---
- branch: netbsd-8
  date: Fri Nov 17 20:24:05 UTC 2017
  files:
  - new: 1.18.6.2
    old: 1.18.6.1
    path: src/sys/net/if_llatbl.c
    pathrev: src/sys/net/if_llatbl.c@1.18.6.2
    type: modified
  - new: 1.10.8.2
    old: 1.10.8.1
    path: src/sys/net/if_llatbl.h
    pathrev: src/sys/net/if_llatbl.h@1.10.8.2
    type: modified
  - new: 1.250.2.3
    old: 1.250.2.2
    path: src/sys/netinet/if_arp.c
    pathrev: src/sys/netinet/if_arp.c@1.250.2.3
    type: modified
  - new: 1.203.2.2
    old: 1.203.2.1
    path: src/sys/netinet/in.c
    pathrev: src/sys/netinet/in.c@1.203.2.2
    type: modified
  - new: 1.245.2.2
    old: 1.245.2.1
    path: src/sys/netinet6/in6.c
    pathrev: src/sys/netinet6/in6.c@1.245.2.2
    type: modified
  - new: 1.232.2.3
    old: 1.232.2.2
    path: src/sys/netinet6/nd6.c
    pathrev: src/sys/netinet6/nd6.c@1.232.2.3
    type: modified
  id: 20171117T202405Z.336f147f22f8d1a03375712709c1b519e486e98c
  log: "Pull up following revision(s) (requested by ozaki-r in ticket #353):\n\tsys/net/if_llatbl.c:
    1.22\n\tsys/net/if_llatbl.h: 1.13\n\tsys/netinet/if_arp.c: 1.254\n\tsys/netinet/in.c:
    1.208-1.209\n\tsys/netinet6/in6.c: 1.249-1.250\n\tsys/netinet6/nd6.c: 1.237\nRemove
    redundant KASSERTMSG\nThe function is static, has just one caller and the caller
    does the same check.\n--\nFix a deadlock between a route update and lltable\nIt
    happens because rtalloc1 is called from lltable with holding\nIF_AFDATA_WLOCK.\nIf
    a route update is in action, rtalloc1 would wait for its completion with\nholding
    IF_AFDATA_WLOCK. At the same moment, a softint (e.g., arpintr) may try\nto take
    IF_AFDATA_WLOCK and get stuck on it. Unfortunately the stuck softint\nprevents
    the route update from progressing because the route update calls\npsref_target_destroy
    that needs the softint to complete.\nA resource allocation graph of the senario
    looks like this:\n    route update =(psref_target_destroy)=> softint => IF_AFDATA_WLOCK\n
    \   =(rt_update_wait)=> route update\nFix the deadlock by pulling rtalloc1 out
    of the lltable codes inside\nIF_AFDATA_WLOCK.\nNote that the deadlock happens
    only if NET_MPSAFE is enabled.\n"
  module: src
  subject: 'CVS commit: [netbsd-8] src/sys'
  unixtime: '1510950245'
  user: snj