- Kernel - mailweb.openeuler.org

[PATCH openEuler-1.0-LTS] arm64: errata: Mitigate TLBI errata on NVIDIA Olympus CPU
by Lin Yujun 15 Jul '26

15 Jul '26

mainline inclusion from mainline-v7.1 commit ec7216f92e4ebd485b1c6dc6aa3f6064b71a5768 category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/15600 CVE: CVE-2025-10263 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- NVIDIA Olympus cores are affected by the TLBI completion issue tracked as CVE-2025-10263. The existing ARM64_ERRATUM_4118414 handling already uses ARM64_WORKAROUND_REPEAT_TLBI to issue an additional broadcast TLBI;DSB sequence and ensure affected memory write effects are globally observed. Add MIDR_NVIDIA_OLYMPUS to the repeat-TLBI match list so the same mitigation is enabled on affected Olympus systems. Also document the NVIDIA Olympus erratum in the arm64 silicon errata table and list it in the Kconfig help text. [linyujun: 4.19 does not have ARM64_ERRATUM_4118414 or the arm64_repeat_tlbi_list[] array. Adapt using the existing per-vendor config pattern (same as QCOM_FALKOR_ERRATUM_1009) with ERRATA_MIDR_ALL_VERSIONS.] Signed-off-by: Shanker Donthineni <sdonthineni(a)nvidia.com> Acked-by: Mark Rutland <mark.rutland(a)arm.com> Signed-off-by: Will Deacon <will(a)kernel.org> Conflicts: Documentation/arm64/silicon-errata.txt arch/arm64/Kconfig arch/arm64/include/asm/cputype.h arch/arm64/kernel/cpu_errata.c [主线高版本有 ARM64_ERRATUM_4118414 通用配置和 arm64_repeat_tlbi_list[] 数组， 4.19上是每个厂商各自一个独立 Kconfig 选项（QCOM_FALKOR_ERRATUM_1009 模式）。所以这个补丁需要手动适配，按这个模式新增了NVIDIA_OLYMPUS_ERRATUM_TLBI, 并且新增对应的CPU ID 定义。] Signed-off-by: Lin Yujun <linyujun809(a)h-partners.com> --- Documentation/arm64/silicon-errata.txt | 2 ++ arch/arm64/Kconfig | 15 +++++++++++++++ arch/arm64/include/asm/cputype.h | 2 ++ arch/arm64/kernel/cpu_errata.c | 7 +++++++ 4 files changed, 26 insertions(+) diff --git a/Documentation/arm64/silicon-errata.txt b/Documentation/arm64/silicon-errata.txt index 5016158f5e67..430c0dfbeca1 100644 --- a/Documentation/arm64/silicon-errata.txt +++ b/Documentation/arm64/silicon-errata.txt @@ -82,5 +82,7 @@ stable kernels. | | | | | | Qualcomm Tech. | Kryo/Falkor v1 | E1003 | QCOM_FALKOR_ERRATUM_1003 | | Qualcomm Tech. | Falkor v1 | E1009 | QCOM_FALKOR_ERRATUM_1009 | | Qualcomm Tech. | QDF2400 ITS | E0065 | QCOM_QDF2400_ERRATUM_0065 | | Qualcomm Tech. | Falkor v{1,2} | E1041 | QCOM_FALKOR_ERRATUM_1041 | +| | | | | +| NVIDIA | Olympus Core | T410-OLY-1029 | NVIDIA_OLYMPUS_ERRATUM_TLBI | diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 6498279140fc..3951b0cc8134 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -615,10 +615,25 @@ config QCOM_FALKOR_ERRATUM_1009 TLBI xxIS invalidate maintenance operation. Repeat the TLBI operation one more time to fix the issue. If unsure, say Y. +config NVIDIA_OLYMPUS_ERRATUM_TLBI + bool "NVIDIA