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[PATCH OLK-6.6] bonding: fix use-after-free due to enslave fail after slave array update
by Dong Chenchen 05 Mar '26

05 Mar '26

From: Nikolay Aleksandrov <razor(a)blackwall.org> mainline inclusion from mainline-v6.19-rc8 commit e9acda52fd2ee0cdca332f996da7a95c5fd25294 category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/13721 CVE: CVE-2026-23171 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- Fix a use-after-free which happens due to enslave failure after the new slave has been added to the array. Since the new slave can be used for Tx immediately, we can use it after it has been freed by the enslave error cleanup path which frees the allocated slave memory. Slave update array is supposed to be called last when further enslave failures are not expected. Move it after xdp setup to avoid any problems. It is very easy to reproduce the problem with a simple xdp_pass prog: ip l add bond1 type bond mode balance-xor ip l set bond1 up ip l set dev bond1 xdp object xdp_pass.o sec xdp_pass ip l add dumdum type dummy Then run in parallel: while :; do ip l set dumdum master bond1 1>/dev/null 2>&1; done; mausezahn bond1 -a own -b rand -A rand -B 1.1.1.1 -c 0 -t tcp "dp=1-1023, flags=syn" The crash happens almost immediately: [ 605.602850] Oops: general protection fault, probably for non-canonical address 0xe0e6fc2460000137: 0000 [#1] SMP KASAN NOPTI [ 605.602916] KASAN: maybe wild-memory-access in range [0x07380123000009b8-0x07380123000009bf] [ 605.602946] CPU: 0 UID: 0 PID: 2445 Comm: mausezahn Kdump: loaded Tainted: G B 6.19.0-rc6+ #21 PREEMPT(voluntary) [ 605.602979] Tainted: [B]=BAD_PAGE [ 605.602998] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 605.603032] RIP: 0010:netdev_core_pick_tx+0xcd/0x210 [ 605.603063] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 3e 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 6b 08 49 8d 7d 30 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 25 01 00 00 49 8b 45 30 4c 89 e2 48 89 ee 48 89 [ 605.603111] RSP: 0018:ffff88817b9af348 EFLAGS: 00010213 [ 605.603145] RAX: dffffc0000000000 RBX: ffff88817d28b420 RCX: 0000000000000000 [ 605.603172] RDX: 00e7002460000137 RSI: 0000000000000008 RDI: 07380123000009be [ 605.603199] RBP: ffff88817b541a00 R08: 0000000000000001 R09: fffffbfff3ed8c0c [ 605.603226] R10: ffffffff9f6c6067 R11: 0000000000000001 R12: 0000000000000000 [ 605.603253] R13: 073801230000098e R14: ffff88817d28b448 R15: ffff88817b541a84 [ 605.603286] FS: 00007f6570ef67c0(0000) GS:ffff888221dfa000(0000) knlGS:0000000000000000 [ 605.603319] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 605.603343] CR2: 00007f65712fae40 CR3: 000000011371b000 CR4: 0000000000350ef0 [ 605.603373] Call Trace: [ 605.603392] <TASK> [ 605.603410] __dev_queue_xmit+0x448/0x32a0 [ 605.603434] ? __pfx_vprintk_emit+0x10/0x10 [ 605.603461] ? __pfx_vprintk_emit+0x10/0x10 [ 605.603484] ? __pfx___dev_queue_xmit+0x10/0x10 [ 605.603507] ? bond_start_xmit+0xbfb/0xc20 [bonding] [ 605.603546] ? _printk+0xcb/0x100 [ 605.603566] ? __pfx__printk+0x10/0x10 [ 605.603589] ? bond_start_xmit+0xbfb/0xc20 [bonding] [ 605.603627] ? add_taint+0x5e/0x70 [ 605.603648] ? add_taint+0x2a/0x70 [ 605.603670] ? end_report.cold+0x51/0x75 [ 605.603693] ? bond_start_xmit+0xbfb/0xc20 [bonding] [ 605.603731] bond_start_xmit+0x623/0xc20 [bonding] Fixes: 9e2ee5c7e7c3 ("net, bonding: Add XDP support to the bonding driver") Signed-off-by: Nikolay Aleksandrov <razor(a)blackwall.org> Reported-by: Chen Zhen <chenzhen126(a)huawei.com> Closes: https://lore.kernel.org/netdev/fae17c21-4940-5605-85b2-1d5e17342358@huawei.… CC: Jussi Maki <joamaki(a)gmail.com> CC: Daniel Borkmann <daniel(a)iogearbox.net> Acked-by: Daniel Borkmann <daniel(a)iogearbox.net> Link: https://patch.msgid.link/20260123120659.571187-1-razor@blackwall.org Signed-off-by: Paolo Abeni <pabeni(a)redhat.com> Conflicts: drivers/net/bonding/bond_main.c [commit e0caeb24f538 is not backport] Signed-off-by: Dong Chenchen <dongchenchen2(a)huawei.com> --- drivers/net/bonding/bond_main.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index 6dcb4e963044..172fdca5ce80 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -2296,9 +2296,6 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev, unblock_netpoll_tx(); } - if (bond_mode_can_use_xmit_hash(bond)) - bond_update_slave_arr(bond, NULL); - if (!slave_dev->netdev_ops->ndo_bpf || !slave_dev->netdev_ops->ndo_xdp_xmit) { if (bond->xdp_prog) { @@ -2332,6 +2329,9 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev, bpf_prog_inc(bond->xdp_prog); } + if (bond_mode_can_use_xmit_hash(bond)) + bond_update_slave_arr(bond, NULL); + bond_xdp_set_features(bond_dev); slave_info(bond_dev, slave_dev, "Enslaving as %s interface with %s link\n", -- 2.25.1

