{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2024-26962", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.201Z", "datePublished": "2024-05-01T05:19:20.579Z", "dateUpdated": "2024-12-19T08:51:17.563Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-12-19T08:51:17.563Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm-raid456, md/raid456: fix a deadlock for dm-raid456 while io concurrent with reshape\n\nFor raid456, if reshape is still in progress, then IO across reshape\nposition will wait for reshape to make progress. However, for dm-raid,\nin following cases reshape will never make progress hence IO will hang:\n\n1) the array is read-only;\n2) MD_RECOVERY_WAIT is set;\n3) MD_RECOVERY_FROZEN is set;\n\nAfter commit c467e97f079f (\"md/raid6: use valid sector values to determine\nif an I/O should wait on the reshape\") fix the problem that IO across\nreshape position doesn't wait for reshape, the dm-raid test\nshell/lvconvert-raid-reshape.sh start to hang:\n\n[root@fedora ~]# cat /proc/979/stack\n[<0>] wait_woken+0x7d/0x90\n[<0>] raid5_make_request+0x929/0x1d70 [raid456]\n[<0>] md_handle_request+0xc2/0x3b0 [md_mod]\n[<0>] raid_map+0x2c/0x50 [dm_raid]\n[<0>] __map_bio+0x251/0x380 [dm_mod]\n[<0>] dm_submit_bio+0x1f0/0x760 [dm_mod]\n[<0>] __submit_bio+0xc2/0x1c0\n[<0>] submit_bio_noacct_nocheck+0x17f/0x450\n[<0>] submit_bio_noacct+0x2bc/0x780\n[<0>] submit_bio+0x70/0xc0\n[<0>] mpage_readahead+0x169/0x1f0\n[<0>] blkdev_readahead+0x18/0x30\n[<0>] read_pages+0x7c/0x3b0\n[<0>] page_cache_ra_unbounded+0x1ab/0x280\n[<0>] force_page_cache_ra+0x9e/0x130\n[<0>] page_cache_sync_ra+0x3b/0x110\n[<0>] filemap_get_pages+0x143/0xa30\n[<0>] filemap_read+0xdc/0x4b0\n[<0>] blkdev_read_iter+0x75/0x200\n[<0>] vfs_read+0x272/0x460\n[<0>] ksys_read+0x7a/0x170\n[<0>] __x64_sys_read+0x1c/0x30\n[<0>] do_syscall_64+0xc6/0x230\n[<0>] entry_SYSCALL_64_after_hwframe+0x6c/0x74\n\nThis is because reshape can't make progress.\n\nFor md/raid, the problem doesn't exist because register new sync_thread\ndoesn't rely on the IO to be done any more:\n\n1) If array is read-only, it can switch to read-write by ioctl/sysfs;\n2) md/raid never set MD_RECOVERY_WAIT;\n3) If MD_RECOVERY_FROZEN is set, mddev_suspend() doesn't hold\n 'reconfig_mutex', hence it can be cleared and reshape can continue by\n sysfs api 'sync_action'.\n\nHowever, I'm not sure yet how to avoid the problem in dm-raid yet. This\npatch on the one hand make sure raid_message() can't change\nsync_thread() through raid_message() after presuspend(), on the other\nhand detect the above 3 cases before wait for IO do be done in\ndm_suspend(), and let dm-raid requeue those IO."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/md/dm-raid.c", "drivers/md/md.c", "drivers/md/md.h", "drivers/md/raid5.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "5943a34bf6bab5801e08a55f63e1b8d5bc90dae1", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "a8d249d770cb357d16a2097b548d2e4c1c137304", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "41425f96d7aa59bc865f60f5dda3d7697b555677", "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/md/dm-raid.c", "drivers/md/md.c", "drivers/md/md.h", "drivers/md/raid5.c"], "versions": [{"version": "6.7.12", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.8.3", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.9", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/5943a34bf6bab5801e08a55f63e1b8d5bc90dae1"}, {"url": "https://git.kernel.org/stable/c/a8d249d770cb357d16a2097b548d2e4c1c137304"}, {"url": "https://git.kernel.org/stable/c/41425f96d7aa59bc865f60f5dda3d7697b555677"}], "title": "dm-raid456, md/raid456: fix