{"id":"DEBIAN-CVE-2022-49371","details":"In the Linux kernel, the following vulnerability has been resolved:  driver core: fix deadlock in __device_attach  In __device_attach function, The lock holding logic is as follows: ... __device_attach device_lock(dev)      // get lock dev   async_schedule_dev(__device_attach_async_helper, dev); // func     async_schedule_node       async_schedule_node_domain(func)         entry = kzalloc(sizeof(struct async_entry), GFP_ATOMIC); \t/* when fail or work limit, sync to execute func, but \t   __device_attach_async_helper will get lock dev as \t   well, which will lead to A-A deadlock.  */ \tif (!entry || atomic_read(&entry_count) \u003e MAX_WORK) { \t  func; \telse \t  queue_work_node(node, system_unbound_wq, &entry-\u003ework)   device_unlock(dev)  As shown above, when it is allowed to do async probes, because of out of memory or work limit, async work is not allowed, to do sync execute instead. it will lead to A-A deadlock because of __device_attach_async_helper getting lock dev.  To fix the deadlock, move the async_schedule_dev outside device_lock, as we can see, in async_schedule_node_domain, the parameter of queue_work_node is system_unbound_wq, so it can accept concurrent operations. which will also not change the code logic, and will not lead to deadlock.","modified":"2026-09-01T16:05:30.677907431Z","published":"2025-02-26T07:01:13.777Z","upstream":["CVE-2022-49371"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-49371"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.18.5-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49371.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.18.5-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49371.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.18.5-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49371.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}