git: aaac643676bc - stable/13 - vm_page_grab_valid(): clear *mp in case of pager denying page allocation

The branch stable/13 has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=aaac643676bce2c80a78069e2c4a45deb50448dc

commit aaac643676bce2c80a78069e2c4a45deb50448dc
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2022-12-17 00:12:14 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2023-01-20 03:19:35 +0000

    vm_page_grab_valid(): clear *mp in case of pager denying page allocation
    
    Tested by:      pho
    
    (cherry picked from commit 3249449190c2c71ecfc4fa5f518f94ff552df440)
---
 sys/vm/vm_page.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sys/vm/vm_page.c b/sys/vm/vm_page.c
index 736b25a1f2b5..ecabd6c4798e 100644
--- a/sys/vm/vm_page.c
+++ b/sys/vm/vm_page.c
@@ -4678,8 +4678,10 @@ retrylookup:
 		*mp = NULL;
 		return (VM_PAGER_FAIL);
 	} else if ((m = vm_page_alloc(object, pindex, pflags)) == NULL) {
-		if (!vm_pager_can_alloc_page(object, pindex))
+		if (!vm_pager_can_alloc_page(object, pindex)) {
+			*mp = NULL;
 			return (VM_PAGER_AGAIN);
+		}
 		goto retrylookup;
 	}