a deadlock for dm-raid456 while io concurrent with reshape", "x_generator": {"engine": "bippy-5f407fcff5a0"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:21:05.628Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/5943a34bf6bab5801e08a55f63e1b8d5bc90dae1", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/a8d249d770cb357d16a2097b548d2e4c1c137304", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/41425f96d7aa59bc865f60f5dda3d7697b555677", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-26962", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:45:26.664282Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:47.573Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/5943a34bf6bab5801e08a55f63e1b8d5bc90dae1", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/a8d249d770cb357d16a2097b548d2e4c1c137304", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/41425f96d7aa59bc865f60f5dda3d7697b555677", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:21:05.628Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-26962", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:45:26.664282Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T12:42:18.750Z"}}], "cna": {"title": "dm-raid456, md/raid456: fix a deadlock for dm-raid456 while io concurrent with reshape", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "1da177e4c3f4", "lessThan": "5943a34bf6ba", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f4", "lessThan": "a8d249d770cb", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f4", "lessThan": "41425f96d7aa", "versionType": "git"}], "programFiles": ["drivers/md/dm-raid.c", "drivers/md/md.c", "drivers/md/md.h", "drivers/md/raid5.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "unaffected", "version": "6.7.12", "versionType": "semver", "lessThanOrEqual": "6.7.*"}, {"status": "unaffected", "version": "6.8.3", "versionType": "semver", "lessThanOrEqual": "6.8.*"}, {"status": "unaffected", "version": "6.9", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/md/dm-raid.c", "drivers/md/md.c", "drivers/md/md.h", "drivers/md/raid5.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/5943a34bf6bab5801e08a55f63e1b8d5bc90dae1"}, {"url": "https://git.kernel.org/stable/c/a8d249d770cb357d16a2097b548d2e4c1c137304"}, {"url": "https://git.kernel.org/stable/c/41425f96d7aa59bc865f60f5dda3d7697b555677"}], "x_generator": {"engine": "bippy-9e1c9544281a"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm-raid456, md/raid456: fix a deadlock for dm-raid456 while io concurrent with reshape\n\nFor raid456, if reshape is still in progress, then IO across reshape\nposition will wait for reshape to make progress. However, for dm-raid,\nin following cases reshape will never make progress hence IO will hang:\n\n1) the array is read-only;\n2) MD_RECOVERY_WAIT is set;\n3) MD_RECOVERY_FROZEN is set;\n\nAfter commit c467e97f079f (\"md/raid6: use valid sector values to determine\nif an I/O should wait on the reshape\") fix the problem that IO across\nreshape position doesn't wait for reshape, the dm-raid test\nshell/lvconvert-raid-reshape.sh start to hang:\n\n[root@fedora ~]# cat /proc/979/stack\n[<0>] wait_woken+0x7d/0x90\n[<0>] raid5_make_request+0x929/0x1d70 [raid456]\n[<0>] md_handle_request+0xc2/0x3b0 [md_mod]\n[<0>] raid_map+0x2c/0x50 [dm_raid]\n[<0>] __map_bio+0x251/0x380 [dm_mod]\n[<0>] dm_submit_bio+0x1f0/0x760 [dm_mod]\n[<0>] __submit_bio+0xc2/0x1c0\n[<0>] submit_bio_noacct_nocheck+0x17f/0x450\n[<0>] submit_bio_noacct+0x2bc/0x780\n[<0>] submit_bio+0x70/0xc0\n[<0>] mpage_readahead+0x169/0x1f0\n[<0>] blkdev_readahead+0x18/0x30\n[<0>] read_pages+0x7c/0x3b0\n[<0>] page_cache_ra_unbounded+0x1ab/0x280\n[<0>] force_page_cache_ra+0x9e/0x130\n[<0>] page_cache_sync_ra+0x3b/0x110\n[<0>] filemap_get_pages+0x143/0xa30\n[<0>] filemap_read+0xdc/0x4b0\n[<0>] blkdev_read_iter+0x75/0x200\n[<0>] vfs_read+0x272/0x460\n[<0>] ksys_read+0x7a/0x170\n[<0>] __x64_sys_read+0x1c/0x30\n[<0>] do_syscall_64+0xc6/0x230\n[<0>] entry_SYSCALL_64_after_hwframe+0x6c/0x74\n\nThis is because reshape can't make progress.