diff mbox series

[2/2] Bluetooth: 6LoWPAN: Add missing check for skb_clone

Message ID 20230320063156.31047-2-jiasheng@iscas.ac.cn (mailing list archive)
State Awaiting Upstream
Delegated to: Netdev Maintainers
Headers show
Series [1/2] Bluetooth: 6LoWPAN: Modify the error handling in the loop | expand

Checks

Context Check Description
netdev/series_format warning Single patches do not need cover letters; Target tree name not specified in the subject
netdev/tree_selection success Guessed tree name to be net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 18 this patch: 18
netdev/cc_maintainers fail 1 blamed authors not CCed: jukka.rissanen@linux.intel.com; 1 maintainers not CCed: jukka.rissanen@linux.intel.com
netdev/build_clang success Errors and warnings before: 18 this patch: 18
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success Fixes tag looks correct
netdev/build_allmodconfig_warn success Errors and warnings before: 18 this patch: 18
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 10 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Jiasheng Jiang March 20, 2023, 6:31 a.m. UTC 
Add the check for the return value of skb_clone since it may return NULL
pointer and cause NULL pointer dereference in send_pkt.

Fixes: 18722c247023 ("Bluetooth: Enable 6LoWPAN support for BT LE devices")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
---
 net/bluetooth/6lowpan.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c
index bd6dbca5747f..3d4ef94405f8 100644
--- a/net/bluetooth/6lowpan.c
+++ b/net/bluetooth/6lowpan.c
@@ -475,6 +475,10 @@  static int send_mcast_pkt(struct sk_buff *skb, struct net_device *netdev)
 
 		list_for_each_entry_rcu(pentry, &dev->peers, list) {
 			local_skb = skb_clone(skb, GFP_ATOMIC);
+			if (!local_skb) {
+				err = -ENOMEM;
+				goto out;
+			}
 
 			BT_DBG("xmit %s to %pMR type %u IP %pI6c chan %p",
 			       netdev->name,