XDP verdict within ice_rx_buf Michal Kubiak (1): ice: fix incorrect counter for buffer allocation failures drivers/net/ethernet/intel/ice/ice_txrx.c | 122 ++++++++++++++++---------- drivers/net/ethernet/intel/ice/ice_txrx.h | 20 +++-- drivers/net/ethernet/intel/ice/ice_txrx_lib.h | 53 +++-------- 3 files changed, 99 insertions(+), 96 deletions(-) -- 2.9.5

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[PATCH OLK-6.6] netfilter: ctnetlink: remove refcounting in expectation dumpers
by Zhang Changzhong 07 Feb '26

07 Feb '26

From: Florian Westphal <fw(a)strlen.de> mainline inclusion from mainline-v6.17-rc2 commit 1492e3dcb2be3aa46d1963da96aa9593e4e4db5a category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/ICXMC9 CVE: CVE-2025-39764 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- Same pattern as previous patch: do not keep the expectation object alive via refcount, only store a cookie value and then use that as the skip hint for dump resumption. AFAICS this has the same issue as the one resolved in the conntrack dumper, when we do if (!refcount_inc_not_zero(&exp->use)) to increment the refcount, there is a chance that exp == last, which causes a double-increment of the refcount and subsequent memory leak. Fixes: cf6994c2b981 ("[NETFILTER]: nf_conntrack_netlink: sync expectation dumping with conntrack table dumping") Fixes: e844a928431f ("netfilter: ctnetlink: allow to dump expectation per master conntrack") Signed-off-by: Florian Westphal <fw(a)strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo(a)netfilter.org> Signed-off-by: Wang Liang <wangliang74(a)huawei.com> Signed-off-by: Zhang Changzhong <zhangchangzhong(a)huawei.com> --- net/netfilter/nf_conntrack_netlink.c | 41 +++++++++++++++--------------------- 1 file changed, 17 insertions(+), 24 deletions(-) diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index 282e964..698e79c 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -3138,23 +3138,27 @@ ctnetlink_expect_event(unsigned int events, const struct nf_exp_event *item) return 0; } #endif -static int ctnetlink_exp_done(struct netlink_callback *cb) + +static unsigned long ctnetlink_exp_id(const struct nf_conntrack_expect *exp) { - if (cb->args[1]) - nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); - return 0; + unsigned long id = (unsigned long)exp; + + id += nf_ct_get_id(exp->master); + id += exp->class; + + return id ? id : 1; } static int ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) { struct net *net = sock_net(skb->sk); - struct nf_conntrack_expect *exp, *last; struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); u_int8_t l3proto = nfmsg->nfgen_family; + unsigned long last_id = cb->args[1]; + struct nf_conntrack_expect *exp; rcu_read_lock(); - last = (struct nf_conntrack_expect *)cb->args[1]; for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { restart: hlist_for_each_entry_rcu(exp, &nf_ct_expect_hash[cb->args[0]], @@ -3166,7 +3170,7 @@ ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) continue; if (cb->args[1]) { - if (exp != last) + if (ctnetlink_exp_id(exp) != last_id) continue; cb->args[1] = 0; } @@ -3175,9 +3179,7 @@ ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) cb->nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp) < 0) { - if (!refcount_inc_not_zero(&exp->use)) - continue; - cb->args[1] = (unsigned long)exp; + cb->args[1] = ctnetlink_exp_id(exp); goto out; } } @@ -3188,32 +3190,30 @@ ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) } out: rcu_read_unlock(); - if (last) - nf_ct_expect_put(last); - return skb->len; } static int ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb) { - struct nf_conntrack_expect *exp, *last; struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); struct nf_conn *ct = cb->data; struct nf_conn_help *help = nfct_help(ct); u_int8_t l3proto = nfmsg->nfgen_family; + unsigned long last_id = cb->args[1]; + struct nf_conntrack_expect *exp; if (cb->args[0]) return 0; rcu_read_lock(); - last = (struct nf_conntrack_expect *)cb->args[1]; + restart: hlist_for_each_entry_rcu(exp, &help->expectations, lnode) { if (l3proto && exp->tuple.src.l3num != l3proto) continue; if (cb->args[1]) { - if (exp != last) + if (ctnetlink_exp_id(exp) != last_id) continue; cb->args[1] = 0; } @@ -3221,9 +3221,7 @@ ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb) cb->nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp) < 0) { - if (!refcount_inc_not_zero(&exp->use)) - continue; - cb->args[1] = (unsigned long)exp; + cb->args[1] = ctnetlink_exp_id(exp); goto out; } } @@ -3234,9 +3232,6 @@ ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb) cb->args[0] = 1; out: rcu_read_unlock(); - if (last) - nf_ct_expect_put(last); - return skb->len; } @@ -3255,7 +3250,6 @@ static int ctnetlink_dump_exp_ct(struct net *net, struct sock *ctnl, struct nf_conntrack_zone zone; struct netlink_dump_control c = { .dump = ctnetlink_exp_ct_dump_table, - .done = ctnetlink_exp_done, }; err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, @@ -3305,7 +3299,6 @@ static int ctnetlink_get_expect(struct sk_buff *skb, else { struct netlink_dump_control c = { .dump = ctnetlink_exp_dump_table, - .done = ctnetlink_exp_done, }; return netlink_dump_start(info->sk, skb, info->nlh, &c); } -- 2.9.5

2 1

[PATCH OLK-6.6 0/4] CVE-2025-38678
by Zhang Changzhong 07 Feb '26

07 Feb '26

Pablo Neira Ayuso (1): netfilter: nf_tables: reject duplicate device on updates Phil Sutter (1): netfilter: nf_tables: Introduce functions freeing nft_hook objects Uros Bizjak (2): err.h: add ERR_PTR_PCPU(), PTR_ERR_PCPU() and IS_ERR_PCPU() macros netfilter: nf_tables: Fix percpu address space issues in nf_tables_api.c include/linux/err.h | 9 +++++ net/netfilter/nf_tables_api.c | 84 +++++++++++++++++++++++++++++++------------ 2 files changed, 71 insertions(+), 22 deletions(-) -- 2.9.5

2 5