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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/net/ipv6/exthdrs_core.c
..
..
@@ -143,6 +143,8 @@
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 			optlen = 1;
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 			break;
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 		default:
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+			if (len < 2)
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+				goto bad;
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 			optlen = nh[offset + 1] + 2;
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 			if (optlen > len)
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 				goto bad;