git: b339a4a042f9 - stable/15 - spibus: Don't leak KVA when freeing a mmap region

The branch stable/15 has been updated by jhb:

URL: https://cgit.FreeBSD.org/src/commit/?id=b339a4a042f97cb5bb334f5551703cc5a475af18

commit b339a4a042f97cb5bb334f5551703cc5a475af18
Author:     John Baldwin <jhb@FreeBSD.org>
AuthorDate: 2026-02-06 15:30:26 +0000
Commit:     John Baldwin <jhb@FreeBSD.org>
CommitDate: 2026-04-24 15:32:19 +0000

    spibus: Don't leak KVA when freeing a mmap region
    
    Effort:         CHERI upstreaming
    Sponsored by:   AFRL, DARPA
    Differential Revision:  https://reviews.freebsd.org/D54837
    
    (cherry picked from commit 06fd19b5349a1ff27ef338619fdade596986fc2f)
---
 sys/dev/spibus/spigen.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sys/dev/spibus/spigen.c b/sys/dev/spibus/spigen.c
index 66c93e927281..39b94c6123fc 100644
--- a/sys/dev/spibus/spigen.c
+++ b/sys/dev/spibus/spigen.c
@@ -283,8 +283,10 @@ spigen_mmap_cleanup(void *arg)
 {
 	struct spigen_mmap *mmap = arg;
 
-	if (mmap->kvaddr != 0)
+	if (mmap->kvaddr != 0) {
 		pmap_qremove(mmap->kvaddr, mmap->bufsize / PAGE_SIZE);
+		kva_free(mmap->kvaddr, mmap->bufsize);
+	}
 	if (mmap->bufobj != NULL)
 		vm_object_deallocate(mmap->bufobj);
 	free(mmap, M_DEVBUF);