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
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade kernel-rtUpgrade kernel-docUpgrade perfUpgrade kernel-zfcpdumpUpgrade kernel-modulesUpgrade kernel-coreUpgrade kernel-debug-modules-extraUpgrade kernel-debug-modulesUpgrade kernel-tools-libsUpgrade kernel-abi-stablelistsUpgrade kernel-rt-debug-modules-extraUpgrade kernel-modules-extraUpgrade kernel-rt-modulesUpgrade kernel-zfcpdump-modulesUpgrade kernel-toolsUpgrade kernel-zfcpdump-coreUpgrade kernel-rt-develUpgrade kernel-rt-kvmUpgrade bpftoolUpgrade kernel-rt-debug-modulesUpgrade kernel-develUpgrade kernel-debugUpgrade python3-perfUpgrade kernel-rt-coreUpgrade kernel-debug-develUpgrade kernelUpgrade kernel-rt-modules-extraUpgrade kernel-zfcpdump-develUpgrade kernel-rt-debug-coreUpgrade kernel-headersUpgrade kernel-rt-debug-develUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-rt-debugUpgrade kernel-cross-headersUpgrade kernel-tools-libs-develUpgrade kernel-rt-debug-kvmUpgrade kernel-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 | — | Upgrade kernelUpgrade kernel-rtNo solution exists | Aug 12, 2024 | May 19, 2024 |
| Rocky_linux | — | Upgrade kernel-rt-debugUpgrade kernel-debug-develUpgrade kernel-modules-extraUpgrade kernel-rt-develUpgrade kernel-tools-libsUpgrade kernel-debug-coreUpgrade kernel-rt-debug-modulesUpgrade python3-perf-debuginfoUpgrade kernel-rt-debuginfoUpgrade kernel-debug-debuginfoUpgrade kernel-coreUpgrade kernel-cross-headersUpgrade bpftool-debuginfoUpgrade kernel-develUpgrade kernelUpgrade kernel-debuginfoUpgrade kernel-rt-coreUpgrade kernel-debug-modules-extraUpgrade kernel-rt-debug-coreUpgrade kernel-modulesUpgrade kernel-tools-debuginfoUpgrade kernel-rt-kvmUpgrade bpftoolUpgrade kernel-rt-modules-extraUpgrade kernel-rt-debuginfo-common-x86_64Upgrade kernel-rt-debug-debuginfoUpgrade kernel-debugUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debug-modulesUpgrade kernel-rt-debug-modules-extraUpgrade kernel-rt-debug-develUpgrade kernel-headersUpgrade kernel-toolsUpgrade perfUpgrade kernel-rt-modulesUpgrade kernel-rt-debug-kvmUpgrade kernel-tools-libs-develUpgrade python3-perfUpgrade kernel-rtUpgrade perf-debuginfo | Aug 22, 2024 | May 19, 2024 |
| Suse | — | Upgrade dtb-exynosUpgrade dtb-marvellUpgrade dtb-broadcomUpgrade dtb-qcomUpgrade kernel-default-develUpgrade kernel-rt-vdsoUpgrade kernel-rt_debugUpgrade kselftests-kmp-64kbUpgrade kernel-azure-vdsoUpgrade dtb-apmUpgrade kernel-64kbUpgrade gfs2-kmp-rtUpgrade kernel-symsUpgrade dtb-amazonUpgrade dtb-amlogicUpgrade kernel-kvmsmall-develUpgrade kernel-rtUpgrade cluster-md-kmp-azureUpgrade kernel-obs-qaUpgrade kernel-zfcpdumpUpgrade ocfs2-kmp-rtUpgrade dlm-kmp-64kbUpgrade dtb-lgUpgrade kernel-azure-develUpgrade reiserfs-kmp-64kbUpgrade kernel-docs-htmlUpgrade kernel-source-azureUpgrade kernel-default-base-rebuildUpgrade dtb-socionextUpgrade kernel-debug-livepatch-develUpgrade dtb-freescaleUpgrade kernel-rt-optionalUpgrade kernel-syms-rtUpgrade gfs2-kmp-64kbUpgrade kernel-obs-buildUpgrade kernel-default-extraUpgrade kernel-devel-azureUpgrade kernel-kvmsmall-vdsoUpgrade kernel-kvmsmallUpgrade kernel-syms-azureUpgrade kernel-rt-livepatch-develUpgrade cluster-md-kmp-defaultUpgrade kselftests-kmp-defaultUpgrade dtb-armUpgrade kernel-macrosUpgrade kernel-azure-livepatch-develUpgrade kernel-sourceUpgrade kernel-rt_debug-vdsoUpgrade ocfs2-kmp-64kbUpgrade dtb-rockchipUpgrade kernel-docsUpgrade kernel-source-rtUpgrade dlm-kmp-azureUpgrade kernel-64kb-livepatch-develUpgrade dtb-sprdUpgrade dtb-alteraUpgrade dtb-nvidiaUpgrade dtb-xilinxUpgrade kernel-default-vdsoUpgrade kernel-azureUpgrade dtb-amdUpgrade dtb-allwinnerUpgrade dlm-kmp-rtUpgrade cluster-md-kmp-64kbUpgrade kernel-devel-rtUpgrade kernel-64kb-extraUpgrade kernel-debug-develUpgrade kernel-default-optionalUpgrade dtb-hisiliconUpgrade