Date: Thu, 09 Oct 2025 09:46:27 -0700	[thread overview]
Hello,

syzbot found the following issue on:

HEAD commit:    ec714e371f22 Merge tag 'perf-tools-for-v6.18-1-2025-10-08'..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=174a4b34580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=db9c80a8900dca57
dashboard link: https://syzkaller.appspot.com/bug?extid=665739f456b28f32b23d
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=140e0dcd980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1581452f980000

Test Alexei's fix.

#syz test

--- a/mm/page_owner.c
+++ b/mm/page_owner.c

@@ -168,6 +168,9 @@ static void add_stack_record_to_list(struct stack_record *stack_record,
 	unsigned long flags;
 	struct stack *stack;
 
+	if (!gfpflags_allow_spinning(gfp_mask))
+		return;
+
 	set_current_in_page_owner();
 	stack = kmalloc(sizeof(*stack), gfp_nested_mask(gfp_mask));
 	if (!stack) {
--