CVE-2024-26775

In the Linux kernel, the following vulnerability has been resolved: aoe: avoid potential deadlock at set_capacity Move set_capacity() outside of the section procected by (&d-;>lock). To avoid possible interrupt unsafe locking scenario: CPU0 CPU1 -— ---- [1] lock(&bdev-;>bd_size_lock); local_irq_disable(); [2] lock(&d-;>lock); [3] lock(&bdev-;>bd_size_lock); [4] lock(&d-;>lock); *** DEADLOCK*** Where 1 hold by zram_add()->set_capacity(). [2]lock(&d-;>lock) hold by aoeblk_gdalloc(). And aoeblk_gdalloc() is trying to acquire 3 at set_capacity() call. In this situation an attempt to acquire [4]lock(&d-;>lock) from aoecmd_cfg_rsp() will lead to deadlock. So the simplest solution is breaking lock dependency 2 -> 3 by moving set_capacity() outside.