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[PATCH OLK-6.6 0/2] net: Fix CVE-2026-23204
by Dong Chenchen 05 Mar '26

05 Mar '26

Fix CVE-2026-23204 Eric Dumazet (2): net: add skb_header_pointer_careful() helper net/sched: cls_u32: use skb_header_pointer_careful() include/linux/skbuff.h | 12 ++++++++++++ net/sched/cls_u32.c | 13 ++++++------- 2 files changed, 18 insertions(+), 7 deletions(-) -- 2.25.1

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[PATCH v3 openEuler-26.09 0/4] Introduce xsched dmem
by Liu Kai 05 Mar '26

05 Mar '26

Introduce xsched dmem Alexander Pavlenko (4): xsched/dmem: set max region size of xsched dmem root group to physical XPU memory size xsched/dmem: init xsched dmem region xsched/dmem: introduce xsched_dmem_alloc() xsched/dmem: introduce xsched_dmem_free() include/linux/xsched.h | 16 ++++ include/uapi/linux/xcu_vstream.h | 8 ++ kernel/cgroup/dmem.c | 5 ++ kernel/xsched/Makefile | 1 + kernel/xsched/core.c | 4 + kernel/xsched/dmem.c | 135 +++++++++++++++++++++++++++++++ kernel/xsched/vstream.c | 42 ++++++++++ 7 files changed, 211 insertions(+) create mode 100644 kernel/xsched/dmem.c -- 2.34.1

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[PATCH OLK-6.6] regmap: Fix race condition in hwspinlock irqsave routine
by Lin Ruifeng 05 Mar '26

05 Mar '26

From: Cheng-Yu Lee <cylee12(a)realtek.com> stable inclusion from stable-v6.6.122 commit 24f31be6ad70537fd7706269d99c92cade465a09 category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/13604 CVE: CVE-2026-23071 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 4b58aac989c1e3fafb1c68a733811859df388250 ] Previously, the address of the shared member '&map->spinlock_flags' was passed directly to 'hwspin_lock_timeout_irqsave'. This creates a race condition where multiple contexts contending for the lock could overwrite the shared flags variable, potentially corrupting the state for the current lock owner. Fix this by using a local stack variable 'flags' to store the IRQ state temporarily. Fixes: 8698b9364710 ("regmap: Add hardware spinlock support") Signed-off-by: Cheng-Yu Lee <cylee12(a)realtek.com> Co-developed-by: Yu-Chun Lin <eleanor.lin(a)realtek.com> Signed-off-by: Yu-Chun Lin <eleanor.lin(a)realtek.com> Link: https://patch.msgid.link/20260109032633.8732-1-eleanor.lin@realtek.com Signed-off-by: Mark Brown <broonie(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Lin Ruifeng <linruifeng4(a)huawei.com> --- drivers/base/regmap/regmap.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 1209e01f8c7f..17c0c4412270 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -408,9 +408,11 @@ static void regmap_lock_hwlock_irq(void *__map) static void regmap_lock_hwlock_irqsave(void *__map) { struct regmap *map = __map; + unsigned long flags = 0; hwspin_lock_timeout_irqsave(map->hwlock, UINT_MAX, - &map->spinlock_flags); + &flags); + map->spinlock_flags = flags; } static void regmap_unlock_hwlock(void *__map) -- 2.43.0

