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Diffstat (limited to 'pkg/sentry/mm/syscalls.go')
-rw-r--r--pkg/sentry/mm/syscalls.go59
1 files changed, 30 insertions, 29 deletions
diff --git a/pkg/sentry/mm/syscalls.go b/pkg/sentry/mm/syscalls.go
index 7ad6b7c21..7b6715815 100644
--- a/pkg/sentry/mm/syscalls.go
+++ b/pkg/sentry/mm/syscalls.go
@@ -21,6 +21,7 @@ import (
"gvisor.dev/gvisor/pkg/abi/linux"
"gvisor.dev/gvisor/pkg/context"
+ "gvisor.dev/gvisor/pkg/errors/linuxerr"
"gvisor.dev/gvisor/pkg/hostarch"
"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
"gvisor.dev/gvisor/pkg/sentry/kernel/futex"
@@ -74,7 +75,7 @@ func (mm *MemoryManager) HandleUserFault(ctx context.Context, addr hostarch.Addr
// MMap establishes a memory mapping.
func (mm *MemoryManager) MMap(ctx context.Context, opts memmap.MMapOpts) (hostarch.Addr, error) {
if opts.Length == 0 {
- return 0, syserror.EINVAL
+ return 0, linuxerr.EINVAL
}
length, ok := hostarch.Addr(opts.Length).RoundUp()
if !ok {
@@ -85,7 +86,7 @@ func (mm *MemoryManager) MMap(ctx context.Context, opts memmap.MMapOpts) (hostar
if opts.Mappable != nil {
// Offset must be aligned.
if hostarch.Addr(opts.Offset).RoundDown() != hostarch.Addr(opts.Offset) {
- return 0, syserror.EINVAL
+ return 0, linuxerr.EINVAL
}
// Offset + length must not overflow.
if end := opts.Offset + opts.Length; end < opts.Offset {
@@ -99,7 +100,7 @@ func (mm *MemoryManager) MMap(ctx context.Context, opts memmap.MMapOpts) (hostar
// MAP_FIXED requires addr to be page-aligned; non-fixed mappings
// don't.
if opts.Fixed {
- return 0, syserror.EINVAL
+ return 0, linuxerr.EINVAL
}
opts.Addr = opts.Addr.RoundDown()
}
@@ -108,10 +109,10 @@ func (mm *MemoryManager) MMap(ctx context.Context, opts memmap.MMapOpts) (hostar
return 0, syserror.EACCES
}
if opts.Unmap && !opts.Fixed {
- return 0, syserror.EINVAL
+ return 0, linuxerr.EINVAL
}
if opts.GrowsDown && opts.Mappable != nil {
- return 0, syserror.EINVAL
+ return 0, linuxerr.EINVAL
}
// Get the new vma.
@@ -281,18 +282,18 @@ func (mm *MemoryManager) MapStack(ctx context.Context) (hostarch.AddrRange, erro
// MUnmap implements the semantics of Linux's munmap(2).
func (mm *MemoryManager) MUnmap(ctx context.Context, addr hostarch.Addr, length uint64) error {
if addr != addr.RoundDown() {
- return syserror.EINVAL
+ return linuxerr.EINVAL
}
if length == 0 {
- return syserror.EINVAL
+ return linuxerr.EINVAL
}
la, ok := hostarch.Addr(length).RoundUp()
if !ok {
- return syserror.EINVAL
+ return linuxerr.EINVAL
}
ar, ok := addr.ToRange(uint64(la))
if !ok {
- return syserror.EINVAL
+ return linuxerr.EINVAL
}
mm.mappingMu.Lock()
@@ -331,7 +332,7 @@ const (
func (mm *MemoryManager) MRemap(ctx context.Context, oldAddr hostarch.Addr, oldSize uint64, newSize uint64, opts MRemapOpts) (hostarch.Addr, error) {
// "Note that old_address has to be page aligned." - mremap(2)
if oldAddr.RoundDown() != oldAddr {
- return 0, syserror.EINVAL
+ return 0, linuxerr.EINVAL
}
// Linux treats an old_size that rounds up to 0 as 0, which is otherwise a
@@ -340,13 +341,13 @@ func (mm *MemoryManager) MRemap(ctx context.Context, oldAddr hostarch.Addr, oldS
oldSize = uint64(oldSizeAddr)
newSizeAddr, ok := hostarch.Addr(newSize).RoundUp()
if !ok || newSizeAddr == 0 {
- return 0, syserror.EINVAL
+ return 0, linuxerr.EINVAL
}
newSize = uint64(newSizeAddr)
oldEnd, ok := oldAddr.AddLength(oldSize)
if !ok {
- return 0, syserror.EINVAL
+ return 0, linuxerr.EINVAL
}
mm.mappingMu.Lock()
@@ -450,15 +451,15 @@ func (mm *MemoryManager) MRemap(ctx context.Context, oldAddr hostarch.Addr, oldS
case MRemapMustMove:
newAddr := opts.NewAddr
if newAddr.RoundDown() != newAddr {
- return 0, syserror.EINVAL
+ return 0, linuxerr.EINVAL
}
var ok bool
newAR, ok = newAddr.ToRange(newSize)
if !ok {
- return 0, syserror.EINVAL
+ return 0, linuxerr.EINVAL
}
if (hostarch.AddrRange{oldAddr, oldEnd}).Overlaps(newAR) {
- return 0, syserror.EINVAL
+ return 0, linuxerr.EINVAL
}
// Check that the new region is valid.
