From: Namjae Jeon <linkinjeon@xxxxxxxxxx>
[ Upstream commit 658609d9a618d8881bf549b5893c0ba8fcff4526 ]
opinfo_put() could be called twice on error of smb21_lease_break_ack().
It will cause UAF issue if opinfo is referenced on other places.
Signed-off-by: Namjae Jeon <linkinjeon@xxxxxxxxxx>
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
fs/smb/server/smb2pdu.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c
index 683152007566c..f81e19e92c207 100644
--- a/fs/smb/server/smb2pdu.c
+++ b/fs/smb/server/smb2pdu.c
@@ -8272,6 +8272,11 @@ static void smb21_lease_break_ack(struct ksmbd_work *work)
le32_to_cpu(req->LeaseState));
}
+ if (ret < 0) {
+ rsp->hdr.Status = err;
+ goto err_out;
+ }
+
lease_state = lease->state;
opinfo->op_state = OPLOCK_STATE_NONE;
wake_up_interruptible_all(&opinfo->oplock_q);
@@ -8279,11 +8284,6 @@ static void smb21_lease_break_ack(struct ksmbd_work *work)
wake_up_interruptible_all(&opinfo->oplock_brk);
opinfo_put(opinfo);
- if (ret < 0) {
- rsp->hdr.Status = err;
- goto err_out;
- }
-
rsp->StructureSize = cpu_to_le16(36);
rsp->Reserved = 0;
rsp->Flags = 0;
--
2.43.0
