CVE-2022-49297

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2022-49297", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T01:49:39.302Z", "datePublished": "2025-02-26T02:01:26.628Z", "dateUpdated": "2026-05-11T18:56:58.046Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T18:56:58.046Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: fix io hung while disconnecting device\n\nIn our tests, \"qemu-nbd\" triggers a io hung:\n\nINFO: task qemu-nbd:11445 blocked for more than 368 seconds.\n Not tainted 5.18.0-rc3-next-20220422-00003-g2176915513ca #884\n\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\ntask:qemu-nbd state:D stack: 0 pid:11445 ppid: 1 flags:0x00000000\nCall Trace:\n <TASK>\n __schedule+0x480/0x1050\n ? _raw_spin_lock_irqsave+0x3e/0xb0\n schedule+0x9c/0x1b0\n blk_mq_freeze_queue_wait+0x9d/0xf0\n ? ipi_rseq+0x70/0x70\n blk_mq_freeze_queue+0x2b/0x40\n nbd_add_socket+0x6b/0x270 [nbd]\n nbd_ioctl+0x383/0x510 [nbd]\n blkdev_ioctl+0x18e/0x3e0\n __x64_sys_ioctl+0xac/0x120\n do_syscall_64+0x35/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\nRIP: 0033:0x7fd8ff706577\nRSP: 002b:00007fd8fcdfebf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\nRAX: ffffffffffffffda RBX: 0000000040000000 RCX: 00007fd8ff706577\nRDX: 000000000000000d RSI: 000000000000ab00 RDI: 000000000000000f\nRBP: 000000000000000f R08: 000000000000fbe8 R09: 000055fe497c62b0\nR10: 00000002aff20000 R11: 0000000000000246 R12: 000000000000006d\nR13: 0000000000000000 R14: 00007ffe82dc5e70 R15: 00007fd8fcdff9c0\n\n\"qemu-ndb -d\" will call ioctl 'NBD_DISCONNECT' first, however, following\nmessage was found:\n\nblock nbd0: Send disconnect failed -32\n\nWhich indicate that something is wrong with the server. Then,\n\"qemu-nbd -d\" will call ioctl 'NBD_CLEAR_SOCK', however ioctl can't clear\nrequests after commit 2516ab1543fd(\"nbd: only clear the queue on device\nteardown\"). And in the meantime, request can't complete through timeout\nbecause nbd_xmit_timeout() will always return 'BLK_EH_RESET_TIMER', which\nmeans such request will never be completed in this situation.\n\nNow that the flag 'NBD_CMD_INFLIGHT' can make sure requests won't\ncomplete multiple times, switch back to call nbd_clear_sock() in\nnbd_clear_sock_ioctl(), so that inflight requests can be cleared."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/block/nbd.c"], "versions": [{"version": "2516ab1543fdd1f9d08385d73cae51f668a9f3dc", "lessThan": "67e403136a0e1a55fef6a05f103a3979a39ad3fd", "status": "affected", "versionType": "git"}, {"version": "2516ab1543fdd1f9d08385d73cae51f668a9f3dc", "lessThan": "62d227f67a8c25d5e16f40e5290607f9306d2188", "status": "affected", "versionType": "git"}, {"version": "2516ab1543fdd1f9d08385d73cae51f668a9f3dc", "lessThan": "69893d6d7f5c10d8306c1b5fc64b71efc91aa6cd", "status": "affected", "versionType": "git"}, {"version": "2516ab1543fdd1f9d08385d73cae51f668a9f3dc", "lessThan": "f72df77600a43e59b3189e53b47f8685739867d3", "status": "affected", "versionType": "git"}, {"version": "2516ab1543fdd1f9d08385d73cae51f668a9f3dc", "lessThan": "c4ba982bd5084fa659ef518aaf159e4dab02ecda", "status": "affected", "versionType": "git"}, {"version": "2516ab1543fdd1f9d08385d73cae51f668a9f3dc", "lessThan": "54b06dc2a206b4d67349bb56b92d4bd32700b7b1", "status": "affected", "versionType": "git"}, {"version": "2516ab1543fdd1f9d08385d73cae51f668a9f3dc", "lessThan": "141318e62db87105b0103fccc59c9c5940da248d", "status": "affected", "versionType": "git"}, {"version": "2516ab1543fdd1f9d08385d73cae51f668a9f3dc", "lessThan": "09dadb5985023e27d4740ebd17e6fea4640110e5", "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/block/nbd.c"], "versions": [{"version": "4.12", "status": "affected"}, {"version": "0", "lessThan": "4.12", "status": "unaffected", "versionType": "semver"}, {"version": "4.14.283", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.247", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.198", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.122", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.47", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.17.15", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.18.4", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19", "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": "4.12", "versionEndExcluding": "4.14.283"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "4.19.247"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.4.198"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.10.122"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.15.47"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.17.15"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.18.