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[PATCH openEuler-1.0-LTS] KVM: Replace guest-triggerable BUG_ON() in ioeventfd datamatch with get_unaligned()
by Yi Yang 04 Aug '26

04 Aug '26

From: Sean Christopherson <seanjc(a)google.com> mainline inclusion from mainline-v7.2-rc1 commit f1edbed787ba67988ed34e0132ca128b052b6ce8 category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/16137 CVE: CVE-2026-63806 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- Drop a BUG_ON() that has been reachable since it was first added, way back in 2009, and instead use get_unaligned() to perform potentially-unaligned accesses. For a given store, KVM x86's emulator tracks the entire value in the destination operand, x86_emulate_ctxt.dst. If the destination is memory, and the target splits multiple pages and/or is emulated MMIO, then KVM handles each fragment independently. E.g. on a page split starting at page offset 0xffc, KVM writes 4 bytes to the first page, then the remaining bytes to the second page, using ctxt->dst as the source for both (with appropriate offsets). If the destination splits a page *and* hits emulated MMIO on the second page, then KVM will complete the write to the first page, then emulate the MMIO access to the second page. If there is a datamatch-enabled ioeventfd at offset 0 of the second page, then KVM will process the remainder of the store as a potential ioeventfd signal. Putting it all together, if the guest emits a store that splits a page starting at page offset N, and the second page has a datamatch-enabled ioeventfd at offset 0, then KVM will check for datamatch using &dst.valptr[N] as the source. Due to dst (and thus dst.valptr) being 32-byte aligned, if N is not aligned to @len, the BUG_ON() fires. E.g. with a 16-byte store at page offset 0xffc, to an ioeventfd of len 8, all initial checks in ioeventfd_in_range() will succeed, and the BUG_ON() fires due to @val being 4-byte aligned, but not 8-byte aligned. ------------[ cut here ]------------ kernel BUG at arch/x86/kvm/../../../virt/kvm/eventfd.c:783! Oops: invalid opcode: 0000 [#1] SMP CPU: 0 UID: 1000 PID: 615 Comm: repro Not tainted 7.1.0-rc2-ff238429d1ea #365 PREEMPT Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 RIP: 0010:ioeventfd_write+0x6c/0x70 [kvm] Call Trace: <TASK> __kvm_io_bus_write+0x85/0xb0 [kvm] kvm_io_bus_write+0x53/0x80 [kvm] vcpu_mmio_write+0x66/0xf0 [kvm] emulator_read_write_onepage+0x12a/0x540 [kvm] emulator_read_write+0x109/0x2b0 [kvm] x86_emulate_insn+0x4f8/0xfb0 [kvm] x86_emulate_instruction+0x181/0x790 [kvm] kvm_mmu_page_fault+0x313/0x630 [kvm] vmx_handle_exit+0x18a/0x590 [kvm_intel] kvm_arch_vcpu_ioctl_run+0xc81/0x1c90 [kvm] kvm_vcpu_ioctl+0x2d5/0x970 [kvm] __x64_sys_ioctl+0x8a/0xd0 do_syscall_64+0xb7/0x890 entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x7f19c931a9bf </TASK> Modules linked in: kvm_intel kvm irqbypass ---[ end trace 0000000000000000 ]--- In a perfect world, the fix would be to simply delete the BUG_ON(), as KVM x86 doesn't perform alignment checks on "normal" memory accesses at CPL0. Sadly, C99 ruins all the fun; while the x86 architecture plays nice, dereferencing an unaligned pointer directly is undefined behavior in C, e.g. triggers splats when running with CONFIG_UBSAN_ALIGNMENT=y. Fixes: d34e6b175e61 ("KVM: add ioeventfd support") Cc: stable(a)vger.kernel.org Signed-off-by: Sean Christopherson <seanjc(a)google.com> Message-ID: <20260612225241.678509-1-seanjc(a)google.com> Signed-off-by: Paolo Bonzini <pbonzini(a)redhat.com> Signed-off-by: Yi Yang <yiyang13(a)huawei.com> --- virt/kvm/eventfd.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c index 757a17f5ebde..95e187d03862 100644 --- a/virt/kvm/eventfd.c +++ b/virt/kvm/eventfd.c @@ -36,6 +36,7 @@ #include <linux/slab.h> #include <linux/seqlock.h> #include <linux/irqbypass.h> +#include <linux/unaligned.h> #include <trace/events/kvm.h> #include <kvm/iodev.h> @@ -712,21 +713,18 @@ ioeventfd_in_range(struct _ioeventfd *p, gpa_t addr, int len, const void *val) return true; /* otherwise, we have to actually compare the data */ - - BUG_ON(!IS_ALIGNED((unsigned long)val, len)); - switch (len) { case 1: - _val = *(u8 *)val; + _val = get_unaligned((u8 *)val); break; case 2: - _val = *(u16 *)val; + _val = get_unaligned((u16 *)val); break; case 4: - _val = *(u32 *)val; + _val = get_unaligned((u32 *)val); break; case 8: - _val = *(u64 *)val; + _val = get_unaligned((u64 *)val); break; default: return false; -- 2.25.1

