- Replace 0-length and 1-element arrays with flexible arrays in various
subsystems (Paulo Miguel Almeida, Stephen Rothwell, Kees Cook)
- randstruct: Disable Clang 15 support (Eric Biggers)
- GCC plugins: Drop -std=gnu++11 flag (Sam James)
- strpbrk(): Refactor to use strchr() (Andy Shevchenko)
- LoadPin LSM: Allow root filesystem switching when non-enforcing
- fortify: Use dynamic object size hints when available
- ext4: Fix CFI function prototype mismatch
- Nouveau: Fix DP buffer size arguments
- hisilicon: Wipe entire crypto DMA pool on error
- coda: Fully allocate sig_inputArgs
- UBSAN: Improve arm64 trap code reporting
- copy_struct_from_user(): Add minimum bounds check on kernel buffer size
-----BEGIN PGP SIGNATURE-----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=XnVa
-----END PGP SIGNATURE-----
Merge tag 'hardening-v6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull hardening updates from Kees Cook:
"Beyond some specific LoadPin, UBSAN, and fortify features, there are
other fixes scattered around in various subsystems where maintainers
were okay with me carrying them in my tree or were non-responsive but
the patches were reviewed by others:
- Replace 0-length and 1-element arrays with flexible arrays in
various subsystems (Paulo Miguel Almeida, Stephen Rothwell, Kees
Cook)
- randstruct: Disable Clang 15 support (Eric Biggers)
- GCC plugins: Drop -std=gnu++11 flag (Sam James)
- strpbrk(): Refactor to use strchr() (Andy Shevchenko)
- LoadPin LSM: Allow root filesystem switching when non-enforcing
- fortify: Use dynamic object size hints when available
- ext4: Fix CFI function prototype mismatch
- Nouveau: Fix DP buffer size arguments
- hisilicon: Wipe entire crypto DMA pool on error
- coda: Fully allocate sig_inputArgs
- UBSAN: Improve arm64 trap code reporting
- copy_struct_from_user(): Add minimum bounds check on kernel buffer
size"
* tag 'hardening-v6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
randstruct: disable Clang 15 support
uaccess: Add minimum bounds check on kernel buffer size
arm64: Support Clang UBSAN trap codes for better reporting
coda: Avoid partial allocation of sig_inputArgs
gcc-plugins: drop -std=gnu++11 to fix GCC 13 build
lib/string: Use strchr() in strpbrk()
crypto: hisilicon: Wipe entire pool on error
net/i40e: Replace 0-length array with flexible array
io_uring: Replace 0-length array with flexible array
ext4: Fix function prototype mismatch for ext4_feat_ktype
i915/gvt: Replace one-element array with flexible-array member
drm/nouveau/disp: Fix nvif_outp_acquire_dp() argument size
LoadPin: Allow filesystem switch when not enforcing
LoadPin: Move pin reporting cleanly out of locking
LoadPin: Refactor sysctl initialization
LoadPin: Refactor read-only check into a helper
ARM: ixp4xx: Replace 0-length arrays with flexible arrays
fortify: Use __builtin_dynamic_object_size() when available
rxrpc: replace zero-lenth array with DECLARE_FLEX_ARRAY() helper
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCY+5NlQAKCRCRxhvAZXjc
orOaAP9i2h3OJy95nO2Fpde0Bt2UT+oulKCCcGlvXJ8/+TQpyQD/ZQq47gFQ0EAz
Br5NxeyGeecAb0lHpFz+CpLGsxMrMwQ=
=+BG5
-----END PGP SIGNATURE-----
Merge tag 'fs.idmapped.v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping
Pull vfs idmapping updates from Christian Brauner:
- Last cycle we introduced the dedicated struct mnt_idmap type for
mount idmapping and the required infrastucture in 256c8aed2b ("fs:
introduce dedicated idmap type for mounts"). As promised in last
cycle's pull request message this converts everything to rely on
struct mnt_idmap.
Currently we still pass around the plain namespace that was attached
to a mount. This is in general pretty convenient but it makes it easy
to conflate namespaces that are relevant on the filesystem with
namespaces that are relevant on the mount level. Especially for
non-vfs developers without detailed knowledge in this area this was a
potential source for bugs.
This finishes the conversion. Instead of passing the plain namespace
around this updates all places that currently take a pointer to a
mnt_userns with a pointer to struct mnt_idmap.
Now that the conversion is done all helpers down to the really
low-level helpers only accept a struct mnt_idmap argument instead of
two namespace arguments.
