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[PATCH OLK-5.10] NFSD: Protect against send buffer overflow in NFSv3 READ
by Li Lingfeng 26 Sep '25

26 Sep '25

From: Chuck Lever <chuck.lever(a)oracle.com> mainline inclusion from mainline-v6.1-rc1 commit fa6be9cc6e80ec79892ddf08a8c10cabab9baf38 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/ICYBVR CVE: CVE-2022-50345 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- Since before the git era, NFSD has conserved the number of pages held by each nfsd thread by combining the RPC receive and send buffers into a single array of pages. This works because there are no cases where an operation needs a large RPC Call message and a large RPC Reply at the same time. Once an RPC Call has been received, svc_process() updates svc_rqst::rq_res to describe the part of rq_pages that can be used for constructing the Reply. This means that the send buffer (rq_res) shrinks when the received RPC record containing the RPC Call is large. A client can force this shrinkage on TCP by sending a correctly- formed RPC Call header contained in an RPC record that is excessively large. The full maximum payload size cannot be constructed in that case. Cc: <stable(a)vger.kernel.org> Signed-off-by: Chuck Lever <chuck.lever(a)oracle.com> Reviewed-by: Jeff Layton <jlayton(a)kernel.org> Signed-off-by: Chuck Lever <chuck.lever(a)oracle.com> Conflicts: fs/nfsd/nfs3proc.c [Commit 507df40ebf31 ("NFSD: Hoist rq_vec preparation into nfsd_read()") removed the definition of len in nfsd3_proc_read().] Signed-off-by: Li Lingfeng <lilingfeng3(a)huawei.com> --- fs/nfsd/nfs3proc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c index 0b61080d6234..345b667aeadf 100644 --- a/fs/nfsd/nfs3proc.c +++ b/fs/nfsd/nfs3proc.c @@ -144,14 +144,14 @@ nfsd3_proc_read(struct svc_rqst *rqstp) { struct nfsd3_readargs *argp = rqstp->rq_argp; struct nfsd3_readres *resp = rqstp->rq_resp; - u32 max_blocksize = svc_max_payload(rqstp); dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n", SVCFH_fmt(&argp->fh), (unsigned long) argp->count, (unsigned long long) argp->offset); - argp->count = min_t(u32, argp->count, max_blocksize); + argp->count = min_t(u32, argp->count, svc_max_payload(rqstp)); + argp->count = min_t(u32, argp->count, rqstp->rq_res.buflen); if (argp->offset > (u64)OFFSET_MAX) argp->offset = (u64)OFFSET_MAX; if (argp->offset + argp->count > (u64)OFFSET_MAX) -- 2.46.1

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[PATCH openEuler-1.0-LTS] NFSD: Protect against send buffer overflow in NFSv3 READ
by Li Lingfeng 26 Sep '25

26 Sep '25

From: Chuck Lever <chuck.lever(a)oracle.com> mainline inclusion from mainline-v6.1-rc1 commit fa6be9cc6e80ec79892ddf08a8c10cabab9baf38 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/ICYBVR CVE: CVE-2022-50345 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- Since before the git era, NFSD has conserved the number of pages held by each nfsd thread by combining the RPC receive and send buffers into a single array of pages. This works because there are no cases where an operation needs a large RPC Call message and a large RPC Reply at the same time. Once an RPC Call has been received, svc_process() updates svc_rqst::rq_res to describe the part of rq_pages that can be used for constructing the Reply. This means that the send buffer (rq_res) shrinks when the received RPC record containing the RPC Call is large. A client can force this shrinkage on TCP by sending a correctly- formed RPC Call header contained in an RPC record that is excessively large. The full maximum payload size cannot be constructed in that case. Cc: <stable(a)vger.kernel.org> Signed-off-by: Chuck Lever <chuck.lever(a)oracle.com> Reviewed-by: Jeff Layton <jlayton(a)kernel.org> Signed-off-by: Chuck Lever <chuck.lever(a)oracle.com> Conflicts: fs/nfsd/nfs3proc.c [Commit be63bd2ac6bb ("NFSD: Update READ3arg decoder to use struct xdr_stream") use argp->count directly instead of cnt.] Signed-off-by: Li Lingfeng <lilingfeng3(a)huawei.com> --- fs/nfsd/nfs3proc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c index c9cf46e0c040..c30f76b27eff 100644 --- a/fs/nfsd/nfs3proc.c +++ b/fs/nfsd/nfs3proc.c @@ -153,9 +153,9 @@ nfsd3_proc_read(struct svc_rqst *rqstp) struct nfsd3_readargs *argp = rqstp->rq_argp; struct nfsd3_readres *resp = rqstp->rq_resp; __be32 nfserr; - u32 max_blocksize = svc_max_payload(rqstp); - unsigned long cnt = min(argp->count, max_blocksize); + unsigned long cnt = min(argp->count, svc_max_payload(rqstp)); + cnt = min_t(u32, cnt, rqstp->rq_res.buflen); dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n", SVCFH_fmt(&argp->fh), (unsigned long) argp->count, -- 2.31.1

