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Commit 811a7576 authored by Krzysztof Kozlowski's avatar Krzysztof Kozlowski Committed by Greg Kroah-Hartman
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nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done 



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: ac22ac46 ("NFC: Add a GET_SE netlink API")
Signed-off-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20211209081307.57337-1-krzysztof.kozlowski@canonical.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent c8718026

net/nfc/netlink.c

+4 −2
Original line number Diff line number Diff line
@@ -1400,8 +1400,10 @@ static int nfc_genl_dump_ses_done(struct netlink_callback *cb) 
{

	struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];



	if (iter) {

		nfc_device_iter_exit(iter);

		kfree(iter);

	}



	return 0;

}