https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=199676
--- Comment #1 from commit-h...@freebsd.org ---
A commit references this bug:
Author: adrian
Date: Sun May 3 22:28:43 UTC 2015
New revision: 282372
URL: https://svnweb.freebsd.org/changeset/base/282372
Log:
Remove old iv_bss entry from the node table
This may happen on RUN - SCAN - RUN - SCAN state transition:
1. RUN - SCAN: in ieee80211_sta_join1(): iv_bss will be moved to obss,
refcnt will be reduced by 2 (default minimum).
Now, if old iv_bss have some extra references (for example, from
unacknowledged probe responses), it will not be freed and will stay
in the node table.
2. SCAN - RUN.
3. If old iv_bss will not be deleted by the time when the next RUN - SCAN
state transition occurs, then sta_leave() will reduce it's reference
counter once more. As a result, two last users will free it - this will
lead to kernel panic.
In this patch old iv_bss entry is explicitly removed from the node table in
ieee80211_sta_join1() (as a result, it will not be processed by sta_leave()).
PR:kern/199676
Differential Revision:Andriy Voskoboinyk s3er...@gmail.com
Changes:
head/sys/net80211/ieee80211_node.c
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