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