Wireshark-bugs: [Wireshark-bugs] [Bug 12440] Buildbot crash output: fuzz-2016-05-14-24004.pcap
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Sat, 14 May 2016 07:52:21 +0000

Comment # 1 on bug 12440 from 
Somewhat-close-to-tip-of-2.0-branch on OS X:

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x0000000000000000

    ...

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libwireshark.6.dylib              0x000000010cccf0ee dissect_eth + 238
(packet-eth.c:841)
1   libwireshark.6.dylib              0x000000010ca051b2 call_dissector_work +
258 (packet.c:618)
2   libwireshark.6.dylib              0x000000010ca052d3 dissector_try_uint +
99 (packet.c:1164)
3   libwireshark.6.dylib              0x000000010ca051e6 call_dissector_work +
310 (packet.c:621)
4   libwireshark.6.dylib              0x000000010ca04762
call_dissector_with_data + 50 (packet.c:2564)
5   libwireshark.6.dylib              0x000000010d1e75ba dissect_user + 458
(packet-user_encap.c:173)
6   libwireshark.6.dylib              0x000000010ca051e6 call_dissector_work +
310 (packet.c:621)
7   libwireshark.6.dylib              0x000000010ca05075 dissector_try_uint_new
+ 101 (packet.c:1164)
8   libwireshark.6.dylib              0x000000010ccfd943 dissect_frame + 3459
(packet-frame.c:499)
9   libwireshark.6.dylib              0x000000010ca051b2 call_dissector_work +
258 (packet.c:618)
10  libwireshark.6.dylib              0x000000010ca04762
call_dissector_with_data + 50 (packet.c:2564)
11  libwireshark.6.dylib              0x000000010ca04648 dissect_record + 568
(packet.c:500)
12  libwireshark.6.dylib              0x000000010c9f82d4
epan_dissect_run_with_taps + 68 (epan.c:346)
13  tshark                            0x000000010c8b1a48 process_packet + 376
(tshark.c:3744)
14  tshark                            0x000000010c8af35c main + 11532
(tshark.c:3497)
15  libdyld.dylib                     0x00007fff93c575ad start + 1

That's

        dissect_eth_common(tvb, pinfo, tree, eth_assume_fcs ? 4 :
eth->fcs_len);


and eth is probably null.

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