diff options
| author | Michael Mann <mmann78@netscape.net> | 2015-11-30 21:52:35 -0500 |
|---|---|---|
| committer | Michael Mann <mmann78@netscape.net> | 2015-12-01 04:15:21 +0000 |
| commit | 858c3f0079f987833fb22eba2c361d1a88ba4103 (patch) | |
| tree | 70f29fdebb487e7b8dfa1ff9638bf0c28f4e5b56 /epan/dissectors/packet-s7comm_szl_ids.c | |
| parent | 212f2f1761e56d9177f4282292d9281e8bb225bb (diff) | |
[S7COMM] Prevent divide by zero.
Bug: 11823
Change-Id: I4437efb3dc9532e3d29aacd36736d6f7b3ed38a2
Reviewed-on: https://code.wireshark.org/review/12322
Reviewed-by: Michael Mann <mmann78@netscape.net>
Diffstat (limited to 'epan/dissectors/packet-s7comm_szl_ids.c')
| -rw-r--r-- | epan/dissectors/packet-s7comm_szl_ids.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/epan/dissectors/packet-s7comm_szl_ids.c b/epan/dissectors/packet-s7comm_szl_ids.c index 34e9376deb..7d914f565a 100644 --- a/epan/dissectors/packet-s7comm_szl_ids.c +++ b/epan/dissectors/packet-s7comm_szl_ids.c @@ -4010,11 +4010,13 @@ s7comm_decode_ud_cpu_szl_subfunc(tvbuff_t *tvb, * it's not possible to decode this and following telegrams without knowing the previous requests. */ tbytes = 0; - if ((list_count * list_len) > (len - 8)) { - list_count = (len - 8) / list_len; - /* remind the number of trailing bytes */ - if (list_count > 0) { - tbytes = (len - 8) % list_count; + if (list_len > 0) { + if ((list_count * list_len) > (len - 8)) { + list_count = (len - 8) / list_len; + /* remind the number of trailing bytes */ + if (list_count > 0) { + tbytes = (len - 8) % list_count; + } } } offset += 2; |