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authorpaul <paul>2003-01-17 23:48:42 +0000
committerpaul <paul>2003-01-17 23:48:42 +0000
commit2d59836a4fb16e2471560a47da7e5f75779c5807 (patch)
tree619901a67086c8eca741eee4e8b6b9810a3d86b9 /doc/quagga.texi
parente04ab74d17b4f3456bd3eeefe2043584431b4ea2 (diff)
From endo@suri.co.jp Fri Jan 17 23:36:30 2003
Date: Fri, 20 Dec 2002 17:58:43 +0900 From: Masahiko Endo <endo@suri.co.jp> Reply-To: zebra@zebra.org To: zebra@zebra.org Cc: kunihiro@zebra.org Subject: [zebra 16824] [PATCH] nsm_kill_neighbor [ The following text is in the "ISO-2022-JP" character set. ] [ Your display is set for the "ISO-8859-1" character set. ] [ Some characters may be displayed incorrectly. ] Hi Ishiguro-san, Here is my problem analysis against the case that the ospfd crashes when an interface is brought down. When the ospfd receives a ZEBRA message "ZEBRA_INTERFACE_DOWN" from zebra daemon, the ospfd performs bunch of ospf-interface cleanup for the notified zebra-interface. There are cases that neighbor instance "nbr", which will be removed afterward, may scheduled in the NSM thread event queue. And when the NSM event thread is fired, dereference for this already freed "nbr" pointer causes SIGSEGV. Please take a look at following timeline of processing sequences.
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