On Sat, Feb 20, 2021 at 1:57 PM Ben Widawsky <[email protected]> wrote: > > When submitting a command for userspace, input and output payload bounce > buffers are allocated. For a given command, both input and output > buffers may exist and so when allocation of the input buffer fails, the > output buffer must be freed. As far as I can tell, userspace can't > easily exploit the leak to OOM a machine unless the machine was already > near OOM state. > > This bug was introduced in v5 of the patch and did not exist in prior > revisions. >
Thanks for the quick turnaround, but I think that speed introduced some issues... > While here, adjust the variable 'j' found in patch review by Konrad. Please split this pure cleanup to its own patch. The subject says "Fixes", but it's only the one fix. > > Cc: Al Viro <[email protected]> > Reported-by: Konrad Rzeszutek Wilk <[email protected]> Since the commit is upstream add a "Fixes" line: Fixes: 583fa5e71cae ('cxl/mem: Add basic IOCTL interface") > Signed-off-by: Ben Widawsky <[email protected]> > Reviewed-by: Dan Williams <[email protected]> (v2) > Reviewed-by: Jonathan Cameron <[email protected]> Jonathan and I didn't pre-review this. _______________________________________________ Linux-nvdimm mailing list -- [email protected] To unsubscribe send an email to [email protected]
