diff options
| -rw-r--r-- | pkg/sentry/mm/pma.go | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/pkg/sentry/mm/pma.go b/pkg/sentry/mm/pma.go index 5690fe6b4..63c50f719 100644 --- a/pkg/sentry/mm/pma.go +++ b/pkg/sentry/mm/pma.go @@ -138,6 +138,10 @@ func (mm *MemoryManager) getPMAsLocked(ctx context.Context, vseg vmaIterator, ar var cowerr error if opts.breakCOW { + if pend.Start() < ar.End { + // Adjust ar to reflect missing pmas. + ar.End = pend.Start() + } var invalidated bool pend, invalidated, cowerr = mm.breakCopyOnWriteLocked(pstart, ar) if pend.Start() <= ar.Start { @@ -189,6 +193,10 @@ func (mm *MemoryManager) getVecPMAsLocked(ctx context.Context, ars usermem.AddrR if !pstart.Ok() { pstart = mm.findOrSeekPrevUpperBoundPMA(ar.Start, pend) } + if pend.Start() < ar.End { + // Adjust ar to reflect missing pmas. + ar.End = pend.Start() + } pend, _, cowerr = mm.breakCopyOnWriteLocked(pstart, ar) } |