Merge pull request #13713 from miri64/gnrc_sixlowpan_iphc/bug/encode-zero-header

gnrc_sixlowpan_iphc: zero IPv6 header before decompressing into it
2020-03-25 16:43:17 +01:00 · 2020-03-25 16:43:17 +01:00 · 53790d1269
commit 53790d1269
parent 4c59e93a35 ac222521ab
1 changed files with 3 additions and 0 deletions
--- a/sys/net/gnrc/network_layer/sixlowpan/iphc/gnrc_sixlowpan_iphc.c
+++ b/sys/net/gnrc/network_layer/sixlowpan/iphc/gnrc_sixlowpan_iphc.c
@ -158,6 +158,9 @@ static size_t _iphc_ipv6_decode(const uint8_t *iphc_hdr,
        payload_offset++;
    }

+    /* bits of the uncompressed address might not be written in decompression,
+     * so zero the whole header first */
+    memset(ipv6_hdr, 0, sizeof(*ipv6_hdr));
    ipv6_hdr_set_version(ipv6_hdr);

    switch (iphc_hdr[IPHC1_IDX] & SIXLOWPAN_IPHC1_TF) {