CVE ID:	CVE-2024-35793
Description:	In the Linux kernel, the following vulnerability has been resolved: debugfs: fix wait/cancellation handling during remove Ben Greear further reports deadlocks during concurrent debugfs remove while files are being accessed, even though the code in question now uses debugfs cancellations. Turns out that despite all the review on the locking, we missed completely that the logic is wrong: if the refcount hits zero we can finish (and need not wait for the completion), but if it doesn't we have to trigger all the cancellations. As written, we can _never_ get into the loop triggering the cancellations. Fix this, and explain it better while at it.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2024-35793 https://git.kernel.org/stable/c/3d08cca5fd0aabb62b7015067ab40913b33da906 https://git.kernel.org/stable/c/3d08cca5fd0aabb62b7015067ab40913b33da906 https://git.kernel.org/stable/c/952c3fce297f12c7ff59380adb66b564e2bc9b64 https://git.kernel.org/stable/c/952c3fce297f12c7ff59380adb66b564e2bc9b64 https://git.kernel.org/stable/c/e88b5ae01901c4a655a53158397746334778a57b https://git.kernel.org/stable/c/e88b5ae01901c4a655a53158397746334778a57b