\n\nFor md/raid, the problem doesn't exist because register new sync_thread\ndoesn't rely on the IO to be done any more:\n\n1) If array is read-only, it can switch to read-write by ioctl/sysfs;\n2) md/raid never set MD_RECOVERY_WAIT;\n3) If MD_RECOVERY_FROZEN is set, mddev_suspend() doesn't hold\n 'reconfig_mutex', hence it can be cleared and reshape can continue by\n sysfs api 'sync_action'.\n\nHowever, I'm not sure yet how to avoid the problem in dm-raid yet. This\npatch on the one hand make sure raid_message() can't change\nsync_thread() through raid_message() after presuspend(), on the other\nhand detect the above 3 cases before wait for IO do be done in\ndm_suspend(), and let dm-raid requeue those IO."}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-05T09:18:59.399Z"}}}, "cveMetadata": {"cveId": "CVE-2024-26962", "state": "PUBLISHED", "dateUpdated": "2024-11-05T09:18:59.399Z", "dateReserved": "2024-02-19T14:20:24.201Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-05-01T05:19:20.579Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D395D167-B806-45A5-9C34-38C8A1FE0F7B", "versionEndExcluding": "6.7.12", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "4C59BBC3-6495-4A77-9C82-55EC7CDF5E02", "versionEndExcluding": "6.8.3", "versionStartIncluding": "6.8", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm-raid456, md/raid456: fix a deadlock for dm-raid456 while io concurrent with reshape\n\nFor raid456, if reshape is still in progress, then IO across reshape\nposition will wait for reshape to make progress. However, for dm-raid,\nin following cases reshape will never make progress hence IO will hang:\n\n1) the array is read-only;\n2) MD_RECOVERY_WAIT is set;\n3) MD_RECOVERY_FROZEN is set;\n\nAfter commit c467e97f079f (\"md/raid6: use valid sector values to determine\nif an I/O should wait on the reshape\") fix the problem that IO across\nreshape position doesn't wait for reshape, the dm-raid test\nshell/lvconvert-raid-reshape.sh start to hang:\n\n[root@fedora ~]# cat /proc/979/stack\n[<0>] wait_woken+0x7d/0x90\n[<0>] raid5_make_request+0x929/0x1d70 [raid456]\n[<0>] md_handle_request+0xc2/0x3b0 [md_mod]\n[<0>] raid_map+0x2c/0x50 [dm_raid]\n[<0>] __map_bio+0x251/0x380 [dm_mod]\n[<0>] dm_submit_bio+0x1f0/0x760 [dm_mod]\n[<0>] __submit_bio+0xc2/0x1c0\n[<0>] submit_bio_noacct_nocheck+0x17f/0x450\n[<0>] submit_bio_noacct+0x2bc/0x780\n[<0>] submit_bio+0x70/0xc0\n[<0>] mpage_readahead+0x169/0x1f0\n[<0>] blkdev_readahead+0x18/0x30\n[<0>] read_pages+0x7c/0x3b0\n[<0>] page_cache_ra_unbounded+0x1ab/0x280\n[<0>] force_page_cache_ra+0x9e/0x130\n[<0>] page_cache_sync_ra+0x3b/0x110\n[<0>] filemap_get_pages+0x143/0xa30\n[<0>] filemap_read+0xdc/0x4b0\n[<0>] blkdev_read_iter+0x75/0x200\n[<0>] vfs_read+0x272/0x460\n[<0>] ksys_read+0x7a/0x170\n[<0>] __x64_sys_read+0x1c/0x30\n[<0>] do_syscall_64+0xc6/0x230\n[<0>] entry_SYSCALL_64_after_hwframe+0x6c/0x74\n\nThis is because reshape can't make progress.\n\nFor md/raid, the problem doesn't exist because register new sync_thread\ndoesn't rely on the IO to be done any more:\n\n1) If array is read-only, it can switch to read-write by ioctl/sysfs;\n2) md/raid never set MD_RECOVERY_WAIT;\n3) If MD_RECOVERY_FROZEN is set, mddev_suspend() doesn't hold\n 'reconfig_mutex', hence it can be cleared and reshape can continue by\n sysfs api 'sync_action'.