CVE-2023-52774

s390/dasd: protect device queue against concurrent access

Description

In the Linux kernel, the following vulnerability has been resolved: s390/dasd: protect device queue against concurrent access In dasd_profile_start() the amount of requests on the device queue are counted. The access to the device queue is unprotected against concurrent access. With a lot of parallel I/O, especially with alias devices enabled, the device queue can change while dasd_profile_start() is accessing the queue. In the worst case this leads to a kernel panic due to incorrect pointer accesses. Fix this by taking the device lock before accessing the queue and counting the requests. Additionally the check for a valid profile data pointer can be done earlier to avoid unnecessary locking in a hot path.

N/A

CVSS

Severity:

EPSS 0.14%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/ebdc569a07a3e8dbe66b4184922ad6f88ac0b96f
https://git.kernel.org/stable/c/f75617cc8df4155374132f0b500b0b3ebb967458
https://git.kernel.org/stable/c/f1ac7789406e2ca9ac51c41ad2daa597f47bdd4d
https://git.kernel.org/stable/c/c841de6247e94e07566d57163d3c0d8b29278f7a
https://git.kernel.org/stable/c/6062c527d0403cef27c54b91ac8390c3a497b250
https://git.kernel.org/stable/c/dc96fde8fcb2b896fd6c64802a7f4ece2e69b0be
https://git.kernel.org/stable/c/9372aab5d0ff621ea203c8c603e7e5f75e888240
https://git.kernel.org/stable/c/db46cd1e0426f52999d50fa72cfa97fa39952885

Frequently Asked Questions

What is the severity of CVE-2023-52774?: CVE-2023-52774 has not yet been assigned a CVSS score.
How to fix CVE-2023-52774?: To fix CVE-2023-52774, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-52774 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2023-52774 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-52774?: CVE-2023-52774 affects Linux Linux, Linux Linux.

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