Conflating mount and other idmappings will now cause the compiler to
complain loudly thus eliminating the possibility of any bugs. This
makes it impossible for filesystem developers to mix up mount and
filesystem idmappings as they are two distinct types and require
distinct helpers that cannot be used interchangeably.
Everything associated with struct mnt_idmap is moved into a single
separate file. With that change no code can poke around in struct
mnt_idmap. It can only be interacted with through dedicated helpers.
That means all filesystems are and all of the vfs is completely
oblivious to the actual implementation of idmappings.
We are now also able to extend struct mnt_idmap as we see fit. For
example, we can decouple it completely from namespaces for users that
don't require or don't want to use them at all. We can also extend
the concept of idmappings so we can cover filesystem specific
requirements.
In combination with the vfs{g,u}id_t work we finished in v6.2 this
makes this feature substantially more robust and thus difficult to
implement wrong by a given filesystem and also protects the vfs.
- Enable idmapped mounts for tmpfs and fulfill a longstanding request.
A long-standing request from users had been to make it possible to
create idmapped mounts for tmpfs. For example, to share the host's
tmpfs mount between multiple sandboxes. This is a prerequisite for
some advanced Kubernetes cases. Systemd also has a range of use-cases
to increase service isolation. And there are more users of this.
However, with all of the other work going on this was way down on the
priority list but luckily someone other than ourselves picked this
up.
As usual the patch is tiny as all the infrastructure work had been
done multiple kernel releases ago. In addition to all the tests that
we already have I requested that Rodrigo add a dedicated tmpfs
testsuite for idmapped mounts to xfstests. It is to be included into
xfstests during the v6.3 development cycle. This should add a slew of
additional tests.
* tag 'fs.idmapped.v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping: (26 commits)
shmem: support idmapped mounts for tmpfs
fs: move mnt_idmap
fs: port vfs{g,u}id helpers to mnt_idmap
fs: port fs{g,u}id helpers to mnt_idmap
fs: port i_{g,u}id_into_vfs{g,u}id() to mnt_idmap
fs: port i_{g,u}id_{needs_}update() to mnt_idmap
quota: port to mnt_idmap
fs: port privilege checking helpers to mnt_idmap
fs: port inode_owner_or_capable() to mnt_idmap
fs: port inode_init_owner() to mnt_idmap
fs: port acl to mnt_idmap
fs: port xattr to mnt_idmap
fs: port ->permission() to pass mnt_idmap
fs: port ->fileattr_set() to pass mnt_idmap
fs: port ->set_acl() to pass mnt_idmap
fs: port ->get_acl() to pass mnt_idmap
fs: port ->tmpfile() to pass mnt_idmap
fs: port ->rename() to pass mnt_idmap
fs: port ->mknod() to pass mnt_idmap
fs: port ->mkdir() to pass mnt_idmap
...
-----BEGIN PGP SIGNATURE-----
iIgEABYIADAWIQRE6pSOnaBC00OEHEIaerohdGur0gUCY+nxHhIcamFya2tvQGtl
cm5lbC5vcmcACgkQGnq6IXRrq9ItyQEA7Xp/hktO8d20p5Xhd/EwdB/R1TveLE99
RfkoTznkWaQBANQLu1I3TfJGPhZ8eof8rWqqCyXxzlnr3ss2oVEoDn8A
=dr1h
-----END PGP SIGNATURE-----
Merge tag 'tpm-v6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd
Pull tpm updates from Jarkko Sakkinen:
"In additon to bug fixes, these are noteworthy changes:
- In TPM I2C drivers, migrate from probe() to probe_new() (a new
driver model in I2C).
- TPM CRB: Pluton support
- Add duplicate hash detection to the blacklist keyring in order to
give more meaningful klog output than e.g. [1]"
Link: https://askubuntu.com/questions/1436856/ubuntu-22-10-blacklist-problem-blacklisting-hash-13-message-on-boot [1]
* tag 'tpm-v6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd:
tpm: add vendor flag to command code validation
tpm: Add reserved memory event log
tpm: Use managed allocation for bios event log
tpm: tis_i2c: Convert to i2c's .probe_new()
tpm: tpm_i2c_nuvoton: Convert to i2c's .probe_new()
tpm: tpm_i2c_infineon: Convert to i2c's .probe_new()
tpm: tpm_i2c_atmel: Convert to i2c's .probe_new()
tpm: st33zp24: Convert to i2c's .probe_new()
KEYS: asymmetric: Fix ECDSA use via keyctl uapi
certs: don't try to update blacklist keys
KEYS: Add new function key_create()
certs: make blacklisted hash available in klog
tpm_crb: Add support for CRB devices based on Pluton
crypto: certs: fix FIPS selftest dependency
This fixes a regression in mediation of getattr when old policy built
under an older ABI is loaded and mapped to internal permissions.
