Date: Wed, 21 Nov 2012 16:31:47 -0800 From: Rui Paulo <rpaulo@FreeBSD.org> To: "<freebsd-net@freebsd.org>" <freebsd-net@freebsd.org> Cc: Hiroki Sato <hrs@allbsd.org>, "Andrey V. Elsukov" <ae@FreeBSD.org> Subject: LOR in rtsock/ifnet Message-ID: <7C5421B8-9D32-4771-B453-151D9D07A214@FreeBSD.org>
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I just started seeing this on r243286. lock order reversal: 1st 0xfffffe0001b40400 if_addr_lock (if_addr_lock) @ = /usr/home/rpaulo/freebsd/head/sys/net/rtsock.c:1818 2nd 0xffffffff80c693f8 ifnet_rw (ifnet_rw) @ = /usr/home/rpaulo/freebsd/head/sys/net/if.c:241 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 __rw_rlock() at __rw_rlock+0x8c ifnet_byindex() at ifnet_byindex+0x22 sa6_recoverscope() at sa6_recoverscope+0x7b rt_msg2() at rt_msg2+0x1a2 sysctl_rtsock() at sysctl_rtsock+0x68c sysctl_root() at sysctl_root+0x1d7 userland_sysctl() at userland_sysctl+0x192 sys___sysctl() at sys___sysctl+0x74 amd64_syscall() at amd64_syscall+0x265 Xfast_syscall() at Xfast_syscall+0xfb --- syscall (202, FreeBSD ELF64, sys___sysctl), rip =3D 0x8011813ea, rsp = =3D 0x7fffffffd408, rbp =3D 0x7fffffffd440 --- Regards, -- Rui Paulo
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