CVE-2022-48636

In the Linux kernel, the following vulnerability has been resolved: s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup Fix Oops in dasd_alias_get_start_dev() function caused by the pavgroup pointer being NULL. The pavgroup pointer is checked on the entrance of the function but without the lcu->lock being held. Therefore there is a race window between dasd_alias_get_start_dev() and _lcu_update() which sets pavgroup to NULL with the lcu->lock held. Fix by checking the pavgroup pointer with lcu->lock held.

• linux linux kernel (>= 2.6.25 < 4.9.330) • linux linux kernel (>= 4.10 < 4.14.295) • linux linux kernel (>= 4.15 < 4.19.260) • linux linux kernel (>= 4.20 < 5.4.215) • linux linux kernel (>= 5.5 < 5.10.146) • linux linux kernel (>= 5.11 < 5.15.71) • linux linux kernel (>= 5.16 < 5.19.12) • linux linux kernel 6.0