The archive backend passes remote .sqfs bytes straight to the go-diskfs squashfs
parser, which does not validate several attacker-controlled superblock and
metadata fields. A crafted image can make the parser panic.
Recover panics at the go-diskfs boundary and return an "invalid or corrupt
squashfs image" error instead. As well as the parse entry points (Read, ReadDir,
OpenFile) this wraps the reader returned by Open, since the parser reads file
data lazily and can panic long after the image opened successfully.
Addresses GHSA-6jcg-q3wp-x2f4.
Bump go-diskfs to v1.9.4, which contains diskfs/go-diskfs#413 handling
squashfs images that have no fragment table or no xattr table. On v1.9.3
these images fail to list at all (ReadDir errors, or a nil xattr-table
dereference inside the library).
Adapt the backend to the v1.9.4 io/fs API: ReadDir now returns
io/fs.DirEntry (metadata via DirEntry.Info), and files are opened via
FileSystem.OpenFile instead of the removed FileStat.Open. The path
conversion added in c10eb47 (toIOFS) is reused.
Add a regression test with two committed fixtures built from trivial
placeholder content: an empty directory (no fragment table) and a small
tree whose superblock has the NO_XATTRS flag set while inodes still carry
an xattr index.
Fixes#9004
The go-diskfs library now requires io/fs.ValidPath style paths (no
leading slash, "." for the root) so convert paths at the library
boundary. This fixes listing failures and the resulting test hangs
after the update to go-diskfs v1.9.3.
This fixes the code to compile with the updated dependencies:
- squashfs: implement the new Path method required by the go-diskfs
backend.Storage interface, returning an empty string as there is no
underlying path.
- dropbox: convert to and from the SDK's new DBXTime type (an alias
for time.Time) for ClientModified, TimeInvited and Expires.
- dropbox: remove a stray debug fmt.Printf from the shared folder
listing.
- pin go-systemd to v22.6.0 to fix netbsd builds
go-systemd v22.7.0 uses unix.ClockGettime and unix.CLOCK_MONOTONIC
which golang.org/x/sys does not define for netbsd, so the build fails.
See: https://github.com/coreos/go-systemd/issues/512
- pin google.golang.org/grpc to v1.80.0 to fix plan9 builds
grpc v1.81.0 and later use syscall.Errno, syscall.ECONNRESET and
syscall.ECONNABORTED which do not exist on plan9, so the build fails
See: https://github.com/grpc/grpc-go/issues/9253
Add a ctx parameter to vfs.New() so callers can pass in context
carrying ConfigInfo and FilterInfo. The context is stripped of
cancellation but config and filter values are preserved into a fresh
background context.
Nick Craig-Wood
maximilize