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[openEuler-1.0-LTS] [Backport] wifi: mwifiex: avoid possible NULL skb pointer dereference
by Zhang Yuwei 26 Sep '25

26 Sep '25

From: Dmitry Antipov <dmantipov(a)yandex.ru> mainline inclusion from mainline-v6.6-rc1 commit 35a7a1ce7c7d61664ee54f5239a1f120ab95a87e category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/ICYQMB CVE: CVE-2023-53384 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- [ Upstream commit 35a7a1ce7c7d61664ee54f5239a1f120ab95a87e ] In 'mwifiex_handle_uap_rx_forward()', always check the value returned by 'skb_copy()' to avoid potential NULL pointer dereference in 'mwifiex_uap_queue_bridged_pkt()', and drop original skb in case of copying failure. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: 838e4f449297 ("mwifiex: improve uAP RX handling") Acked-by: Brian Norris <briannorris(a)chromium.org> Signed-off-by: Dmitry Antipov <dmantipov(a)yandex.ru> Signed-off-by: Kalle Valo <kvalo(a)kernel.org> Link: https://lore.kernel.org/r/20230814095041.16416-1-dmantipov@yandex.ru Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/net/wireless/marvell/mwifiex/uap_txrx.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/marvell/mwifiex/uap_txrx.c b/drivers/net/wireless/marvell/mwifiex/uap_txrx.c index 5ce85d5727e4..5256e254f547 100644 --- a/drivers/net/wireless/marvell/mwifiex/uap_txrx.c +++ b/drivers/net/wireless/marvell/mwifiex/uap_txrx.c @@ -256,7 +256,15 @@ int mwifiex_handle_uap_rx_forward(struct mwifiex_private *priv, if (is_multicast_ether_addr(ra)) { skb_uap = skb_copy(skb, GFP_ATOMIC); - mwifiex_uap_queue_bridged_pkt(priv, skb_uap); + if (likely(skb_uap)) { + mwifiex_uap_queue_bridged_pkt(priv, skb_uap); + } else { + mwifiex_dbg(adapter, ERROR, + "failed to copy skb for uAP\n"); + priv->stats.rx_dropped++; + dev_kfree_skb_any(skb); + return -1; + } } else { if (mwifiex_get_sta_entry(priv, ra)) { /* Requeue Intra-BSS packet */ -- 2.22.0

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[PATCH OLK-6.6] bpf: Tell memcg to use allow_spinning=false path in bpf_timer_init()
by Pu Lehui 26 Sep '25

