Date: Wed, 29 Dec 2004 12:36:40 +0100 From: Antoine Brodin <antoine.brodin@laposte.net> To: freebsd-current@freebsd.org Subject: acquiring duplicate lock of same type: "network driver" Message-ID: <20041229123640.449339e1.antoine.brodin@laposte.net>
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Hi, Witness reports this on a recent -current box (2 days old) doing nat with pf : acquiring duplicate lock of same type: "network driver" 1st nv0 @ /usr/ports/net/nvnet/work/nvnet/module/../src/if_nv.c:1511 2nd skc0 @ /usr/src/sys/modules/sk/../../pci/if_sk.c:1112 KDB: stack backtrace: witness_checkorder(c2855c44,9,c07316ba,458) at witness_checkorder+0x500 _mtx_lock_flags(c2855c44,0,c07316ba,458,c2ac4e00) at _mtx_lock_flags+0x40 sk_jfree(e5a44340,c28e3000,0,c2857c00,e3c79c80) at sk_jfree+0x33 mb_free_ext(c2ac4e00) at mb_free_ext+0x36 m_freem(c2ac4e00,c2857c00,e5901000,e56fb0e0,c2857e60) at m_freem+0x21 nv_ospackettx(c2857c00,e56fb0e0,1,e5901000,0) at nv_ospackettx+0x73 UpdateTransmitDescRingData() at UpdateTransmitDescRingData+0xd3 (it probably happened before but I didn't have witness enabled) This could perhaps deadlock a box with 2 sk(4) interfaces... Cheers, Antoine
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