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    SubjectRe: [RFC PATCH] virtio_blk: Checking "private_data" to avoid kernel panic when hotplugging
    On Wed, Mar 28, 2012 at 11:40:33AM +0800, Ren Mingxin wrote:
    > Hi,
    > On guest with upstream's kernel(3.3.0-rc7), I
    > mounted virtblk as:
    > a) # mkfs /dev/vda
    > b) # mount /dev/vda /mnt
    > c) # cd /mnt
    > Then I did hotplug for virtblk via virsh on host as:
    > a) # sudo virsh detach-disk guest vda
    > b) # sudo virsh attach-disk guest /media/data/test.img vda
    > I encountered guest's kernel panic (*probability *
    > *event*)whose backtrace liked this:

    Any news here? Managed to trace?
    Does this still happen with 3.4-rc2?
    There's a chance you are hitting a race fixed by

    If it's still not fixed it might make sense to enable slab debugging -
    we might have a use after free here.


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