[PATCH] nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done
Krzysztof Kozlowski <[email protected]>
| Newsgroups | dev.linux.lists.oe-linux-nfc,org.01.lists.linux-nfc,org.kernel.vger.linux-kernel,org.kernel.vger.netdev,org.kernel.vger.stable |
|---|---|
| Message-ID | <[email protected]> |
The done() netlink callback nfc_genl_dump_ses_done() should check if
received argument is non-NULL, because its allocation could fail earlier
in dumpit() (nfc_genl_dump_ses()).
Fixes: ac22ac466a65 ("NFC: Add a GET_SE netlink API")
Cc: <[email protected]>
Signed-off-by: Krzysztof Kozlowski <[email protected]>
---
net/nfc/netlink.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 334f63c9529e..5c706ed75b33 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -1392,8 +1392,10 @@ static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
{
struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
- nfc_device_iter_exit(iter);
- kfree(iter);
+ if (iter) {
+ nfc_device_iter_exit(iter);
+ kfree(iter);
+ }
return 0;
}
--
2.32.0