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