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-modulesUpgrade kernel-zfcpdump-coreUpgrade kernel-zfcpdump-modulesUpgrade kernel-rt-kvmUpgrade kernel-modules-extraUpgrade kernel-zfcpdumpUpgrade kernel-abi-stablelistsUpgrade bpftoolUpgrade kernel-toolsUpgrade kernel-modulesUpgrade kernel-docUpgrade kernel-rt-debug-modulesUpgrade kernel-debug-modulesUpgrade kernel-rt-develUpgrade perfUpgrade kernel-tools-libsUpgrade kernel-debug-modules-extraUpgrade kernel-coreUpgrade kernel-rt-debug-modules-extraUpgrade kernel-rtUpgrade kernel-debugUpgrade kernel-rt-debugUpgrade kernel-cross-headersUpgrade python3-perfUpgrade kernel-headersUpgrade kernel-debug-coreUpgrade kernel-rt-coreUpgrade kernel-rt-modules-extraUpgrade kernel-develUpgrade kernel-zfcpdump-develUpgrade kernel-rt-debug-kvmUpgrade kernelUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-debug-develUpgrade kernel-tools-libs-develUpgrade kernel-rt-debug-develUpgrade kernel-rt-debug-core | 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 | — | No solution existsUpgrade kernel-rtUpgrade kernel | Aug 12, 2024 | May 19, 2024 |
| Rocky_linux | — | Upgrade bpftoolUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-rt-debuginfo-common-x86_64Upgrade kernel-debug-modulesUpgrade kernel-debug-modules-extraUpgrade kernel-modulesUpgrade kernel-debug-develUpgrade kernel-cross-headersUpgrade kernel-debugUpgrade kernel-rt-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-tools-libsUpgrade kernel-rt-debug-debuginfoUpgrade kernel-coreUpgrade kernel-rt-debug-modulesUpgrade bpftool-debuginfoUpgrade kernel-develUpgrade kernel-rt-kvmUpgrade kernel-debug-coreUpgrade kernel-modules-extraUpgrade python3-perf-debuginfoUpgrade kernel-rt-modules-extraUpgrade kernel-debug-debuginfoUpgrade kernel-rt-coreUpgrade kernelUpgrade kernel-debuginfoUpgrade kernel-rt-debugUpgrade kernel-rt-debug-coreUpgrade kernel-rt-develUpgrade kernel-tools-libs-develUpgrade python3-perfUpgrade kernel-rt-debug-modules-extraUpgrade kernel-rt-debug-develUpgrade kernel-headersUpgrade kernel-rt-modulesUpgrade kernel-rt-debug-kvmUpgrade kernel-toolsUpgrade perfUpgrade kernel-rtUpgrade perf-debuginfo | Aug 22, 2024 | May 19, 2024 |
| Suse | — | Upgrade kernel-default-livepatchUpgrade kernel-default-optionalUpgrade reiserfs-kmp-defaultUpgrade cluster-md-kmp-rtUpgrade reiserfs-kmp-azureUpgrade dtb-mediatekUpgrade kselftests-kmp-rtUpgrade kernel-debug-develUpgrade ocfs2-kmp-azureUpgrade dtb-renesasUpgrade gfs2-kmp-defaultUpgrade dtb-caviumUpgrade kernel-develUpgrade kernel-default-vdsoUpgrade dtb-allwinnerUpgrade ocfs2-kmp-defaultUpgrade kernel-kvmsmall-livepatch-develUpgrade kernel-debug-vdsoUpgrade kernel-default-baseUpgrade dlm-kmp-rtUpgrade kernel-rt-develUpgrade reiserfs-kmp-rtUpgrade kernel-azure-optionalUpgrade kernel-debugUpgrade dtb-appleUpgrade dtb-alteraUpgrade dtb-sprdUpgrade dtb-xilinxUpgrade kernel-devel-rtUpgrade gfs2-kmp-azureUpgrade dlm-kmp-defaultUpgrade kernel-source-vanillaUpgrade kernel-default-livepatch-develUpgrade kernel-64kb-optionalUpgrade kernel-rt_debug-livepatch-develUpgrade dtb-hisiliconUpgrade cluster-md-kmp-64kbUpgrade kernel-rt-extraUpgrade kernel-64kb-develUpgrade kselftests-kmp-azureUpgrade kernel-rt-livepatchUpgrade kernel-defaultUpgrade dtb-nvidiaUpgrade kernel-rt_debug-develUpgrade kernel-azure-extraUpgrade kernel-64kb-extraUpgrade dtb-amdUpgrade kernel-azureUpgrade kernel-syms-rtUpgrade dtb-amazonUpgrade kernel-obs-buildUpgrade gfs2-kmp-64kbUpgrade dtb-armUpgrade dtb-broadcomUpgrade dtb-exynosUpgrade kernel-default-develUpgrade dtb-qcomUpgrade kselftests-kmp-defaultUpgrade kernel-source-azureUpgrade kernel-kvmsmall-develUpgrade kernel-azure-livepatch-develUpgrade kernel-rtUpgrade kernel-symsUpgrade gfs2-kmp-rtUpgrade dtb-socionextUpgrade kernel-debug-livepatch-develUpgrade kernel-devel-azureUpgrade kernel-default-base-rebuildUpgrade