diff options
Diffstat (limited to 'pkg/sentry/mm/syscalls.go')
| -rw-r--r-- | pkg/sentry/mm/syscalls.go | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/pkg/sentry/mm/syscalls.go b/pkg/sentry/mm/syscalls.go index 0368c6794..af1e53f5d 100644 --- a/pkg/sentry/mm/syscalls.go +++ b/pkg/sentry/mm/syscalls.go @@ -470,6 +470,16 @@ func (mm *MemoryManager) MRemap(ctx context.Context, oldAddr usermem.Addr, oldSi return 0, syserror.EINVAL } + // Check that the new region is valid. + _, err := mm.findAvailableLocked(newSize, findAvailableOpts{ + Addr: newAddr, + Fixed: true, + Unmap: true, + }) + if err != nil { + return 0, err + } + // Unmap any mappings at the destination. mm.unmapLocked(ctx, newAR) |