Olympus: Completion of affected memory accesses might not be guaranteed by completion of a TLBI" + default y + select ARM64_WORKAROUND_REPEAT_TLBI + help + On NVIDIA Olympus CPU, the completion of a broadcast TLB + invalidation might not guarantee that the memory accesses + expected to be affected by it have completed. Work around + this by issuing an additional broadcast TLBI followed by DSB. + + This is erratum T410-OLY-1029 on the NVIDIA Olympus CPU, + also known as CVE-2025-10263. + + If unsure, say Y. + config QCOM_QDF2400_ERRATUM_0065 bool "QDF2400 E0065: Incorrect GITS_TYPER.ITT_Entry_size" default y help On Qualcomm Datacenter Technologies QDF2400 SoC, ITS hardware reports diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h index bdec50291017..c18e48628509 100644 --- a/arch/arm64/include/asm/cputype.h +++ b/arch/arm64/include/asm/cputype.h @@ -100,10 +100,11 @@ #define QCOM_CPU_PART_FALKOR 0xC00 #define QCOM_CPU_PART_KRYO 0x200 #define NVIDIA_CPU_PART_DENVER 0x003 #define NVIDIA_CPU_PART_CARMEL 0x004 +#define NVIDIA_CPU_PART_OLYMPUS 0x010 #define HISI_CPU_PART_TSV110 0xD01 #define HISI_CPU_PART_TSV200 0xD02 #define PHYTIUM_CPU_PART_1500A 0X660 @@ -135,10 +136,11 @@ #define MIDR_QCOM_FALKOR_V1 MIDR_CPU_MODEL(ARM_CPU_IMP_QCOM, QCOM_CPU_PART_FALKOR_V1) #define MIDR_QCOM_FALKOR MIDR_CPU_MODEL(ARM_CPU_IMP_QCOM, QCOM_CPU_PART_FALKOR) #define MIDR_QCOM_KRYO MIDR_CPU_MODEL(ARM_CPU_IMP_QCOM, QCOM_CPU_PART_KRYO) #define MIDR_NVIDIA_DENVER MIDR_CPU_MODEL(ARM_CPU_IMP_NVIDIA, NVIDIA_CPU_PART_DENVER) #define MIDR_NVIDIA_CARMEL MIDR_CPU_MODEL(ARM_CPU_IMP_NVIDIA, NVIDIA_CPU_PART_CARMEL) +#define MIDR_NVIDIA_OLYMPUS MIDR_CPU_MODEL(ARM_CPU_IMP_NVIDIA, NVIDIA_CPU_PART_OLYMPUS) #define MIDR_HISI_TSV110 MIDR_CPU_MODEL(ARM_CPU_IMP_HISI, HISI_CPU_PART_TSV110) #define MIDR_HISI_TSV200 MIDR_CPU_MODEL(ARM_CPU_IMP_HISI, HISI_CPU_PART_TSV200) #define MIDR_FT_1500A MIDR_CPU_MODEL(ARM_CPU_IMP_PHYTIUM, PHYTIUM_CPU_PART_1500A) #define MIDR_FT_2000AHK MIDR_CPU_MODEL(ARM_CPU_IMP_PHYTIUM, PHYTIUM_CPU_PART_2000AHK) #define MIDR_FT_2000PLUS MIDR_CPU_MODEL(ARM_CPU_IMP_PHYTIUM, PHYTIUM_CPU_PART_2000PLUS) diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c index 3b911e8964a7..9ba8cb0e1824 100644 --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -924,10 +924,17 @@ const struct arm64_cpu_capabilities arm64_errata[] = { .desc = "Qualcomm Technologies Falkor erratum 1009", .capability = ARM64_WORKAROUND_REPEAT_TLBI, ERRATA_MIDR_REV(MIDR_QCOM_FALKOR_V1, 0, 0), }, #endif +#ifdef CONFIG_NVIDIA_OLYMPUS_ERRATUM_TLBI + { + .desc = "NVIDIA Olympus erratum T410-OLY-1029", + .capability = ARM64_WORKAROUND_REPEAT_TLBI, + ERRATA_MIDR_ALL_VERSIONS(MIDR_NVIDIA_OLYMPUS), + }, +#endif #ifdef CONFIG_ARM64_ERRATUM_858921 { /* Cortex-A73 all versions */ .desc = "ARM erratum 858921", .capability = ARM64_WORKAROUND_858921, -- 2.34.1

