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authorKrzysztof Kozlowski <krzysztof.kozlowski@canonical.com>2021-12-09 11:13:07 +0300
committerJakub Kicinski <kuba@kernel.org>2021-12-09 18:50:32 +0300
commit4cd8371a234d051f9c9557fcbb1f8c523b1c0d10 (patch)
treeb68402a21e402fd2405ea0a85ed9534441422047 /net/nfc
parentfd79a0cbf0b2e34bcc45b13acf962e2032a82203 (diff)
downloadlinux-4cd8371a234d051f9c9557fcbb1f8c523b1c0d10.tar.xz
nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done
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") Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Link: https://lore.kernel.org/r/20211209081307.57337-1-krzysztof.kozlowski@canonical.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/nfc')
-rw-r--r--net/nfc/netlink.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 0b4fae183a4b..f184b0db79d4 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -1394,8 +1394,10 @@ 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;
}