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[PATCH OLK-6.6 0/2] net: Fix CVE-2026-53264
by Dong Chenchen 20 Jul '26

20 Jul '26

net: Fix CVE-2026-53264 Dong Chenchen (1): net: Fix kabi breakage of struct tc_action Jamal Hadi Salim (1): net/sched: act_api: use RCU with deferred freeing for action lifecycle include/net/act_api.h | 7 +++++++ net/sched/act_api.c | 26 ++++++++++++++++++++------ 2 files changed, 27 insertions(+), 6 deletions(-) -- 2.25.1

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[PATCH OLK-6.6 0/3] bonding: Fix CVE-2026-43456
by Dong Chenchen 20 Jul '26

20 Jul '26

Fix CVE-2026-43456 Dong Chenchen (1): net: Fix kabi breakage of struct header_ops Eric Dumazet (1): bonding: prevent potential infinite loop in bond_header_parse() Jiayuan Chen (1): bonding: fix type confusion in bond_setup_by_slave() drivers/net/bonding/bond_main.c | 53 ++++++++++++++++++++++++++++++++- include/linux/netdevice.h | 15 +++++++--- 2 files changed, 63 insertions(+), 5 deletions(-) -- 2.25.1

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[PATCH OLK-6.6 0/4] net: Fix CVE-2026-53091
by Dong Chenchen 20 Jul '26

20 Jul '26

Fix CVE-2026-53091 Cosmin Ratiu (1): xfrm: Don't clobber inner headers when already set Eric Dumazet (2): net: qdisc_pkt_len_segs_init() cleanup net: pull headers in qdisc_pkt_len_segs_init() Fengyuan Gong (1): net: account for encap headers in qdisc pkt len net/core/dev.c | 79 ++++++++++++++++++++++++++---------------- net/sched/sch_cake.c | 5 ++- net/xfrm/xfrm_output.c | 20 +++++++---- 3 files changed, 67 insertions(+), 37 deletions(-) -- 2.25.1

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[PATCH OLK-6.6 0/2] net: Fix CVE-2026-53264
by Dong Chenchen 20 Jul '26

20 Jul '26

net: Fix CVE-2026-53264 Dong Chenchen (1): net: Fix kabi breakage of struct tc_action Jamal Hadi Salim (1): net/sched: act_api: use RCU with deferred freeing for action lifecycle include/net/act_api.h | 7 +++++++ net/sched/act_api.c | 26 ++++++++++++++++++++------ 2 files changed, 27 insertions(+), 6 deletions(-) -- 2.25.1

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[PATCH OLK-6.6 0/3] bonding: Fix CVE-2026-43456
by Dong Chenchen 20 Jul '26

20 Jul '26

Fix CVE-2026-43456 Dong Chenchen (1): net: Fix kabi breakage of struct header_ops Eric Dumazet (1): bonding: prevent potential infinite loop in bond_header_parse() Jiayuan Chen (1): bonding: fix type confusion in bond_setup_by_slave() drivers/net/bonding/bond_main.c | 53 ++++++++++++++++++++++++++++++++- include/linux/netdevice.h | 15 +++++++--- 2 files changed, 63 insertions(+), 5 deletions(-) -- 2.25.1

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[PATCH OLK-5.10] Bluetooth: L2CAP: use chan timer to close channels in cleanup_listen()
by Chen Jinghuang 20 Jul '26