2 1

[PATCH OLK-6.6 0/3] CVE-2026-53132
by Jinjiang Tu 15 Jul '26

15 Jul '26

Eric Dumazet (1): vsock/virtio: fix potential unbounded skb queue Stefano Garzarella (2): vsock/virtio: fix skb overhead accounting to preserve full buf_alloc vsock/virtio: reset connection on receiving queue overflow net/vmw_vsock/virtio_transport_common.c | 31 ++++++++++++++++++++----- 1 file changed, 25 insertions(+), 6 deletions(-) -- 2.43.0

2 4

[PATCH OLK-6.6] thunderbolt: Validate XDomain request packet size before type cast
by Ze Zuo 14 Jul '26

14 Jul '26

From: Michael Bommarito <michael.bommarito(a)gmail.com> stable inclusion from stable-v6.6.143 commit 0dd61ba03d05187726ecdf9c0e2175a81b9b24f6 category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/16034 CVE: CVE-2026-53147 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit a504b9f2797b739e0304d537e8aa4ce883ecce39 upstream. tb_xdp_handle_request() casts the received packet buffer to protocol-specific structs without verifying that the allocation is large enough for the target type. A peer can send a minimal XDomain packet that passes the generic header length check but is shorter than the struct accessed after the cast, causing out-of- bounds reads from the kmemdup allocation. Plumb the packet length through xdomain_request_work and validate it against the expected struct size before each cast. Fixes: 8e1de7042596 ("thunderbolt: Add support for XDomain lane bonding") Fixes: cdae7c07e3e3 ("thunderbolt: Add support for XDomain properties") Cc: stable(a)vger.kernel.org Assisted-by: Claude:claude-opus-4-7 Signed-off-by: Michael Bommarito <michael.bommarito(a)gmail.com> Signed-off-by: Mika Westerberg <mika.westerberg(a)linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Ze Zuo <zuoze1(a)huawei.com> --- drivers/thunderbolt/xdomain.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/thunderbolt/xdomain.c b/drivers/thunderbolt/xdomain.c index 31fec78a197b..868ef56827af 100644 --- a/drivers/thunderbolt/xdomain.c +++ b/drivers/thunderbolt/xdomain.c @@ -55,6 +55,7 @@ static const char * const state_names[] = { struct xdomain_request_work { struct work_struct work; struct tb_xdp_header *pkg; + size_t pkg_len; struct tb *tb; }; @@ -731,6 +732,7 @@ static void tb_xdp_handle_request(struct work_struct *work) struct xdomain_request_work *xw = container_of(work, typeof(*xw), work); const struct tb_xdp_header *pkg = xw->pkg; const struct tb_xdomain_header *xhdr = &pkg->xd_hdr; + size_t pkg_len = xw->pkg_len; struct tb *tb = xw->tb; struct tb_ctl *ctl = tb->ctl; struct tb_xdomain *xd; @@ -762,7 +764,7 @@ static void tb_xdp_handle_request(struct work_struct *work) switch (pkg->type) { case PROPERTIES_REQUEST: tb_dbg(tb, "%llx: received XDomain properties request\n", route); - if (xd) { + if (xd && pkg_len >= sizeof(struct tb_xdp_properties)) { ret = tb_xdp_properties_response(tb, ctl, xd, sequence, (const struct tb_xdp_properties *)pkg); } @@ -816,7 +818,8 @@ static void tb_xdp_handle_request(struct work_struct *work) tb_dbg(tb, "%llx: received XDomain link state change request\n", route); - if (xd && xd->state == XDOMAIN_STATE_BONDING_UUID_HIGH) { + if (xd && xd->state == XDOMAIN_STATE_BONDING_UUID_HIGH && + pkg_len >= sizeof(struct tb_xdp_link_state_change)) { const struct tb_xdp_link_state_change *lsc = (const struct tb_xdp_link_state_change *)pkg; @@ -868,6 +871,7 @@ tb_xdp_schedule_request(struct tb *tb, const struct tb_xdp_header *hdr, kfree(xw); return false; } + xw->pkg_len = size; xw->tb = tb_domain_get(tb); schedule_work(&xw->work); -- 2.25.1

2 1

[PATCH OLK-6.6] sctp: fix uninit-value in __sctp_rcv_asconf_lookup()
by Ze Zuo 14 Jul '26