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.19"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/67e403136a0e1a55fef6a05f103a3979a39ad3fd"}, {"url": "https://git.kernel.org/stable/c/62d227f67a8c25d5e16f40e5290607f9306d2188"}, {"url": "https://git.kernel.org/stable/c/69893d6d7f5c10d8306c1b5fc64b71efc91aa6cd"}, {"url": "https://git.kernel.org/stable/c/f72df77600a43e59b3189e53b47f8685739867d3"}, {"url": "https://git.kernel.org/stable/c/c4ba982bd5084fa659ef518aaf159e4dab02ecda"}, {"url": "https://git.kernel.org/stable/c/54b06dc2a206b4d67349bb56b92d4bd32700b7b1"}, {"url": "https://git.kernel.org/stable/c/141318e62db87105b0103fccc59c9c5940da248d"}, {"url": "https://git.kernel.org/stable/c/09dadb5985023e27d4740ebd17e6fea4640110e5"}], "title": "nbd: fix io hung while disconnecting device", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/block/nbd.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "67e403136a0e1a55fef6a05f103a3979a39ad3fd", "status": "affected", "version": "2516ab1543fdd1f9d08385d73cae51f668a9f3dc", "versionType": "git"}, {"lessThan": "62d227f67a8c25d5e16f40e5290607f9306d2188", "status": "affected", "version": "2516ab1543fdd1f9d08385d73cae51f668a9f3dc", "versionType": "git"}, {"lessThan": "69893d6d7f5c10d8306c1b5fc64b71efc91aa6cd", "status": "affected", "version": "2516ab1543fdd1f9d08385d73cae51f668a9f3dc", "versionType": "git"}, {"lessThan": "f72df77600a43e59b3189e53b47f8685739867d3", "status": "affected", "version": "2516ab1543fdd1f9d08385d73cae51f668a9f3dc", "versionType": "git"}, {"lessThan": "c4ba982bd5084fa659ef518aaf159e4dab02ecda", "status": "affected", "version": "2516ab1543fdd1f9d08385d73cae51f668a9f3dc", "versionType": "git"}, {"lessThan": "54b06dc2a206b4d67349bb56b92d4bd32700b7b1", "status": "affected", "version": "2516ab1543fdd1f9d08385d73cae51f668a9f3dc", "versionType": "git"}, {"lessThan": "141318e62db87105b0103fccc59c9c5940da248d", "status": "affected", "version": "2516ab1543fdd1f9d08385d73cae51f668a9f3dc", "versionType": "git"}, {"lessThan": "09dadb5985023e27d4740ebd17e6fea4640110e5", "status": "affected", "version": "2516ab1543fdd1f9d08385d73cae51f668a9f3dc", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/block/nbd.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.12"}, {"lessThan": "4.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "4.14.*", "status": "unaffected", "version": "4.14.283", "versionType": "semver"}, {"lessThanOrEqual": "4.19.*", "status": "unaffected", "version": "4.19.247", "versionType": "semver"}, {"lessThanOrEqual": "5.4.*", "status": "unaffected", "version": "5.4.198", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.122", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.47", "versionType": "semver"}, {"lessThanOrEqual": "5.17.*", "status": "unaffected", "version": "5.17.15", "versionType": "semver"}, {"lessThanOrEqual": "5.18.*", "status": "unaffected", "version": "5.18.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "5.19", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "42074657-A7B6-4740-88B7-67B440018C1C", "versionEndExcluding": "4.14.283", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B8CFA0F4-2D75-41F4-9753-87944A08B53B", "versionEndExcluding": "4.19.247", "versionStartIncluding": "4.