kernel-rt_debug-develUpgrade kselftests-kmp-azureUpgrade kernel-default-livepatch-develUpgrade kernel-rt-extraUpgrade dtb-appleUpgrade reiserfs-kmp-rtUpgrade kernel-azure-optionalUpgrade ocfs2-kmp-defaultUpgrade kernel-kvmsmall-livepatch-develUpgrade dtb-caviumUpgrade gfs2-kmp-defaultUpgrade kernel-64kb-develUpgrade ocfs2-kmp-azureUpgrade kernel-rt_debug-livepatch-develUpgrade kernel-rt-livepatchUpgrade kernel-defaultUpgrade kernel-64kb-optionalUpgrade gfs2-kmp-azureUpgrade kernel-default-livepatchUpgrade dtb-mediatekUpgrade cluster-md-kmp-rtUpgrade reiserfs-kmp-defaultUpgrade kernel-azure-extraUpgrade dtb-renesasUpgrade reiserfs-kmp-azureUpgrade kselftests-kmp-rtUpgrade kernel-rt-develUpgrade kernel-develUpgrade kernel-source-vanillaUpgrade dlm-kmp-defaultUpgrade kernel-debugUpgrade kernel-default-baseUpgrade kernel-debug-vdso | Jun 13, 2024 | May 19, 2024 |
| Ubuntu | — | Upgrade linux-image-5.15.0-1035-xilinx-zynqmpUpgrade linux-image-5.15.0-1062-kvmUpgrade linux-image-6.8.0-1010-azure-fdeUpgrade linux-image-5.15.0-1060-nvidiaUpgrade linux-image-nvidiaUpgrade linux-image-gkeUpgrade linux-image-5.15.0-1063-oracleUpgrade linux-image-5.15.0-116-generic-lpaeUpgrade linux-image-lowlatencyUpgrade linux-image-raspiUpgrade linux-image-oem-20.04bUpgrade linux-image-6.8.0-38-generic-64kUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-5.15.0-1058-raspiUpgrade linux-image-oracle-lts-22.04Upgrade linux-image-5.15.0-116-lowlatency-64kUpgrade linux-image-intelUpgrade linux-image-6.8.0-1009-nvidia-64kUpgrade linux-image-5.15.0-1062-gkeUpgrade linux-image-6.8.0-1009-nvidiaUpgrade linux-image-lowlatency-64kUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-gke-5.15Upgrade linux-image-5.15.0-1068-azureUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-oem-20.04Upgrade linux-image-gkeop-5.15Upgrade linux-image-raspi-nolpaeUpgrade linux-image-genericUpgrade linux-image-6.8.0-1008-oemUpgrade linux-image-generic-64kUpgrade linux-image-ibmUpgrade linux-image-oem-24.04Upgrade linux-image-gcp-lts-22.04Upgrade linux-image-6.8.0-38-lowlatencyUpgrade linux-image-6.8.0-1011-awsUpgrade linux-image-6.8.0-38-lowlatency-64kUpgrade linux-image-generic-lpaeUpgrade linux-image-oracleUpgrade linux-image-5.15.0-1065-gcpUpgrade linux-image-azure-lts-22.04Upgrade linux-image-gkeopUpgrade linux-image-6.8.0-1010-gcpUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-azure-fde-lts-22.04Upgrade linux-image-6.8.0-38-genericUpgrade linux-image-gcpUpgrade linux-image-6.8.0-1008-ibmUpgrade linux-image-6.8.0-1007-intelUpgrade linux-image-awsUpgrade linux-image-oem-24.04aUpgrade linux-image-5.15.0-1058-ibmUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-oracle-64kUpgrade linux-image-5.15.0-116-lowlatencyUpgrade linux-image-5.15.0-116-genericUpgrade linux-image-azureUpgrade linux-image-ibm-classicUpgrade linux-image-5.15.0-1048-gkeopUpgrade linux-image-intel-iotgUpgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-oem-20.04dUpgrade linux-image-oem-20.04cUpgrade linux-image-6.8.0-1006-gkeUpgrade linux-image-5.15.0-1065-awsUpgrade linux-image-virtual-hwe-20.04Upgrade linux-image-5.15.0-1060-intel-iotgUpgrade linux-image-nvidia-64kUpgrade linux-image-5.15.0-116-generic-64kUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-azure-cvmUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-6.8.0-1010-azureUpgrade linux-image-kvmUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-virtualUpgrade linux-image-6.8.0-1008-oracle-64kUpgrade linux-image-5.15.0-1068-azure-fdeUpgrade linux-image-5.15.0-1060-nvidia-lowlatencyUpgrade linux-image-azure-fdeUpgrade linux-image-6.8.0-1007-raspiUpgrade linux-image-6.8.0-1008-oracleUpgrade linux-image-aws-lts-22.04Upgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-5.15.0-1064-gcp | 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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