| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmwifiex: bring down link before deleting interface\n\nWe can deadlock when rmmod'ing the driver or going through firmware\nreset, because the cfg80211_unregister_wdev() has to bring down the link\nfor us, ... which then grab the same wiphy lock.\n\nnl80211_del_interface() already handles a very similar case, with a nice\ndescription:\n\n /*\n * We hold RTNL, so this is safe, without RTNL opencount cannot\n * reach 0, and thus the rdev cannot be deleted.\n *\n * We need to do it for the dev_close(), since that will call\n * the netdev notifiers, and we need to acquire the mutex there\n * but don't know if we get there from here or from some other\n * place (e.g. \"ip link set ... down\").\n */\n mutex_unlock(&rdev->wiphy.mtx);\n...\n\nDo similarly for mwifiex teardown, by ensuring we bring the link down\nfirst.\n\nSample deadlock trace:\n\n[ 247.103516] INFO: task rmmod:2119 blocked for more than 123 seconds.\n[ 247.110630] Not tainted 5.12.4 #5\n[ 247.115796] \"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\n[ 247.124557] task:rmmod state:D stack: 0 pid: 2119 ppid: 2114 flags:0x00400208\n[ 247.133905] Call trace:\n[ 247.136644] __switch_to+0x130/0x170\n[ 247.140643] __schedule+0x714/0xa0c\n[ 247.144548] schedule_preempt_disabled+0x88/0xf4\n[ 247.149714] __mutex_lock_common+0x43c/0x750\n[ 247.154496] mutex_lock_nested+0x5c/0x68\n[ 247.158884] cfg80211_netdev_notifier_call+0x280/0x4e0 [cfg80211]\n[ 247.165769] raw_notifier_call_chain+0x4c/0x78\n[ 247.170742] call_netdevice_notifiers_info+0x68/0xa4\n[ 247.176305] __dev_close_many+0x7c/0x138\n[ 247.180693] dev_close_many+0x7c/0x10c\n[ 247.184893] unregister_netdevice_many+0xfc/0x654\n[ 247.190158] unregister_netdevice_queue+0xb4/0xe0\n[ 247.195424] _cfg80211_unregister_wdev+0xa4/0x204 [cfg80211]\n[ 247.201816] cfg80211_unregister_wdev+0x20/0x2c [cfg80211]\n[ 247.208016] mwifiex_del_virtual_intf+0xc8/0x188 [mwifiex]\n[ 247.214174] mwifiex_uninit_sw+0x158/0x1b0 [mwifiex]\n[ 247.219747] mwifiex_remove_card+0x38/0xa0 [mwifiex]\n[ 247.225316] mwifiex_pcie_remove+0xd0/0xe0 [mwifiex_pcie]\n[ 247.231451] pci_device_remove+0x50/0xe0\n[ 247.235849] device_release_driver_internal+0x110/0x1b0\n[ 247.241701] driver_detach+0x5c/0x9c\n[ 247.245704] bus_remove_driver+0x84/0xb8\n[ 247.250095] driver_unregister+0x3c/0x60\n[ 247.254486] pci_unregister_driver+0x2c/0x90\n[ 247.259267] cleanup_module+0x18/0xcdc [mwifiex_pcie]" |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "drivers/net/wireless/marvell/mwifiex/main.c" |
| ], |
| "versions": [ |
| { |
| "version": "a05829a7222e9d10c416dd2dbbf3929fe6646b89", |
| "lessThan": "a3041d39d3c14da97fa3476835aba043ba810cf0", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "a05829a7222e9d10c416dd2dbbf3929fe6646b89", |
| "lessThan": "35af69c7c0490fdccfc159c6a87e4d1dc070838a", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "a05829a7222e9d10c416dd2dbbf3929fe6646b89", |
| "lessThan": "1f9482aa8d412b4ba06ce6ab8e333fb8ca29a06e", |
| "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/net/wireless/marvell/mwifiex/main.c" |
| ], |
| "versions": [ |
| { |
| "version": "5.12", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "5.12", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.12.18", |
| "lessThanOrEqual": "5.12.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.13.3", |
| "lessThanOrEqual": "5.13.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.14", |
| "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": "5.12", |
| "versionEndExcluding": "5.12.18" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.12", |
| "versionEndExcluding": "5.13.3" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.12", |
| "versionEndExcluding": "5.14" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/a3041d39d3c14da97fa3476835aba043ba810cf0" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/35af69c7c0490fdccfc159c6a87e4d1dc070838a" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/1f9482aa8d412b4ba06ce6ab8e333fb8ca29a06e" |
| } |
| ], |
| "title": "mwifiex: bring down link before deleting interface", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2021-47349", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
