In the Linux kernel, the following vulnerability has been resolved:
wifi: ath11k: decrease MHI channel buffer length to 8KB
Currently buf_len field of ath11k_mhi_config_qca6390 is assigned with 0, making MHI use a default size, 64KB, to allocate channel buffers. This is likely to fail in some scenarios where system memory is highly fragmented and memory compaction or reclaim is not allowed.
There is a fail report which is caused by it: kworker/u32:45: page allocation failure: order:4, mode:0x40c00(GFP_NOIO|__GFP_COMP), nodemask=(null),cpuset=/,mems_allowed=0 CPU: 0 PID: 19318 Comm: kworker/u32:45 Not tainted 6.8.0-rc3-1.gae4495f-default #1 openSUSE Tumbleweed (unreleased) 493b6d5b382c603654d7a81fc3c144d59a1dfceb Workqueue: events_unbound async_run_entry_fn Call Trace: <TASK> dump_stack_lvl+0x47/0x60 warn_alloc+0x13a/0x1b0 ? srso_alias_return_thunk+0x5/0xfbef5 ? __alloc_pages_direct_compact+0xab/0x210 __alloc_pages_slowpath.constprop.0+0xd3e/0xda0 __alloc_pages+0x32d/0x350 ? mhi_prepare_channel+0x127/0x2d0 [mhi 40df44e07c05479f7a6e7b90fba9f0e0031a7814] __kmalloc_large_node+0x72/0x110 __kmalloc+0x37c/0x480 ? mhi_map_single_no_bb+0x77/0xf0 [mhi 40df44e07c05479f7a6e7b90fba9f0e0031a7814] ? mhi_prepare_channel+0x127/0x2d0 [mhi 40df44e07c05479f7a6e7b90fba9f0e0031a7814] mhi_prepare_channel+0x127/0x2d0 [mhi 40df44e07c05479f7a6e7b90fba9f0e0031a7814] __mhi_prepare_for_transfer+0x44/0x80 [mhi 40df44e07c05479f7a6e7b90fba9f0e0031a7814] ? __pfx_____mhi_prepare_for_transfer+0x10/0x10 [mhi 40df44e07c05479f7a6e7b90fba9f0e0031a7814] device_for_each_child+0x5c/0xa0 ? __pfx_pci_pm_resume+0x10/0x10 ath11k_core_resume+0x65/0x100 [ath11k a5094e22d7223135c40d93c8f5321cf09fd85e4e] ? srso_alias_return_thunk+0x5/0xfbef5 ath11k_pci_pm_resume+0x32/0x60 [ath11k_pci 830b7bfc3ea80ebef32e563cafe2cb55e9cc73ec] ? srso_alias_return_thunk+0x5/0xfbef5 dpm_run_callback+0x8c/0x1e0 device_resume+0x104/0x340 ? __pfx_dpm_watchdog_handler+0x10/0x10 async_resume+0x1d/0x30 async_run_entry_fn+0x32/0x120 process_one_work+0x168/0x330 worker_thread+0x2f5/0x410 ? __pfx_worker_thread+0x10/0x10 kthread+0xe8/0x120 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x34/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1b/0x30 </TASK>
Actually those buffers are used only by QMI target -> host communication. And for WCN6855 and QCA6390, the largest packet size for that is less than 6KB. So change buf_len field to 8KB, which results in order 1 allocation if page size is 4KB. In this way, we can at least save some memory, and as well as decrease the possibility of allocation failure in those scenarios.
Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.30
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade kernel-rt-debug-coreUpgrade kernel-rt-coreUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-rt-debug-develUpgrade kernel-tools-libs-develUpgrade python3-perfUpgrade kernel-rt-debugUpgrade kernelUpgrade kernel-develUpgrade kernel-debug-develUpgrade kernel-headersUpgrade kernel-rt-debug-kvmUpgrade kernel-cross-headersUpgrade kernel-zfcpdump-develUpgrade kernel-rt-modules-extraUpgrade kernel-debugUpgrade kernel-debug-coreUpgrade kernel-debug-modulesUpgrade bpftoolUpgrade kernel-rt-modulesUpgrade kernel-zfcpdump-coreUpgrade kernel-rtUpgrade kernel-debug-modules-extraUpgrade kernel-tools-libsUpgrade kernel-zfcpdumpUpgrade perfUpgrade kernel-modules-extraUpgrade kernel-coreUpgrade kernel-modulesUpgrade kernel-abi-stablelistsUpgrade kernel-toolsUpgrade kernel-zfcpdump-modulesUpgrade kernel-rt-debug-modules-extraUpgrade kernel-rt-debug-modulesUpgrade kernel-docUpgrade kernel-rt-develUpgrade kernel-rt-kvm | Aug 12, 2024 | May 19, 2024 |
| Debian | — | Upgrade linux | Jul 30, 2024 | May 19, 2024 |
| Oracle_linux | — | Upgrade kernel | Aug 16, 2024 | May 19, 2024 |
| Redhat_linux | — | Upgrade kernel-rtUpgrade kernelNo solution exists | Aug 12, 2024 | May 19, 2024 |
| Rocky_linux | — | Upgrade kernel-rt-kvmUpgrade bpftool-debuginfoUpgrade kernel-coreUpgrade kernel-develUpgrade kernel-rt-coreUpgrade kernel-rt-debug-modulesUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debug-debuginfoUpgrade kernel-rt-debuginfo-common-x86_64Upgrade kernelUpgrade kernel-rt-modules-extraUpgrade kernel-rt-debugUpgrade bpftoolUpgrade kernel-tools-debuginfoUpgrade kernel-cross-headersUpgrade kernel-tools-libsUpgrade kernel-rt-develUpgrade kernel-debug-coreUpgrade python3-perf-debuginfoUpgrade kernel-rt-debuginfoUpgrade kernel-rt-debug-coreUpgrade kernel-debuginfoUpgrade kernel-debugUpgrade kernel-modules-extraUpgrade kernel-debug-modulesUpgrade kernel-debug-modules-extraUpgrade kernel-modulesUpgrade kernel-rt-debug-debuginfoUpgrade kernel-debug-develUpgrade kernel-toolsUpgrade perfUpgrade kernel-rtUpgrade python3-perfUpgrade perf-debuginfoUpgrade kernel-rt-debug-modules-extraUpgrade kernel-rt-debug-develUpgrade kernel-tools-libs-develUpgrade kernel-rt-modulesUpgrade kernel-headersUpgrade kernel-rt-debug-kvm | Aug 22, 2024 | May 19, 2024 |
| Suse | — | Upgrade kernel-default-develUpgrade kernel-rt-vdsoUpgrade kernel-rt_debugUpgrade kernel-kvmsmall-develUpgrade dtb-broadcomUpgrade kernel-obs-buildUpgrade dtb-marvellUpgrade kselftests-kmp-defaultUpgrade dtb-qcomUpgrade kselftests-kmp-64kbUpgrade dtb-amlogicUpgrade dtb-freescaleUpgrade kernel-rt-livepatch-develUpgrade kernel-obs-qaUpgrade cluster-md-kmp-defaultUpgrade dtb-exynosUpgrade kernel-rtUpgrade kernel-source-azureUpgrade kernel-syms-rtUpgrade kernel-kvmsmall-vdsoUpgrade kernel-rt-optionalUpgrade dtb-lgUpgrade reiserfs-kmp-64kbUpgrade kernel-syms-azureUpgrade dtb-armUpgrade ocfs2-kmp-64kbUpgrade gfs2-kmp-64kbUpgrade kernel-source-rtUpgrade kernel-debug-livepatch-develUpgrade dlm-kmp-azureUpgrade kernel-64kb-livepatch-develUpgrade kernel-docsUpgrade kernel-default-base-rebuildUpgrade dtb-rockchipUpgrade kernel-default-extraUpgrade kernel-devel-azureUpgrade kernel-azure-develUpgrade kernel-docs-htmlUpgrade dlm-kmp-64kbUpgrade kernel-kvmsmallUpgrade kernel-zfcpdumpUpgrade kernel-azure-livepatch-develUpgrade kernel-macrosUpgrade kernel-64kbUpgrade kernel-sourceUpgrade gfs2-kmp-rtUpgrade kernel-rt_debug-vdsoUpgrade dtb-apmUpgrade kernel-azure-vdsoUpgrade dtb-amazonUpgrade cluster-md-kmp-azureUpgrade ocfs2-kmp-rtUpgrade dtb-socionextUpgrade kernel-symsUpgrade reiserfs-kmp-defaultUpgrade kselftests-kmp-rtUpgrade reiserfs-kmp-azureUpgrade kernel-debugUpgrade dtb-xilinxUpgrade dtb-sprdUpgrade dtb-alteraUpgrade kselftests-kmp-azureUpgrade kernel-rt_debug-develUpgrade kernel-default-livepatch-develUpgrade dtb-renesasUpgrade kernel-azure-optionalUpgrade