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[PATCH OLK-6.6] ceph: fix oops due to invalid pointer for kfree() in parse_longname()
by Pan Taixi 05 Mar '26

05 Mar '26

From: Daniel Vogelbacher <daniel(a)chaospixel.com> mainline inclusion from mainline-v6.19 commit bc8dedae022ce3058659c3addef3ec4b41d15e00 category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/13836/ CVE: CVE-2026-23201 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- This fixes a kernel oops when reading ceph snapshot directories (.snap), for example by simply running `ls /mnt/my_ceph/.snap`. The variable str is guarded by __free(kfree), but advanced by one for skipping the initial '_' in snapshot names. Thus, kfree() is called with an invalid pointer. This patch removes the need for advancing the pointer so kfree() is called with correct memory pointer. Steps to reproduce: 1. Create snapshots on a cephfs volume (I've 63 snaps in my testcase) 2. Add cephfs mount to fstab $ echo "samba-fileserver@.files=/volumes/datapool/stuff/3461082b-ecc9-4e82-8549-3fd2590d3fb6 /mnt/test/stuff ceph acl,noatime,_netdev 0 0" >> /etc/fstab 3. Reboot the system $ systemctl reboot 4. Check if it's really mounted $ mount | grep stuff 5. List snapshots (expected 63 snapshots on my system) $ ls /mnt/test/stuff/.snap Now ls hangs forever and the kernel log shows the oops. Cc: stable(a)vger.kernel.org Fixes: 101841c38346 ("[ceph] parse_longname(): strrchr() expects NUL-terminated string") Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220807 Suggested-by: Helge Deller <deller(a)gmx.de> Signed-off-by: Daniel Vogelbacher <daniel(a)chaospixel.com> Reviewed-by: Viacheslav Dubeyko <Slava.Dubeyko(a)ibm.com> Signed-off-by: Ilya Dryomov <idryomov(a)gmail.com> Conflicts: fs/ceph/crypto.c [Context conflicts due to unmmerged commit 38d46409c463 ("ceph: print cluster fsid and client global_id in all debug logs")] Signed-off-by: Pan Taixi <pantaixi1(a)huawei.com> --- fs/ceph/crypto.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/fs/ceph/crypto.c b/fs/ceph/crypto.c index fa2aaf1d30f8..b0337c4b1bd7 100644 --- a/fs/ceph/crypto.c +++ b/fs/ceph/crypto.c @@ -215,12 +215,13 @@ static struct inode *parse_longname(const struct inode *parent, struct ceph_vino vino = { .snap = CEPH_NOSNAP }; char *name_end, *inode_number; int ret = -EIO; - /* NUL-terminate */ - char *str __free(kfree) = kmemdup_nul(name, *name_len, GFP_KERNEL); + /* Snapshot name must start with an underscore */ + if (*name_len <= 0 || name[0] != '_') + return ERR_PTR(-EIO); + /* Skip initial '_' and NUL-terminate */ + char *str __free(kfree) = kmemdup_nul(name + 1, *name_len - 1, GFP_KERNEL); if (!str) return ERR_PTR(-ENOMEM); - /* Skip initial '_' */ - str++; name_end = strrchr(str, '_'); if (!name_end) { dout("Failed to parse long snapshot name: %s\n", str); -- 2.34.1

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[PATCH v3 openEuler-26.09 0/3] Introduce xsched dmem
by Liu Kai 04 Mar '26

