In the Linux kernel, the following vulnerability has been resolved:
RDMA/mlx5: Fix unsafe xarray access in implicit ODP handling
__xa_store() and __xa_erase() were used without holding the proper lock, which led to a lockdep warning due to unsafe RCU usage. This patch replaces them with xa_store() and xa_erase(), which perform the necessary locking internally.
============================= WARNING: suspicious RCPU usage 6.14.0-rc7_for_upstream_debug_2025_03_18_15_01 #1 Not tainted ----------------------------- ./include/linux/xarray.h:1211 suspicious rcu_dereference_protected() usage!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 1 3 locks held by kworker/u136:0/219: at: process_one_work+0xbe4/0x15f0 process_one_work+0x75c/0x15f0 pagefault_mr+0x9a5/0x1390 [mlx5_ib]
stack backtrace: CPU: 14 UID: 0 PID: 219 Comm: kworker/u136:0 Not tainted 6.14.0-rc7_for_upstream_debug_2025_03_18_15_01 #1 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014 Workqueue: mlx5_ib_page_fault mlx5_ib_eqe_pf_action [mlx5_ib] Call Trace: dump_stack_lvl+0xa8/0xc0 lockdep_rcu_suspicious+0x1e6/0x260 xas_create+0xb8a/0xee0 xas_store+0x73/0x14c0 __xa_store+0x13c/0x220 ? xa_store_range+0x390/0x390 ? spin_bug+0x1d0/0x1d0 pagefault_mr+0xcb5/0x1390 [mlx5_ib] ? _raw_spin_unlock+0x1f/0x30 mlx5_ib_eqe_pf_action+0x3be/0x2620 [mlx5_ib] ? lockdep_hardirqs_on_prepare+0x400/0x400 ? mlx5_ib_invalidate_range+0xcb0/0xcb0 [mlx5_ib] process_one_work+0x7db/0x15f0 ? pwq_dec_nr_in_flight+0xda0/0xda0 ? assign_work+0x168/0x240 worker_thread+0x57d/0xcd0 ? rescuer_thread+0xc40/0xc40 kthread+0x3b3/0x800 ? kthread_is_per_cpu+0xb0/0xb0 ? lock_downgrade+0x680/0x680 ? do_raw_spin_lock+0x12d/0x270 ? spin_bug+0x1d0/0x1d0 ? finish_task_switch.isra.0+0x284/0x9e0 ? lockdep_hardirqs_on_prepare+0x284/0x400 ? kthread_is_per_cpu+0xb0/0xb0 ret_from_fork+0x2d/0x70 ? kthread_is_per_cpu+0xb0/0xb0 ret_from_fork_asm+0x11/0x20
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel-livepatch-6.12.37-61.105Upgrade kernel6.12-toolsUpgrade kernel6.12-debuginfoUpgrade bpftool6.12Upgrade kernel6.12Upgrade python3-perf6.12Upgrade bpftool6.12-debuginfoUpgrade kernel6.12-tools-develUpgrade kernel6.12-debuginfo-common-aarch64Upgrade perf6.12Upgrade kernel6.12-modules-extra-commonUpgrade kernel6.12-libbpf-develUpgrade kernel6.12-modules-extraUpgrade kernel6.12-tools-debuginfoUpgrade perf6.12-debuginfoUpgrade kernel6.12-headersUpgrade kernel6.12-develUpgrade kernel6.12-libbpf-staticUpgrade kernel6.12-libbpf-debuginfoUpgrade kernel6.12-libbpfUpgrade python3-perf6.12-debuginfo | Sep 16, 2025 | Jul 25, 2025 |
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Redhat_linux | — | No solution exists | Jul 31, 2025 | Jul 25, 2025 |
| Suse | — | Upgrade kernel-default-develUpgrade kselftests-kmp-defaultUpgrade kernel-default-extraUpgrade kernel-docsUpgrade dtb-qcomUpgrade cluster-md-kmp-defaultUpgrade kernel-sourceUpgrade gfs2-kmp-64kbUpgrade kernel-macrosUpgrade kernel-symsUpgrade dtb-armUpgrade kernel-zfcpdumpUpgrade kernel-kvmsmall-develUpgrade gfs2-kmp-rtUpgrade dtb-marvellUpgrade kselftests-kmp-64kbUpgrade dtb-amlogicUpgrade dtb-apmUpgrade dtb-lgUpgrade dtb-socionextUpgrade dtb-freescaleUpgrade kernel-obs-qaUpgrade kernel-develUpgrade dtb-xilinxUpgrade kernel-obs-buildUpgrade ocfs2-kmp-defaultUpgrade kselftests-kmp-rtUpgrade kernel-rt-livepatchUpgrade kernel-rt-vdsoUpgrade kernel-default-optionalUpgrade dtb-alteraUpgrade dlm-kmp-rtUpgrade dtb-broadcomUpgrade kernel-defaultUpgrade ocfs2-kmp-64kbUpgrade dtb-amdUpgrade dtb-mediatekUpgrade kernel-64kbUpgrade dtb-exynosUpgrade dtb-amazonUpgrade kernel-rt-livepatch-develUpgrade kernel-rtUpgrade kernel-64kb-optionalUpgrade kernel-64kb-develUpgrade kernel-kvmsmall-vdsoUpgrade ocfs2-kmp-rtUpgrade kernel-kvmsmall | Dec 5, 2025 | Nov 6, 2025 |
| Ubuntu | — | Upgrade linux-image-raspiUpgrade linux-image-oracle-6.14Upgrade linux-image-oem-6.14Upgrade linux-image-generic-64k-6.14Upgrade linux-image-realtimeUpgrade linux-image-azure-nvidiaUpgrade linux-image-6.14.0-1016-raspiUpgrade linux-image-6.14.0-34-genericUpgrade linux-image-oracle-64k-6.14Upgrade linux-image-oracleUpgrade linux-image-oem-24.04cUpgrade linux-image-aws-64k-6.14Upgrade linux-image-6.14.0-1015-awsUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-6.14.0-34-generic-64kUpgrade linux-image-awsUpgrade linux-image-gcp-64kUpgrade linux-image-azure-nvidia-6.14Upgrade linux-image-6.14.0-1015-oracle-64kUpgrade linux-image-oem-24.04bUpgrade linux-image-gcp-64k-6.14Upgrade linux-image-6.14.0-1018-gcp-64kUpgrade linux-image-azure-6.14Upgrade linux-image-6.14.0-1014-oemUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-gcpUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-oem-24.04Upgrade linux-image-realtime-hwe-24.04Upgrade linux-image-oracle-64kUpgrade linux-image-6.14.0-1015-aws-64kUpgrade linux-image-aws-6.14Upgrade linux-image-6.14.0-1015-oracleUpgrade linux-image-genericUpgrade linux-image-realtime-6.14Upgrade linux-image-6.14.0-1014-azureUpgrade linux-image-aws-64kUpgrade linux-image-6.14.0-1014-realtimeUpgrade linux-image-raspi-6.14Upgrade linux-image-virtualUpgrade linux-image-oem-24.04aUpgrade linux-image-generic-6.14Upgrade linux-image-6.14.0-1018-gcpUpgrade linux-image-virtual-6.14Upgrade linux-image-gcp-6.14Upgrade linux-image-azureUpgrade linux-image-6.14.0-1007-azure-nvidiaUpgrade linux-image-generic-64k | Jul 31, 2025 | Jul 25, 2025 |
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