On 16/08/17 11:20, Jan Beulich wrote: > There is no guarantee that the compiler would actually translate them > to branches instead of calls, so only ones with a known recursion limit > are okay: > - __release_grant_for_copy() can call itself only once, as > __acquire_grant_for_copy() won't permit use of multi-level transitive > grants, > - __acquire_grant_for_copy() is fine to call itself with the last > argument false, as that prevents further recursion, > - __acquire_grant_for_copy() must not call itself to recover from an > observed change to the active entry's pin count > > This is part of XSA-226. > > Signed-off-by: Jan Beulich <[email protected]>
Reviewed-by: Andrew Cooper <[email protected]> _______________________________________________ Xen-devel mailing list [email protected] https://lists.xen.org/xen-devel