14 Jul '26

From: Michael Bommarito <michael.bommarito(a)gmail.com> stable inclusion from stable-v6.6.143 commit 8ce96f1182644079249a24ac7e2ffc32e0301a46 category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/15911 CVE: CVE-2026-53225 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit f8373d7090b745728de66308deeecc67e8d319ce ] __sctp_rcv_asconf_lookup() in net/sctp/input.c only checks that the ASCONF chunk can hold the ADDIP header and a parameter header, then calls af->from_addr_param(), which reads the full address (16 bytes for IPv6) trusting the parameter's declared length. An unauthenticated peer can send a truncated trailing ASCONF chunk that declares an IPv6 address parameter but stops after the 4-byte parameter header; reached from the no-association lookup path, from_addr_param() then reads uninitialized bytes past the parameter. Impact: an unauthenticated SCTP peer makes the receive path read up to 16 bytes of uninitialized memory past a truncated ASCONF address parameter. The sibling __sctp_rcv_init_lookup() bounds parameters with sctp_walk_params(); this path open-codes the fetch and omits the bound. Verify the whole address parameter lies within the chunk before from_addr_param() reads it, the same class of fix as commit 51e5ad549c43 ("net: sctp: fix KMSAN uninit-value in sctp_inq_pop"). Fixes: df2185771439 ("[SCTP]: Update association lookup to look at ASCONF chunks as well") Signed-off-by: Michael Bommarito <michael.bommarito(a)gmail.com> Acked-by: Xin Long <lucien.xin(a)gmail.com> Link: https://patch.msgid.link/20260608122234.459098-1-michael.bommarito@gmail.com Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Ze Zuo <zuoze1(a)huawei.com> --- net/sctp/input.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/net/sctp/input.c b/net/sctp/input.c index 032a10d82302..df5b2187b8fa 100644 --- a/net/sctp/input.c +++ b/net/sctp/input.c @@ -1204,6 +1204,14 @@ static struct sctp_association *__sctp_rcv_asconf_lookup( /* Skip over the ADDIP header and find the Address parameter */ param = (union sctp_addr_param *)(asconf + 1); + /* The whole address parameter must lie within the chunk before + * af->from_addr_param() reads the variable-length address; otherwise a + * truncated trailing ASCONF chunk lets it read uninitialized bytes past + * the parameter. + */ + if (sizeof(*asconf) + ntohs(param->p.length) > ntohs(ch->length)) + return NULL; + af = sctp_get_af_specific(param_type2af(param->p.type)); if (unlikely(!af)) return NULL; -- 2.25.1

2 1

[PATCH OLK-6.6] hv_netvsc: use kmap_local_page in netvsc_copy_to_send_buf
by Ze Zuo 14 Jul '26

14 Jul '26

From: Anton Leontev <leontyevantony(a)gmail.com> stable inclusion from stable-v6.6.143 commit 09b8a7aa5a341bb345dc492aac139525efa13515 category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/15885 CVE: CVE-2026-53199 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 004e9ecfe6c5384f9e0b2f6f6389d42ec22789af ] netvsc_copy_to_send_buf() copies page buffer entries into the VMBus send buffer using phys_to_virt() on the entry PFN. Entries for the RNDIS header and the skb linear data come from kmalloc'd memory and are always in the kernel direct map, but entries for skb fragments reference page cache or user pages, which on 32-bit x86 with CONFIG_HIGHMEM=y can live above the LOWMEM boundary. For such a page phys_to_virt() returns an address outside the direct map and the subsequent memcpy() faults on the transmit softirq path, which is fatal. Map the pages with kmap_local_page() instead, handling two properties of the page buffer entries: - pb[i].pfn is a Hyper-V PFN at HV_HYP_PAGE_SIZE (4K) granularity, not a native PFN. Reconstruct the physical address first and derive the native page from it, so the mapping stays correct where PAGE_SIZE > HV_HYP_PAGE_SIZE (e.g. arm64 with 64K pages). - Since commit 41a6328b2c55 ("hv_netvsc: Preserve contiguous PFN grouping in the page buffer array"), an entry describes a full physically contiguous fragment and pb[i].len can exceed PAGE_SIZE, while kmap_local_page() maps a single page. Copy page by page, splitting at native page boundaries. The copy path only handles packets smaller than the send section size (6144 bytes by default); larger packets take the cp_partial path where only the RNDIS header is copied. So entries here are bounded by the section size and a copy is split at most once on 4K-page systems. On !CONFIG_HIGHMEM configs kmap_local_page() folds to page_address() and no mapping work is added. Fixes: c25aaf814a63 ("hyperv: Enable sendbuf mechanism on the send path") Cc: stable(a)vger.kernel.org Signed-off-by: Anton Leontev <leontyevantony(a)gmail.com> Link: https://patch.msgid.link/20260604165938.32033-1-leontyevantony@gmail.com Signed-off-by: Paolo Abeni <pabeni(a)redhat.com> [ adapted `phys_to_page(paddr)` to `pfn_to_page(PHYS_PFN(paddr))` ] Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Ze Zuo <zuoze1(a)huawei.com> --- drivers/net/hyperv/netvsc.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c index 61584b40cb03..2f09b07d809e 100644 --- a/drivers/net/hyperv/netvsc.c +++ b/drivers/net/hyperv/netvsc.c @@ -12,6 +12,7 @@ #include <linux/sched.h> #include <linux/wait.h> #include <linux/mm.h> +#include <linux/highmem.h> #include <linux/delay.h> #include <linux/io.h> #include <linux/slab.h> @@ -957,12 +958,22 @@ static void netvsc_copy_to_send_buf(struct netvsc_device *net_device, } for (i = 0; i < page_count; i++) { - char *src = phys_to_virt(pb[i].pfn << HV_HYP_PAGE_SHIFT); - u32 offset = pb[i].offset; + phys_addr_t paddr = (pb[i].pfn << HV_HYP_PAGE_SHIFT) + + pb[i].offset; u32 len = pb[i].len; - memcpy(dest, (src + offset), len); - dest += len; + while (len) { + struct page *page = pfn_to_page(PHYS_PFN(paddr)); + u32 off = offset_in_page(paddr); + u32 chunk = min_t(u32, len, PAGE_SIZE - off); + char *src = kmap_local_page(page); + + memcpy(dest, src + off, chunk); + kunmap_local(src); + dest += chunk; + paddr += chunk; + len -= chunk; + } } if (padding) -- 2.25.1