\n\nHowever, I'm not sure yet how to avoid the problem in dm-raid yet. This\npatch on the one hand make sure raid_message() can't change\nsync_thread() through raid_message() after presuspend(), on the other\nhand detect the above 3 cases before wait for IO do be done in\ndm_suspend(), and let dm-raid requeue those IO."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: dm-raid456, md/raid456: soluciona un punto muerto para dm-raid456 mientras io concurre con reshape. Para raid456, si el reshape todav\u00eda est\u00e1 en progreso, entonces IO en la posici\u00f3n de reshape esperar\u00e1 remodelar para progresar. Sin embargo, para dm-raid, en los siguientes casos la remodelaci\u00f3n nunca progresar\u00e1, por lo que IO se bloquear\u00e1: 1) la matriz es de solo lectura; 2) MD_RECOVERY_WAIT est\u00e1 configurado; 3) MD_RECOVERY_FROZEN est\u00e1 configurado; Despu\u00e9s de confirmar c467e97f079f (\"md/raid6: use valores de sector v\u00e1lidos para determinar si una E/S debe esperar a la remodelaci\u00f3n\") solucione el problema de que IO en la posici\u00f3n de remodelaci\u00f3n no espera a la remodelaci\u00f3n, la prueba dm-raid shell/lvconvert -raid-reshape.sh comienza a colgarse: [root@fedora ~]# cat /proc/979/stack [&lt;0&gt;] wait_woken+0x7d/0x90 [&lt;0&gt;] raid5_make_request+0x929/0x1d70 [raid456] [&lt;0 &gt;] md_handle_request+0xc2/0x3b0 [md_mod] [&lt;0&gt;] raid_map+0x2c/0x50 [dm_raid] [&lt;0&gt;] __map_bio+0x251/0x380 [dm_mod] [&lt;0&gt;] dm_submit_bio+0x1f0/0x760 [dm_mod] [ &lt;0&gt;] __submit_bio+0xc2/0x1c0 [&lt;0&gt;] submit_bio_noacct_nocheck+0x17f/0x450 [&lt;0&gt;] submit_bio_noacct+0x2bc/0x780 [&lt;0&gt;] submit_bio+0x70/0xc0 [&lt;0&gt;] mpage_readahead+0x169/0x1f0 [ &lt;0&gt;] blkdev_readahead+0x18/0x30 [&lt;0&gt;] read_pages+0x7c/0x3b0 [&lt;0&gt;] page_cache_ra_unbounded+0x1ab/0x280 [&lt;0&gt;] force_page_cache_ra+0x9e/0x130 [&lt;0&gt;] page_cache_sync_ra+0x3b/0x110 [ &lt;0&gt;] filemap_get_pages+0x143/0xa30 [&lt;0&gt;] filemap_read+0xdc/0x4b0 [&lt;0&gt;] blkdev_read_iter+0x75/0x200 [&lt;0&gt;] vfs_read+0x272/0x460 [&lt;0&gt;] ksys_read+0x7a/0x170 [ &lt;0&gt;] __x64_sys_read+0x1c/0x30 [&lt;0&gt;] do_syscall_64+0xc6/0x230 [&lt;0&gt;] Entry_SYSCALL_64_after_hwframe+0x6c/0x74 Esto se debe a que la remodelaci\u00f3n no puede progresar. Para md/raid, el problema no existe porque registrar un nuevo sync_thread ya no depende de que se realice la IO: 1) Si la matriz es de solo lectura, puede cambiar a lectura-escritura mediante ioctl/sysfs; 2) md/raid nunca configur\u00f3 MD_RECOVERY_WAIT; 3) Si se configura MD_RECOVERY_FROZEN, mddev_suspend() no contiene 'reconfig_mutex', por lo tanto, se puede borrar y la remodelaci\u00f3n puede continuar mediante sysfs api 'sync_action'. Sin embargo, todav\u00eda no estoy seguro de c\u00f3mo evitar el problema en dm-raid. Este parche, por un lado, garantiza que raid_message() no pueda cambiar sync_thread() a trav\u00e9s de raid_message() despu\u00e9s de presuspend(), por otro lado detecta los 3 casos anteriores antes de esperar a que IO se realice en dm_suspend(), y deja dm-raid pone en cola esas IO."