26 Sep '25

From: Peilin Ye <yepeilin(a)google.com> stable inclusion from stable-v6.6.107 commit 449682e76f32601f211816d3e2100bed87e67a4c category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/ICZCJ4 CVE: CVE-2025-39886 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 6d78b4473cdb08b74662355a9e8510bde09c511e ] Currently, calling bpf_map_kmalloc_node() from __bpf_async_init() can cause various locking issues; see the following stack trace (edited for style) as one example: ... [10.011566] do_raw_spin_lock.cold [10.011570] try_to_wake_up (5) double-acquiring the same [10.011575] kick_pool rq_lock, causing a hardlockup [10.011579] __queue_work [10.011582] queue_work_on [10.011585] kernfs_notify [10.011589] cgroup_file_notify [10.011593] try_charge_memcg (4) memcg accounting raises an [10.011597] obj_cgroup_charge_pages MEMCG_MAX event [10.011599] obj_cgroup_charge_account [10.011600] __memcg_slab_post_alloc_hook [10.011603] __kmalloc_node_noprof ... [10.011611] bpf_map_kmalloc_node [10.011612] __bpf_async_init [10.011615] bpf_timer_init (3) BPF calls bpf_timer_init() [10.011617] bpf_prog_xxxxxxxxxxxxxxxx_fcg_runnable [10.011619] bpf__sched_ext_ops_runnable [10.011620] enqueue_task_scx (2) BPF runs with rq_lock held [10.011622] enqueue_task [10.011626] ttwu_do_activate [10.011629] sched_ttwu_pending (1) grabs rq_lock ... The above was reproduced on bpf-next (b338cf849ec8) by modifying ./tools/sched_ext/scx_flatcg.bpf.c to call bpf_timer_init() during ops.runnable(), and hacking the memcg accounting code a bit to make a bpf_timer_init() call more likely to raise an MEMCG_MAX event. We have also run into other similar variants (both internally and on bpf-next), including double-acquiring cgroup_file_kn_lock, the same worker_pool::lock, etc. As suggested by Shakeel, fix this by using __GFP_HIGH instead of GFP_ATOMIC in __bpf_async_init(), so that e.g. if try_charge_memcg() raises an MEMCG_MAX event, we call __memcg_memory_event() with @allow_spinning=false and avoid calling cgroup_file_notify() there. Depends on mm patch "memcg: skip cgroup_file_notify if spinning is not allowed": https://lore.kernel.org/bpf/20250905201606.66198-1-shakeel.butt@linux.dev/ v0 approach s/bpf_map_kmalloc_node/bpf_mem_alloc/ https://lore.kernel.org/bpf/20250905061919.439648-1-yepeilin@google.com/ v1 approach: https://lore.kernel.org/bpf/20250905234547.862249-1-yepeilin@google.com/ Fixes: b00628b1c7d5 ("bpf: Introduce bpf timers.") Suggested-by: Shakeel Butt <shakeel.butt(a)linux.dev> Signed-off-by: Peilin Ye <yepeilin(a)google.com> Link: https://lore.kernel.org/r/20250909095222.2121438-1-yepeilin@google.com Signed-off-by: Alexei Starovoitov <ast(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Pu Lehui <pulehui(a)huawei.com> --- kernel/bpf/helpers.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c index 19a13ed5406b..f40085f4de31 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -1222,8 +1222,11 @@ static int __bpf_async_init(struct bpf_async_kern *async, struct bpf_map *map, u goto out; } - /* allocate hrtimer via map_kmalloc to use memcg accounting */ - cb = bpf_map_kmalloc_node(map, size, GFP_ATOMIC, map->numa_node); + /* Allocate via bpf_map_kmalloc_node() for memcg accounting. Until + * kmalloc_nolock() is available, avoid locking issues by using + * __GFP_HIGH (GFP_ATOMIC & ~__GFP_RECLAIM). + */ + cb = bpf_map_kmalloc_node(map, size, __GFP_HIGH, map->numa_node); if (!cb) { ret = -ENOMEM; goto out; -- 2.34.1

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[PATCH OLK-5.10] vxlan: Fix NPD when refreshing an FDB entry with a nexthop object
by Xiaomeng Zhang 26 Sep '25

