GSD-2023-1000932 dm thin: Fix UAF in run_timer_softirq()

dm thin: Fix UAF in runtimersoftirq This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.15.87 by commit 34cd15d83b7206188d440b29b68084fcafde9395,...