From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Hi,
This is the 2nd set for the virtiofsd - this set sits
on top of the 'base' set recently posted. Most of the changes
in the set are security related (with a couple more tagging
along because they were hard to separate).
Stefan's main chunks make the daemon check the input from
the guest; the upstream fuse code is much more trusting
about what it gets from the kernel; here the security
equation is inverted and the daemon is more trusted.
In adition the daemon now gets sandboxing/namespacing/seccomp
limited to stop anything escaping.
With this set virtiofsd is reasonably safe to use; we've
got some bug fixes (including some threading fixes) to send
as well though.
Dave
Dr. David Alan Gilbert (2):
virtiofsd: Plumb fuse_bufvec through to do_write_buf
virtiofsd: Pass write iov's all the way through
Eryu Guan (1):
virtiofsd: print log only when priority is high enough
Miklos Szeredi (1):
virtiofsd: passthrough_ll: add fallback for racy ops
Stefan Hajnoczi (18):
virtiofsd: passthrough_ll: add lo_map for ino/fh indirection
virtiofsd: passthrough_ll: add ino_map to hide lo_inode pointers
virtiofsd: passthrough_ll: add dirp_map to hide lo_dirp pointers
virtiofsd: passthrough_ll: add fd_map to hide file descriptors
virtiofsd: validate path components
virtiofsd: add fuse_mbuf_iter API
virtiofsd: validate input buffer sizes in do_write_buf()
virtiofsd: check input buffer size in fuse_lowlevel.c ops
virtiofsd: prevent ".." escape in lo_do_lookup()
virtiofsd: prevent ".." escape in lo_do_readdir()
virtiofsd: use /proc/self/fd/ O_PATH file descriptor
virtiofsd: sandbox mount namespace
virtiofsd: move to an empty network namespace
virtiofsd: move to a new pid namespace
virtiofsd: add seccomp whitelist
virtiofsd: set maximum RLIMIT_NOFILE limit
virtiofsd: add security guide document
virtiofsd: add --syslog command-line option
Vivek Goyal (3):
virtiofsd: passthrough_ll: create new files in caller's context
virtiofsd: Parse flag FUSE_WRITE_KILL_PRIV
virtiofsd: Drop CAP_FSETID if client asked for it
contrib/virtiofsd/Makefile.objs | 7 +-
contrib/virtiofsd/buffer.c | 28 +
contrib/virtiofsd/fuse_common.h | 53 +-
contrib/virtiofsd/fuse_i.h | 2 +-
contrib/virtiofsd/fuse_log.c | 4 +
contrib/virtiofsd/fuse_lowlevel.c | 779 +++++++++++-----
contrib/virtiofsd/fuse_lowlevel.h | 2 +
contrib/virtiofsd/fuse_virtio.c | 72 +-
contrib/virtiofsd/helper.c | 11 +-
contrib/virtiofsd/passthrough_ll.c | 1317 ++++++++++++++++++++++++----
contrib/virtiofsd/seccomp.c | 146 +++
contrib/virtiofsd/seccomp.h | 16 +
contrib/virtiofsd/security.rst | 108 +++
13 files changed, 2152 insertions(+), 393 deletions(-)
create mode 100644 contrib/virtiofsd/seccomp.c
create mode 100644 contrib/virtiofsd/seccomp.h
create mode 100644 contrib/virtiofsd/security.rst
--
2.23.0