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SubjectRe: [PATCH] Fix: buffer overflow during hvc_alloc().
From
Date
On 6/4/20 6:05 pm, Andrew Melnichenko wrote:
>
> Steps to Reproduce:
>
> 1. boot guest with command [1]
> 2. load and unload virtio_console inside guest with loop.sh
>    # cat loop.sh
>     while [ 1 ]
>     do
> modprobe virtio_console
> lsmod | grep virt
> modprobe -r virtio_console
> lsmod | grep virt
>     done
>
>
>
> Actual results:
> Guest reboot and can get vmcore-dmesg.txt file
>
>
> Expected results:
> Guest works well without error
>
>
> Additional info:
> The whole log will attach to the attachments.
>
> Call Trace:
> [   22.974500] fuse: init (API version 7.31)
> [   81.498208] ------------[ cut here ]------------
> [   81.499263] pvqspinlock: lock 0xffffffff92080020 has corrupted
> value 0xc0774ca0!
> [   81.501000] WARNING: CPU: 0 PID: 785 at
> kernel/locking/qspinlock_paravirt.h:500

[snip]

Thanks!

You should include an appropriate excerpt from this - the WARNING
message and stack trace, and the steps to reproduce - in the commit
message of the patch.


--
Andrew Donnellan OzLabs, ADL Canberra
ajd@linux.ibm.com IBM Australia Limited

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