leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

NFC: st21nfca: fix double free

Browse Source 
The variable nfcid_skb is not changed in the callee nfc_hci_get_param()
if error occurs. Consequently, the freed variable nfcid_skb will be
freed again, resulting in a double free bug. Set nfcid_skb to NULL after
releasing it to fix the bug.

Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pan Bian 2019-11-07 09:33:20 +08:00 committed by David S. Miller
parent 648db0514a
commit 99a8efbb6e
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/nfc/st21nfca/core.c
View File

@ -708,6 +708,7 @@ static int st21nfca_hci_complete_target_discovered(struct nfc_hci_dev *hdev,
NFC_PROTO_FELICA_MASK;
} else {
kfree_skb(nfcid_skb);
nfcid_skb = NULL;
/* P2P in type A */
r = nfc_hci_get_param(hdev, ST21NFCA_RF_READER_F_GATE,
ST21NFCA_RF_READER_F_NFCID1,