20 Jul '26

From: Siwei Zhang <oss(a)fourdim.xyz> stable inclusion from stable-v5.10.259 commit 3634cbdc2eb414b69ffa752ddbe5e0458518e321 category: bugfix bugzilla: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 8c8e620467a7b51562dbcefbd1f09f288d7d710d ] l2cap_chan_close() removes the channel from conn->chan_l, which must be done under conn->lock. cleanup_listen() runs under the parent sk_lock, so acquiring conn->lock would invert the established conn->lock -> chan->lock -> sk_lock order. Instead of calling l2cap_chan_close() directly, schedule l2cap_chan_timeout with delay 0 to close the channel asynchronously. The timeout handler already acquires conn->lock and chan->lock in the correct order. The timer is only armed when chan->conn is still set: if it is already NULL, l2cap_conn_del() has already processed this channel (l2cap_chan_del + l2cap_sock_teardown_cb + l2cap_sock_close_cb), so there is nothing left to do. If l2cap_conn_del() races in after the timer is armed, __clear_chan_timer() inside l2cap_chan_del() cancels it; if the timer has already fired, the handler returns harmlessly because chan->conn was cleared. Fixes: 3df91ea20e74 ("Bluetooth: Revert to mutexes from RCU list") Cc: <stable(a)vger.kernel.org> # 0b58004: Bluetooth: fix UAF in l2cap_sock_cleanup_listen() vs l2cap_conn_del() Signed-off-by: Siwei Zhang <oss(a)fourdim.xyz> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz(a)intel.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Chen Jinghuang <chenjinghuang2(a)huawei.com> --- net/bluetooth/l2cap_sock.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c index 644ec4bf06f0..4b4a9268f007 100644 --- a/net/bluetooth/l2cap_sock.c +++ b/net/bluetooth/l2cap_sock.c @@ -1441,6 +1441,10 @@ static void l2cap_sock_cleanup_listen(struct sock *parent) * pin it (hold_unless_zero() additionally skips a chan already past * its last reference). We then drop the sk lock before taking * chan->lock, so sk and chan locks are never held together. + * + * Since we cannot call l2cap_chan_close() without conn->lock, + * schedule l2cap_chan_timeout to close the channel; it already + * acquires conn->lock -> chan->lock in the correct order. */ while ((sk = bt_accept_dequeue(parent, NULL))) { struct l2cap_chan *chan; @@ -1458,14 +1462,12 @@ static void l2cap_sock_cleanup_listen(struct sock *parent) state_to_string(chan->state)); l2cap_chan_lock(chan); - __clear_chan_timer(chan); - l2cap_chan_close(chan, ECONNRESET); - /* l2cap_conn_del() may already have killed this socket - * (it sets SOCK_DEAD); skip the duplicate to avoid a - * double sock_put()/l2cap_chan_put(). + /* Since we cannot call l2cap_chan_close() without + * conn->lock, schedule its timer to trigger the close + * and cleanup of this channel. */ - if (!sock_flag(sk, SOCK_DEAD)) - l2cap_sock_kill(sk); + if (chan->conn) + __set_chan_timer(chan, 0); l2cap_chan_unlock(chan); l2cap_chan_put(chan); -- 2.34.1

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[PATCH OLK-5.10] ceph: fix a buffer leak in __ceph_setxattr()
by Pan Taixi 20 Jul '26

20 Jul '26

From: Viacheslav Dubeyko <Slava.Dubeyko(a)ibm.com> stable inclusion from stable-v5.10.258 commit 521e5aba857fd267624892c8dd6295f22ce0267e category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/15664 CVE: CVE-2026-52962 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit 5d3cc36b4e77a27ce7b686b7c59c7072bcb3fa8e upstream. The old_blob in __ceph_setxattr() can store ci->i_xattrs.prealloc_blob value during the retry. However, it is never called the ceph_buffer_put() for the old_blob object. This patch fixes the issue of the buffer leak. Cc: stable(a)vger.kernel.org Signed-off-by: Viacheslav Dubeyko <Slava.Dubeyko(a)ibm.com> Reviewed-by: Alex Markuze <amarkuze(a)redhat.com> Signed-off-by: Ilya Dryomov <idryomov(a)gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Lin Yujun <linyujun809(a)h-partners.com> Signed-off-by: Pan Taixi <pantaixi1(a)huawei.com> --- fs/ceph/xattr.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c index 76322c0f6e5f..d1fd81b1b541 100644 --- a/fs/ceph/xattr.c +++ b/fs/ceph/xattr.c @@ -1130,10 +1130,11 @@ int __ceph_setxattr(struct inode *inode, const char *name, ceph_free_cap_flush(prealloc_cf); return err; do_sync: spin_unlock(&ci->i_ceph_lock); + ceph_buffer_put(old_blob); do_sync_unlocked: if (lock_snap_rwsem) up_read(&mdsc->snap_rwsem); /* security module set xattr while filling trace */ -- 2.34.1

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[PATCH OLK-6.6] bpf: Free reuseport cBPF prog after RCU grace period.
by superdcc97＠163.com 17 Jul '26