}], "id": "CVE-2024-26962", "lastModified": "2024-12-23T13:39:33.543", "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": "[email protected]", "type": "Primary"}]}, "published": "2024-05-01T06:15:12.527", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/41425f96d7aa59bc865f60f5dda3d7697b555677"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5943a34bf6bab5801e08a55f63e1b8d5bc90dae1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a8d249d770cb357d16a2097b548d2e4c1c137304"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/41425f96d7aa59bc865f60f5dda3d7697b555677"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5943a34bf6bab5801e08a55f63e1b8d5bc90dae1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a8d249d770cb357d16a2097b548d2e4c1c137304"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-667"}], "source": "[email protected]", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:9315", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}, {"advisory": "RHSA-2024:9315", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}], "bugzilla": {"description": "kernel: dm-raid456, md/raid456: fix a deadlock for dm-raid456 while io concurrent with reshape", "id": "2278174", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2278174"}, "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:\ndm-raid456, md/raid456: fix a deadlock for dm-raid456 while io concurrent with reshape\nFor raid456, if reshape is still in progress, then IO across reshape\nposition will wait for reshape to make progress. However, for dm-raid,\nin following cases reshape will never make progress hence IO will hang:\n1) the array is read-only;\n2) MD_RECOVERY_WAIT is set;\n3) MD_RECOVERY_FROZEN is set;\nAfter commit c467e97f079f (\"md/raid6: use valid sector values to determine\nif an I/O should wait on the reshape\") fix the problem that IO across\nreshape position doesn't wait for reshape, the dm-raid test\nshell/lvconvert-raid-reshape.sh start to hang:\n[root@fedora ~]# cat /proc/979/stack\n[<0>] wait_woken+0x7d/0x90\n[<0>] raid5_make_request+0x929/0x1d70 [raid456]\n[<0>] md_handle_request+0xc2/0x3b0 [md_mod]\n[<0>] raid_map+0x2c/0x50 [dm_raid]\n[<0>] __map_bio+0x251/0x380 [dm_mod]\n[<0>] dm_submit_bio+0x1f0/0x760 [dm_mod]\n[<0>] __submit_bio+0xc2/0x1c0\n[<0>] submit_bio_noacct_nocheck+0x17f/0x450\n[<0>] submit_bio_noacct+0x2bc/0x780\n[<0>] submit_bio+0x70/0xc0\n[<0>] mpage_readahead+0x169/0x1f0\n[<0>] blkdev_readahead+0x18/0x30\n[<0>] read_pages+0x7c/0x3b0\n[<0>] page_cache_ra_unbounded+0x1ab/0x280\n[<0>] force_page_cache_ra+0x9e/0x130\n[<0>] page_cache_sync_ra+0x3b/0x110\n[<0>] filemap_get_pages+0x143/0xa30\n[<0>] filemap_read+0xdc/0x4b0\n[<0>] blkdev_read_iter+0x75/0x200\n[<0>] vfs_read+0x272/0x460\n[<0>] ksys_read+0x7a/0x170\n[<0>] __x64_sys_read+0x1c/0x30\n[<0>] do_syscall_64+0xc6/0x230\n[<0>] entry_SYSCALL_64_after_hwframe+0x6c/0x74\nThis is because reshape can't make progress.\nFor md/raid, the problem doesn't exist because register new sync_thread\ndoesn't rely on the IO to be done any more:\n1) If array is read-only, it can switch to read-write by ioctl/sysfs;\n2) md/raid never set MD_RECOVERY_WAIT;\n3) If MD_RECOVERY_FROZEN is set, mddev_suspend() doesn't hold\n'reconfig_mutex', hence it can be cleared and reshape can continue by\nsysfs api 'sync_action'.\nHowever, I'm not sure yet how to avoid the problem in dm-raid yet. This\npatch on the one hand make sure raid_message() can't change\nsync_thread() through raid_message() after presuspend(), on the other\nhand detect the above 3 cases before wait for IO do be done in\ndm_suspend(), and let dm-raid requeue those IO."], "name": "CVE-2024-26962", "package_state": [{"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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Under investigation", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-26962\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-26962\nhttps://lore.kernel.org/linux-cve-announce/2024050130-CVE-2024-26962-cbb0@gregkh/T"], "threat_severity": "Low", "upstream_fix": "kernel 6.7.12, kernel 6.8.3, kernel 6.9-rc1"}