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[PATCH OLK-6.6] [Backport] Bluetooth: ISO: Fix data-race on iso_pi fields in hci_get_route calls
by Hui Tang 04 Aug '26

04 Aug '26

From: SeungJu Cheon <suunj1331(a)gmail.com> mainline inclusion from mainline-v7.1-rc2 commit 9ca7053d6215d89c33f28893bfd1625a32919d3f category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/16200 CVE: CVE-2026-63871 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- iso_connect_bis(), iso_connect_cis(), iso_listen_bis(), and iso_conn_big_sync() call hci_get_route() using iso_pi(sk)->dst, iso_pi(sk)->src, and iso_pi(sk)->src_type without holding lock_sock(). These fields may be modified concurrently by connect() or setsockopt() on the same socket, resulting in data-races reported by KCSAN. Fix this by snapshotting the required fields under lock_sock() before calling hci_get_route(). BUG: KCSAN: data-race in memcmp+0x45/0xb0 race at unknown origin, with read to 0xffff8880122135cf of 1 bytes by task 333 on cpu 1: memcmp+0x45/0xb0 hci_get_route+0x27e/0x490 iso_connect_cis+0x4c/0xa10 iso_sock_connect+0x60e/0xb30 __sys_connect_file+0xbd/0xe0 __sys_connect+0xe0/0x110 __x64_sys_connect+0x40/0x50 x64_sys_call+0xcad/0x1c60 do_syscall_64+0x133/0x590 entry_SYSCALL_64_after_hwframe+0x77/0x7f Fixes: 241f51931c35 ("Bluetooth: ISO: Avoid circular locking dependency") Signed-off-by: SeungJu Cheon <suunj1331(a)gmail.com> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz(a)intel.com> Conflicts: net/bluetooth/iso.c [Context conflicts due to backport] Signed-off-by: Hui Tang <tanghui20(a)huawei.com> --- net/bluetooth/iso.c | 55 +++++++++++++++++++++++++++++++++------------ 1 file changed, 41 insertions(+), 14 deletions(-) diff --git a/net/bluetooth/iso.c b/net/bluetooth/iso.c index 78b0055f0aaf..bd83943d6f27 100644 --- a/net/bluetooth/iso.c +++ b/net/bluetooth/iso.c @@ -363,12 +363,19 @@ static int iso_connect_bis(struct sock *sk) struct iso_conn *conn; struct hci_conn *hcon; struct hci_dev *hdev; + bdaddr_t src, dst; + u8 src_type; int err; - BT_DBG("%pMR", &iso_pi(sk)->src); + lock_sock(sk); + bacpy(&src, &iso_pi(sk)->src); + bacpy(&dst, &iso_pi(sk)->dst); + src_type = iso_pi(sk)->src_type; + release_sock(sk); + + BT_DBG("%pMR", &src); - hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src, - iso_pi(sk)->src_type); + hdev = hci_get_route(&dst, &src, src_type); if (!hdev) return -EHOSTUNREACH; @@ -454,12 +461,19 @@ static int iso_connect_cis(struct sock *sk) struct iso_conn *conn; struct hci_conn *hcon; struct hci_dev *hdev; + bdaddr_t src, dst; + u8 src_type; int err; - BT_DBG("%pMR -> %pMR", &iso_pi(sk)->src, &iso_pi(sk)->dst); + lock_sock(sk); + bacpy(&src, &iso_pi(sk)->src); + bacpy(&dst, &iso_pi(sk)->dst); + src_type = iso_pi(sk)->src_type; + release_sock(sk); + + BT_DBG("%pMR -> %pMR", &src, &dst); - hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src, - iso_pi(sk)->src_type); + hdev = hci_get_route(&dst, &src, src_type); if (!hdev) return -EHOSTUNREACH; @@ -1092,15 +1106,22 @@ static int iso_sock_connect(struct socket *sock, struct sockaddr *addr, static int iso_listen_bis(struct sock *sk) { struct hci_dev *hdev; + bdaddr_t src, dst; + u8 src_type, bc_sid; int err = 0; - BT_DBG("%pMR -> %pMR (SID 0x%2.2x)", &iso_pi(sk)->src, - &iso_pi(sk)->dst, iso_pi(sk)->bc_sid); + lock_sock(sk); + bacpy(&src, &iso_pi(sk)->src); + bacpy(&dst, &iso_pi(sk)->dst); + src_type = iso_pi(sk)->src_type; + bc_sid = iso_pi(sk)->bc_sid; + release_sock(sk); + + BT_DBG("%pMR -> %pMR (SID 0x%2.2x)", &src, &dst, bc_sid); write_lock(&iso_sk_list.lock); - if (__iso_get_sock_listen_by_sid(&iso_pi(sk)->src, &iso_pi(sk)->dst, - iso_pi(sk)->bc_sid)) + if (__iso_get_sock_listen_by_sid(&src, &dst, bc_sid)) err = -EADDRINUSE; write_unlock(&iso_sk_list.lock); @@ -1108,8 +1129,7 @@ static int iso_listen_bis(struct sock *sk) if (err) return err; - hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src, - iso_pi(sk)->src_type); + hdev = hci_get_route(&dst, &src, src_type); if (!hdev) return -EHOSTUNREACH; @@ -1357,9 +1377,16 @@ static void iso_conn_big_sync(struct sock *sk) { int err; struct hci_dev *hdev; + bdaddr_t src, dst; + u8 src_type; + + lock_sock(sk); + bacpy(&src, &iso_pi(sk)->src); + bacpy(&dst, &iso_pi(sk)->dst); + src_type = iso_pi(sk)->src_type; + release_sock(sk); - hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src, - iso_pi(sk)->src_type); + hdev = hci_get_route(&dst, &src, src_type); if (!hdev) return; -- 2.34.1