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "3EC49633-14DE-4EBD-BB80-76AE2E3EABB9", "versionEndExcluding": "5.4.198", "versionStartIncluding": "4.20", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "1B42AA01-44D8-4572-95E6-FF8E374CF9C5", "versionEndExcluding": "5.10.122", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "FC042EE3-4864-4325-BE0B-4BCDBF11AA61", "versionEndExcluding": "5.15.47", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "53E7AA2E-2FB4-45CA-A22B-08B4EDBB51AD", "versionEndExcluding": "5.17.15", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "FA6D643C-6D6A-4821-8A8D-B5776B8F0103", "versionEndExcluding": "5.18.4", "versionStartIncluding": "5.18", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: fix io hung while disconnecting device\n\nIn our tests, \"qemu-nbd\" triggers a io hung:\n\nINFO: task qemu-nbd:11445 blocked for more than 368 seconds.\n Not tainted 5.18.0-rc3-next-20220422-00003-g2176915513ca #884\n\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\ntask:qemu-nbd state:D stack: 0 pid:11445 ppid: 1 flags:0x00000000\nCall Trace:\n <TASK>\n __schedule+0x480/0x1050\n ? _raw_spin_lock_irqsave+0x3e/0xb0\n schedule+0x9c/0x1b0\n blk_mq_freeze_queue_wait+0x9d/0xf0\n ? ipi_rseq+0x70/0x70\n blk_mq_freeze_queue+0x2b/0x40\n nbd_add_socket+0x6b/0x270 [nbd]\n nbd_ioctl+0x383/0x510 [nbd]\n blkdev_ioctl+0x18e/0x3e0\n __x64_sys_ioctl+0xac/0x120\n do_syscall_64+0x35/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\nRIP: 0033:0x7fd8ff706577\nRSP: 002b:00007fd8fcdfebf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\nRAX: ffffffffffffffda RBX: 0000000040000000 RCX: 00007fd8ff706577\nRDX: 000000000000000d RSI: 000000000000ab00 RDI: 000000000000000f\nRBP: 000000000000000f R08: 000000000000fbe8 R09: 000055fe497c62b0\nR10: 00000002aff20000 R11: 0000000000000246 R12: 000000000000006d\nR13: 0000000000000000 R14: 00007ffe82dc5e70 R15: 00007fd8fcdff9c0\n\n\"qemu-ndb -d\" will call ioctl 'NBD_DISCONNECT' first, however, following\nmessage was found:\n\nblock nbd0: Send disconnect failed -32\n\nWhich indicate that something is wrong with the server. Then,\n\"qemu-nbd -d\" will call ioctl 'NBD_CLEAR_SOCK', however ioctl can't clear\nrequests after commit 2516ab1543fd(\"nbd: only clear the queue on device\nteardown\"). And in the meantime, request can't complete through timeout\nbecause nbd_xmit_timeout() will always return 'BLK_EH_RESET_TIMER', which\nmeans such request will never be completed in this situation.\n\nNow that the flag 'NBD_CMD_INFLIGHT' can make sure requests won't\ncomplete multiple times, switch back to call nbd_clear_sock() in\nnbd_clear_sock_ioctl(), so that inflight requests can be cleared."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nbd: se corrige el bloqueo de E/S al desconectar el dispositivo En nuestras pruebas, \"qemu-nbd\" activa un bloqueo de E/S: INFORMACI\u00d3N: la tarea qemu-nbd:11445 estuvo bloqueada durante m\u00e1s de 368 segundos. No contaminada 5.18.0-rc3-next-20220422-00003-g2176915513ca #884 \"echo 0 &gt; /proc/sys/kernel/hung_task_timeout_secs\" deshabilita este mensaje. tarea:qemu-nbd estado:D pila: 0 pid:11445 ppid: 1 indicadores:0x00000000 Seguimiento de llamadas: __schedule+0x480/0x1050 ? _raw_spin_lock_irqsave+0x3e/0xb0 schedule+0x9c/0x1b0 blk_mq_freeze_queue_wait+0x9d/0xf0 ? ipi_rseq+0x70/0x70 blk_mq_freeze_queue+0x2b/0x40 nbd_add_socket+0x6b/0x270 [nbd] nbd_ioctl+0x383/0x510 [nbd] blkdev_ioctl+0x18e/0x3e0 __x64_sys_ioctl+0xac/0x120 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fd8ff706577 RSP: 002b:00007fd8fcdfebf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000040000000 RCX: 00007fd8ff706577 RDX: 000000000000000d RSI: 000000000000ab00 RDI: 00000000000000f RBP: 00000000000000f R08: 000000000000fbe8 R09: 000055fe497c62b0 R10: 00000002aff20000 R11: 0000000000000246 R12: 0000000000000006d R13: 00000000000000000 R14: 00007ffe82dc5e70 R15: 00007fd8fcdff9c0 \"qemu-ndb -d\" llamar\u00e1 primero a ioctl 'NBD_DISCONNECT', sin embargo, se encontr\u00f3 el siguiente mensaje: block nbd0: Send desconect failed -32 Lo que indica que algo anda mal con el servidor. Luego, \"qemu-nbd -d\" llamar\u00e1 a ioctl 'NBD_CLEAR_SOCK', sin embargo, ioctl no puede borrar las solicitudes despu\u00e9s de el commit 2516ab1543fd(\"nbd: solo limpia la cola al desmantelar el dispositivo\"). Mientras tanto, la solicitud no se puede completar despu\u00e9s del tiempo de espera porque nbd_xmit_timeout() siempre devolver\u00e1 'BLK_EH_RESET_TIMER', lo que significa que dicha solicitud nunca se completar\u00e1 en esta situaci\u00f3n. Ahora que el indicador 'NBD_CMD_INFLIGHT' puede garantizar que las solicitudes no se completen varias veces, vuelva a llamar a nbd_clear_sock() en nbd_clear_sock_ioctl(), de modo que las solicitudes en curso se puedan borrar."