In the Linux kernel, the following vulnerability has been resolved:
vdpa/mlx5: Fix release of uninitialized resources on error path
The commit in the fixes tag made sure that mlx5_vdpa_free() is the single entrypoint for removing the vdpa device resources added in mlx5_vdpa_dev_add(), even in the cleanup path of mlx5_vdpa_dev_add().
This means that all functions from mlx5_vdpa_free() should be able to handle uninitialized resources. This was not the case though: mlx5_vdpa_destroy_mr_resources() and mlx5_cmd_cleanup_async_ctx() were not able to do so. This caused the splat below when adding a vdpa device without a MAC address.
This patch fixes these remaining issues:
- Makes mlx5_vdpa_destroy_mr_resources() return early if called on uninitialized resources.
- Moves mlx5_cmd_init_async_ctx() early on during device addition because it can't fail. This means that mlx5_cmd_cleanup_async_ctx() also can't fail. To mirror this, move the call site of mlx5_cmd_cleanup_async_ctx() in mlx5_vdpa_free().
An additional comment was added in mlx5_vdpa_free() to document the expectations of functions called from this context.
Splat:
mlx5_core 0000:b5:03.2: mlx5_vdpa_dev_add:3950:(pid 2306) warning: No mac address provisioned? ------------[ cut here ]------------ WARNING: CPU: 13 PID: 2306 at kernel/workqueue.c:4207 __flush_work+0x9a/0xb0 [...] Call Trace: <TASK> ? __try_to_del_timer_sync+0x61/0x90 ? __timer_delete_sync+0x2b/0x40 mlx5_vdpa_destroy_mr_resources+0x1c/0x40 [mlx5_vdpa] mlx5_vdpa_free+0x45/0x160 [mlx5_vdpa] vdpa_release_dev+0x1e/0x50 [vdpa] device_release+0x31/0x90 kobject_cleanup+0x37/0x130 mlx5_vdpa_dev_add+0x327/0x890 [mlx5_vdpa] vdpa_nl_cmd_dev_add_set_doit+0x2c1/0x4d0 [vdpa] genl_family_rcv_msg_doit+0xd8/0x130 genl_family_rcv_msg+0x14b/0x220 ? __pfx_vdpa_nl_cmd_dev_add_set_doit+0x10/0x10 [vdpa] genl_rcv_msg+0x47/0xa0 ? __pfx_genl_rcv_msg+0x10/0x10 netlink_rcv_skb+0x53/0x100 genl_rcv+0x24/0x40 netlink_unicast+0x27b/0x3b0 netlink_sendmsg+0x1f7/0x430 __sys_sendto+0x1fa/0x210 ? ___pte_offset_map+0x17/0x160 ? next_uptodate_folio+0x85/0x2b0 ? percpu_counter_add_batch+0x51/0x90 ? filemap_map_pages+0x515/0x660 __x64_sys_sendto+0x20/0x30 do_syscall_64+0x7b/0x2c0 ? do_read_fault+0x108/0x220 ? do_pte_missing+0x14a/0x3e0 ? __handle_mm_fault+0x321/0x730 ? count_memcg_events+0x13f/0x180 ? handle_mm_fault+0x1fb/0x2d0 ? do_user_addr_fault+0x20c/0x700 ? syscall_exit_work+0x104/0x140 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f0c25b0feca [...] ---[ end trace 0000000000000000 ]---
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Oracle_linux | — | Upgrade kernel-uek | Oct 16, 2025 | Aug 22, 2025 |
