From: Krzysztof Kozlowski krzysztof.kozlowski@canonical.com
commit 4cd8371a234d051f9c9557fcbb1f8c523b1c0d10 upstream.
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@canonic... Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/nfc/netlink.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
--- a/net/nfc/netlink.c +++ b/net/nfc/netlink.c @@ -1392,8 +1392,10 @@ static int nfc_genl_dump_ses_done(struct { 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; }