CVE-2024-26756 (GCVE-0-2024-26756)

Vulnerability from cvelistv5 – Published: 2024-04-03 17:00 – Updated: 2026-05-11 20:03
VLAI
Title
md: Don't register sync_thread for reshape directly
Summary
In the Linux kernel, the following vulnerability has been resolved: md: Don't register sync_thread for reshape directly Currently, if reshape is interrupted, then reassemble the array will register sync_thread directly from pers->run(), in this case 'MD_RECOVERY_RUNNING' is set directly, however, there is no guarantee that md_do_sync() will be executed, hence stop_sync_thread() will hang because 'MD_RECOVERY_RUNNING' can't be cleared. Last patch make sure that md_do_sync() will set MD_RECOVERY_DONE, however, following hang can still be triggered by dm-raid test shell/lvconvert-raid-reshape.sh occasionally: [root@fedora ~]# cat /proc/1982/stack [<0>] stop_sync_thread+0x1ab/0x270 [md_mod] [<0>] md_frozen_sync_thread+0x5c/0xa0 [md_mod] [<0>] raid_presuspend+0x1e/0x70 [dm_raid] [<0>] dm_table_presuspend_targets+0x40/0xb0 [dm_mod] [<0>] __dm_destroy+0x2a5/0x310 [dm_mod] [<0>] dm_destroy+0x16/0x30 [dm_mod] [<0>] dev_remove+0x165/0x290 [dm_mod] [<0>] ctl_ioctl+0x4bb/0x7b0 [dm_mod] [<0>] dm_ctl_ioctl+0x11/0x20 [dm_mod] [<0>] vfs_ioctl+0x21/0x60 [<0>] __x64_sys_ioctl+0xb9/0xe0 [<0>] do_syscall_64+0xc6/0x230 [<0>] entry_SYSCALL_64_after_hwframe+0x6c/0x74 Meanwhile mddev->recovery is: MD_RECOVERY_RUNNING | MD_RECOVERY_INTR | MD_RECOVERY_RESHAPE | MD_RECOVERY_FROZEN Fix this problem by remove the code to register sync_thread directly from raid10 and raid5. And let md_check_recovery() to register sync_thread.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: f67055780caac6a99f43834795c43acf99eba6a6 , < 13b520fb62b772e408f9b79c5fe18ad414e90417 (git)
Affected: f67055780caac6a99f43834795c43acf99eba6a6 , < ad39c08186f8a0f221337985036ba86731d6aafe (git)
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Linux Linux Affected: 2.6.17
Unaffected: 0 , < 2.6.17 (semver)
Unaffected: 6.7.7 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
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En el \u00faltimo parche, aseg\u00farese de que md_do_sync() establezca MD_RECOVERY_DONE; sin embargo, dm-raid test shell/lvconvert-raid-reshape.sh ocasionalmente puede activar el siguiente bloqueo: [root@fedora ~]# cat /proc/1982/stack [\u0026lt;0\u0026gt;] stop_sync_thread+0x1ab/0x270 [md_mod] [\u0026lt;0\u0026gt;] md_frozen_sync_thread+0x5c/0xa0 [md_mod] [\u0026lt;0\u0026gt;] raid_presuspend+0x1e/0x70 [dm_raid] [\u0026lt;0\u0026gt;] dm_table_presuspend_targets+0x40/0xb0 [ dm_mod] [\u0026lt;0\u0026gt;] __dm_destroy+0x2a5/0x310 [dm_mod] [\u0026lt;0\u0026gt;] dm_destroy+0x16/0x30 [dm_mod] [\u0026lt;0\u0026gt;] dev_remove+0x165/0x290 [dm_mod] [\u0026lt;0\u0026gt;] ctl_ioctl+0x4bb/ 0x7b0 [dm_mod] [\u0026lt;0\u0026gt;] dm_ctl_ioctl+0x11/0x20 [dm_mod] [\u0026lt;0\u0026gt;] vfs_ioctl+0x21/0x60 [\u0026lt;0\u0026gt;] __x64_sys_ioctl+0xb9/0xe0 [\u0026lt;0\u0026gt;] do_syscall_64+0xc6/0x230 [\u0026lt;0 \u0026gt;] Entry_SYSCALL_64_after_hwframe+0x6c/0x74 Mientras tanto mddev-\u0026gt;recovery es: MD_RECOVERY_RUNNING | MD_RECOVERY_INTR | MD_RECOVERY_RESHAPE | MD_RECOVERY_FROZEN Solucione este problema eliminando el c\u00f3digo para registrar sync_thread directamente desde raid10 y raid5. 