26 Sep '25

From: Ido Schimmel <idosch(a)nvidia.com> mainline inclusion from mainline-v6.17-rc5 commit 6ead38147ebb813f08be6ea8ef547a0e4c09559a category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/ICYXVU CVE: CVE-2025-39851 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- VXLAN FDB entries can point to either a remote destination or an FDB nexthop group. The latter is usually used in EVPN deployments where learning is disabled. However, when learning is enabled, an incoming packet might try to refresh an FDB entry that points to an FDB nexthop group and therefore does not have a remote. Such packets should be dropped, but they are only dropped after dereferencing the non-existent remote, resulting in a NPD [1] which can be reproduced using [2]. Fix by dropping such packets earlier. Remove the misleading comment from first_remote_rcu(). [1] BUG: kernel NULL pointer dereference, address: 0000000000000000 [...] CPU: 13 UID: 0 PID: 361 Comm: mausezahn Not tainted 6.17.0-rc1-virtme-g9f6b606b6b37 #1 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-4.fc41 04/01/2014 RIP: 0010:vxlan_snoop+0x98/0x1e0 [...] Call Trace: <TASK> vxlan_encap_bypass+0x209/0x240 encap_bypass_if_local+0xb1/0x100 vxlan_xmit_one+0x1375/0x17e0 vxlan_xmit+0x6b4/0x15f0 dev_hard_start_xmit+0x5d/0x1c0 __dev_queue_xmit+0x246/0xfd0 packet_sendmsg+0x113a/0x1850 __sock_sendmsg+0x38/0x70 __sys_sendto+0x126/0x180 __x64_sys_sendto+0x24/0x30 do_syscall_64+0xa4/0x260 entry_SYSCALL_64_after_hwframe+0x4b/0x53 [2] #!/bin/bash ip address add 192.0.2.1/32 dev lo ip address add 192.0.2.2/32 dev lo ip nexthop add id 1 via 192.0.2.3 fdb ip nexthop add id 10 group 1 fdb ip link add name vx0 up type vxlan id 10010 local 192.0.2.1 dstport 12345 localbypass ip link add name vx1 up type vxlan id 10020 local 192.0.2.2 dstport 54321 learning bridge fdb add 00:11:22:33:44:55 dev vx0 self static dst 192.0.2.2 port 54321 vni 10020 bridge fdb add 00:aa:bb:cc:dd:ee dev vx1 self static nhid 10 mausezahn vx0 -a 00:aa:bb:cc:dd:ee -b 00:11:22:33:44:55 -c 1 -q Fixes: 1274e1cc4226 ("vxlan: ecmp support for mac fdb entries") Reported-by: Marlin Cremers <mcremers(a)cloudbear.nl> Reviewed-by: Petr Machata <petrm(a)nvidia.com> Signed-off-by: Ido Schimmel <idosch(a)nvidia.com> Reviewed-by: Nikolay Aleksandrov <razor(a)blackwall.org> Link: https://patch.msgid.link/20250901065035.159644-2-idosch@nvidia.com Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> Conflicts: drivers/net/vxlan/vxlan_core.c drivers/net/vxlan/vxlan_private.h [The conflicts were due to some minor issue.] Signed-off-by: Xiaomeng Zhang <zhangxiaomeng13(a)huawei.com> --- drivers/net/vxlan/vxlan_core.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c index 1a95ee880828..b00d9abe91d6 100644 --- a/drivers/net/vxlan/vxlan_core.c +++ b/drivers/net/vxlan/vxlan_core.c @@ -1502,6 +1502,10 @@ static bool vxlan_snoop(struct net_device *dev, if (likely(f)) { struct vxlan_rdst *rdst = first_remote_rcu(f); + /* Don't override an fdb with nexthop with a learnt entry */ + if (rcu_access_pointer(f->nh)) + return true; + if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip) && rdst->remote_ifindex == ifindex)) return false; @@ -1510,10 +1514,6 @@ static bool vxlan_snoop(struct net_device *dev, if (f->state & (NUD_PERMANENT | NUD_NOARP)) return true; - /* Don't override an fdb with nexthop with a learnt entry */ - if (rcu_access_pointer(f->nh)) - return true; - if (net_ratelimit()) netdev_info(dev, "%pM migrated from %pIS to %pIS\n", -- 2.34.1

2 1

[PATCH openEuler-1.0-LTS] drm/radeon: Add the missed acpi_put_table() to fix memory leak
by Pan Taixi 26 Sep '25

