From: Kent Overstreet <kent.overstreet@linux.dev>
Date: Fri, 3 May 2024 15:39:53 +0000 (-0400)
Subject: bcachefs: Fix early error path in bch2_fs_btree_key_cache_exit()
X-Git-Tag: microblaze-v6.13~1109^2~171
X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=b30b70ad8bffcde513d34d525820ec411f48e3d7;p=linux-2.6-microblaze.git

bcachefs: Fix early error path in bch2_fs_btree_key_cache_exit()

Reported-by: syzbot+a35cdb62ec34d44fb062@syzkaller.appspotmail.com
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---

diff --git a/fs/bcachefs/btree_key_cache.c b/fs/bcachefs/btree_key_cache.c
index e8c1c530cd95..7dafa1accec2 100644
--- a/fs/bcachefs/btree_key_cache.c
+++ b/fs/bcachefs/btree_key_cache.c
@@ -956,13 +956,15 @@ void bch2_fs_btree_key_cache_exit(struct btree_key_cache *bc)
 	}
 
 #ifdef __KERNEL__
-	for_each_possible_cpu(cpu) {
-		struct btree_key_cache_freelist *f =
-			per_cpu_ptr(bc->pcpu_freed, cpu);
-
-		for (i = 0; i < f->nr; i++) {
-			ck = f->objs[i];
-			list_add(&ck->list, &items);
+	if (bc->pcpu_freed) {
+		for_each_possible_cpu(cpu) {
+			struct btree_key_cache_freelist *f =
+				per_cpu_ptr(bc->pcpu_freed, cpu);
+
+			for (i = 0; i < f->nr; i++) {
+				ck = f->objs[i];
+				list_add(&ck->list, &items);
+			}
 		}
 	}
 #endif