2 1

[PATCH OLK-6.6] sctp: diag: reject stale associations in dump_one path
by Ze Zuo 14 Jul '26

14 Jul '26

From: Zhao Zhang <zzhan461(a)ucr.edu> stable inclusion from stable-v6.6.143 commit e97c2a535e23ed0fdd2660993fb3f10d9535c9bc category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/15622 CVE: CVE-2026-52917 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit 5eba3e48d78edd7551b992cb7ba687019b3a78da upstream. The SCTP exact sock_diag lookup can hold a transport reference, block on lock_sock(sk), and then resume after sctp_association_free() has marked the association dead and freed its bind address list. When that happens, inet_assoc_attr_size() and inet_diag_msg_sctpasoc_fill() can still dereference association state that is no longer valid for reporting. In particular, inet_diag_msg_sctpasoc_fill() may read an empty bind-address list as a real sctp_sockaddr_entry and trigger an out-of-bounds read from unrelated association memory. Reject the association after taking the socket lock if it has been reaped or detached from the endpoint, and report the lookup as stale. This keeps the exact dump-one path from formatting torn association state. Fixes: 8f840e47f190 ("sctp: add the sctp_diag.c file") Cc: stable(a)kernel.org Reported-by: Yuan Tan <yuantan098(a)gmail.com> Reported-by: Yifan Wu <yifanwucs(a)gmail.com> Reported-by: Juefei Pu <tomapufckgml(a)gmail.com> Reported-by: Zhengchuan Liang <zcliangcn(a)gmail.com> Reported-by: Xin Liu <bird(a)lzu.edu.cn> Signed-off-by: Zhao Zhang <zzhan461(a)ucr.edu> Signed-off-by: Ren Wei <n05ec(a)lzu.edu.cn> Acked-by: Xin Long <lucien.xin(a)gmail.com> Link: https://patch.msgid.link/fac6043fa20a2ff68e12958c431836f692c51268.178011382… Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Ze Zuo <zuoze1(a)huawei.com> --- net/sctp/diag.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/net/sctp/diag.c b/net/sctp/diag.c index 5a43f25478d0..ff4f8a679ffc 100644 --- a/net/sctp/diag.c +++ b/net/sctp/diag.c @@ -266,15 +266,15 @@ static int sctp_sock_dump_one(struct sctp_endpoint *ep, struct sctp_transport *t lock_sock(sk); - rep = nlmsg_new(inet_assoc_attr_size(sk, assoc), GFP_KERNEL); - if (!rep) { - release_sock(sk); - return -ENOMEM; + if (ep != assoc->ep || assoc->base.dead) { + err = -ESTALE; + goto out_unlock; } - if (ep != assoc->ep) { - err = -EAGAIN; - goto out; + rep = nlmsg_new(inet_assoc_attr_size(sk, assoc), GFP_KERNEL); + if (!rep) { + err = -ENOMEM; + goto out_unlock; } err = inet_sctp_diag_fill(sk, assoc, rep, req, sk_user_ns(NETLINK_CB(skb).sk), @@ -289,8 +289,9 @@ static int sctp_sock_dump_one(struct sctp_endpoint *ep, struct sctp_transport *t return nlmsg_unicast(sock_net(skb->sk)->diag_nlsk, rep, NETLINK_CB(skb).portid); out: - release_sock(sk); kfree_skb(rep); +out_unlock: + release_sock(sk); return err; } -- 2.25.1

2 1

[PATCH OLK-6.6 00/32] backport minios patches from linux mainline
by Qinxin Xia 14 Jul '26

