Date: Wed, 26 Sep 2012 15:49:57 -0400 From: Kim Culhan <w8hdkim@gmail.com> To: Adrian Chadd <adrian@freebsd.org> Cc: freebsd-wireless@freebsd.org Subject: ath0_node_lock ath0_com_lock lor Message-ID: <CAKZxVQXCejGG8RZOawdcuyGs3ozhueFQD8U7XFkj5qg7Fwjnog@mail.gmail.com>
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Have not seen an lor in some time, this noted today fyi lock order reversal: 1st 0xffffff80009267f0 ath0_node_lock (ath0_node_lock) @ /usr/src/sys/net80211/ieee80211_ioctl.c:1341 2nd 0xffffff8000925018 ath0_com_lock (ath0_com_lock) @ /usr/src/sys/net80211/ieee80211_node.c:2619 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b kdb_backtrace() at kdb_backtrace+0x39 witness_checkorder() at witness_checkorder+0xc37 _mtx_lock_flags() at _mtx_lock_flags+0x83 ieee80211_node_leave() at ieee80211_node_leave+0x97 setmlme_common() at setmlme_common+0x3f7 ieee80211_ioctl_setmlme() at ieee80211_ioctl_setmlme+0x87 ieee80211_ioctl_set80211() at ieee80211_ioctl_set80211+0x5a5 in_control() at in_control+0x216 ifioctl() at ifioctl+0x1020 kern_ioctl() at kern_ioctl+0x1b0 sys_ioctl() at sys_ioctl+0x11f amd64_syscall() at amd64_syscall+0x25a Xfast_syscall() at Xfast_syscall+0xfb --- syscall (54, FreeBSD ELF64, sys_ioctl), rip = 0x801203b8a, rsp = 0x7fffffffd9b8, rbp = 0x7fffffffda20 --- -- thanks -kim
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