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[OLK-6.6] [Backport] Bluetooth: ISO: Fix data-race on iso_pi fields in hci_get_route calls
by Hui Tang 04 Aug '26

04 Aug '26

From: SeungJu Cheon <suunj1331(a)gmail.com> mainline inclusion from mainline-v7.1-rc2 commit 9ca7053d6215d89c33f28893bfd1625a32919d3f category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/16200 CVE: CVE-2026-63871 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- iso_connect_bis(), iso_connect_cis(), iso_listen_bis(), and iso_conn_big_sync() call hci_get_route() using iso_pi(sk)->dst, iso_pi(sk)->src, and iso_pi(sk)->src_type without holding lock_sock(). These fields may be modified concurrently by connect() or setsockopt() on the same socket, resulting in data-races reported by KCSAN. Fix this by snapshotting the required fields under lock_sock() before calling hci_get_route(). BUG: KCSAN: data-race in memcmp+0x45/0xb0 race at unknown origin, with read to 0xffff8880122135cf of 1 bytes by task 333 on cpu 1: memcmp+0x45/0xb0 hci_get_route+0x27e/0x490 iso_connect_cis+0x4c/0xa10 iso_sock_connect+0x60e/0xb30 __sys_connect_file+0xbd/0xe0 __sys_connect+0xe0/0x110 __x64_sys_connect+0x40/0x50 x64_sys_call+0xcad/0x1c60 do_syscall_64+0x133/0x590 entry_SYSCALL_64_after_hwframe+0x77/0x7f Fixes: 241f51931c35 ("Bluetooth: ISO: Avoid circular locking dependency") Signed-off-by: SeungJu Cheon <suunj1331(a)gmail.com> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz(a)intel.com> Conflicts: net/bluetooth/iso.c [Context conflicts due to backport] Signed-off-by: Hui Tang <tanghui20(a)huawei.com> --- net/bluetooth/iso.c | 55 +++++++++++++++++++++++++++++++++------------ 1 file changed, 41 insertions(+), 14 deletions(-) diff --git a/net/bluetooth/iso.c b/net/bluetooth/iso.c index 78b0055f0aaf..bd83943d6f27 100644 --- a/net/bluetooth/iso.c +++ b/net/bluetooth/iso.c @@ -363,12 +363,19 @@ static int iso_connect_bis(struct sock *sk) struct iso_conn *conn; struct hci_conn *hcon; struct hci_dev *hdev; + bdaddr_t src, dst; + u8 src_type; int err; - BT_DBG("%pMR", &iso_pi(sk)->src); + lock_sock(sk); + bacpy(&src, &iso_pi(sk)->src); + bacpy(&dst, &iso_pi(sk)->dst); + src_type = iso_pi(sk)->src_type; + release_sock(sk); + + BT_DBG("%pMR", &src); - hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src, - iso_pi(sk)->src_type); + hdev = hci_get_route(&dst, &src, src_type); if (!hdev) return -EHOSTUNREACH; @@ -454,12 +461,19 @@ static int iso_connect_cis(struct sock *sk) struct iso_conn *conn; struct hci_conn *hcon; struct hci_dev *hdev; + bdaddr_t src, dst; + u8 src_type; int err; - BT_DBG("%pMR -> %pMR", &iso_pi(sk)->src, &iso_pi(sk)->dst); + lock_sock(sk); + bacpy(&src, &iso_pi(sk)->src); + bacpy(&dst, &iso_pi(sk)->dst); + src_type = iso_pi(sk)->src_type; + release_sock(sk); + + BT_DBG("%pMR -> %pMR", &src, &dst); - hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src, - iso_pi(sk)->src_type); + hdev = hci_get_route(&dst, &src, src_type); if (!hdev) return -EHOSTUNREACH; @@ -1092,15 +1106,22 @@ static int iso_sock_connect(struct socket *sock, struct sockaddr *addr, static int iso_listen_bis(struct sock *sk) { struct hci_dev *hdev; + bdaddr_t src, dst; + u8 src_type, bc_sid; int err = 0; - BT_DBG("%pMR -> %pMR (SID 0x%2.2x)", &iso_pi(sk)->src, - &iso_pi(sk)->dst, iso_pi(sk)->bc_sid); + lock_sock(sk); + bacpy(&src, &iso_pi(sk)->src); + bacpy(&dst, &iso_pi(sk)->dst); + src_type = iso_pi(sk)->src_type; + bc_sid = iso_pi(sk)->bc_sid; + release_sock(sk); + + BT_DBG("%pMR -> %pMR (SID 0x%2.2x)", &src, &dst, bc_sid); write_lock(&iso_sk_list.lock); - if (__iso_get_sock_listen_by_sid(&iso_pi(sk)->src, &iso_pi(sk)->dst, - iso_pi(sk)->bc_sid)) + if (__iso_get_sock_listen_by_sid(&src, &dst, bc_sid)) err = -EADDRINUSE; write_unlock(&iso_sk_list.lock); @@ -1108,8 +1129,7 @@ static int iso_listen_bis(struct sock *sk) if (err) return err; - hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src, - iso_pi(sk)->src_type); + hdev = hci_get_route(&dst, &src, src_type); if (!hdev) return -EHOSTUNREACH; @@ -1357,9 +1377,16 @@ static void iso_conn_big_sync(struct sock *sk) { int err; struct hci_dev *hdev; + bdaddr_t src, dst; + u8 src_type; + + lock_sock(sk); + bacpy(&src, &iso_pi(sk)->src); + bacpy(&dst, &iso_pi(sk)->dst); + src_type = iso_pi(sk)->src_type; + release_sock(sk); - hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src, - iso_pi(sk)->src_type); + hdev = hci_get_route(&dst, &src, src_type); if (!hdev) return; -- 2.34.1

