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2023-12-09 95099d4622f8cb224d94e314c7a8e0df60b13f87

 kernel/net/ipv6/exthdrs_core.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * IPv6 library code, needed by static components when full IPv6 support is
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  * not configured or static.
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@@ -196,10 +197,8 @@
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 		struct ipv6hdr _ip6, *ip6;
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 		ip6 = skb_header_pointer(skb, *offset, sizeof(_ip6), &_ip6);
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-		if (!ip6 || (ip6->version != 6)) {
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-			printk(KERN_ERR "IPv6 header not found\n");
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+		if (!ip6 || (ip6->version != 6))
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 			return -EBADMSG;
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-		}
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 		start = *offset + sizeof(struct ipv6hdr);
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 		nexthdr = ip6->nexthdr;
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 	}
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@@ -265,7 +264,7 @@
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 		} else if (nexthdr == NEXTHDR_AUTH) {
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 			if (flags && (*flags & IP6_FH_F_AUTH) && (target < 0))
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 				break;
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-			hdrlen = (hp->hdrlen + 2) << 2;
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+			hdrlen = ipv6_authlen(hp);
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 		} else
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 			hdrlen = ipv6_optlen(hp);
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