26 Sep '25

From: Hanjun Guo <guohanjun(a)huawei.com> stable inclusion from stable-v4.19.270 commit 4760fa67aff6bd8ef0b14c1fa04c295e734c7309 category: bugfix buzilla: https://gitee.com/src-openeuler/kernel/issues/ICY4F8 CVE: CVE-2022-50275 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 10276a20be1115e1f76c189330da2992df980eee ] When the radeon driver reads the bios information from ACPI table in radeon_acpi_vfct_bios(), it misses to call acpi_put_table() to release the ACPI memory after the init, so add acpi_put_table() properly to fix the memory leak. v2: fix text formatting (Alex) Fixes: 268ba0a99f89 ("drm/radeon: implement ACPI VFCT vbios fetch (v3)") Signed-off-by: Hanjun Guo <guohanjun(a)huawei.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Pan Taixi <pantaixi1(a)huawei.com> --- drivers/gpu/drm/radeon/radeon_bios.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/radeon/radeon_bios.c b/drivers/gpu/drm/radeon/radeon_bios.c index 04c0ed41374f..80562aeb8149 100644 --- a/drivers/gpu/drm/radeon/radeon_bios.c +++ b/drivers/gpu/drm/radeon/radeon_bios.c @@ -600,13 +600,14 @@ static bool radeon_acpi_vfct_bios(struct radeon_device *rdev) acpi_size tbl_size; UEFI_ACPI_VFCT *vfct; unsigned offset; + bool r = false; if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr))) return false; tbl_size = hdr->length; if (tbl_size < sizeof(UEFI_ACPI_VFCT)) { DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n"); - return false; + goto out; } vfct = (UEFI_ACPI_VFCT *)hdr; @@ -619,13 +620,13 @@ static bool radeon_acpi_vfct_bios(struct radeon_device *rdev) offset += sizeof(VFCT_IMAGE_HEADER); if (offset > tbl_size) { DRM_ERROR("ACPI VFCT image header truncated\n"); - return false; + goto out; } offset += vhdr->ImageLength; if (offset > tbl_size) { DRM_ERROR("ACPI VFCT image truncated\n"); - return false; + goto out; } if (vhdr->ImageLength && @@ -637,15 +638,18 @@ static bool radeon_acpi_vfct_bios(struct radeon_device *rdev) rdev->bios = kmemdup(&vbios->VbiosContent, vhdr->ImageLength, GFP_KERNEL); + if (rdev->bios) + r = true; - if (!rdev->bios) - return false; - return true; + goto out; } } DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n"); - return false; + +out: + acpi_put_table(hdr); + return r; } #else static inline bool radeon_acpi_vfct_bios(struct radeon_device *rdev) -- 2.34.1

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[PATCH openEuler-1.0-LTS] media: uvcvideo: Handle cameras with invalid descriptors
by Pan Taixi 26 Sep '25

26 Sep '25

From: Ricardo Ribalda <ribalda(a)chromium.org> stable inclusion from stable-v4.19.276 commit 2914259fcea23971c6fed8b2618d3a729a78c365 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/ICYQPQ CVE: CVE-2023-53437 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 41ddb251c68ac75c101d3a50a68c4629c9055e4c ] If the source entity does not contain any pads, do not create a link. Reported-by: syzbot <syzkaller(a)googlegroups.com> Signed-off-by: Ricardo Ribalda <ribalda(a)chromium.org> Reviewed-by: Laurent Pinchart <laurent.pinchart(a)ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart(a)ideasonboard.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Pan Taixi <pantaixi1(a)huawei.com> --- drivers/media/usb/uvc/uvc_entity.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/usb/uvc/uvc_entity.c b/drivers/media/usb/uvc/uvc_entity.c index 554063c07d7a..7233b00eb756 100644 --- a/drivers/media/usb/uvc/uvc_entity.c +++ b/drivers/media/usb/uvc/uvc_entity.c @@ -42,7 +42,7 @@ static int uvc_mc_create_links(struct uvc_video_chain *chain, continue; remote = uvc_entity_by_id(chain->dev, entity->baSourceID[i]); - if (remote == NULL) + if (remote == NULL || remote->num_pads == 0) return -EINVAL; source = (UVC_ENTITY_TYPE(remote) == UVC_TT_STREAMING) -- 2.34.1

