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Cisco Bug: CSCum74403 - Voice Gateway may crash due to %ISDN-2-ISDN_EXIT: malloc of PKT failed

Last Modified

Feb 05, 2019

Products (51)

  • Cisco IOS
  • Cisco 886VA-CUBE Integrated Services Router
  • Cisco 881SRSTW Integrated Services Router
  • Cisco 892W Integrated Services Router
  • Cisco 2951 Integrated Services Router
  • Cisco 861W Integrated Services Router
  • Cisco 888W Integrated Services Router
  • Cisco 1905 Serial Integrated Services Router
  • Cisco 881W Integrated Services Router
  • Cisco 881SRST Integrated Services Router
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Known Affected Releases

15.2(3)T 15.2(3)T2

Description (partial)

Crash has been seen on a 3800 series router running 12.4(24)T6 and 3925 series running 15.2(3)T.
After an unspecified period of time (apparently random), the router will crash due to ISDN memory exhaustion.

The crash will look like this in the log of the crashinfo

Nov 26 11:32:31.004:  ISDN-2-ISDN_FATAL  ISDN FATAL ERROR: file ../isdn/lif_common.c, function LIF_GetPkt, message: malloc of PKT failed
Nov 26 11:32:31.006:  ISDN-2-ISDN_EXIT  malloc of PKT failed   
Nov 26 11:32:31.734:  SYS-3-LOGGER_FLUSHED  System was paused for 00:00:00 to ensure console debugging output.

 11:32:31 eastern Tue Nov 26 2013: Unexpected exception to CPU: vector 4, PC = 0x217225

This does not appear to be any specific process as seen with "show process memory" but instead something
inside of isdn itself.
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