| { |
| "containers": { |
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| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "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" |
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| }, |
| { |
| "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": [ |
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| }, |
| { |
| "version": "0", |
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| "status": "unaffected", |
| "versionType": "semver" |
| }, |
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| "lessThanOrEqual": "4.19.*", |
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| }, |
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| }, |
| { |
| "version": "5.10.219", |
| "lessThanOrEqual": "5.10.*", |
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| }, |
| { |
| "version": "5.15.161", |
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| }, |
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| "version": "6.1.94", |
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| "version": "6.10", |
| "lessThanOrEqual": "*", |
| "status": "unaffected", |
| "versionType": "original_commit_for_fix" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
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| "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-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2024-39476", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
