panic: Duplicate free
Robert Watson
rwatson at freebsd.org
Tue Nov 2 09:03:39 PST 2004
On Mon, 1 Nov 2004, Andrzej Tobola wrote:
> Today -current, diskless station boot:
Could you try running "show pcpu", and then try an explicit call to trace
with the pid of the current thread running on the current CPU?
Occasionally I've seen this work in situations where otherwise a trace
doesn't (such as sometimes in interrupts).
Robert N M Watson FreeBSD Core Team, TrustedBSD Projects
robert at fledge.watson.org Principal Research Scientist, McAfee Research
>
> ....
> subnet mask ......
> Adjusted interface sis0
> SLab at 0xc0fcdfa8, freei 8 = 0.
> panic: Duplicate free of item 0xc0fcd800 from zone 0xc0c45ae0(Mbuf)
>
> KDB: enter: panic
> [thread 100001]
> Stopped at kdb_enter+0x2a: movl %esi,%esi
> db> where
> *** error reading from address 104 ***
> db> trace
> *** error reading from address 104 ***
>
>
> When kernel is generated without:
> ....
> makeoptions DEBUG=-g
> options DDB
> options KDB
> options WITNESS
> options WITNESS_SKIPSPIN
> options INVARIANTS
> options INVARIANT_SUPPORT
>
> all is OK
>
> any clue ?
>
> -a
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