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.
Metrics
Affected Vendors & Products
References
History
Wed, 13 Nov 2024 02:45:00 +0000
Type | Values Removed | Values Added |
---|---|---|
First Time appeared |
Redhat
Redhat enterprise Linux |
|
CPEs | cpe:/a:redhat:enterprise_linux:9 cpe:/o:redhat:enterprise_linux:9 |
|
Vendors & Products |
Redhat
Redhat enterprise Linux |
Mon, 04 Nov 2024 18:15:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Weaknesses | CWE-129 | |
Metrics |
cvssV3_1
|
cvssV3_1
|
MITRE
Status: PUBLISHED
Assigner: Linux
Published: 2024-04-03T17:00:42.448Z
Updated: 2024-11-05T09:15:12.841Z
Reserved: 2024-02-19T14:20:24.170Z
Link: CVE-2024-26758
Vulnrichment
Updated: 2024-08-02T00:14:13.281Z
NVD
Status : Awaiting Analysis
Published: 2024-04-03T17:15:52.263
Modified: 2024-11-21T09:03:00.333
Link: CVE-2024-26758
Redhat