The regression does not occur for all getattr permission requests,
only appearing if state zero is the final state in the permission
lookup. This is because despite the first state (index 0) being
guaranteed to not have permissions in both newer and older permission
formats, it may have to carry permissions that were not mediated as
part of an older policy. These backward compat permissions are
mapped here to avoid special casing the mediation code paths.
Since the mapping code already takes into account backwards compat
permission from older formats it can be applied to state 0 to fix
the regression.
Fixes: 408d53e923 ("apparmor: compute file permissions on profile load")
Reported-by: Philip Meulengracht <the_meulengracht@hotmail.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
key_create() works like key_create_or_update() but does not allow
updating an existing key, instead returning ERR_PTR(-EEXIST).
key_create() will be used by the blacklist keyring which should not
create duplicate entries or update existing entries.
Instead a dedicated message with appropriate severity will be logged.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
The randstruct support released in Clang 15 is unsafe to use due to a
bug that can cause miscompilations: "-frandomize-layout-seed
inconsistently randomizes all-function-pointers structs"
(https://github.com/llvm/llvm-project/issues/60349). It has been fixed
on the Clang 16 release branch, so add a Clang version check.
Fixes: 035f7f87b7 ("randstruct: Enable Clang support")
Cc: stable@vger.kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Bill Wendling <morbo@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230208065133.220589-1-ebiggers@kernel.org
For LoadPin to be used at all in a classic distro environment, it needs
to allow for switching filesystems (from the initramfs to the "real"
root filesystem). To allow for this, if the "enforce" mode is not set at
boot, reset the pinned filesystem tracking when the pinned filesystem
gets unmounted instead of invalidating further loads. Once enforcement
is set, it cannot be unset, and the pinning will stick.
This means that distros can build with CONFIG_SECURITY_LOADPIN=y, but with
CONFIG_SECURITY_LOADPIN_ENFORCE disabled, but after boot is running,
the system can enable enforcement:
$ sysctl -w kernel.loadpin.enforced=1
Cc: Paul Moore <paul@paul-moore.com>
Cc: James Morris <jmorris@namei.org>
Cc: "Serge E. Hallyn" <serge@hallyn.com>
Cc: linux-security-module@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Serge Hallyn <serge@hallyn.com>
Link: https://lore.kernel.org/r/20221209195746.1366607-4-keescook@chromium.org
Refactor the pin reporting to be more cleanly outside the locking. It
was already, but moving it around helps clear the path for the root to
switch when not enforcing.
Cc: Paul Moore <paul@paul-moore.com>
Cc: James Morris <jmorris@namei.org>
Cc: "Serge E. Hallyn" <serge@hallyn.com>
Cc: linux-security-module@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Serge Hallyn <serge@hallyn.com>
Link: https://lore.kernel.org/r/20221209195746.1366607-3-keescook@chromium.org
In preparation for shifting root mount when not enforcing, split sysctl
logic out into a separate helper, and unconditionally register the
sysctl, but only make it writable when the device is writable.
Cc: Paul Moore <paul@paul-moore.com>
Cc: James Morris <jmorris@namei.org>
Cc: "Serge E. Hallyn" <serge@hallyn.com>
Cc: linux-security-module@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Serge Hallyn <serge@hallyn.com>
Link: https://lore.kernel.org/r/20221209195746.1366607-2-keescook@chromium.org
In preparation for allowing mounts to shift when not enforced, move
read-only checking into a separate helper.
Cc: Paul Moore <paul@paul-moore.com>
Cc: James Morris <jmorris@namei.org>
Cc: "Serge E. Hallyn" <serge@hallyn.com>
Cc: linux-security-module@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Serge Hallyn <serge@hallyn.com>
Link: https://lore.kernel.org/r/20221209195746.1366607-1-keescook@chromium.org
Convert to struct mnt_idmap.
Last cycle we merged the necessary infrastructure in
256c8aed2b ("fs: introduce dedicated idmap type for mounts").
This is just the conversion to struct mnt_idmap.
Currently we still pass around the plain namespace that was attached to a
mount. This is in general pretty convenient but it makes it easy to
conflate namespaces that are relevant on the filesystem with namespaces
that are relevent on the mount level. Especially for non-vfs developers
without detailed knowledge in this area this can be a potential source for
bugs.
