| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbus: mhi: pci_generic: Remove WQ_MEM_RECLAIM flag from state workqueue\n\nA recent change created a dedicated workqueue for the state-change work\nwith WQ_HIGHPRI (no strong reason for that) and WQ_MEM_RECLAIM flags,\nbut the state-change work (mhi_pm_st_worker) does not guarantee forward\nprogress under memory pressure, and will even wait on various memory\nallocations when e.g. creating devices, loading firmware, etc... The\nwork is then not part of a memory reclaim path...\n\nMoreover, this causes a warning in check_flush_dependency() since we end\nup in code that flushes a non-reclaim workqueue:\n\n[ 40.969601] workqueue: WQ_MEM_RECLAIM mhi_hiprio_wq:mhi_pm_st_worker [mhi] is flushing !WQ_MEM_RECLAIM events_highpri:flush_backlog\n[ 40.969612] WARNING: CPU: 4 PID: 158 at kernel/workqueue.c:2607 check_flush_dependency+0x11c/0x140\n[ 40.969733] Call Trace:\n[ 40.969740] __flush_work+0x97/0x1d0\n[ 40.969745] ? wake_up_process+0x15/0x20\n[ 40.969749] ? insert_work+0x70/0x80\n[ 40.969750] ? __queue_work+0x14a/0x3e0\n[ 40.969753] flush_work+0x10/0x20\n[ 40.969756] rollback_registered_many+0x1c9/0x510\n[ 40.969759] unregister_netdevice_queue+0x94/0x120\n[ 40.969761] unregister_netdev+0x1d/0x30\n[ 40.969765] mhi_net_remove+0x1a/0x40 [mhi_net]\n[ 40.969770] mhi_driver_remove+0x124/0x250 [mhi]\n[ 40.969776] device_release_driver_internal+0xf0/0x1d0\n[ 40.969778] device_release_driver+0x12/0x20\n[ 40.969782] bus_remove_device+0xe1/0x150\n[ 40.969786] device_del+0x17b/0x3e0\n[ 40.969791] mhi_destroy_device+0x9a/0x100 [mhi]\n[ 40.969796] ? mhi_unmap_single_use_bb+0x50/0x50 [mhi]\n[ 40.969799] device_for_each_child+0x5e/0xa0\n[ 40.969804] mhi_pm_st_worker+0x921/0xf50 [mhi]" |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "drivers/bus/mhi/core/init.c" |
| ], |
| "versions": [ |
| { |
| "version": "8f70397876872789b2a5deba804eb6216fb5deb7", |
| "lessThan": "abd1510c08a13c88d24b622a83c82e87ff1d3135", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "8f70397876872789b2a5deba804eb6216fb5deb7", |
| "lessThan": "ed541cff35cbdb695f0c98ef506dd7218883fc07", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "8f70397876872789b2a5deba804eb6216fb5deb7", |
| "lessThan": "0fccbf0a3b690b162f53b13ed8bc442ea33437dc", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "affected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "drivers/bus/mhi/core/init.c" |
| ], |
| "versions": [ |
| { |
| "version": "5.11", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "5.11", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.11.20", |
| "lessThanOrEqual": "5.11.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.12.3", |
| "lessThanOrEqual": "5.12.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.13", |
| "lessThanOrEqual": "*", |
| "status": "unaffected", |
| "versionType": "original_commit_for_fix" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.11", |
| "versionEndExcluding": "5.11.20" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.11", |
| "versionEndExcluding": "5.12.3" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.11", |
| "versionEndExcluding": "5.13" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/abd1510c08a13c88d24b622a83c82e87ff1d3135" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/ed541cff35cbdb695f0c98ef506dd7218883fc07" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/0fccbf0a3b690b162f53b13ed8bc442ea33437dc" |
| } |
| ], |
| "title": "bus: mhi: pci_generic: Remove WQ_MEM_RECLAIM flag from state workqueue", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2021-46970", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