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[PATCH OLK-5.10 0/2] *** fix CVE-2026-64375 ***
by Lin Ruifeng 04 Aug '26

04 Aug '26

*** fix CVE-2026-64375 *** Eric W. Biederman (1): proc/fd: In proc_fd_link use fget_task Jann Horn (1): proc: protect ptrace_may_access() with exec_update_lock (FD links) fs/proc/base.c | 119 ++++++++++++++++++--------------------------- fs/proc/fd.c | 34 +++++-------- fs/proc/internal.h | 2 +- 3 files changed, 59 insertions(+), 96 deletions(-) -- 2.34.1

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[PATCH OLK-6.6] [Backport] nvmet-tcp: check INIT_FAILED before nvmet_req_uninit in digest error path
by Lu Chentao 04 Aug '26

04 Aug '26

From: Shivam Kumar <kumar.shivam43666(a)gmail.com> stable inclusion from stable-v6.6.145 commit e602c93b25bda4a9d0ff1791a4bdbfdcbb074af1 category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/16831 CVE: CVE-2026-64534 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit 4606467a75cfc16721937272ed29462a750b60c8 upstream. In nvmet_tcp_try_recv_ddgst(), when a data digest mismatch is detected, nvmet_req_uninit() is called unconditionally. However, if the command arrived via the nvmet_tcp_handle_req_failure() path, nvmet_req_init() had returned false and percpu_ref_tryget_live() was never executed. The unconditional percpu_ref_put() inside nvmet_req_uninit() then causes a refcount underflow, leading to a WARNING in percpu_ref_switch_to_atomic_rcu, a use-after-free diagnostic, and eventually a permanent workqueue deadlock. Check cmd->flags & NVMET_TCP_F_INIT_FAILED before calling nvmet_req_uninit(), matching the existing pattern in nvmet_tcp_execute_request(). Reviewed-by: Christoph Hellwig <hch(a)lst.de> Signed-off-by: Shivam Kumar <kumar.shivam43666(a)gmail.com> Signed-off-by: Keith Busch <kbusch(a)kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Lu Chentao <luchentao1(a)huawei.com> --- drivers/nvme/target/tcp.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c index 6ec6912b2b47..e530eebf0bf2 100644 --- a/drivers/nvme/target/tcp.c +++ b/drivers/nvme/target/tcp.c @@ -1288,11 +1288,12 @@ static int nvmet_tcp_try_recv_ddgst(struct nvmet_tcp_queue *queue) if (queue->data_digest && cmd->exp_ddgst != cmd->recv_ddgst) { pr_err("queue %d: cmd %d pdu (%d) data digest error: recv %#x expected %#x\n", queue->idx, cmd->req.cmd->common.command_id, queue->pdu.cmd.hdr.type, le32_to_cpu(cmd->recv_ddgst), le32_to_cpu(cmd->exp_ddgst)); - nvmet_req_uninit(&cmd->req); + if (!(cmd->flags & NVMET_TCP_F_INIT_FAILED)) + nvmet_req_uninit(&cmd->req); nvmet_tcp_free_cmd_buffers(cmd); nvmet_tcp_fatal_error(queue); ret = -EPROTO; goto out; } -- 2.52.0

2 1

[PATCH OLK-5.10] [Backport] nvmet-tcp: check INIT_FAILED before nvmet_req_uninit in digest error path
by Lu Chentao 04 Aug '26

