Use scoped_with_init_fs() to temporarily override current->fs for
the filp_open() call in __core_scsi3_write_aptpl_to_file() so the
path lookup happens in init's filesystem context.

__core_scsi3_write_aptpl_to_file() ← core_scsi3_update_and_write_aptpl()
← PR command handlers ← target_queued_submit_work() ← kworker

Signed-off-by: Christian Brauner <brauner@kernel.org>
---
 drivers/target/target_core_pr.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c
index f88e63aefcd8..2a030f119b24 100644
--- a/drivers/target/target_core_pr.c
+++ b/drivers/target/target_core_pr.c
@@ -18,6 +18,7 @@
 #include <linux/file.h>
 #include <linux/fcntl.h>
 #include <linux/fs.h>
+#include <linux/fs_struct.h>
 #include <scsi/scsi_proto.h>
 #include <linux/unaligned.h>
 
@@ -1969,7 +1970,8 @@ static int __core_scsi3_write_aptpl_to_file(
 	if (!path)
 		return -ENOMEM;
 
-	file = filp_open(path, flags, 0600);
+	scoped_with_init_fs()
+		file = filp_open(path, flags, 0600);
 	if (IS_ERR(file)) {
 		pr_err("filp_open(%s) for APTPL metadata"
 			" failed\n", path);

-- 
2.47.3