CVE-2021-47382 (GCVE-0-2021-47382)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:03 – Updated: 2025-05-04 12:41
VLAI?
Title
s390/qeth: fix deadlock during failing recovery
Summary
In the Linux kernel, the following vulnerability has been resolved: s390/qeth: fix deadlock during failing recovery Commit 0b9902c1fcc5 ("s390/qeth: fix deadlock during recovery") removed taking discipline_mutex inside qeth_do_reset(), fixing potential deadlocks. An error path was missed though, that still takes discipline_mutex and thus has the original deadlock potential. Intermittent deadlocks were seen when a qeth channel path is configured offline, causing a race between qeth_do_reset and ccwgroup_remove. Call qeth_set_offline() directly in the qeth_do_reset() error case and then a new variant of ccwgroup_set_offline(), without taking discipline_mutex.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: b41b554c1ee75070a14c02a88496b1f231c7eacc , < 0bfe741741327822d1482c7edef0184636d08b40 (git)
Affected: b41b554c1ee75070a14c02a88496b1f231c7eacc , < d2b59bd4b06d84a4eadb520b0f71c62fe8ec0a62 (git)
Affected: af0c184ea106051e428b5a0b5f2dfd31cbc54c52 (git)
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    Linux Linux Affected: 5.11
Unaffected: 0 , < 5.11 (semver)
Unaffected: 5.14.10 , ≤ 5.14.* (semver)
Unaffected: 5.15 , ≤ * (original_commit_for_fix)
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