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Switch Cored When DHCP Packet Received With Bogus Value In UDP Length Field

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TitleSwitch Cored When DHCP Packet Received With Bogus Value In UDP Length Field
Symptoms
  • Switch rebooted with core file but core file appears incomplete
  • Sometimes no backtrace in core file
  • When backtrace written, appears as follows:
Lifecycle Crash Reporter: Process Name: cbcp-main.x, Thread Name: tMainTask, Signal 11, Slot: 1, PID 1762, LWP: 2067
[bt] Execution path:
[bt] /opt/appfs/lib/cp/libndlcs.so.1(_Z30nd_lcs_crash_exception_handleriP9siginfo_tPv+0x1c8)[0xa46789c]
[bt] linux-vdso32.so.1(__kernel_sigtramp_rt32+0x0)[0x1003d0]
[bt] cbcp-main.x(_ZN6I4Node12ipCircFromIdEi+0x144)[0x10a18a4c]
[bt] cbcp-main.x(_ZN6I4Node11ipTxFromSrcEP11ir_buf_descimmhii+0xd20)[0x10a471c0]
[bt] cbcp-main.x(ipTxFromSrc+0x84)[0x10a15600]
[bt] cbcp-main.x(rcIpIsBootP+0x1480)[0x10bbe860]
[bt] cbcp-main.x(rcIpProcessFrame+0x1224)[0x10ba7cbc]
[bt] cbcp-main.x(rcIpRxFrame+0x2d4)[0x10ba8cdc]
[bt] /opt/appfs/lib/cp/libcpp.so.1(cppProcRxFrame+0x2920)[0xfae90dc]
[bt] /opt/appfs/lib/cp/libcpp.so.1(cppScheduleBody+0x228)[0xfae95a0]
[bt] /opt/appfs/lib/cp/libcpp.so.1(cppMainTask+0x1e4)[0xfaea7e0]

 
Environment
  • VSP 8400
  • VSP 8200
  • VSP 7200
  • VSP 4000
  • Release 7.1.1.0
  • Release 7.1.2.0
Cause
Software defect VOSS-13127
Resolution
  • Issue resolved in 7.1.3 release and above
  • Issue resolved in 8.0.5 release and above
Additional notes

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