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: ac22ac466a
("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
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@ -1400,8 +1400,10 @@ static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
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{
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struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
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nfc_device_iter_exit(iter);
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kfree(iter);
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if (iter) {
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nfc_device_iter_exit(iter);
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kfree(iter);
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}
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return 0;
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}
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