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      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/13b520fb62b772e408f9b79c5fe18ad414e90417\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/ad39c08186f8a0f221337985036ba86731d6aafe\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T00:14:13.242Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-26756\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-06-17T19:28:01.094375Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-06-17T19:28:04.987Z\"}}], \"cna\": {\"title\": \"md: Don\u0027t register sync_thread for reshape directly\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"f67055780caac6a99f43834795c43acf99eba6a6\", \"lessThan\": \"13b520fb62b772e408f9b79c5fe18ad414e90417\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"f67055780caac6a99f43834795c43acf99eba6a6\", \"lessThan\": \"ad39c08186f8a0f221337985036ba86731d6aafe\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/md/md.c\", \"drivers/md/raid10.c\", \"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\": \"affected\", \"version\": \"2.6.17\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.17\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.7.7\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.7.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/md/md.c\", \"drivers/md/raid10.c\", \"drivers/md/raid5.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/13b520fb62b772e408f9b79c5fe18ad414e90417\"}, {\"url\": \"https://git.kernel.org/stable/c/ad39c08186f8a0f221337985036ba86731d6aafe\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmd: Don\u0027t register sync_thread for reshape directly\\n\\nCurrently, if reshape is interrupted, then reassemble the array will\\nregister sync_thread directly from pers-\u003erun(), in this case\\n\u0027MD_RECOVERY_RUNNING\u0027 is set directly, however, there is no guarantee\\nthat md_do_sync() will be executed, hence stop_sync_thread() will hang\\nbecause \u0027MD_RECOVERY_RUNNING\u0027 can\u0027t be cleared.\\n\\nLast patch make sure that md_do_sync() will set MD_RECOVERY_DONE,\\nhowever, following hang can still be triggered by dm-raid test\\nshell/lvconvert-raid-reshape.sh occasionally:\\n\\n[root@fedora ~]# cat /proc/1982/stack\\n[\u003c0\u003e] stop_sync_thread+0x1ab/0x270 [md_mod]\\n[\u003c0\u003e] md_frozen_sync_thread+0x5c/0xa0 [md_mod]\\n[\u003c0\u003e] raid_presuspend+0x1e/0x70 [dm_raid]\\n[\u003c0\u003e] dm_table_presuspend_targets+0x40/0xb0 [dm_mod]\\n[\u003c0\u003e] __dm_destroy+0x2a5/0x310 [dm_mod]\\n[\u003c0\u003e] dm_destroy+0x16/0x30 [dm_mod]\\n[\u003c0\u003e] dev_remove+0x165/0x290 [dm_mod]\\n[\u003c0\u003e] ctl_ioctl+0x4bb/0x7b0 [dm_mod]\\n[\u003c0\u003e] dm_ctl_ioctl+0x11/0x20 [dm_mod]\\n[\u003c0\u003e] vfs_ioctl+0x21/0x60\\n[\u003c0\u003e] __x64_sys_ioctl+0xb9/0xe0\\n[\u003c0\u003e] do_syscall_64+0xc6/0x230\\n[\u003c0\u003e] entry_SYSCALL_64_after_hwframe+0x6c/0x74\\n\\nMeanwhile mddev-\u003erecovery is:\\nMD_RECOVERY_RUNNING |\\nMD_RECOVERY_INTR |\\nMD_RECOVERY_RESHAPE |\\nMD_RECOVERY_FROZEN\\n\\nFix this problem by remove the code to register sync_thread directly\\nfrom raid10 and raid5. And let md_check_recovery() to register\\nsync_thread.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.7\", \"versionStartIncluding\": \"2.6.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8\", \"versionStartIncluding\": \"2.6.17\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T20:03:34.014Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26756\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T20:03:34.014Z\", \"dateReserved\": \"2024-02-19T14:20:24.170Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-03T17:00:40.814Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.