04 Mar '26

Introduce xsched dmem Liu Kai (3): xsched: replace magic number with SCHED_CLASS_MAX_LENGTH for scheduler class string length xsched: simplify root group check by direct comparison with root_xcg xsched: add is_offline check in work function include/linux/xsched.h | 5 ++--- kernel/xsched/cfs_quota.c | 5 +++-- kernel/xsched/cgroup.c | 20 ++++++-------------- 3 files changed, 11 insertions(+), 19 deletions(-) -- 2.34.1

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[PATCH v3 openEuler-26.09 0/4] Introduce xsched dmem
by Liu Kai 04 Mar '26

04 Mar '26

Introduce xsched dmem Alexander Pavlenko (4): xsched/dmem: set max region size of xsched dmem root group to physical XPU memory size xsched/dmem: init xsched dmem region xsched/dmem: introduce xsched_dmem_alloc() xsched/dmem: introduce xsched_dmem_free() include/linux/xsched.h | 16 ++++ include/uapi/linux/xcu_vstream.h | 8 ++ kernel/cgroup/dmem.c | 5 ++ kernel/xsched/Makefile | 1 + kernel/xsched/core.c | 4 + kernel/xsched/dmem.c | 135 +++++++++++++++++++++++++++++++ kernel/xsched/vstream.c | 42 ++++++++++ 7 files changed, 211 insertions(+) create mode 100644 kernel/xsched/dmem.c -- 2.34.1

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[PATCH v6 openEuler-26.09 00/13] Introduce dmem cgroup
by Liu Kai 04 Mar '26

04 Mar '26

Introduce dmem cgroup Chen Ridong (4): cgroup/dmem: fix NULL pointer dereference when setting max cgroup/dmem: avoid rcu warning when unregister region cgroup/dmem: avoid pool UAF cgroup: increase maximum subsystem count from 16 to 32 Friedrich Vock (1): cgroup/dmem: Don't open-code css_for_each_descendant_pre Geert Uytterhoeven (1): cgroup/rdma: Drop bogus PAGE_COUNTER select Jiapeng Chong (1): kernel/cgroup: Remove the unused variable climit Maarten Lankhorst (2): mm/page_counter: move calculating protection values to page_counter kernel/cgroup: Add "dmem" memory accounting cgroup Maxime Ripard (3): cgroup/dmem: Select PAGE_COUNTER cgroup/dmem: Fix parameters documentation doc/cgroup: Fix title underline length Roman Gushchin (1): mm: page_counters: put page_counter_calculate_protection() under CONFIG_MEMCG Documentation/admin-guide/cgroup-v2.rst | 58 +- Documentation/core-api/cgroup.rst | 9 + Documentation/core-api/index.rst | 1 + Documentation/gpu/drm-compute.rst | 54 ++ include/linux/cgroup-defs.h | 8 +- include/linux/cgroup_dmem.h | 66 ++ include/linux/cgroup_subsys.h | 4 + include/linux/page_counter.h | 10 + include/trace/events/cgroup.h | 2 +- init/Kconfig | 10 + kernel/cgroup/Makefile | 1 + kernel/cgroup/cgroup-internal.h | 8 +- kernel/cgroup/cgroup-v1.c | 12 +- kernel/cgroup/cgroup.c | 46 +- kernel/cgroup/debug.c | 2 +- kernel/cgroup/dmem.c | 885 ++++++++++++++++++++++++ mm/memcontrol.c | 154 +---- mm/page_counter.c | 175 +++++ 18 files changed, 1308 insertions(+), 197 deletions(-) create mode 100644 Documentation/core-api/cgroup.rst create mode 100644 Documentation/gpu/drm-compute.rst create mode 100644 include/linux/cgroup_dmem.h create mode 100644 kernel/cgroup/dmem.c -- 2.34.1

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[PATCH openEuler-1.0-LTS v6 00/10] support apei_page_offline_policy
by Qi Xi 04 Mar '26

