kern/136943: [lor] wpi0_com_lock / wpi0
Rene Ladan
rene at freebsd.org
Mon Jul 20 22:00:18 UTC 2009
The following reply was made to PR kern/136943; it has been noted by GNATS.
From: Rene Ladan <rene at freebsd.org>
To: bug-followup at FreeBSD.org
Cc: bzeeb+freebsd+lor at zabbadoz.net
Subject: Re: kern/136943: [lor] wpi0_com_lock / wpi0
Date: Mon, 20 Jul 2009 23:31:57 +0200
The same LOR with a different backtrace:
lock order reversal:
1st 0xffffff80002dc018 wpi0_com_lock (wpi0_com_lock) @
/usr/src/sys/modules/wpi/../../dev/wpi/if_wpi.c:1291
2nd 0xffffff00024c0010 wpi0 (network driver) @
/usr/src/sys/modules/wpi/../../dev/wpi/if_wpi.c:2068
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
_witness_debugger() at _witness_debugger+0x2e
witness_checkorder() at witness_checkorder+0x81e
_mtx_lock_flags() at _mtx_lock_flags+0x78
wpi_raw_xmit() at wpi_raw_xmit+0x7a
ieee80211_send_mgmt() at ieee80211_send_mgmt+0x4d5
sta_newstate() at sta_newstate+0x42e
wpi_newstate() at wpi_newstate+0xee
ieee80211_newstate_cb() at ieee80211_newstate_cb+0xac
taskqueue_run() at taskqueue_run+0x96
taskqueue_thread_loop() at taskqueue_thread_loop+0x3f
fork_exit() at fork_exit+0x12a
fork_trampoline() at fork_trampoline+0xe
--- trap 0, rip = 0, rsp = 0xffffff803c22bd30, rbp = 0 ---
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