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