04 Mar '26

Patches 1-4 with [Merged] prefix are four patches from the old page isolation solution (enable_soft_offline + panic prevention), already delivered to customers. Original PR: https://atomgit.com/openeuler/kernel/merge_requests/20004 Patches 5-9 are the new solution, enabling automated configuration in the new version: Patches 5-7 remove the redundant enable_soft_offline bit 1 huge page isolation switch from the old solution, and copy mc only supports THP and regular pages. Patch 8 adds sysctl_apei_page_offline_policy to support regular/huge page isolation policies and driver notification chain. Patch 9-10 fix bugs. Changes in v6: Fix panic casued by UCE in kernel context (!current->mm). Changes in v5: Change sysctl_apei_page_offline_policy bit0 to enable/disable driver notification. Backport some patches that have been merged. Since CONFIG_UCE_KERNEL_RECOVERY depends on CONFIG_ARM64, remove the redundant condition in migrate_page(). Changes in v4: Fix typo errors and backport bugfix for mc_copy. Changes in v3: Use bool rather than int as the return type of apei_page_should_offline(). Drop the PF_UCE_KERNEL_RECOVERY flag after soft-offlining the page. Changes in v2: Add a new sysctl_apei_page_offline_policy, instead of changing soft_offline_page. Jiaqi Yan (1): mm/memory-failure: userspace controls soft-offlining pages Kyle Meyer (1): mm/memory-failure: support disabling soft offline for HugeTLB pages Qi Xi (4): Revert "mm/memory-failure: support disabling soft offline for HugeTLB pages" Revert "arm64: mm: Add copy mc support for migrate_page" apei/ghes: Add sysctl interface to control soft-offline page isolation uce: Prevent kernel panic for kernel-context UCE with recovery path Wupeng Ma (3): uce: add copy_mc_highpage{s} arm64: mm: Add copy mc support for migrate_page arm64: mm: Add copy mc support for migrate_page Yongjian Sun (1): ext4: fix e4b bitmap inconsistency reports arch/arm64/mm/fault.c | 10 +++++- drivers/acpi/apei/ghes.c | 77 ++++++++++++++++++++++++++++++++++++++++ fs/ext4/mballoc.c | 21 +++++------ include/linux/highmem.h | 55 ++++++++++++++++++++++++++++ include/linux/mm.h | 7 ++++ kernel/sysctl.c | 21 +++++++++++ mm/memory-failure.c | 20 +++++++++-- mm/migrate.c | 58 ++++++++++++++++++++++++++++-- 8 files changed, 253 insertions(+), 16 deletions(-) -- 2.33.0

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[PATCH OLK-6.6 v4 0/2] support apei_page_offline_policy
by Qi Xi 04 Mar '26

04 Mar '26

Changes in v4: Add function stubs when CONFIG_ACPI_APEI_MEMORY_FAILURE=n. Add log when sysctl_apei_page_offline_policy changed. Fix typos. Changes in v3: Fix compile error when CONFIG_ACPI_APEI_MEMORY_FAILURE=n Changes in v2: Refactor the code by moving apei policy control to the seperate file ghes-policy.c No need to enhance logging in do_sea() in this patch series. Automated configuration with enable_soft_offline as global master switch (default=1): enable_soft_offline = 0: Page isolation completely disabled enable_soft_offline = 1: Page isolation enabled, policy controlled by new interface New interface: sysctl_apei_page_offline_policy provides fine-grained control (default=2, isolating base pages only): bit 0: Notify BMC about soft_offline_page scanning bit 1: Control base page isolation bit 2: Control hugetlb page isolation Qi Xi (2): Revert "mm/memory-failure: support disabling soft offline for HugeTLB pages" apei/ghes: Add sysctl interface to control soft-offline page isolation .../ABI/testing/sysfs-memory-page-offline | 3 - drivers/acpi/apei/Makefile | 1 + drivers/acpi/apei/apei-internal.h | 8 ++ drivers/acpi/apei/ghes-policy.c | 102 ++++++++++++++++++ drivers/acpi/apei/ghes.c | 3 + include/linux/acpi.h | 13 +++ mm/memory-failure.c | 17 +-- 7 files changed, 130 insertions(+), 17 deletions(-) create mode 100644 drivers/acpi/apei/ghes-policy.c -- 2.33.0

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