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xtensa: ISS: fix call to split_if_spec
commitbc8d591654
upstream. split_if_spec expects a NULL-pointer as an end marker for the argument list, but tuntap_probe never supplied that terminating NULL. As a result incorrectly formatted interface specification string may cause a crash because of the random memory access. Fix that by adding NULL terminator to the split_if_spec argument list. Cc: stable@vger.kernel.org Fixes:7282bee787
("[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 8") Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -231,7 +231,7 @@ static int tuntap_probe(struct iss_net_private *lp, int index, char *init)
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init += sizeof(TRANSPORT_TUNTAP_NAME) - 1;
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if (*init == ',') {
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rem = split_if_spec(init + 1, &mac_str, &dev_name);
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rem = split_if_spec(init + 1, &mac_str, &dev_name, NULL);
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if (rem != NULL) {
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pr_err("%s: extra garbage on specification : '%s'\n",
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dev->name, rem);
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