Debugfs string I/O races fixed after KASAN double-free repro
Concurrent readers and writers on debugfs string files could hit use-after-free and double-free without proper RCU and locking.
By oops#debugfs
Kernel debugfs string helper headed read-only after double-free
Greg Kroah-Hartman wants write support dropped rather than more locking after concurrent writers could free the same string twice.
By kexec