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[PATCH OLK-5.10] vxlan: Fix NPD when refreshing an FDB entry with a nexthop object
by Xiaomeng Zhang 26 Sep '25

26 Sep '25

From: Ido Schimmel <idosch(a)nvidia.com> mainline inclusion from mainline-v6.17-rc5 commit 6ead38147ebb813f08be6ea8ef547a0e4c09559a category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/ICYXVU CVE: CVE-2025-39851 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- VXLAN FDB entries can point to either a remote destination or an FDB nexthop group. The latter is usually used in EVPN deployments where learning is disabled. However, when learning is enabled, an incoming packet might try to refresh an FDB entry that points to an FDB nexthop group and therefore does not have a remote. Such packets should be dropped, but they are only dropped after dereferencing the non-existent remote, resulting in a NPD [1] which can be reproduced using [2]. Fix by dropping such packets earlier. Remove the misleading comment from first_remote_rcu(). [1] BUG: kernel NULL pointer dereference, address: 0000000000000000 [...] CPU: 13 UID: 0 PID: 361 Comm: mausezahn Not tainted 6.17.0-rc1-virtme-g9f6b606b6b37 #1 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-4.fc41 04/01/2014 RIP: 0010:vxlan_snoop+0x98/0x1e0 [...] Call Trace: <TASK> vxlan_encap_bypass+0x209/0x240 encap_bypass_if_local+0xb1/0x100 vxlan_xmit_one+0x1375/0x17e0 vxlan_xmit+0x6b4/0x15f0 dev_hard_start_xmit+0x5d/0x1c0 __dev_queue_xmit+0x246/0xfd0 packet_sendmsg+0x113a/0x1850 __sock_sendmsg+0x38/0x70 __sys_sendto+0x126/0x180 __x64_sys_sendto+0x24/0x30 do_syscall_64+0xa4/0x260 entry_SYSCALL_64_after_hwframe+0x4b/0x53 [2] #!/bin/bash ip address add 192.0.2.1/32 dev lo ip address add 192.0.2.2/32 dev lo ip nexthop add id 1 via 192.0.2.3 fdb ip nexthop add id 10 group 1 fdb ip link add name vx0 up type vxlan id 10010 local 192.0.2.1 dstport 12345 localbypass ip link add name vx1 up type vxlan id 10020 local 192.0.2.2 dstport 54321 learning bridge fdb add 00:11:22:33:44:55 dev vx0 self static dst 192.0.2.2 port 54321 vni 10020 bridge fdb add 00:aa:bb:cc:dd:ee dev vx1 self static nhid 10 mausezahn vx0 -a 00:aa:bb:cc:dd:ee -b 00:11:22:33:44:55 -c 1 -q Fixes: 1274e1cc4226 ("vxlan: ecmp support for mac fdb entries") Reported-by: Marlin Cremers <mcremers(a)cloudbear.nl> Reviewed-by: Petr Machata <petrm(a)nvidia.com> Signed-off-by: Ido Schimmel <idosch(a)nvidia.com> Reviewed-by: Nikolay Aleksandrov <razor(a)blackwall.org> Link: https://patch.msgid.link/20250901065035.159644-2-idosch@nvidia.com Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> Conflicts: drivers/net/vxlan/vxlan_core.c [The conflicts were due to some minor issue.] Signed-off-by: Xiaomeng Zhang <zhangxiaomeng13(a)huawei.com> --- drivers/net/vxlan/vxlan_core.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c index 1a95ee880828..b00d9abe91d6 100644 --- a/drivers/net/vxlan/vxlan_core.c +++ b/drivers/net/vxlan/vxlan_core.c @@ -1502,6 +1502,10 @@ static bool vxlan_snoop(struct net_device *dev, if (likely(f)) { struct vxlan_rdst *rdst = first_remote_rcu(f); + /* Don't override an fdb with nexthop with a learnt entry */ + if (rcu_access_pointer(f->nh)) + return true; + if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip) && rdst->remote_ifindex == ifindex)) return false; @@ -1510,10 +1514,6 @@ static bool vxlan_snoop(struct net_device *dev, if (f->state & (NUD_PERMANENT | NUD_NOARP)) return true; - /* Don't override an fdb with nexthop with a learnt entry */ - if (rcu_access_pointer(f->nh)) - return true; - if (net_ratelimit()) netdev_info(dev, "%pM migrated from %pIS to %pIS\n", -- 2.34.1