}], "id": "CVE-2022-49297", "lastModified": "2026-06-17T05:17:38.123", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-02-26T07:01:06.527", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/09dadb5985023e27d4740ebd17e6fea4640110e5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/141318e62db87105b0103fccc59c9c5940da248d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/54b06dc2a206b4d67349bb56b92d4bd32700b7b1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/62d227f67a8c25d5e16f40e5290607f9306d2188"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/67e403136a0e1a55fef6a05f103a3979a39ad3fd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/69893d6d7f5c10d8306c1b5fc64b71efc91aa6cd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c4ba982bd5084fa659ef518aaf159e4dab02ecda"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f72df77600a43e59b3189e53b47f8685739867d3"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2022:8267", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-162.6.1.el9_1", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2022-11-15T00:00:00Z"}, {"advisory": "RHSA-2022:8267", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-162.6.1.el9_1", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2022-11-15T00:00:00Z"}], "bugzilla": {"description": "kernel: nbd: fix io hung while disconnecting device", "id": "2348157", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2348157"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnbd: fix io hung while disconnecting device\nIn our tests, \"qemu-nbd\" triggers a io hung:\nINFO: task qemu-nbd:11445 blocked for more than 368 seconds.\nNot tainted 5.18.0-rc3-next-20220422-00003-g2176915513ca #884\n\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\ntask:qemu-nbd state:D stack: 0 pid:11445 ppid: 1 flags:0x00000000\nCall Trace:\n<TASK>\n__schedule+0x480/0x1050\n? _raw_spin_lock_irqsave+0x3e/0xb0\nschedule+0x9c/0x1b0\nblk_mq_freeze_queue_wait+0x9d/0xf0\n? ipi_rseq+0x70/0x70\nblk_mq_freeze_queue+0x2b/0x40\nnbd_add_socket+0x6b/0x270 [nbd]\nnbd_ioctl+0x383/0x510 [nbd]\nblkdev_ioctl+0x18e/0x3e0\n__x64_sys_ioctl+0xac/0x120\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x44/0xae\nRIP: 0033:0x7fd8ff706577\nRSP: 002b:00007fd8fcdfebf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\nRAX: ffffffffffffffda RBX: 0000000040000000 RCX: 00007fd8ff706577\nRDX: 000000000000000d RSI: 000000000000ab00 RDI: 000000000000000f\nRBP: 000000000000000f R08: 000000000000fbe8 R09: 000055fe497c62b0\nR10: 00000002aff20000 R11: 0000000000000246 R12: 000000000000006d\nR13: 0000000000000000 R14: 00007ffe82dc5e70 R15: 00007fd8fcdff9c0\n\"qemu-ndb -d\" will call ioctl 'NBD_DISCONNECT' first, however, following\nmessage was found:\nblock nbd0: Send disconnect failed -32\nWhich indicate that something is wrong with the server. Then,\n\"qemu-nbd -d\" will call ioctl 'NBD_CLEAR_SOCK', however ioctl can't clear\nrequests after commit 2516ab1543fd(\"nbd: only clear the queue on device\nteardown\"). And in the meantime, request can't complete through timeout\nbecause nbd_xmit_timeout() will always return 'BLK_EH_RESET_TIMER', which\nmeans such request will never be completed in this situation.\nNow that the flag 'NBD_CMD_INFLIGHT' can make sure requests won't\ncomplete multiple times, switch back to call nbd_clear_sock() in\nnbd_clear_sock_ioctl(), so that inflight requests can be cleared."], "name": "CVE-2022-49297", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49297\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49297\nhttps://lore.kernel.org/linux-cve-announce/2025022625-CVE-2022-49297-2edb@gregkh/T"], "threat_severity": "Low"}

{}