dlm-kmp-64kbUpgrade kernel-docs-htmlUpgrade kernel-azure-develUpgrade dtb-lgUpgrade ocfs2-kmp-rtUpgrade kernel-zfcpdumpUpgrade kernel-kvmsmallUpgrade kernel-rt-optionalUpgrade reiserfs-kmp-64kbUpgrade kernel-source-rtUpgrade kernel-docsUpgrade dtb-rockchipUpgrade kernel-64kb-livepatch-develUpgrade dlm-kmp-azureUpgrade ocfs2-kmp-64kbUpgrade kernel-default-extraUpgrade kernel-kvmsmall-vdsoUpgrade dtb-apmUpgrade kernel-64kbUpgrade kernel-sourceUpgrade kernel-rt_debug-vdsoUpgrade kernel-macrosUpgrade kernel-azure-vdsoUpgrade cluster-md-kmp-azureUpgrade cluster-md-kmp-defaultUpgrade kernel-syms-azureUpgrade kernel-obs-qaUpgrade dtb-freescaleUpgrade dtb-amlogicUpgrade dtb-marvellUpgrade kernel-rt-livepatch-develUpgrade kselftests-kmp-64kbUpgrade kernel-rt_debugUpgrade kernel-rt-vdso | Jun 13, 2024 | May 19, 2024 |
| Ubuntu | — | Upgrade linux-image-intelUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-oem-20.04bUpgrade linux-image-5.15.0-116-generic-lpaeUpgrade linux-image-6.8.0-1011-awsUpgrade linux-image-6.8.0-1009-nvidiaUpgrade linux-image-gke-5.15Upgrade linux-image-gkeop-5.15Upgrade linux-image-azure-lts-22.04Upgrade linux-image-generic-64kUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-oracleUpgrade linux-image-oem-24.04Upgrade linux-image-6.8.0-38-lowlatencyUpgrade linux-image-5.15.0-1063-oracleUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-lowlatencyUpgrade linux-image-5.15.0-116-lowlatency-64kUpgrade linux-image-nvidiaUpgrade linux-image-raspi-nolpaeUpgrade linux-image-genericUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-5.15.0-1035-xilinx-zynqmpUpgrade linux-image-oem-20.04Upgrade linux-image-6.8.0-1010-gcpUpgrade linux-image-5.15.0-1062-kvmUpgrade linux-image-5.15.0-1060-nvidiaUpgrade linux-image-ibmUpgrade linux-image-raspiUpgrade linux-image-gkeopUpgrade linux-image-6.8.0-38-lowlatency-64kUpgrade linux-image-gkeUpgrade linux-image-5.15.0-1062-gkeUpgrade linux-image-5.15.0-1068-azureUpgrade linux-image-5.15.0-1065-gcpUpgrade linux-image-lowlatency-64kUpgrade linux-image-6.8.0-38-generic-64kUpgrade linux-image-6.8.0-1010-azure-fdeUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-6.8.0-1008-oemUpgrade linux-image-5.15.0-1058-raspiUpgrade linux-image-6.8.0-1009-nvidia-64kUpgrade linux-image-generic-lpaeUpgrade linux-image-oracle-lts-22.04Upgrade linux-image-6.8.0-38-genericUpgrade linux-image-azure-fde-lts-22.04Upgrade linux-image-6.8.0-1006-gkeUpgrade linux-image-awsUpgrade linux-image-5.15.0-1065-awsUpgrade linux-image-virtual-hwe-20.04Upgrade linux-image-5.15.0-1048-gkeopUpgrade linux-image-azure-cvmUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-5.15.0-1068-azure-fdeUpgrade linux-image-azureUpgrade linux-image-intel-iotgUpgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-5.15.0-1058-ibmUpgrade linux-image-gcpUpgrade linux-image-oem-24.04aUpgrade linux-image-5.15.0-116-lowlatencyUpgrade linux-image-6.8.0-1008-ibmUpgrade linux-image-azure-fdeUpgrade linux-image-kvmUpgrade linux-image-5.15.0-116-generic-64kUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-virtualUpgrade linux-image-5.15.0-116-genericUpgrade linux-image-ibm-classicUpgrade linux-image-5.15.0-1060-intel-iotgUpgrade linux-image-oem-20.04cUpgrade linux-image-nvidia-64kUpgrade linux-image-6.8.0-1007-raspiUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-oracle-64kUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-6.8.0-1010-azureUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-6.8.0-1008-oracleUpgrade linux-image-5.15.0-1064-gcpUpgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-aws-lts-22.04Upgrade linux-image-6.8.0-1008-oracle-64kUpgrade linux-image-5.15.0-1060-nvidia-lowlatencyUpgrade linux-image-oem-20.04dUpgrade linux-image-6.8.0-1007-intel | 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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