14 Jul '26

From: Hongye Lin <linhongye(a)h-partners.com> backport minios patches from linux mainline Mark Rutland (8): arm64/fpsimd: Add fpsimd_save_and_flush_current_state() arm64/fpsimd: signal32: Always save+flush state early arm64/fpsimd: signal: Always save+flush state early arm64: ptrace: fix partial SETREGSET for NT_ARM_FPMR arm64/fpsimd: Reset FPMR upon exec() arm64/fpsimd: Don't corrupt FPMR when streaming mode changes arm64/fpsimd: Do not discard modified SVE state arm64/fpsimd: Avoid warning when sve_to_fpsimd() is unused Qinxin Xia (21): arm64/sysreg: Add definition for ID_AA64PFR2_EL1 arm64/sysreg: Add definition for ID_AA64ISAR3_EL1 arm64/sysreg: Add definition for ID_AA64FPFR0_EL1 arm64/sysreg: Add definition for FPMR arm64/sysreg: Add EnFPM field for SCTLR_EL1 and HCRX_EL2 arm64/sysreg: Add LUT field for ID_AA64ISAR2_EL1 arm64/cpufeature: Hook new identification registers up to cpufeature arm64/hwcap: Define hwcaps for 2023 DPISA features kselftest/arm64: Add basic FPMR test kselftest/arm64: Handle FPMR context in generic signal frame parser kselftest/arm64: Add 2023 DPISA hwcap test coverage arm64: Kconfig: Detect toolchain support for LSUI arm64: cpufeature: add FEAT_LSUI arm64/signal: Add FPMR signal handling arm64/ptrace: Expose FPMR via ptrace Add support "arm64.nocnp" for start option arm64/fpsimd: Support FEAT_FPMR arm64: syscall: switch to fpsimd_syscall_enter() arm64/fpsimd: Enable host kernel access to FPMR KVM: arm64: Properly save/restore HCRX_EL2 KVM: arm64: Kill HCRX_HOST_FLAGS Yifan Wu (3): arm64/hwcap: Add support for FEAT_CMPBR kselftest/arm64: Add FEAT_CMPBR to the hwcap selftest arm64/sysreg: Update ID_AA64ISAR2_EL1 for FEAT_CMPBR Documentation/arch/arm64/elf_hwcaps.rst | 30 +++++ arch/arm64/Kconfig | 5 + arch/arm64/include/asm/cpu.h | 3 + arch/arm64/include/asm/cpufeature.h | 6 + arch/arm64/include/asm/el2_setup.h | 2 +- arch/arm64/include/asm/fpsimd.h | 7 +- arch/arm64/include/asm/hwcap.h | 10 ++ arch/arm64/include/asm/kvm_arm.h | 1 - arch/arm64/include/asm/kvm_host.h | 1 + arch/arm64/include/asm/processor.h | 4 + arch/arm64/include/asm/signal_common.h | 20 ++- arch/arm64/include/uapi/asm/hwcap.h | 10 ++ arch/arm64/include/uapi/asm/sigcontext.h | 8 ++ arch/arm64/kernel/cpufeature.c | 70 +++++++++- arch/arm64/kernel/cpuinfo.c | 3 + arch/arm64/kernel/entry-common.c | 50 +++++-- arch/arm64/kernel/fpsimd.c | 74 +++++------ arch/arm64/kernel/hwcap_str.h | 10 ++ arch/arm64/kernel/idreg-override.c | 11 ++ arch/arm64/kernel/ptrace.c | 44 +++++++ arch/arm64/kernel/signal.c | 102 ++++++++------- arch/arm64/kernel/signal32.c | 11 +- arch/arm64/kvm/fpsimd.c | 1 + arch/arm64/kvm/hyp/include/hyp/switch.h | 12 +- arch/arm64/tools/cpucaps | 2 + arch/arm64/tools/sysreg | 122 +++++++++++++++++- include/uapi/linux/elf.h | 1 + tools/testing/selftests/arm64/abi/hwcap.c | 116 +++++++++++++++++ .../testing/selftests/arm64/signal/.gitignore | 1 + .../arm64/signal/testcases/fpmr_siginfo.c | 82 ++++++++++++ .../arm64/signal/testcases/testcases.c | 8 ++ .../arm64/signal/testcases/testcases.h | 1 + 32 files changed, 710 insertions(+), 118 deletions(-) create mode 100644 tools/testing/selftests/arm64/signal/testcases/fpmr_siginfo.c -- 2.33.0

