diff options
author | gVisor bot <gvisor-bot@google.com> | 2020-09-04 06:33:55 +0000 |
---|---|---|
committer | gVisor bot <gvisor-bot@google.com> | 2020-09-04 06:33:55 +0000 |
commit | 5bd166a465a48fc359583afcc723f2883a8dc38b (patch) | |
tree | 85faa1b7381cc052d231cf654e5de93b2b7714ba /pkg | |
parent | 27719ce07c53993b758ce7cc3ca298c1f9335b3a (diff) | |
parent | c564293b65eefcf1342023694e4aae82314de014 (diff) |
Merge release-20200818.0-123-gc564293b6 (automated)
Diffstat (limited to 'pkg')
-rw-r--r-- | pkg/abi/linux/linux_abi_autogen_unsafe.go | 26 | ||||
-rw-r--r-- | pkg/abi/linux/linux_amd64_abi_autogen_unsafe.go | 6 | ||||
-rw-r--r-- | pkg/abi/linux/linux_arm64_abi_autogen_unsafe.go | 6 | ||||
-rw-r--r-- | pkg/sentry/kernel/seqatomic_taskgoroutineschedinfo_unsafe.go | 6 | ||||
-rw-r--r-- | pkg/sentry/platform/ring0/defs_impl_arm64.go | 2 | ||||
-rw-r--r-- | pkg/sentry/syscalls/linux/vfs2/splice.go | 22 | ||||
-rw-r--r-- | pkg/sentry/time/seqatomic_parameters_unsafe.go | 6 |
7 files changed, 40 insertions, 34 deletions
diff --git a/pkg/abi/linux/linux_abi_autogen_unsafe.go b/pkg/abi/linux/linux_abi_autogen_unsafe.go index f13a88649..8b584fd2a 100644 --- a/pkg/abi/linux/linux_abi_autogen_unsafe.go +++ b/pkg/abi/linux/linux_abi_autogen_unsafe.go @@ -155,7 +155,7 @@ func (s *Statx) UnmarshalBytes(src []byte) { // Packed implements marshal.Marshallable.Packed. //go:nosplit func (s *Statx) Packed() bool { - return s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() + return s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() && s.Atime.Packed() } // MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe. @@ -181,7 +181,7 @@ func (s *Statx) UnmarshalUnsafe(src []byte) { // CopyOutN implements marshal.Marshallable.CopyOutN. //go:nosplit func (s *Statx) CopyOutN(task marshal.Task, addr usermem.Addr, limit int) (int, error) { - if !s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() { + if !s.Ctime.Packed() && s.Mtime.Packed() && s.Atime.Packed() && s.Btime.Packed() { // Type Statx doesn't have a packed layout in memory, fall back to MarshalBytes. buf := task.CopyScratchBuffer(s.SizeBytes()) // escapes: okay. s.MarshalBytes(buf) // escapes: fallback. @@ -211,7 +211,7 @@ func (s *Statx) CopyOut(task marshal.Task, addr usermem.Addr) (int, error) { // CopyIn implements marshal.Marshallable.CopyIn. //go:nosplit func (s *Statx) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) { - if !s.Mtime.Packed() && s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() { + if !s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() { // Type Statx doesn't have a packed layout in memory, fall back to UnmarshalBytes. buf := task.CopyScratchBuffer(s.SizeBytes()) // escapes: okay. length, err := task.CopyInBytes(addr, buf) // escapes: okay. @@ -635,7 +635,7 @@ func (f *FUSEHeaderIn) Packed() bool { // MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe. func (f *FUSEHeaderIn) MarshalUnsafe(dst []byte) { - if f.Unique.Packed() && f.Opcode.Packed() { + if f.Opcode.Packed() && f.Unique.Packed() { safecopy.CopyIn(dst, unsafe.Pointer(f)) } else { // Type FUSEHeaderIn doesn't have a packed layout in memory, fallback to MarshalBytes. @@ -656,7 +656,7 @@ func (f *FUSEHeaderIn) UnmarshalUnsafe(src []byte) { // CopyOutN implements marshal.Marshallable.CopyOutN. //go:nosplit func (f *FUSEHeaderIn) CopyOutN(task marshal.Task, addr usermem.Addr, limit int) (int, error) { - if !f.Unique.Packed() && f.Opcode.Packed() { + if !f.Opcode.Packed() && f.Unique.Packed() { // Type