CVE-2024-26758

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2024-26758
In the Linux kernel, the following vulnerability has been resolved: md: Don't ignore suspended array in md_check_recovery() mddev_suspend() never stop sync_thread, hence it doesn't make sense to ignore suspended array in md_check_recovery(), which might cause sync_thread can't be unregistered. After commit f52f5c71f3d4 ("md: fix stopping sync thread"), following hang can be triggered by test shell/integrity-caching.sh: 1) suspend the array: raid_postsuspend mddev_suspend 2) stop the array: raid_dtr md_stop __md_stop_writes stop_sync_thread set_bit(MD_RECOVERY_INTR, &mddev->recovery); md_wakeup_thread_directly(mddev->sync_thread); wait_event(..., !test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) 3) sync thread done: md_do_sync set_bit(MD_RECOVERY_DONE, &mddev->recovery); md_wakeup_thread(mddev->thread); 4) daemon thread can't unregister sync thread: md_check_recovery if (mddev->suspended) return; -> return directly md_read_sync_thread clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); -> MD_RECOVERY_RUNNING can't be cleared, hence step 2 hang; This problem is not just related to dm-raid, fix it by ignoring suspended array in md_check_recovery(). And follow up patches will improve dm-raid better to frozen sync thread during suspend.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/1baae052cccd08daf9a9d64c3f959d8cdb689757
https://git.kernel.org/stable/c/a55f0d6179a19c6b982e2dc344d58c98647a3be0
Configurations

No configuration.

History

04 Nov 2024, 18:35

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CWE CWE-129
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: md: No ignorar la matriz suspendida en md_check_recovery() mddev_suspend() nunca detiene sync_thread, por lo tanto, no tiene sentido ignorar la matriz suspendida en md_check_recovery(), lo que podría causar sync_thread no se puede cancelar el registro. Después de commit f52f5c71f3d4 ("md: arreglar la detención del hilo de sincronización"), el siguiente bloqueo se puede activar mediante test shell/integrity-caching.sh: 1) suspender la matriz: raid_postsuspend mddev_suspend 2) detener la matriz: raid_dtr md_stop __md_stop_writes stop_sync_thread set_bit(MD_RECOVERY_INTR , &mddev->recuperación); md_wakeup_thread_directly(mddev->sync_thread); wait_event(..., !test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) 3) hilo de sincronización realizado: md_do_sync set_bit(MD_RECOVERY_DONE, &mddev->recovery); md_wakeup_thread(mddev->thread); 4) el hilo del demonio no puede cancelar el registro del hilo de sincronización: md_check_recovery si (mddev->suspended) regresa; -> devolver directamente md_read_sync_thread clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); -> MD_RECOVERY_RUNNING no se puede borrar, por lo tanto el paso 2 se bloquea; Este problema no solo está relacionado con dm-raid; solucionelo ignorando la matriz suspendida en md_check_recovery(). Y los parches de seguimiento mejorarán mejor dm-raid para congelar el hilo de sincronización durante la suspensión.

03 Apr 2024, 17:24

Type Values Removed Values Added
New CVE
Information

Published : 2024-04-03 17:15

Updated : 2024-11-04 18:35

NVD link : CVE-2024-26758

Mitre link : CVE-2024-26758

CVE.ORG link : CVE-2024-26758

JSON object : View

Products Affected

No product.

CWE
CWE-129

Improper Validation of Array Index