2 33

[PATCH] ext4: validate readdir offset before accessing dirent
by Yao Kai 14 Jul '26

14 Jul '26

hulk inclusion category: bugfix bugzilla: https://atomgit.com/openeuler/kernel/issues/9553 CVE: NA ------------------------ A corrupted directory can trigger the following KASAN report when ext4_readdir() resumes from an invalid position: BUG: KASAN: use-after-free in __ext4_check_dir_entry+0x5ef/0x820 Read of size 2 at addr ffff88810a646000 by task repro_linear/509 Call Trace: <TASK> dump_stack_lvl+0x53/0x70 print_report+0xd0/0x630 kasan_report+0xce/0x100 __ext4_check_dir_entry+0x5ef/0x820 ext4_readdir+0xcde/0x2b70 iterate_dir+0x1a1/0x520 __x64_sys_getdents64+0x12b/0x220 do_syscall_64+0xf9/0x540 entry_SYSCALL_64_after_hwframe+0x77/0x7f </TASK> KASAN reports use-after-free because the out-of-bounds access lands in an adjacent freed page. The directory buffer itself is still referenced. ext4_dir_llseek() invalidates the directory cookie so that ext4_readdir() rescans directory entries from the start of the block. The rescan checks only the lower bound of rec_len before advancing. A corrupted rec_len can therefore place the offset where the block has insufficient space for a complete directory entry. The rescan itself may dereference that truncated entry, or the main loop may pass it to __ext4_check_dir_entry(). The latter reads de->rec_len before validating the range. For example: block offset 0 4092 4096 |---- de1.rec_len = 4092 -----|----| de2.inode | de2.rec_len ^ OOB, reported as UAF de2 starts at offset 4092 in this 4 KiB block. Its four-byte inode fits in the block, but its rec_len starts at offset 4096 and crosses the boundary. The minimum safe length is inode-dependent. Encrypted and casefolded directory entries need eight additional hash bytes, while a valid metadata checksum tail is only 12 bytes. Cache the metadata checksum feature state and derive the minimum directory entry length from the on-disk format. Use it to bound both the rescan and the offset passed to the main loop. Report an offset in a truncated block tail and skip the remainder of the block, while continuing to accept an offset exactly at the block boundary. Reported-by: syzbot+5322c5c260eb44d209ed(a)syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=5322c5c260eb44d209ed Fixes: ac27a0ec112a ("[PATCH] ext4: initial copy of files from ext3") Signed-off-by: Yao Kai <yaokai34(a)huawei.com> Reviewed-by: Zhihao Cheng <chengzhihao1(a)huawei.com> Reviewed-by: Jan Kara <jack(a)suse.cz> Reviewed-by: Zhang Yi <yi.zhang(a)huawei.com> --- fs/ext4/dir.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c index 513360234b14..c2e0b7c9562e 100644 --- a/fs/ext4/dir.c +++ b/fs/ext4/dir.c @@ -219,7 +219,9 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx) * dirent right now. Scan from the start of the block * to make sure. */ if (!inode_eq_iversion(inode, file->f_version)) { - for (i = 0; i < sb->s_blocksize && i < offset; ) { + for (i = 0; + i <= sb->s_blocksize - EXT4_DIR_REC_LEN(1) && + i < offset;) { de = (struct ext4_dir_entry_2 *) (bh->b_data + i); /* It's too expensive to do a full @@ -240,6 +242,16 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx) file->f_version = inode_query_iversion(inode); } + if (unlikely(offset < sb->s_blocksize && + offset > sb->s_blocksize - EXT4_DIR_REC_LEN(1))) { + EXT4_ERROR_FILE(file, bh->b_blocknr, + "bad entry in directory: %s - offset=%u, size=%lu", + "directory entry too close to block end", + offset, sb->s_blocksize); + ctx->pos = round_up(ctx->pos, sb->s_blocksize); + goto next_block; + } + while (ctx->pos < inode->i_size && offset < sb->s_blocksize) { de = (struct ext4_dir_entry_2 *) (bh->b_data + offset); @@ -285,6 +297,7 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx) ctx->pos += ext4_rec_len_from_disk(de->rec_len, sb->s_blocksize); } +next_block: if ((ctx->pos < inode->i_size) && !dir_relax_shared(inode)) goto done; brelse(bh); -- 2.34.1

1 0

[PATCH OLK-6.6 0/2] fix CVE-2026-53132
by Jinjiang Tu 14 Jul '26

14 Jul '26

Eric Dumazet (1): vsock/virtio: fix potential unbounded skb queue Stefano Garzarella (1): vsock/virtio: fix skb overhead accounting to preserve full buf_alloc net/vmw_vsock/virtio_transport_common.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) -- 2.43.0

