{ "dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": { "cveId": "CVE-2024-39476", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-06-25T14:23:23.746Z", "datePublished": "2024-07-05T06:55:06.559Z", "dateUpdated": "2024-08-02T04:26:15.248Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-07-15T06:50:11.447Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid5: fix deadlock that raid5d() wait for itself to clear MD_SB_CHANGE_PENDING\n\nXiao reported that lvm2 test lvconvert-raid-takeover.sh can hang with\nsmall possibility, the root cause is exactly the same as commit\nbed9e27baf52 (\"Revert \"md/raid5: Wait for MD_SB_CHANGE_PENDING in raid5d\"\")\n\nHowever, Dan reported another hang after that, and junxiao investigated\nthe problem and found out that this is caused by plugged bio can't issue\nfrom raid5d().\n\nCurrent implementation in raid5d() has a weird dependence:\n\n1) md_check_recovery() from raid5d() must hold 'reconfig_mutex' to clear\n MD_SB_CHANGE_PENDING;\n2) raid5d() handles IO in a deadloop, until all IO are issued;\n3) IO from raid5d() must wait for MD_SB_CHANGE_PENDING to be cleared;\n\nThis behaviour is introduce before v2.6, and for consequence, if other\ncontext hold 'reconfig_mutex', and md_check_recovery() can't update\nsuper_block, then raid5d() will waste one cpu 100% by the deadloop, until\n'reconfig_mutex' is released.\n\nRefer to the implementation from raid1 and raid10, fix this problem by\nskipping issue IO if MD_SB_CHANGE_PENDING is still set after\nmd_check_recovery(), daemon thread will be woken up when 'reconfig_mutex'\nis released. Meanwhile, the hang problem will be fixed as well." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/md/raid5.c" ], "versions": [ { "version": "f3d55bd5b7b9", "lessThan": "b32aa95843ca", "status": "affected", "versionType": "git" }, { "version": "1c00bb624cd0", "lessThan": "634ba3c97ec4", "status": "affected", "versionType": "git" }, { "version": "782b3e71c957", "lessThan": "aa64464c8f4d", "status": "affected", "versionType": "git" }, { "version": "9e86dffd0b02", "lessThan": "098d54934814", "status": "affected", "versionType": "git" }, { "version": "5e2cf333b7bd", "lessThan": "3f8d5e802d4c", "status": "affected", "versionType": "git" }, { "version": "5e2cf333b7bd", "lessThan": "cd2538e5af49", "status": "affected", "versionType": "git" }, { "version": "5e2cf333b7bd", "lessThan": "e332a12f65d8", "status": "affected", "versionType": "git" }, { "version": "5e2cf333b7bd", "lessThan": "151f66bb618d", "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/raid5.c" ], "versions": [ { "version": "6.1", "status": "affected" }, { "version": "0", "lessThan": "6.1", "status": "unaffected", "versionType": "custom" }, { "version": "4.19.316", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.4.278", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.219", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.161", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.1.94", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.6.34", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.9.5", "lessThanOrEqual": "6.9.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.10", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/b32aa95843cac6b12c2c014d40fca18aef24a347" }, { "url": "https://git.kernel.org/stable/c/634ba3c97ec413cb10681c7b196db43ee461ecf4" }, { "url": "https://git.kernel.org/stable/c/aa64464c8f4d2ab92f6d0b959a1e0767b829d787" }, { "url": "https://git.kernel.org/stable/c/098d54934814dd876963abfe751c3b1cf7fbe56a" }, { "url": "https://git.kernel.org/stable/c/3f8d5e802d4cedd445f9a89be8c3fd2d0e99024b" }, { "url": "https://git.kernel.org/stable/c/cd2538e5af495b3c747e503db346470fc1ffc447" }, { "url": "https://git.kernel.org/stable/c/e332a12f65d8fed8cf63bedb4e9317bb872b9ac7" }, { "url": "https://git.kernel.org/stable/c/151f66bb618d1fd0eeb84acb61b4a9fa5d8bb0fa" } ], "title": "md/raid5: fix deadlock that raid5d() wait for itself to clear MD_SB_CHANGE_PENDING", "x_generator": { "engine": "bippy-c9c4e1df01b2" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-07-08T15:14:06.487642Z", "id": "CVE-2024-39476", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-07-08T15:14:14.582Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T04:26:15.248Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/b32aa95843cac6b12c2c014d40fca18aef24a347", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/634ba3c97ec413cb10681c7b196db43ee461ecf4", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/aa64464c8f4d2ab92f6d0b959a1e0767b829d787", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/098d54934814dd876963abfe751c3b1cf7fbe56a", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/3f8d5e802d4cedd445f9a89be8c3fd2d0e99024b", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/cd2538e5af495b3c747e503db346470fc1ffc447", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/e332a12f65d8fed8cf63bedb4e9317bb872b9ac7", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/151f66bb618d1fd0eeb84acb61b4a9fa5d8bb0fa", "tags": [ "x_transferred" ] } ] } ] } }