Re: [PATCH 6.12.y] scsi: storvsc: Ratelimit warning logs to prevent VM denial of service

[Greg KH <gregkh@linuxfoundation.org>]

On Tue, Jan 28, 2025 at 09:08:42AM -0800, Easwar Hariharan wrote:
> On 1/27/2025 9:35 PM, Greg KH wrote:
> > On Mon, Jan 27, 2025 at 06:29:54PM +0000, Easwar Hariharan wrote:
> >> commit d2138eab8cde61e0e6f62d0713e45202e8457d6d upstream
> >>
> >> If there's a persistent error in the hypervisor, the SCSI warning for
> >> failed I/O can flood the kernel log and max out CPU utilization,
> >> preventing troubleshooting from the VM side. Ratelimit the warning so
> >> it doesn't DoS the VM.
> >>
> >> Closes: https://github.com/microsoft/WSL/issues/9173
> >> Signed-off-by: Easwar Hariharan <eahariha@linux.microsoft.com>
> >> Link: https://lore.kernel.org/r/20250107-eahariha-ratelimit-storvsc-v1-1-7fc193d1f2b0@linux.microsoft.com
> >> Reviewed-by: Michael Kelley <mhklinux@outlook.com>
> >> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
> >> Signed-off-by: Easwar Hariharan <eahariha@linux.microsoft.com>
> >> ---
> >>  drivers/scsi/storvsc_drv.c | 8 +++++++-
> >>  1 file changed, 7 insertions(+), 1 deletion(-)
> > 
> > What about 6.13.y?
> > 
> 
> Yes, needs a backport to that too, another miss on my part. :(
> 
> Would you rather I send it after rc1 is tagged, or now for completeness?

Whenever you have it, we can't apply any of these until -rc1 is out.

thanks,

greg k-h