diff options
| author | Rahat Mahmood <rahat@google.com> | 2018-12-12 13:09:10 -0800 |
|---|---|---|
| committer | Shentubot <shentubot@google.com> | 2018-12-12 13:09:59 -0800 |
| commit | 75e39eaa74c65b6f7cfb95addb6ac0cbcc7d951a (patch) | |
| tree | 1a6b64491851e002727a08546f1168c89b9c32aa /pkg/sentry/mm/vma.go | |
| parent | a2c868a098fcb51dcdf629045c5f5c0f68c2766f (diff) | |
Pass information about map writableness to filesystems.
This is necessary to implement file seals for memfds.
PiperOrigin-RevId: 225239394
Change-Id: Ib3f1ab31385afc4b24e96cd81a05ef1bebbcbb70
Diffstat (limited to 'pkg/sentry/mm/vma.go')
| -rw-r--r-- | pkg/sentry/mm/vma.go | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/pkg/sentry/mm/vma.go b/pkg/sentry/mm/vma.go index dafdbd0e4..5c2c802f6 100644 --- a/pkg/sentry/mm/vma.go +++ b/pkg/sentry/mm/vma.go @@ -65,7 +65,7 @@ func (mm *MemoryManager) createVMALocked(ctx context.Context, opts memmap.MMapOp // Inform the Mappable, if any, of the new mapping. if opts.Mappable != nil { - if err := opts.Mappable.AddMapping(ctx, mm, ar, opts.Offset); err != nil { + if err := opts.Mappable.AddMapping(ctx, mm, ar, opts.Offset, !opts.Private && opts.MaxPerms.Write); err != nil { return vmaIterator{}, usermem.AddrRange{}, err } } @@ -332,7 +332,7 @@ func (mm *MemoryManager) removeVMAsLocked(ctx context.Context, ar usermem.AddrRa vmaAR := vseg.Range() vma := vseg.ValuePtr() if vma.mappable != nil { - vma.mappable.RemoveMapping(ctx, mm, vmaAR, vma.off) + vma.mappable.RemoveMapping(ctx, mm, vmaAR, vma.off, vma.isMappableAsWritable()) } if vma.id != nil { vma.id.DecRef() |