04 Aug '26

From: Shivam Kumar <kumar.shivam43666(a)gmail.com> stable inclusion from stable-v5.10.261 commit 22ec7a9fe9153d2737ee9b2fa6d2e43a1491decf category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/16831 CVE: CVE-2026-64534 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit 4606467a75cfc16721937272ed29462a750b60c8 upstream. In nvmet_tcp_try_recv_ddgst(), when a data digest mismatch is detected, nvmet_req_uninit() is called unconditionally. However, if the command arrived via the nvmet_tcp_handle_req_failure() path, nvmet_req_init() had returned false and percpu_ref_tryget_live() was never executed. The unconditional percpu_ref_put() inside nvmet_req_uninit() then causes a refcount underflow, leading to a WARNING in percpu_ref_switch_to_atomic_rcu, a use-after-free diagnostic, and eventually a permanent workqueue deadlock. Check cmd->flags & NVMET_TCP_F_INIT_FAILED before calling nvmet_req_uninit(), matching the existing pattern in nvmet_tcp_execute_request(). Reviewed-by: Christoph Hellwig <hch(a)lst.de> Signed-off-by: Shivam Kumar <kumar.shivam43666(a)gmail.com> Signed-off-by: Keith Busch <kbusch(a)kernel.org> [shivam: inlined nvmet_tcp_finish_cmd() at the fix site for 5.10.y] Signed-off-by: Shivam Kumar <kumar.shivam43666(a)gmail.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Lu Chentao <luchentao1(a)huawei.com> --- drivers/nvme/target/tcp.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c index 1f048ad19f6a..a2f6e75fd1bf 100644 --- a/drivers/nvme/target/tcp.c +++ b/drivers/nvme/target/tcp.c @@ -1217,11 +1217,13 @@ static int nvmet_tcp_try_recv_ddgst(struct nvmet_tcp_queue *queue) if (queue->data_digest && cmd->exp_ddgst != cmd->recv_ddgst) { pr_err("queue %d: cmd %d pdu (%d) data digest error: recv %#x expected %#x\n", queue->idx, cmd->req.cmd->common.command_id, queue->pdu.cmd.hdr.type, le32_to_cpu(cmd->recv_ddgst), le32_to_cpu(cmd->exp_ddgst)); - nvmet_tcp_finish_cmd(cmd); + if (!(cmd->flags & NVMET_TCP_F_INIT_FAILED)) + nvmet_req_uninit(&cmd->req); + nvmet_tcp_free_cmd_buffers(cmd); nvmet_tcp_fatal_error(queue); ret = -EPROTO; goto out; } -- 2.52.0

2 1

[PATCH OLK-6.6 0/2] CVE-2026-64079: fix NULL dereference in x_tables hook registration
by superdcc97＠163.com 04 Aug '26

04 Aug '26

From: Dong Chenchen <dongchenchen2(a)huawei.com> This series backports the upstream fix for CVE-2026-64079 to OLK-6.6. Patch 1 is the prerequisite that defers the audit register log message until after hooks are wired up. Patch 2 moves hook ops allocation into the xtables core so the table is never visible in the per-netns list with ops=NULL, preventing a NULL dereference during concurrent netns tear-down. The main CVE patch adapts kmemdup_array() to kmemdup(), because kmemdup_array() is not available in OLK-6.6. bugzilla: https://atomgit.com/src-openeuler/kernel/issues/16469 Florian Westphal (2): netfilter: x_tables: allow initial table replace without emitting audit log message netfilter: x_tables: allocate hook ops while under mutex include/linux/netfilter/x_tables.h | 1 + net/ipv4/netfilter/arp_tables.c | 35 ++------------ net/ipv4/netfilter/ip_tables.c | 41 ++-------------- net/ipv6/netfilter/ip6_tables.c | 38 ++------------- net/netfilter/x_tables.c | 77 +++++++++++++++++++++++------- 5 files changed, 74 insertions(+), 118 deletions(-) -- 2.43.0

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[PATCH] [Backport] nvmet-tcp: check INIT_FAILED before nvmet_req_uninit in digest error path
by Lu Chentao 04 Aug '26

