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CVE-2024-35808

Disclosure Date: May 17, 2024
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Description

In the Linux kernel, the following vulnerability has been resolved:

md/dm-raid: don’t call md_reap_sync_thread() directly

Currently md_reap_sync_thread() is called from raid_message() directly
without holding ‘reconfig_mutex’, this is definitely unsafe because
md_reap_sync_thread() can change many fields that is protected by
‘reconfig_mutex’.

However, hold ‘reconfig_mutex’ here is still problematic because this
will cause deadlock, for example, commit 130443d60b1b (“md: refactor
idle/frozen_sync_thread() to fix deadlock”).

Fix this problem by using stop_sync_thread() to unregister sync_thread,
like md/raid did.

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General Information

Vendors

  • Linux

Products

  • Linux

Additional Info

Technical Analysis