Date: Wed, 29 Jul 2009 18:26:11 +0200 From: Michael Tuexen <tuexen@freebsd.org> To: FreeBSD net mailing list <freebsd-net@freebsd.org> Cc: Bruce Simpson <bms@incunabulum.net> Subject: mld_mtx lock order reversal Message-ID: <30F5F8DF-111B-4931-8AA3-DDD18B3A5AB9@freebsd.org>
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Dear all, when doing a ifconfig gif0 down ifconfig gif0 -tunnel ifconfig gif0 destroy I got a the following message on the last command. Is this a false positive? Best regards Michael --- syscall (304, FreeBSD ELF64, kldload), rip = 0x8006923ac, rsp = 0x7fffffffed38, rbp = 0 --- lock order reversal: 1st 0xffffff0002995bc8 if_afdata (if_afdata) @ net/if.c:830 2nd 0xffffffff80de59c0 mld_mtx (mld_mtx) @ netinet6/mld6.c:570 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 mld_domifdetach() at mld_domifdetach+0x24 in6_domifdetach() at in6_domifdetach+0x11 if_detach() at if_detach+0x6ed gif_clone_destroy() at gif_clone_destroy+0xda ifc_simple_destroy() at ifc_simple_destroy+0x2a if_clone_destroyif() at if_clone_destroyif+0xc0 ifioctl() at ifioctl+0x6f5 kern_ioctl() at kern_ioctl+0xc5 ioctl() at ioctl+0xfd syscall() at syscall+0x1af Xfast_syscall() at Xfast_syscall+0xe1
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