CVE-2026-64238

In the Linux kernel, the following vulnerability has been resolved:

gpio: shared: fix deadlock on shared proxy's parent removal

Commit 710abda58055 ("gpio: shared: call gpio_chip::of_xlate() if set")

used the mutex embedded in struct gpio_shared_entry to protect the

offset field which now can be modified after assignment. The critical

section however is too wide and introduced a potential deadlock on the

removal of the shared GPIO proxy's parent.

Make the critical section shorter - only protect the offset when it's

being read.

While at it: mention the fact that the entry lock is now also used to

protect against concurrent access to the offset field in the structure's

documentation.