Once the conversion to struct mnt_idmap is done all helpers down to the
really low-level helpers will take a struct mnt_idmap argument instead of
two namespace arguments. This way it becomes impossible to conflate the two
eliminating the possibility of any bugs. All of the vfs and all filesystems
only operate on struct mnt_idmap.
Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Convert to struct mnt_idmap.
Remove legacy file_mnt_user_ns() and mnt_user_ns().
Last cycle we merged the necessary infrastructure in
256c8aed2b ("fs: introduce dedicated idmap type for mounts").
This is just the conversion to struct mnt_idmap.
Currently we still pass around the plain namespace that was attached to a
mount. This is in general pretty convenient but it makes it easy to
conflate namespaces that are relevant on the filesystem with namespaces
that are relevent on the mount level. Especially for non-vfs developers
without detailed knowledge in this area this can be a potential source for
bugs.
Once the conversion to struct mnt_idmap is done all helpers down to the
really low-level helpers will take a struct mnt_idmap argument instead of
two namespace arguments. This way it becomes impossible to conflate the two
eliminating the possibility of any bugs. All of the vfs and all filesystems
only operate on struct mnt_idmap.
Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Convert to struct mnt_idmap.
Last cycle we merged the necessary infrastructure in
256c8aed2b ("fs: introduce dedicated idmap type for mounts").
This is just the conversion to struct mnt_idmap.
Currently we still pass around the plain namespace that was attached to a
mount. This is in general pretty convenient but it makes it easy to
conflate namespaces that are relevant on the filesystem with namespaces
that are relevent on the mount level. Especially for non-vfs developers
without detailed knowledge in this area this can be a potential source for
bugs.
Once the conversion to struct mnt_idmap is done all helpers down to the
really low-level helpers will take a struct mnt_idmap argument instead of
two namespace arguments. This way it becomes impossible to conflate the two
eliminating the possibility of any bugs. All of the vfs and all filesystems
only operate on struct mnt_idmap.
Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Convert to struct mnt_idmap.
Last cycle we merged the necessary infrastructure in
256c8aed2b ("fs: introduce dedicated idmap type for mounts").
This is just the conversion to struct mnt_idmap.
Currently we still pass around the plain namespace that was attached to a
mount. This is in general pretty convenient but it makes it easy to
conflate namespaces that are relevant on the filesystem with namespaces
that are relevent on the mount level. Especially for non-vfs developers
without detailed knowledge in this area this can be a potential source for
bugs.
Once the conversion to struct mnt_idmap is done all helpers down to the
really low-level helpers will take a struct mnt_idmap argument instead of
two namespace arguments. This way it becomes impossible to conflate the two
eliminating the possibility of any bugs. All of the vfs and all filesystems
only operate on struct mnt_idmap.
Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Convert to struct mnt_idmap.
Last cycle we merged the necessary infrastructure in
256c8aed2b ("fs: introduce dedicated idmap type for mounts").
This is just the conversion to struct mnt_idmap.
Currently we still pass around the plain namespace that was attached to a
mount. This is in general pretty convenient but it makes it easy to
conflate namespaces that are relevant on the filesystem with namespaces
that are relevent on the mount level. Especially for non-vfs developers
without detailed knowledge in this area this can be a potential source for
bugs.
Once the conversion to struct mnt_idmap is done all helpers down to the
really low-level helpers will take a struct mnt_idmap argument instead of
two namespace arguments. This way it becomes impossible to conflate the two
eliminating the possibility of any bugs. All of the vfs and all filesystems
only operate on struct mnt_idmap.
Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Convert to struct mnt_idmap.
Last cycle we merged the necessary infrastructure in
256c8aed2b ("fs: introduce dedicated idmap type for mounts").
This is just the conversion to struct mnt_idmap.
Currently we still pass around the plain namespace that was attached to a
mount. This is in general pretty convenient but it makes it easy to
conflate namespaces that are relevant on the filesystem with namespaces
that are relevent on the mount level. Especially for non-vfs developers
without detailed knowledge in this area this can be a potential source for
bugs.
Once the conversion to struct mnt_idmap is done all helpers down to the
really low-level helpers will take a struct mnt_idmap argument instead of
two namespace arguments. This way it becomes impossible to conflate the two
eliminating the possibility of any bugs. All of the vfs and all filesystems
only operate on struct mnt_idmap.
Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Convert to struct mnt_idmap.
Last cycle we merged the necessary infrastructure in
256c8aed2b ("fs: introduce dedicated idmap type for mounts").