2 3

[PATCH] ext4: validate readdir offset before accessing dirent
by Yao Kai 14 Jul '26

14 Jul '26

hulk inclusion category: bugfix bugzilla: https://atomgit.com/openeuler/kernel/issues/9553 CVE: NA ------------------------ A corrupted directory can trigger the following KASAN report when ext4_readdir() resumes from an invalid position: BUG: KASAN: use-after-free in __ext4_check_dir_entry+0x5ef/0x820 Read of size 2 at addr ffff88810a646000 by task repro_linear/509 Call Trace: <TASK> dump_stack_lvl+0x53/0x70 print_report+0xd0/0x630 kasan_report+0xce/0x100 __ext4_check_dir_entry+0x5ef/0x820 ext4_readdir+0xcde/0x2b70 iterate_dir+0x1a1/0x520 __x64_sys_getdents64+0x12b/0x220 do_syscall_64+0xf9/0x540 entry_SYSCALL_64_after_hwframe+0x77/0x7f </TASK> KASAN reports use-after-free because the out-of-bounds access lands in an adjacent freed page. The directory buffer itself is still referenced. ext4_dir_llseek() invalidates the directory cookie so that ext4_readdir() rescans directory entries from the start of the block. The rescan checks only the lower bound of rec_len before advancing. A corrupted rec_len can therefore place the offset where the block has insufficient space for a complete directory entry. The rescan itself may dereference that truncated entry, or the main loop may pass it to __ext4_check_dir_entry(). The latter reads de->rec_len before validating the range. For example: block offset 0 4092 4096 |---- de1.rec_len = 4092 -----|----| de2.inode | de2.rec_len ^ OOB, reported as UAF de2 starts at offset 4092 in this 4 KiB block. Its four-byte inode fits in the block, but its rec_len starts at offset 4096 and crosses the boundary. The minimum safe length is inode-dependent. Encrypted and casefolded directory entries need eight additional hash bytes, while a valid metadata checksum tail is only 12 bytes. Cache the metadata checksum feature state and derive the minimum directory entry length from the on-disk format. Use it to bound both the rescan and the offset passed to the main loop. Report an offset in a truncated block tail and skip the remainder of the block, while continuing to accept an offset exactly at the block boundary. Reported-by: syzbot+5322c5c260eb44d209ed(a)syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=5322c5c260eb44d209ed Fixes: ac27a0ec112a ("[PATCH] ext4: initial copy of files from ext3") Signed-off-by: Yao Kai <yaokai34(a)huawei.com> Reviewed-by: Zhihao Cheng <chengzhihao1(a)huawei.com> Reviewed-by: Jan Kara <jack(a)suse.cz> Reviewed-by: Zhang Yi <yi.zhang(a)huawei.com> --- fs/ext4/dir.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c index 5def57966807..9c5ff45bfd6b 100644 --- a/fs/ext4/dir.c +++ b/fs/ext4/dir.c @@ -216,7 +216,9 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx) * dirent right now. Scan from the start of the block * to make sure. */ if (!inode_eq_iversion(inode, file->f_version)) { - for (i = 0; i < sb->s_blocksize && i < offset; ) { + for (i = 0; + i <= sb->s_blocksize - EXT4_DIR_REC_LEN(1) && + i < offset;) { de = (struct ext4_dir_entry_2 *) (bh->b_data + i); /* It's too expensive to do a full @@ -237,6 +239,16 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx) file->f_version = inode_query_iversion(inode); } + if (unlikely(offset < sb->s_blocksize && + offset > sb->s_blocksize - EXT4_DIR_REC_LEN(1))) { + EXT4_ERROR_FILE(file, bh->b_blocknr, + "bad entry in directory: %s - offset=%u, size=%lu", + "directory entry too close to block end", + offset, sb->s_blocksize); + ctx->pos = round_up(ctx->pos, sb->s_blocksize); + goto next_block; + } + while (ctx->pos < inode->i_size && offset < sb->s_blocksize) { de = (struct ext4_dir_entry_2 *) (bh->b_data + offset); @@ -282,6 +294,7 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx) ctx->pos += ext4_rec_len_from_disk(de->rec_len, sb->s_blocksize); } +next_block: if ((ctx->pos < inode->i_size) && !dir_relax_shared(inode)) goto done; brelse(bh); -- 2.34.1

1 0