[PATCH 4.14 25/37] Bluetooth: Fix passing NULL to PTR_ERR

Greg Kroah-Hartman
2022-07-27T16:27:22Z

From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

commit 266191aa8d14b84958aaeb5e96ee4e97839e3d87 upstream.

Passing NULL to PTR_ERR will result in 0 (success), also since the likes of
bt_skb_sendmsg does never return NULL it is safe to replace the instances of
IS_ERR_OR_NULL with IS_ERR when checking its return.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Tested-by: Tedd Ho-Jeong An <tedd.an@intel.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Cc: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
include/net/bluetooth/bluetooth.h | 2 +-
net/bluetooth/rfcomm/sock.c | 2 +-
net/bluetooth/sco.c | 2 +-
3 files changed, 3 insertions(+), 3 deletions(-)

--- a/include/net/bluetooth/bluetooth.h
+++ b/include/net/bluetooth/bluetooth.h
@@ -419,7 +419,7 @@ static inline struct sk_buff *bt_skb_sen
struct sk_buff *tmp;

tmp = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom);
- if (IS_ERR_OR_NULL(tmp)) {
+ if (IS_ERR(tmp)) {
kfree_skb(skb);
return tmp;
}
--- a/net/bluetooth/rfcomm/sock.c
+++ b/net/bluetooth/rfcomm/sock.c
@@ -586,7 +586,7 @@ static int rfcomm_sock_sendmsg(struct so

skb = bt_skb_sendmmsg(sk, msg, len, d->mtu, RFCOMM_SKB_HEAD_RESERVE,
RFCOMM_SKB_TAIL_RESERVE);
- if (IS_ERR_OR_NULL(skb))
+ if (IS_ERR(skb))
return PTR_ERR(skb);

sent = rfcomm_dlc_send(d, skb);
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -721,7 +721,7 @@ static int sco_sock_sendmsg(struct socke
return -EOPNOTSUPP;

skb = bt_skb_sendmsg(sk, msg, len, len, 0, 0);
- if (IS_ERR_OR_NULL(skb))
+ if (IS_ERR(skb))
return PTR_ERR(skb);

lock_sock(sk);