X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Flzx_decompress.c;h=fe5bdbad02240a1f1ec21e3516fd9424f34bec5d;hp=dba27665eb278b1361a60f56998fb41ead8a1d45;hb=abd8714418efc184deb7bc20172025cc1672b763;hpb=f18b7fc3361c4daac0ddd104af65a8eff8466fec

diff --git a/src/lzx_decompress.c b/src/lzx_decompress.c
index dba27665..fe5bdbad 100644
--- a/src/lzx_decompress.c
+++ b/src/lzx_decompress.c
@@ -228,6 +228,8 @@ lzx_read_codeword_lens(struct input_bitstream *istream, u8 *lens, unsigned num_l
 				run_len = 4 + bitstream_read_bits(istream, 1);
 				presym = read_huffsym_using_precode(istream,
 								    precode_decode_table);
+				if (unlikely(presym > 17))
+					return -1;
 				len = *len_ptr - presym;
 				if ((s8)len < 0)
 					len += 17;