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[PATCH openEuler-1.0-LTS] crypto: cavium - prevent integer overflow loading firmware
by Zhang Kunbo 26 Sep '25

26 Sep '25

From: Dan Carpenter <dan.carpenter(a)oracle.com> stable inclusion from stable-v4.19.262 commit 90e483e7f20c32287d2a9da967e122938f52737a category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/ICY4CA CVE: CVE-2022-50330 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 2526d6bf27d15054bb0778b2f7bc6625fd934905 ] The "code_length" value comes from the firmware file. If your firmware is untrusted realistically there is probably very little you can do to protect yourself. Still we try to limit the damage as much as possible. Also Smatch marks any data read from the filesystem as untrusted and prints warnings if it not capped correctly. The "ntohl(ucode->code_length) * 2" multiplication can have an integer overflow. Fixes: 9e2c7d99941d ("crypto: cavium - Add Support for Octeon-tx CPT Engine") Signed-off-by: Dan Carpenter <dan.carpenter(a)oracle.com> Signed-off-by: Herbert Xu <herbert(a)gondor.apana.org.au> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Zhang Kunbo <zhangkunbo(a)huawei.com> --- drivers/crypto/cavium/cpt/cptpf_main.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/crypto/cavium/cpt/cptpf_main.c b/drivers/crypto/cavium/cpt/cptpf_main.c index 06ad85ab5e86..7416f30ee976 100644 --- a/drivers/crypto/cavium/cpt/cptpf_main.c +++ b/drivers/crypto/cavium/cpt/cptpf_main.c @@ -257,6 +257,7 @@ static int cpt_ucode_load_fw(struct cpt_device *cpt, const u8 *fw, bool is_ae) const struct firmware *fw_entry; struct device *dev = &cpt->pdev->dev; struct ucode_header *ucode; + unsigned int code_length; struct microcode *mcode; int j, ret = 0; @@ -267,11 +268,12 @@ static int cpt_ucode_load_fw(struct cpt_device *cpt, const u8 *fw, bool is_ae) ucode = (struct ucode_header *)fw_entry->data; mcode = &cpt->mcode[cpt->next_mc_idx]; memcpy(mcode->version, (u8 *)fw_entry->data, CPT_UCODE_VERSION_SZ); - mcode->code_size = ntohl(ucode->code_length) * 2; - if (!mcode->code_size) { + code_length = ntohl(ucode->code_length); + if (code_length == 0 || code_length >= INT_MAX / 2) { ret = -EINVAL; goto fw_release; } + mcode->code_size = code_length * 2; mcode->is_ae = is_ae; mcode->core_mask = 0ULL; -- 2.34.1

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[PATCH OLK-6.6] vxlan: Fix NPD when refreshing an FDB entry with a nexthop object
by Xiaomeng Zhang 26 Sep '25

