Re: exclusive sleep mutex ifnet r = 0 (0xc07cc940) locked @ net/if.c:459

From: Kris Kennaway (kris_at_obsecurity.org)
Date: 10/24/03

  • Next message: Eric Masson: "ipsec tunnels & packet length issues" 
    Date: Thu, 23 Oct 2003 20:02:15 -0700
To: Kris Kennaway <kris@obsecurity.org>

    On Thu, Oct 23, 2003 at 12:07:14PM -0700, Kris Kennaway wrote:
    > Updated to HEAD, booted with WITNESS enabled, and the boot dies here:
    >
    > ipfw2 initialized, divert disabled, rule-based forwarding enabled, default to accept, logging unlimited
    > malloc() of "16" with the following non-sleepable locks held:
    > exclusive sleep mutex ifnet r = 0 (0xc07cc940) locked @ net/if.c:459
    > Debugger("witness_warn")
    > Stopped at Debugger+0x54: xchgl %ebx,in_Debugger.0
    > db> trace
    > Debugger(c070f058,c0c21ce8,1,c07396e3,c0778ec0) at Debugger+0x54
    > witness_warn(5,0,c074cdc7,c072620e,c07cc940) at witness_warn+0x19f
    > uma_zalloc_arg(c103a900,0,2,0,c07cce74) at uma_zalloc_arg+0xa0
    > malloc(10,c0778ec0,2,1c,c077d100) at malloc+0xd3
    > in6_domifattach(c4742000,8c,c4742000,c07843f0,c26000) at in6_domifattach+0x27
    > if_attachdomain1(c4742000,0,c073e7c3,1cb,c0755fa4) at if_attachdomain1+0x3e
    > if_attachdomain(0,c1e000,c1ec00,c1e000,0) at if_attachdomain+0x48
    > mi_startup() at mi_startup+0xb5
    > begin() at begin+0x2c
    >
    > Can you please investigate?

    I turned off WITNESS_DDB and it gives a lot of other warnings,
    including a number of these:

    exclusive sleep mutex ifnet r = 0 (0xc07cc940) locked @ netinet6/in6.c:2295
    malloc() of "16" with the following non-sleepable locks held:

    Kris

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