FUSEHeaderIn doesn't have a packed layout in memory, fall back to MarshalBytes. buf := task.CopyScratchBuffer(f.SizeBytes()) // escapes: okay. f.MarshalBytes(buf) // escapes: fallback. @@ -712,7 +712,7 @@ func (f *FUSEHeaderIn) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) // WriteTo implements io.WriterTo.WriteTo. func (f *FUSEHeaderIn) WriteTo(writer io.Writer) (int64, error) { - if !f.Opcode.Packed() && f.Unique.Packed() { + if !f.Unique.Packed() && f.Opcode.Packed() { // Type FUSEHeaderIn doesn't have a packed layout in memory, fall back to MarshalBytes. buf := make([]byte, f.SizeBytes()) f.MarshalBytes(buf) @@ -2023,7 +2023,7 @@ func (i *IPTEntry) UnmarshalBytes(src []byte) { // Packed implements marshal.Marshallable.Packed. //go:nosplit func (i *IPTEntry) Packed() bool { - return i.Counters.Packed() && i.IP.Packed() + return i.IP.Packed() && i.Counters.Packed() } // MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe. @@ -2237,7 +2237,7 @@ func (i *IPTIP) UnmarshalUnsafe(src []byte) { // CopyOutN implements marshal.Marshallable.CopyOutN. //go:nosplit func (i *IPTIP) CopyOutN(task marshal.Task, addr usermem.Addr, limit int) (int, error) { - if !i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() { + if !i.SrcMask.Packed() && i.DstMask.Packed() && i.Src.Packed() && i.Dst.Packed() { // Type IPTIP doesn't have a packed layout in memory, fall back to MarshalBytes. buf := task.CopyScratchBuffer(i.SizeBytes()) // escapes: okay. i.MarshalBytes(buf) // escapes: fallback. @@ -2267,7 +2267,7 @@ func (i *IPTIP) CopyOut(task marshal.Task, addr usermem.Addr) (int, error) { // CopyIn implements marshal.Marshallable.CopyIn. //go:nosplit func (i *IPTIP) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) { - if !i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() { + if !i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() && i.Src.Packed() { // Type IPTIP doesn't have a packed layout in memory, fall back to UnmarshalBytes. buf := task.CopyScratchBuffer(i.SizeBytes()) // escapes: okay. length, err := task.CopyInBytes(addr, buf) // escapes: okay. @@ -2293,7 +2293,7 @@ func (i *IPTIP) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) { // WriteTo implements io.WriterTo.WriteTo. func (i *IPTIP) WriteTo(writer io.Writer) (int64, error) { - if !i.SrcMask.Packed() && i.DstMask.Packed() && i.Src.Packed() && i.Dst.Packed() { + if !i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() { // Type IPTIP doesn't have a packed layout in memory, fall back to MarshalBytes. buf := make([]byte, i.SizeBytes()) i.MarshalBytes(buf) @@ -3058,7 +3058,7 @@ func (i *IP6TEntry) CopyOut(task marshal.Task, addr usermem.Addr) (int, error) { // CopyIn implements marshal.Marshallable.CopyIn. //go:nosplit func (i *IP6TEntry) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) { - if !i.IPv6.Packed() && i.Counters.Packed() { + if !i.Counters.Packed() && i.IPv6.Packed() { // Type IP6TEntry doesn't have a packed layout in memory, fall back to UnmarshalBytes. buf := task.CopyScratchBuffer(i.SizeBytes()) // escapes: okay. length, err := task.CopyInBytes(addr, buf) // escapes: okay. @@ -3199,7 +3199,7 @@ func (i *IP6TIP) UnmarshalBytes(src []byte) { // Packed implements marshal.Marshallable.Packed. //go:nosplit func (i *IP6TIP) Packed() bool { - return i.SrcMask.Packed() && i.DstMask.Packed() && i.Src.Packed() && i.Dst.Packed() + return i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() } // MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe. @@ -3255,7 +3255,7 @@ func (i *IP6TIP) CopyOut(task marshal.Task, addr usermem.Addr) (int, error) { // CopyIn implements marshal.Marshallable.CopyIn. //go:nosplit func (i *IP6TIP) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) { - if !i.SrcMask.Packed() && i.DstMask.Packed() && i.Src.Packed() && i.Dst.Packed() { + if !i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() { // Type IP6TIP doesn't have a packed layout in memory, fall back to UnmarshalBytes. buf := task.CopyScratchBuffer(i.SizeBytes()) // escapes: okay. length, err := task.CopyInBytes(addr, buf) // escapes: okay. diff --git a/pkg/abi/linux/linux_amd64_abi_autogen_unsafe.go b/pkg/abi/linux/linux_amd64_abi_autogen_unsafe.go index a61fcea18..c49b2aecc 100644 --- a/pkg/abi/linux/linux_amd64_abi_autogen_unsafe.go +++ b/pkg/abi/linux/linux_amd64_abi_autogen_unsafe.go @@ -288,7 +288,7 @@ func (s *Stat) UnmarshalBytes(src []byte) { // Packed implements marshal.Marshallable.Packed. //go:nosplit func (s *Stat) Packed() bool { - return s.MTime.Packed() && s.CTime.Packed() && s.ATime.Packed() + return s.ATime.Packed() && s.MTime.Packed() && s.CTime.Packed() } // MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe. @@ -303,7 +303,7 @@ func (s *Stat) MarshalUnsafe(dst []byte) { // UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe. func (s *Stat) UnmarshalUnsafe(src []byte) { - if s.MTime.Packed() && s.CTime.Packed() && s.ATime.Packed() { + if s.CTime.Packed() && s.ATime.Packed() && s.MTime.Packed() { safecopy.CopyOut(unsafe.Pointer(s), src) } else { // Type Stat doesn't have a packed layout in memory, fallback to UnmarshalBytes. @@ -344,7 +344,7 @@ func (s *Stat) CopyOut(task marshal.Task, addr usermem.Addr) (int, error) { // CopyIn implements marshal.Marshallable.CopyIn. //go:nosplit func (s *Stat) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) { - if !s.ATime.Packed() && s.MTime.Packed() && s.CTime.Packed() { + if !s.MTime.Packed() && s.CTime.Packed() && s.ATime.Packed() { // Type Stat doesn't have a packed layout in memory, fall back to UnmarshalBytes. buf := task.CopyScratchBuffer(s.SizeBytes()) // escapes: okay. length, err := task.CopyInBytes(addr, buf) // escapes: okay. diff --git a/pkg/abi/linux/linux_arm64_abi_autogen_unsafe.go b/pkg/abi/linux/linux_arm64_abi_autogen_unsafe.go index b4c8c2de9..932f78be4 100644 --- a/pkg/abi/linux/linux_arm64_abi_autogen_unsafe.go +++ b/pkg/abi/linux/linux_arm64_abi_autogen_unsafe.go @@ -300,7 +300,7 @@ func (s *Stat) Packed() bool { // MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe. func (s *Stat) MarshalUnsafe(dst []byte) { - if s.CTime.Packed() && s.ATime.Packed() && s.MTime.Packed() { + if s.ATime.Packed() && s.MTime.Packed() && s.CTime.Packed() { safecopy.CopyIn(dst, unsafe.Pointer(s)) } else { // Type Stat doesn't have a packed layout in memory, fallback to MarshalBytes. @@ -321,7 +321,7 @@ func (s *Stat) UnmarshalUnsafe(src []byte) { // CopyOutN implements marshal.Marshallable.CopyOutN. //go:nosplit func (s *Stat) CopyOutN(task marshal.Task, addr usermem.Addr, limit int) (int, error) { - if !s.CTime.Packed() && s.ATime.Packed() && s.MTime.Packed() { + if !s.ATime.Packed() && s.MTime.Packed() && s.CTime.Packed() { // Type Stat doesn't have a packed layout in memory, fall back to MarshalBytes. buf := task.CopyScratchBuffer(s.SizeBytes()) // escapes: okay. s.MarshalBytes(buf) // escapes: fallback. @@ -377,7 +377,7 @@ func (s *Stat) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) { // WriteTo