CVE-2023-53848
N/A
Summary
In the Linux kernel, the following vulnerability has been resolved:
md/raid5-cache: fix a deadlock in r5l_exit_log()
Commit b13015af94cf ("md/raid5-cache: Clear conf->log after finishing work") introduce a new problem:
// caller hold reconfig_mutex r5l_exit_log flush_work(&log->disable_writeback_work) r5c_disable_writeback_async wait_event /* * conf->log is not NULL, and mddev_trylock() * will fail, wait_event() can never pass. */ conf->log = NULL
Fix this problem by setting 'config->log' to NULL before wake_up() as it used to be, so that wait_event() from r5c_disable_writeback_async() can exist. In the meantime, move forward md_unregister_thread() so that null-ptr-deref this commit fixed can still be fixed.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | b13015af94cf405f73ff64ce0797269554020c37 < ac9e103f282a7854f3274ef5ff0742fbbe8d7d6b | affected |
| Linux | Linux | b13015af94cf405f73ff64ce0797269554020c37 < 71cf23271f015a57038bdc4669952096f9fe5500 | affected |
| Linux | Linux | b13015af94cf405f73ff64ce0797269554020c37 < c406984738215dc20ac2dc63e49d70f20797730e | affected |
| Linux | Linux | b13015af94cf405f73ff64ce0797269554020c37 < a705b11b358dee677aad80630e7608b2d5f56691 | affected |
| Linux | Linux | 6.0 | affected |
| Linux | Linux | 0 < 6.0 | unaffected |
| Linux | Linux | 6.1.53 <= 6.1.* | unaffected |
| Linux | Linux | 6.4.16 <= 6.4.* | unaffected |
| Linux | Linux | 6.5.3 <= 6.5.* | unaffected |
| Linux | Linux | 6.6 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/ac9e103f282a7854f3274ef5ff0742fbbe8d7d6b
- https://git.kernel.org/stable/c/71cf23271f015a57038bdc4669952096f9fe5500
- https://git.kernel.org/stable/c/c406984738215dc20ac2dc63e49d70f20797730e
- https://git.kernel.org/stable/c/a705b11b358dee677aad80630e7608b2d5f56691
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