ocfs2-kmp-defaultUpgrade kernel-debug-develUpgrade cluster-md-kmp-64kbUpgrade kernel-devel-rtUpgrade kernel-default-vdsoUpgrade kernel-default-baseUpgrade kernel-debug-vdsoUpgrade kernel-azureUpgrade dtb-amdUpgrade dtb-allwinnerUpgrade dlm-kmp-rtUpgrade kernel-source-vanillaUpgrade kernel-rt-livepatchUpgrade kernel-rt_debug-livepatch-develUpgrade kernel-64kb-extraUpgrade gfs2-kmp-azureUpgrade kernel-defaultUpgrade kernel-azure-extraUpgrade kernel-64kb-optionalUpgrade dlm-kmp-defaultUpgrade kernel-64kb-develUpgrade kernel-kvmsmall-livepatch-develUpgrade dtb-mediatekUpgrade kernel-develUpgrade dtb-caviumUpgrade gfs2-kmp-defaultUpgrade kernel-default-optionalUpgrade kernel-default-livepatchUpgrade cluster-md-kmp-rtUpgrade ocfs2-kmp-azureUpgrade reiserfs-kmp-rtUpgrade dtb-appleUpgrade kernel-rt-develUpgrade kernel-rt-extraUpgrade dtb-nvidiaUpgrade dtb-hisilicon | Jun 13, 2024 | May 19, 2024 |
| Ubuntu | — | Upgrade linux-image-6.8.0-38-genericUpgrade linux-image-azure-fde-lts-22.04Upgrade linux-image-5.15.0-1058-ibmUpgrade linux-image-5.15.0-116-lowlatencyUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-6.8.0-1008-ibmUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-ibm-classicUpgrade linux-image-5.15.0-116-generic-64kUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-6.8.0-1010-azureUpgrade linux-image-oem-20.04dUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-nvidia-64kUpgrade linux-image-6.8.0-1006-gkeUpgrade linux-image-intel-iotgUpgrade linux-image-azureUpgrade linux-image-5.15.0-1048-gkeopUpgrade linux-image-6.8.0-1007-intelUpgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-azure-cvmUpgrade linux-image-5.15.0-1060-nvidia-lowlatencyUpgrade linux-image-virtual-hwe-20.04Upgrade linux-image-6.8.0-1007-raspiUpgrade linux-image-oem-24.04aUpgrade linux-image-oracle-64kUpgrade linux-image-5.15.0-1065-awsUpgrade linux-image-gcpUpgrade linux-image-6.8.0-1008-oracle-64kUpgrade linux-image-awsUpgrade linux-image-azure-fdeUpgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-aws-lts-22.04Upgrade linux-image-oem-20.04cUpgrade linux-image-kvmUpgrade linux-image-virtualUpgrade linux-image-5.15.0-1060-intel-iotgUpgrade linux-image-6.8.0-1008-oracleUpgrade linux-image-5.15.0-116-genericUpgrade linux-image-5.15.0-1068-azure-fdeUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-5.15.0-1064-gcpUpgrade linux-image-6.8.0-1009-nvidia-64kUpgrade linux-image-lowlatency-64kUpgrade linux-image-5.15.0-1062-gkeUpgrade linux-image-generic-lpaeUpgrade linux-image-5.15.0-1062-kvmUpgrade linux-image-nvidiaUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-5.15.0-1060-nvidiaUpgrade linux-image-gkeUpgrade linux-image-gke-5.15Upgrade linux-image-gkeop-5.15Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-raspi-nolpaeUpgrade linux-image-generic-64kUpgrade linux-image-oracleUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-azure-lts-22.04Upgrade linux-image-6.8.0-1008-oemUpgrade linux-image-6.8.0-38-lowlatencyUpgrade linux-image-6.8.0-1011-awsUpgrade linux-image-5.15.0-116-lowlatency-64kUpgrade linux-image-5.15.0-116-generic-lpaeUpgrade linux-image-intelUpgrade linux-image-5.15.0-1035-xilinx-zynqmpUpgrade linux-image-5.15.0-1058-raspiUpgrade linux-image-6.8.0-1009-nvidiaUpgrade linux-image-6.8.0-38-lowlatency-64kUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-5.15.0-1068-azureUpgrade linux-image-5.15.0-1065-gcpUpgrade linux-image-6.8.0-1010-gcpUpgrade linux-image-oem-20.04bUpgrade linux-image-ibmUpgrade linux-image-oracle-lts-22.04Upgrade linux-image-lowlatencyUpgrade linux-image-raspiUpgrade linux-image-genericUpgrade linux-image-oem-24.04Upgrade linux-image-6.8.0-1010-azure-fdeUpgrade linux-image-6.8.0-38-generic-64kUpgrade linux-image-gkeopUpgrade linux-image-5.15.0-1063-oracleUpgrade linux-image-oem-20.04 | Jul 12, 2024 | May 19, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 14, 2025 | May 19, 2024 |
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