17 Jul '26

From: Kuniyuki Iwashima <kuniyu(a)google.com> stable inclusion from stable-v6.6.143 commit f8b8f1d4bb76098e87b8269a0631019648330e6d category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/15607 CVE: CVE-2026-52910 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 18fc650ccd7fe3376eca89203668cfb8268f60df ] Eulgyu Kim reported the splat below with a repro. [0] The repro sets up a UDP reuseport group with a cBPF prog and replaces it with a new one while another thread is sending a UDP packet to the group. The reuseport prog is freed by sk_reuseport_prog_free(). bpf_prog_put() is called for "e"BPF prog to destruct through multiple stages while cBPF prog is freed immediately by bpf_release_orig_filter() and bpf_prog_free(). If a reuseport prog is detached from the setsockopt() path (reuseport_attach_prog() or reuseport_detach_prog()), sk_reuseport_prog_free() is called without waiting for RCU readers to complete, resulting in various bugs. Let's defer freeing the reuseport cBPF prog after one RCU grace period. Note "e"BPF prog is safe as is unless the fast path starts to touch fields destroyed in bpf_prog_put_deferred() and __bpf_prog_put_noref(). [0]: BUG: KASAN: vmalloc-out-of-bounds in reuseport_select_sock+0xedc/0x1220 net/core/sock_reuseport.c:596 Read of size 4 at addr ffffc9000051e004 by task slowme/10208 CPU: 6 UID: 1000 PID: 10208 Comm: slowme Not tainted 7.0.0-geb7ac95ff75e #32 PREEMPT(full) Hardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: <IRQ> dump_stack_lvl+0xe8/0x150 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 reuseport_select_sock+0xedc/0x1220 net/core/sock_reuseport.c:596 udp4_lib_lookup2+0x3bc/0x950 net/ipv4/udp.c:495 __udp4_lib_lookup+0x768/0xe20 net/ipv4/udp.c:723 __udp4_lib_lookup_skb+0x297/0x390 net/ipv4/udp.c:752 __udp4_lib_rcv+0x1312/0x2620 net/ipv4/udp.c:2752 ip_protocol_deliver_rcu+0x282/0x440 net/ipv4/ip_input.c:207 ip_local_deliver_finish+0x3bb/0x6f0 net/ipv4/ip_input.c:241 NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318 NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318 __netif_receive_skb_one_core net/core/dev.c:6181 [inline] __netif_receive_skb net/core/dev.c:6294 [inline] process_backlog+0xaa4/0x1960 net/core/dev.c:6645 __napi_poll+0xae/0x340 net/core/dev.c:7709 napi_poll net/core/dev.c:7772 [inline] net_rx_action+0x5d7/0xf50 net/core/dev.c:7929 handle_softirqs+0x22b/0x870 kernel/softirq.c:622 do_softirq+0x76/0xd0 kernel/softirq.c:523 </IRQ> <TASK> __local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450 local_bh_enable include/linux/bottom_half.h:33 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:924 [inline] __dev_queue_xmit+0x1dd7/0x3710 net/core/dev.c:4890 neigh_output include/net/neighbour.h:556 [inline] ip_finish_output2+0xca9/0x1070 net/ipv4/ip_output.c:237 NF_HOOK_COND include/linux/netfilter.h:307 [inline] ip_output+0x29f/0x450 net/ipv4/ip_output.c:438 ip_send_skb+0x45/0xc0 net/ipv4/ip_output.c:1508 udp_send_skb+0xb04/0x1510 net/ipv4/udp.c:1195 udp_sendmsg+0x1a71/0x2350 net/ipv4/udp.c:1485 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] __sys_sendto+0x554/0x680 net/socket.c:2206 __do_sys_sendto net/socket.c:2213 [inline] __se_sys_sendto net/socket.c:2209 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2209 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x160/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x415a2d Code: b3 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6bc31e41e8 EFLAGS: 00000212 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f6bc31e4cdc RCX: 0000000000415a2d RDX: 0000000000000001 RSI: 00007f6bc31e421f RDI: 0000000000000003 RBP: 00007f6bc31e4240 R08: 00007f6bc31e4220 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000212 R12: 00007f6bc31e46c0 R13: ffffffffffffffb8 R14: 0000000000000000 R15: 00007ffc9b0d70b0 </TASK> Fixes: 538950a1b752 ("soreuseport: setsockopt SO_ATTACH_REUSEPORT_[CE]BPF") Reported-by: Eulgyu Kim <eulgyukim(a)snu.ac.kr> Reported-by: Taeyang Lee <0wn(a)theori.io> Signed-off-by: Kuniyuki Iwashima <kuniyu(a)google.com> Signed-off-by: Daniel Borkmann <daniel(a)iogearbox.net> Acked-by: Daniel Borkmann <daniel(a)iogearbox.net> Link: https://lore.kernel.org/bpf/20260426012647.3233119-1-kuniyu@google.com Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Dong Chenchen <dongchenchen2(a)huawei.com> --- net/core/filter.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/net/core/filter.c b/net/core/filter.c index 26b715a89e29..50839a1f6548 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -1643,15 +1643,24 @@ int sk_reuseport_attach_bpf(u32 ufd, struct sock *sk) return err; } +static void sk_reuseport_prog_free_rcu(struct rcu_head *rcu) +{ + struct bpf_prog_aux *aux = container_of(rcu, struct bpf_prog_aux, rcu); + struct bpf_prog *prog = aux->prog; + + bpf_release_orig_filter(prog); + bpf_prog_free(prog); +} + void sk_reuseport_prog_free(struct bpf_prog *prog) { if (!prog) return; - if (prog->type == BPF_PROG_TYPE_SK_REUSEPORT) - bpf_prog_put(prog); + if (bpf_prog_was_classic(prog)) + call_rcu(&prog->aux->rcu, sk_reuseport_prog_free_rcu); else - bpf_prog_destroy(prog); + bpf_prog_put(prog); } struct bpf_scratchpad { -- 2.43.0