@@ -504,7 +505,7 @@ func (mm *MemoryManager) MRemap(ctx context.Context, oldAddr hostarch.Addr, oldS
if vma := vseg.ValuePtr(); vma.mappable != nil {
// Check that offset+length does not overflow.
if vma.off+uint64(newAR.Length()) < vma.off {
- return 0, syserror.EINVAL
+ return 0, linuxerr.EINVAL
}
// Inform the Mappable, if any, of the new mapping.
if err := vma.mappable.CopyMapping(ctx, mm, oldAR, newAR, vseg.mappableOffsetAt(oldAR.Start), vma.canWriteMappableLocked()); err != nil {
@@ -590,7 +591,7 @@ func (mm *MemoryManager) MRemap(ctx context.Context, oldAddr hostarch.Addr, oldS
// MProtect implements the semantics of Linux's mprotect(2).
func (mm *MemoryManager) MProtect(addr hostarch.Addr, length uint64, realPerms hostarch.AccessType, growsDown bool) error {
if addr.RoundDown() != addr {
- return syserror.EINVAL
+ return linuxerr.EINVAL
}
if length == 0 {
return nil
@@ -618,7 +619,7 @@ func (mm *MemoryManager) MProtect(addr hostarch.Addr, length uint64, realPerms h
}
if growsDown {
if !vseg.ValuePtr().growsDown {
- return syserror.EINVAL
+ return linuxerr.EINVAL
}
if ar.End <= vseg.Start() {
return syserror.ENOMEM
@@ -711,7 +712,7 @@ func (mm *MemoryManager) Brk(ctx context.Context, addr hostarch.Addr) (hostarch.
if addr < mm.brk.Start {
addr = mm.brk.End
mm.mappingMu.Unlock()
- return addr, syserror.EINVAL
+ return addr, linuxerr.EINVAL
}
// TODO(gvisor.dev/issue/156): This enforces RLIMIT_DATA, but is
@@ -780,7 +781,7 @@ func (mm *MemoryManager) MLock(ctx context.Context, addr hostarch.Addr, length u
la, _ := hostarch.Addr(length + addr.PageOffset()).RoundUp()
ar, ok := addr.RoundDown().ToRange(uint64(la))
if !ok {
- return syserror.EINVAL
+ return linuxerr.EINVAL
}
mm.mappingMu.Lock()
@@ -855,10 +856,10 @@ func (mm *MemoryManager) MLock(ctx context.Context, addr hostarch.Addr, length u
mm.activeMu.Unlock()
mm.mappingMu.RUnlock()
// Linux: mm/mlock.c:__mlock_posix_error_return()
- if err == syserror.EFAULT {
+ if linuxerr.Equals(linuxerr.EFAULT, err) {
return syserror.ENOMEM
}
- if err == syserror.ENOMEM {
+ if linuxerr.Equals(linuxerr.ENOMEM, err) {
return syserror.EAGAIN
}
return err
@@ -898,7 +899,7 @@ type MLockAllOpts struct {
// depending on opts.
func (mm *MemoryManager) MLockAll(ctx context.Context, opts MLockAllOpts) error {
if !opts.Current && !opts.Future {
- return syserror.EINVAL
+ return linuxerr.EINVAL
}
mm.mappingMu.Lock()
@@ -979,13 +980,13 @@ func (mm *MemoryManager) NumaPolicy(addr hostarch.Addr) (linux.NumaPolicy, uint6
// SetNumaPolicy implements the semantics of Linux's mbind().
func (mm *MemoryManager) SetNumaPolicy(addr hostarch.Addr, length uint64, policy linux.NumaPolicy, nodemask uint64) error {
if !addr.IsPageAligned() {
- return syserror.EINVAL
+ return linuxerr.EINVAL
}
// Linux allows this to overflow.
la, _ := hostarch.Addr(length).RoundUp()
ar, ok := addr.ToRange(uint64(la))
if !ok {
- return syserror.EINVAL
+ return linuxerr.EINVAL
}
if ar.Length() == 0 {
return nil
@@ -1021,7 +1022,7 @@ func (mm *MemoryManager) SetNumaPolicy(addr hostarch.Addr, length uint64, policy
func (mm *MemoryManager) SetDontFork(addr hostarch.Addr, length uint64, dontfork bool) error {
ar, ok := addr.ToRange(length)
if !ok {
- return syserror.EINVAL
+ return linuxerr.EINVAL
}
mm.mappingMu.Lock()
@@ -1047,7 +1048,7 @@ func (mm *MemoryManager) SetDontFork(addr hostarch.Addr, length uint64, dontfork
func (mm *MemoryManager) Decommit(addr hostarch.Addr, length uint64) error {
ar, ok := addr.ToRange(length)
if !ok {
- return syserror.EINVAL
+ return linuxerr.EINVAL
}
mm.mappingMu.RLock()
@@ -1063,7 +1064,7 @@ func (mm *MemoryManager) Decommit(addr hostarch.Addr, length uint64) error {
for vseg := mm.vmas.LowerBoundSegment(ar.Start); vseg.Ok() && vseg.Start() < ar.End; vseg = vseg.NextSegment() {
vma := vseg.ValuePtr()
if vma.mlockMode != memmap.MLockNone {
- return syserror.EINVAL
+ return linuxerr.EINVAL
}
vsegAR := vseg.Range().Intersect(ar)
// pseg should already correspond to either this vma or a later one,
@@ -1114,7 +1115,7 @@ type MSyncOpts struct {
// MSync implements the semantics of Linux's msync().
func (mm *MemoryManager) MSync(ctx context.Context, addr hostarch.Addr, length uint64, opts MSyncOpts) error {
if addr != addr.RoundDown() {
- return syserror.EINVAL
+ return linuxerr.EINVAL
}
if length == 0 {
return nil
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-09 19:57:40 +0000