git: f96c4f45f791 - main - cuse: Assert the server refcount

The branch main has been updated by christos:

URL: https://cgit.FreeBSD.org/src/commit/?id=f96c4f45f791124192363c9aa2898b1d0e4cc6d0

commit f96c4f45f791124192363c9aa2898b1d0e4cc6d0
Author:     Christos Margiolis <christos@FreeBSD.org>
AuthorDate: 2026-09-30 09:51:05 +0000
Commit:     Christos Margiolis <christos@FreeBSD.org>
CommitDate: 2026-09-30 09:51:05 +0000

    cuse: Assert the server refcount
    
    Assert that the refcount does not underflow before decrementing it, and
    that it really is zero by the time the server is freed.
    
    MFC after:      1 week
    Sponsored by:   The FreeBSD Foundation
    Reviewed by:    kib
    Differential Revision:  https://reviews.freebsd.org/D60043
---
 sys/fs/cuse/cuse.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sys/fs/cuse/cuse.c b/sys/fs/cuse/cuse.c
index 081fe1fe0bad..7408478f4ba7 100644
--- a/sys/fs/cuse/cuse.c
+++ b/sys/fs/cuse/cuse.c
@@ -648,6 +648,7 @@ cuse_server_unref(struct cuse_server *pcs)
 	 */
 	cuse_global_lock();
 	cuse_server_lock(pcs);
+	MPASS(pcs->refs > 0);
 	if (--(pcs->refs) != 0) {
 		cuse_server_unlock(pcs);
 		cuse_global_unlock();
@@ -683,6 +684,7 @@ cuse_server_unref(struct cuse_server *pcs)
 
 	mtx_destroy(&pcs->mtx);
 
+	MPASS(pcs->refs == 0);
 	free(pcs, M_CUSE);
 }