diff options
Diffstat (limited to 'pkg/sentry/mm/vma.go')
| -rw-r--r-- | pkg/sentry/mm/vma.go | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/pkg/sentry/mm/vma.go b/pkg/sentry/mm/vma.go index 28ba9f2f5..5c2c802f6 100644 --- a/pkg/sentry/mm/vma.go +++ b/pkg/sentry/mm/vma.go @@ -17,10 +17,8 @@ package mm import ( "fmt" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" "gvisor.googlesource.com/gvisor/pkg/sentry/arch" "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" "gvisor.googlesource.com/gvisor/pkg/sentry/limits" "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" @@ -55,23 +53,6 @@ func (mm *MemoryManager) createVMALocked(ctx context.Context, opts memmap.MMapOp return vmaIterator{}, usermem.AddrRange{}, syserror.ENOMEM } - if opts.MLockMode != memmap.MLockNone { - // Check against RLIMIT_MEMLOCK. - if creds := auth.CredentialsFromContext(ctx); !creds.HasCapabilityIn(linux.CAP_IPC_LOCK, creds.UserNamespace.Root()) { - mlockLimit := limits.FromContext(ctx).Get(limits.MemoryLocked).Cur - if mlockLimit == 0 { - return vmaIterator{}, usermem.AddrRange{}, syserror.EPERM - } - newLockedAS := mm.lockedAS + opts.Length - if opts.Unmap { - newLockedAS -= mm.mlockedBytesRangeLocked(ar) - } - if newLockedAS > mlockLimit { - return vmaIterator{}, usermem.AddrRange{}, syserror.EAGAIN - } - } - } - // Remove overwritten mappings. This ordering is consistent with Linux: // compare Linux's mm/mmap.c:mmap_region() => do_munmap(), // file->f_op->mmap(). @@ -104,14 +85,10 @@ func (mm *MemoryManager) createVMALocked(ctx context.Context, opts memmap.MMapOp maxPerms: opts.MaxPerms, private: opts.Private, growsDown: opts.GrowsDown, - mlockMode: opts.MLockMode, id: opts.MappingIdentity, hint: opts.Hint, }) mm.usageAS += opts.Length - if opts.MLockMode != memmap.MLockNone { - mm.lockedAS += opts.Length - } return vseg, ar, nil } @@ -224,17 +201,6 @@ func (mm *MemoryManager) findHighestAvailableLocked(length, alignment uint64, bo return 0, syserror.ENOMEM } -// Preconditions: mm.mappingMu must be locked. -func (mm *MemoryManager) mlockedBytesRangeLocked(ar usermem.AddrRange) uint64 { - var total uint64 - for vseg := mm.vmas.LowerBoundSegment(ar.Start); vseg.Ok() && vseg.Start() < ar.End; vseg = vseg.NextSegment() { - if vseg.ValuePtr().mlockMode != memmap.MLockNone { - total += uint64(vseg.Range().Intersect(ar).Length()) - } - } - return total -} - // getVMAsLocked ensures that vmas exist for all addresses in ar, and support // access of type (at, ignorePermissions). It returns: // @@ -372,9 +338,6 @@ func (mm *MemoryManager) removeVMAsLocked(ctx context.Context, ar usermem.AddrRa vma.id.DecRef() } mm.usageAS -= uint64(vmaAR.Length()) - if vma.mlockMode != memmap.MLockNone { - mm.lockedAS -= uint64(vmaAR.Length()) - } vgap = mm.vmas.Remove(vseg) vseg = vgap.NextSegment() } @@ -405,7 +368,6 @@ func (vmaSetFunctions) Merge(ar1 usermem.AddrRange, vma1 vma, ar2 usermem.AddrRa vma1.maxPerms != vma2.maxPerms || vma1.private != vma2.private || vma1.growsDown != vma2.growsDown || - vma1.mlockMode != vma2.mlockMode || vma1.id != vma2.id || vma1.hint != vma2.hint { return vma{}, false |