implements io.WriterTo.WriteTo. func (s *Stat) WriteTo(writer io.Writer) (int64, error) { - if !s.ATime.Packed() && s.MTime.Packed() && s.CTime.Packed() { + if !s.MTime.Packed() && s.CTime.Packed() && s.ATime.Packed() { // Type Stat doesn't have a packed layout in memory, fall back to MarshalBytes. buf := make([]byte, s.SizeBytes()) s.MarshalBytes(buf) diff --git a/pkg/sentry/kernel/seqatomic_taskgoroutineschedinfo_unsafe.go b/pkg/sentry/kernel/seqatomic_taskgoroutineschedinfo_unsafe.go index 90148bbb2..a0f2fe45c 100644 --- a/pkg/sentry/kernel/seqatomic_taskgoroutineschedinfo_unsafe.go +++ b/pkg/sentry/kernel/seqatomic_taskgoroutineschedinfo_unsafe.go @@ -1,12 +1,12 @@ package kernel import ( - "fmt" - "reflect" - "strings" "unsafe" + "fmt" "gvisor.dev/gvisor/pkg/sync" + "reflect" + "strings" ) // SeqAtomicLoad returns a copy of *ptr, ensuring that the read does not race diff --git a/pkg/sentry/platform/ring0/defs_impl_arm64.go b/pkg/sentry/platform/ring0/defs_impl_arm64.go index 424b66f76..8ebfbfdb6 100644 --- a/pkg/sentry/platform/ring0/defs_impl_arm64.go +++ b/pkg/sentry/platform/ring0/defs_impl_arm64.go @@ -1,10 +1,10 @@ package ring0 import ( - "gvisor.dev/gvisor/pkg/sentry/arch" "gvisor.dev/gvisor/pkg/sentry/platform/ring0/pagetables" "fmt" + "gvisor.dev/gvisor/pkg/sentry/arch" "gvisor.dev/gvisor/pkg/usermem" "io" "reflect" diff --git a/pkg/sentry/syscalls/linux/vfs2/splice.go b/pkg/sentry/syscalls/linux/vfs2/splice.go index 68ce94778..5543cfac2 100644 --- a/pkg/sentry/syscalls/linux/vfs2/splice.go +++ b/pkg/sentry/syscalls/linux/vfs2/splice.go @@ -18,6 +18,7 @@ import ( "io" "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/log" "gvisor.dev/gvisor/pkg/sentry/arch" "gvisor.dev/gvisor/pkg/sentry/kernel" "gvisor.dev/gvisor/pkg/sentry/kernel/pipe" @@ -390,16 +391,21 @@ func Sendfile(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc err = dw.waitForOut(t) } if err != nil { - // We didn't complete the write. Only - // report the bytes that were actually - // written, and rewind the offset. + // We didn't complete the write. Only report the bytes that were actually + // written, and rewind offsets as needed. notWritten := int64(len(wbuf)) n -= notWritten - if offset != -1 { - // TODO(gvisor.dev/issue/3779): The inFile offset will be incorrect if we - // roll back, because it has already been advanced by the full amount. - // Merely seeking on inFile does not work, because there may be concurrent - // file operations. + if offset == -1 { + // We modified the offset of the input file itself during the read + // operation. Rewind it. + if _, seekErr := inFile.Seek(t, -notWritten, linux.SEEK_CUR); seekErr != nil { + // Log the error but don't return it, since the write has already + // completed successfully. + log.Warningf("failed to roll back input file offset: %v", seekErr) + } + } else { + // The sendfile call was provided an offset parameter that should be + // adjusted to reflect the number of bytes sent. Rewind it. offset -= notWritten } break diff --git a/pkg/sentry/time/seqatomic_parameters_unsafe.go b/pkg/sentry/time/seqatomic_parameters_unsafe.go index 2cb001080..f18440378 100644 --- a/pkg/sentry/time/seqatomic_parameters_unsafe.go +++ b/pkg/sentry/time/seqatomic_parameters_unsafe.go @@ -1,12 +1,12 @@ package time import ( - "fmt" - "reflect" - "strings" "unsafe" + "fmt" "gvisor.dev/gvisor/pkg/sync" + "reflect" + "strings" ) // SeqAtomicLoad returns a copy of *ptr, ensuring that the read does not race |