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Date:      Tue, 12 May 2015 16:00:36 +0200
From:      Nikos Vassiliadis <nvass@gmx.com>
To:        "freebsd-virtualization@freebsd.org" <freebsd-virtualization@freebsd.org>
Subject:   adding vtnet to bridge results to kernel panic
Message-ID:  <55520784.9050508@gmx.com>

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Hi,

I get this panic when I add vtnet0 to a bridge.

>
> Unread portion of the kernel message buffer:
> panic: if_setflag: decrement non-positive refcount 0 for flag 256
> cpuid = 1
> KDB: stack backtrace:
> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe01a5be54c0
> vpanic() at vpanic+0x189/frame 0xfffffe01a5be5540
> kassert_panic() at kassert_panic+0x132/frame 0xfffffe01a5be55b0
> if_setflag() at if_setflag+0x147/frame 0xfffffe01a5be5610
> ifpromisc() at ifpromisc+0x2c/frame 0xfffffe01a5be5640
> bridge_delete_member() at bridge_delete_member+0x3a8/frame 0xfffffe01a5be56c0
> bridge_ioctl_add() at bridge_ioctl_add+0x574/frame 0xfffffe01a5be5710
> bridge_ioctl() at bridge_ioctl+0x1ad/frame 0xfffffe01a5be57b0
> ifioctl() at ifioctl+0x9df/frame 0xfffffe01a5be5860
> kern_ioctl() at kern_ioctl+0x230/frame 0xfffffe01a5be58c0
> sys_ioctl() at sys_ioctl+0x153/frame 0xfffffe01a5be59a0
> amd64_syscall() at amd64_syscall+0x27f/frame 0xfffffe01a5be5ab0
> Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe01a5be5ab0
> --- syscall (54, FreeBSD ELF64, sys_ioctl), rip = 0x8011e09aa, rsp = 0x7fffffffe1f8, rbp = 0x7fffffffe2a0 ---
> KDB: enter: panic

Thanks in advance for any ideas,
Nikos



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