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[PATCH OLK-6.6] netfilter: nf_tables: use list_del_rcu for netlink hooks
by superdcc97＠163.com 17 Jul '26

17 Jul '26

From: Florian Westphal <fw(a)strlen.de> mainline inclusion from mainline-v7.1-rc2 commit f3224ee463f8f6f6ced7dcdf6081add4f8128527 ("netfilter: nf_tables: use list_del_rcu for netlink hooks") category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/15588 CVE: CVE-2026-46324 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- nft_netdev_unregister_hooks and __nft_unregister_flowtable_net_hooks need to use list_del_rcu(), this list can be walked by concurrent dumpers. Add a new helper and use it consistently. Fixes: f9a43007d3f7 ("netfilter: nf_tables: double hook unregistration in netns path") Signed-off-by: Florian Westphal <fw(a)strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo(a)netfilter.org> Conflicts: net/netfilter/nf_tables_api.c [commit 73319a8ee18b ("netfilter: nf_tables: Have a list of nf_hook_ops in nft_hook") introduced the ops_list structure and __nft_netdev_hook_free_rcu() helper which are not present in OLK-6.6. Adapted to use the single hook->ops and existing kfree_rcu()-based nft_netdev_hook_free_rcu() helper instead.] Signed-off-by: Dong Chenchen <dongchenchen2(a)huawei.com> --- net/netfilter/nf_tables_api.c | 44 ++++++++++++++--------------------- 1 file changed, 18 insertions(+), 26 deletions(-) diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index 919be34ac7a0..34b837976900 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -333,6 +333,12 @@ static void nft_netdev_hook_free_rcu(struct nft_hook *hook) kfree_rcu(hook, rcu); } +static void nft_netdev_hook_unlink_free_rcu(struct nft_hook *hook) +{ + list_del_rcu(&hook->list); + nft_netdev_hook_free_rcu(hook); +} + static void nft_netdev_unregister_hooks(struct net *net, struct list_head *hook_list, bool release_netdev) @@ -341,10 +347,8 @@ static void nft_netdev_unregister_hooks(struct net *net, list_for_each_entry_safe(hook, next, hook_list, list) { nf_unregister_net_hook(net, &hook->ops); - if (release_netdev) { - list_del(&hook->list); - nft_netdev_hook_free_rcu(hook); - } + if (release_netdev) + nft_netdev_hook_unlink_free_rcu(hook); } } @@ -2106,10 +2110,8 @@ void nf_tables_chain_destroy(struct nft_chain *chain) if (nft_base_chain_netdev(table->family, basechain->ops.hooknum)) { list_for_each_entry_safe(hook, next, - &basechain->hook_list, list) { - list_del_rcu(&hook->list); - nft_netdev_hook_free_rcu(hook); - } + &basechain->hook_list, list) + nft_netdev_hook_unlink_free_rcu(hook); } module_put(basechain->type->owner); if (rcu_access_pointer(basechain->stats)) { @@ -2784,6 +2786,7 @@ static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy, list_for_each_entry_safe(h, next, &hook.list, list) { if (unregister) nf_unregister_net_hook(ctx->net, &h->ops); + /* hook.list is on stack, no need for list_del_rcu() */ list_del(&h->list); nft_netdev_hook_free_rcu(h); } @@ -8495,10 +8498,8 @@ static void __nft_unregister_flowtable_net_hooks(struct net *net, nf_unregister_net_hook(net, &hook->ops); flowtable->data.type->setup(&flowtable->data, hook->ops.dev, FLOW_BLOCK_UNBIND); - if (release_netdev) { - list_del(&hook->list); - nft_netdev_hook_free_rcu(hook); - } + if (release_netdev) + nft_netdev_hook_unlink_free_rcu(hook); } } @@ -8557,8 +8558,7 @@ static int nft_register_flowtable_net_hooks(struct net *net, break; nft_unregister_flowtable_hook(net, flowtable, hook); - list_del_rcu(&hook->list); - nft_netdev_hook_free_rcu(hook); + nft_netdev_hook_unlink_free_rcu(hook); } return err; @@ -8568,10 +8568,8 @@ static void nft_hooks_destroy(struct list_head *hook_list) { struct nft_hook *hook, *next; - list_for_each_entry_safe(hook, next, hook_list, list) { - list_del_rcu(&hook->list); - nft_netdev_hook_free_rcu(hook); - } + list_for_each_entry_safe(hook, next, hook_list, list) + nft_netdev_hook_unlink_free_rcu(hook); } static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh, @@ -8655,8 +8653,7 @@ static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh, list_for_each_entry_safe(hook, next, &flowtable_hook.list, list) { if (unregister) nft_unregister_flowtable_hook(ctx->net, flowtable, hook); - list_del_rcu(&hook->list); - nft_netdev_hook_free_rcu(hook); + nft_netdev_hook_unlink_free_rcu(hook); } return err; @@ -9149,13 +9146,8 @@ static void nf_tables_flowtable_notify(struct nft_ctx *ctx, static void nf_tables_flowtable_destroy(struct nft_flowtable *flowtable) { - struct nft_hook *hook, *next; - flowtable->data.type->free(&flowtable->data); - list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) { - list_del_rcu(&hook->list); - nft_netdev_hook_free_rcu(hook); - } + nft_hooks_destroy(&flowtable->hook_list); kfree(flowtable->name); module_put(flowtable->data.type->owner); kfree(flowtable); -- 2.43.0

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[PATCH OLK-6.6 0/2] net: Fix CVE-2026-45905 ip_rt_bug race in ICMP reverse path
by superdcc97＠163.com 17 Jul '26

17 Jul '26

From: Dong Chenchen <dongchenchen2(a)huawei.com> net: Fix CVE-2026-45905 ip_rt_bug race in ICMP reverse path This patch series fixes CVE-2026-45905 in the OLK-6.6 branch. * Patch 1: Switch icmp_route_lookup and ip_options_rcv_srr to use skb_dstref_steal/skb_dstref_restore helpers (dependency for CVE fix) * Patch 2: Fix ip_rt_bug race condition in icmp_route_lookup reverse path by checking rt2->rt_type after ip_route_input() for RTN_LOCAL Jiayuan Chen (1): xfrm: fix ip_rt_bug race in icmp_route_lookup reverse path Stanislav Fomichev (1): net: Switch to skb_dstref_steal/skb_dstref_restore for ip_route_input callers net/ipv4/icmp.c | 22 +++++++++++++++++++--- net/ipv4/ip_options.c | 5 ++--- 2 files changed, 21 insertions(+), 6 deletions(-) -- 2.43.0

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