04 Aug '26

From: Shivam Kumar <kumar.shivam43666(a)gmail.com> stable inclusion from stable-v5.10.261 commit 22ec7a9fe9153d2737ee9b2fa6d2e43a1491decf category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/16831 CVE: CVE-2026-64534 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit 4606467a75cfc16721937272ed29462a750b60c8 upstream. In nvmet_tcp_try_recv_ddgst(), when a data digest mismatch is detected, nvmet_req_uninit() is called unconditionally. However, if the command arrived via the nvmet_tcp_handle_req_failure() path, nvmet_req_init() had returned false and percpu_ref_tryget_live() was never executed. The unconditional percpu_ref_put() inside nvmet_req_uninit() then causes a refcount underflow, leading to a WARNING in percpu_ref_switch_to_atomic_rcu, a use-after-free diagnostic, and eventually a permanent workqueue deadlock. Check cmd->flags & NVMET_TCP_F_INIT_FAILED before calling nvmet_req_uninit(), matching the existing pattern in nvmet_tcp_execute_request(). Reviewed-by: Christoph Hellwig <hch(a)lst.de> Signed-off-by: Shivam Kumar <kumar.shivam43666(a)gmail.com> Signed-off-by: Keith Busch <kbusch(a)kernel.org> [shivam: inlined nvmet_tcp_finish_cmd() at the fix site for 5.10.y] Signed-off-by: Shivam Kumar <kumar.shivam43666(a)gmail.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Lu Chentao <luchentao1(a)huawei.com> --- drivers/nvme/target/tcp.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c index 1f048ad19f6a..a2f6e75fd1bf 100644 --- a/drivers/nvme/target/tcp.c +++ b/drivers/nvme/target/tcp.c @@ -1217,11 +1217,13 @@ static int nvmet_tcp_try_recv_ddgst(struct nvmet_tcp_queue *queue) if (queue->data_digest && cmd->exp_ddgst != cmd->recv_ddgst) { pr_err("queue %d: cmd %d pdu (%d) data digest error: recv %#x expected %#x\n", queue->idx, cmd->req.cmd->common.command_id, queue->pdu.cmd.hdr.type, le32_to_cpu(cmd->recv_ddgst), le32_to_cpu(cmd->exp_ddgst)); - nvmet_tcp_finish_cmd(cmd); + if (!(cmd->flags & NVMET_TCP_F_INIT_FAILED)) + nvmet_req_uninit(&cmd->req); + nvmet_tcp_free_cmd_buffers(cmd); nvmet_tcp_fatal_error(queue); ret = -EPROTO; goto out; } -- 2.52.0

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[PATCH OLK-6.6 0/2] CVE-2026-64079: fix NULL dereference in x_tables hook registration
by superdcc97＠163.com 04 Aug '26

04 Aug '26

From: Dong Chenchen <dongchenchen2(a)huawei.com> This series backports the upstream fix for CVE-2026-64079 to OLK-6.6. Patch 1 is the prerequisite that defers the audit register log message until after hooks are wired up. Patch 2 moves hook ops allocation into the xtables core so the table is never visible in the per-netns list with ops=NULL, preventing a NULL dereference during concurrent netns tear-down. The main CVE patch adapts kmemdup_array() to kmemdup(), because kmemdup_array() is not available in OLK-6.6. bugzilla: https://atomgit.com/src-openeuler/kernel/issues/16469 Florian Westphal (2): netfilter: x_tables: allow initial table replace without emitting audit log message netfilter: x_tables: allocate hook ops while under mutex include/linux/netfilter/x_tables.h | 1 + net/ipv4/netfilter/arp_tables.c | 35 ++------------ net/ipv4/netfilter/ip_tables.c | 41 ++-------------- net/ipv6/netfilter/ip6_tables.c | 38 ++------------- net/netfilter/x_tables.c | 77 +++++++++++++++++++++++------- 5 files changed, 74 insertions(+), 118 deletions(-) -- 2.43.0

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[PATCH OLK-6.6 0/3] backport olk6.6
by Chen Jinghuang 04 Aug '26

04 Aug '26

*** BLURB HERE *** Chen Jinghuang (3): cpuset: Fix prefer_cpus ineffectiveness by tracking prefer_cpus cgroup/cpuset.c: Comment out early when prefer_cpus cpumask equals cgroup/cpuset.c: Adapt schduler dynamic affinity for hotplug scenarios with cgroup v2 kernel/cgroup/cpuset.c | 23 ++++++++++++++++++----- 1 file changed, 18 insertions(+), 5 deletions(-) -- 2.34.1

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