CVE-2023-52774

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.

• linux linux kernel (>= 3.1 < 4.14.332) • linux linux kernel (>= 4.15 < 4.19.301) • linux linux kernel (>= 4.20 < 5.4.263) • linux linux kernel (>= 5.5 < 5.10.203) • linux linux kernel (>= 5.11 < 5.15.141) • linux linux kernel (>= 5.16 < 6.1.65) • linux linux kernel (>= 6.2 < 6.6.4) • linux linux kernel 6.7