| Suse | — | Upgrade kernel-kvmsmall-vdsoUpgrade dtb-nvidiaUpgrade dtb-hisiliconUpgrade dlm-kmp-defaultUpgrade cluster-md-kmp-64kbUpgrade ocfs2-kmp-64kbUpgrade kernel-rt-optionalUpgrade kernel-default-livepatchUpgrade kernel-defaultUpgrade kernel-64kb-optionalUpgrade dtb-sprdUpgrade kernel-64kb-develUpgrade kernel-64kb-extraUpgrade kselftests-kmp-defaultUpgrade kernel-azureUpgrade kernel-docs-htmlUpgrade dtb-marvellUpgrade kselftests-kmp-rtUpgrade kernel-rt-livepatch-develUpgrade kernel-default-baseUpgrade dtb-renesasUpgrade kernel-default-livepatch-develUpgrade gfs2-kmp-defaultUpgrade dtb-broadcomUpgrade reiserfs-kmp-defaultUpgrade dtb-socionextUpgrade dtb-appleUpgrade dtb-amdUpgrade kernel-docsUpgrade kernel-symsUpgrade dlm-kmp-rtUpgrade cluster-md-kmp-defaultUpgrade ocfs2-kmp-defaultUpgrade dtb-amlogicUpgrade dtb-apmUpgrade kernel-obs-qaUpgrade kselftests-kmp-64kbUpgrade kernel-kvmsmall-develUpgrade kernel-zfcpdumpUpgrade dtb-caviumUpgrade ocfs2-kmp-rtUpgrade kernel-default-optionalUpgrade kernel-rt-extraUpgrade kernel-source-azureUpgrade cluster-md-kmp-rtUpgrade kernel-macrosUpgrade kernel-rt-develUpgrade dtb-mediatekUpgrade dtb-exynosUpgrade kernel-kvmsmallUpgrade dtb-alteraUpgrade kernel-default-develUpgrade gfs2-kmp-rtUpgrade kernel-azure-develUpgrade gfs2-kmp-64kbUpgrade dlm-kmp-64kbUpgrade kernel-64kbUpgrade dtb-xilinxUpgrade dtb-rockchipUpgrade kernel-obs-buildUpgrade dtb-allwinnerUpgrade kernel-rt-livepatchUpgrade kernel-syms-azureUpgrade dtb-armUpgrade kernel-rtUpgrade dtb-lgUpgrade dtb-freescaleUpgrade kernel-source-vanillaUpgrade dtb-amazonUpgrade kernel-develUpgrade dtb-qcomUpgrade kernel-devel-azureUpgrade kernel-rt-vdsoUpgrade kernel-sourceUpgrade kernel-default-vdsoUpgrade kernel-default-extra | Dec 5, 2025 | Oct 15, 2025 |
| Ubuntu | — | Upgrade linux-image-gcp-64k-6.14Upgrade linux-image-realtime-6.14Upgrade linux-image-realtimeUpgrade linux-image-generic-64kUpgrade linux-image-6.14.0-36-genericUpgrade linux-image-oracleUpgrade linux-image-gcp-6.14Upgrade linux-image-oracle-64kUpgrade linux-image-gcpUpgrade linux-image-azureUpgrade linux-image-6.14.0-1017-oracleUpgrade linux-image-6.14.0-36-generic-64kUpgrade linux-image-6.14.0-1020-gcp-64kUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-6.14.0-1017-oracle-64kUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-oem-24.04aUpgrade linux-image-virtual-6.14Upgrade linux-image-raspiUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-aws-6.14Upgrade linux-image-generic-64k-6.14Upgrade linux-image-awsUpgrade linux-image-6.14.0-1016-oemUpgrade linux-image-oracle-64k-6.14Upgrade linux-image-virtualUpgrade linux-image-aws-64k-6.14Upgrade linux-image-oem-24.04Upgrade linux-image-oracle-6.14Upgrade linux-image-realtime-hwe-24.04Upgrade linux-image-6.14.0-1017-awsUpgrade linux-image-azure-6.14Upgrade linux-image-raspi-6.14Upgrade linux-image-aws-64kUpgrade linux-image-6.14.0-1020-gcpUpgrade linux-image-6.14.0-1017-aws-64kUpgrade linux-image-oem-6.14Upgrade linux-image-6.14.0-1017-azureUpgrade linux-image-gcp-64kUpgrade linux-image-generic | Nov 25, 2025 | Nov 21, 2025 |
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