26 Sep '25

From: Ido Schimmel <idosch(a)nvidia.com> mainline inclusion from mainline-v6.17-rc5 commit 6ead38147ebb813f08be6ea8ef547a0e4c09559a category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/ICYXVU CVE: CVE-2025-39851 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- VXLAN FDB entries can point to either a remote destination or an FDB nexthop group. The latter is usually used in EVPN deployments where learning is disabled. However, when learning is enabled, an incoming packet might try to refresh an FDB entry that points to an FDB nexthop group and therefore does not have a remote. Such packets should be dropped, but they are only dropped after dereferencing the non-existent remote, resulting in a NPD [1] which can be reproduced using [2]. Fix by dropping such packets earlier. Remove the misleading comment from first_remote_rcu(). [1] BUG: kernel NULL pointer dereference, address: 0000000000000000 [...] CPU: 13 UID: 0 PID: 361 Comm: mausezahn Not tainted 6.17.0-rc1-virtme-g9f6b606b6b37 #1 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-4.fc41 04/01/2014 RIP: 0010:vxlan_snoop+0x98/0x1e0 [...] Call Trace: <TASK> vxlan_encap_bypass+0x209/0x240 encap_bypass_if_local+0xb1/0x100 vxlan_xmit_one+0x1375/0x17e0 vxlan_xmit+0x6b4/0x15f0 dev_hard_start_xmit+0x5d/0x1c0 __dev_queue_xmit+0x246/0xfd0 packet_sendmsg+0x113a/0x1850 __sock_sendmsg+0x38/0x70 __sys_sendto+0x126/0x180 __x64_sys_sendto+0x24/0x30 do_syscall_64+0xa4/0x260 entry_SYSCALL_64_after_hwframe+0x4b/0x53 [2] #!/bin/bash ip address add 192.0.2.1/32 dev lo ip address add 192.0.2.2/32 dev lo ip nexthop add id 1 via 192.0.2.3 fdb ip nexthop add id 10 group 1 fdb ip link add name vx0 up type vxlan id 10010 local 192.0.2.1 dstport 12345 localbypass ip link add name vx1 up type vxlan id 10020 local 192.0.2.2 dstport 54321 learning bridge fdb add 00:11:22:33:44:55 dev vx0 self static dst 192.0.2.2 port 54321 vni 10020 bridge fdb add 00:aa:bb:cc:dd:ee dev vx1 self static nhid 10 mausezahn vx0 -a 00:aa:bb:cc:dd:ee -b 00:11:22:33:44:55 -c 1 -q Fixes: 1274e1cc4226 ("vxlan: ecmp support for mac fdb entries") Reported-by: Marlin Cremers <mcremers(a)cloudbear.nl> Reviewed-by: Petr Machata <petrm(a)nvidia.com> Signed-off-by: Ido Schimmel <idosch(a)nvidia.com> Reviewed-by: Nikolay Aleksandrov <razor(a)blackwall.org> Link: https://patch.msgid.link/20250901065035.159644-2-idosch@nvidia.com Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> Conflicts: drivers/net/vxlan/vxlan_core.c [The conflicts were due to some minor issue.] Signed-off-by: Xiaomeng Zhang <zhangxiaomeng13(a)huawei.com> --- drivers/net/vxlan/vxlan_core.c | 8 ++++---- drivers/net/vxlan/vxlan_private.h | 4 +--- 2 files changed, 5 insertions(+), 7 deletions(-) diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c index 64db3e98a1b6..05a10738a788 100644 --- a/drivers/net/vxlan/vxlan_core.c +++ b/drivers/net/vxlan/vxlan_core.c @@ -1460,14 +1460,14 @@ static bool vxlan_snoop(struct net_device *dev, if (likely(f)) { struct vxlan_rdst *rdst = first_remote_rcu(f); + /* Don't override an fdb with nexthop with a learnt entry */ + if (rcu_access_pointer(f->nh)) + return true; + if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip) && rdst->remote_ifindex == ifindex)) return false; - /* Don't migrate static entries, drop packets */ - if (f->state & (NUD_PERMANENT | NUD_NOARP)) - return true; - /* Don't override an fdb with nexthop with a learnt entry */ if (rcu_access_pointer(f->nh)) return true; diff --git a/drivers/net/vxlan/vxlan_private.h b/drivers/net/vxlan/vxlan_private.h index 85b6d0c347e3..8444b5d1ca60 100644 --- a/drivers/net/vxlan/vxlan_private.h +++ b/drivers/net/vxlan/vxlan_private.h @@ -56,9 +56,7 @@ static inline struct hlist_head *vs_head(struct net *net, __be16 port) return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)]; } -/* First remote destination for a forwarding entry. - * Guaranteed to be non-NULL because remotes are never deleted. - */ +/* First remote destination for a forwarding entry. */ static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb) { if (rcu_access_pointer(fdb->nh)) -- 2.34.1

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