This is just the conversion to struct mnt_idmap.
Currently we still pass around the plain namespace that was attached to a
mount. This is in general pretty convenient but it makes it easy to
conflate namespaces that are relevant on the filesystem with namespaces
that are relevent on the mount level. Especially for non-vfs developers
without detailed knowledge in this area this can be a potential source for
bugs.
Once the conversion to struct mnt_idmap is done all helpers down to the
really low-level helpers will take a struct mnt_idmap argument instead of
two namespace arguments. This way it becomes impossible to conflate the two
eliminating the possibility of any bugs. All of the vfs and all filesystems
only operate on struct mnt_idmap.
Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Convert to struct mnt_idmap.
Last cycle we merged the necessary infrastructure in
256c8aed2b ("fs: introduce dedicated idmap type for mounts").
This is just the conversion to struct mnt_idmap.
Currently we still pass around the plain namespace that was attached to a
mount. This is in general pretty convenient but it makes it easy to
conflate namespaces that are relevant on the filesystem with namespaces
that are relevent on the mount level. Especially for non-vfs developers
without detailed knowledge in this area this can be a potential source for
bugs.
Once the conversion to struct mnt_idmap is done all helpers down to the
really low-level helpers will take a struct mnt_idmap argument instead of
two namespace arguments. This way it becomes impossible to conflate the two
eliminating the possibility of any bugs. All of the vfs and all filesystems
only operate on struct mnt_idmap.
Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Convert to struct mnt_idmap.
Last cycle we merged the necessary infrastructure in
256c8aed2b ("fs: introduce dedicated idmap type for mounts").
This is just the conversion to struct mnt_idmap.
Currently we still pass around the plain namespace that was attached to a
mount. This is in general pretty convenient but it makes it easy to
conflate namespaces that are relevant on the filesystem with namespaces
that are relevent on the mount level. Especially for non-vfs developers
without detailed knowledge in this area this can be a potential source for
bugs.
Once the conversion to struct mnt_idmap is done all helpers down to the
really low-level helpers will take a struct mnt_idmap argument instead of
two namespace arguments. This way it becomes impossible to conflate the two
eliminating the possibility of any bugs. All of the vfs and all filesystems
only operate on struct mnt_idmap.
Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Convert to struct mnt_idmap.
Last cycle we merged the necessary infrastructure in
256c8aed2b ("fs: introduce dedicated idmap type for mounts").
This is just the conversion to struct mnt_idmap.
Currently we still pass around the plain namespace that was attached to a
mount. This is in general pretty convenient but it makes it easy to
conflate namespaces that are relevant on the filesystem with namespaces
that are relevent on the mount level. Especially for non-vfs developers
without detailed knowledge in this area this can be a potential source for
bugs.
Once the conversion to struct mnt_idmap is done all helpers down to the
really low-level helpers will take a struct mnt_idmap argument instead of
two namespace arguments. This way it becomes impossible to conflate the two
eliminating the possibility of any bugs. All of the vfs and all filesystems
only operate on struct mnt_idmap.
Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Now that the SRCU Kconfig option is unconditionally selected, there is
no longer any point in selecting it. Therefore, remove the "select SRCU"
Kconfig statements.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
bin2c was, as its name implies, introduced to convert a binary file to
C code.
However, I did not see any good reason ever for using this tool because
using the .incbin directive is much faster, and often results in simpler
code.
Most of the uses of bin2c have been killed, for example:
- 13610aa908 ("kernel/configs: use .incbin directive to embed config_data.gz")
- 4c0f032d49 ("s390/purgatory: Omit use of bin2c")
security/tomoyo/Makefile has even less reason for using bin2c because
the policy files are text data. So, sed is enough for converting them
to C string literals, and what is nicer, generates human-readable
builtin-policy.h.
This is the last user of bin2c. After this commit lands, bin2c will be
removed.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
[penguin-kernel: Update sed script to also escape backslash and quote ]
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
If *.conf.default is updated, builtin-policy.h should be rebuilt,
but this does not work when compiled with O= option.
[Without this commit]
$ touch security/tomoyo/policy/exception_policy.conf.default
$ make O=/tmp security/tomoyo/
make[1]: Entering directory '/tmp'
GEN Makefile
CALL /home/masahiro/ref/linux/scripts/checksyscalls.sh
DESCEND objtool
make[1]: Leaving directory '/tmp'
[With this commit]
$ touch security/tomoyo/policy/exception_policy.conf.default
$ make O=/tmp security/tomoyo/
make[1]: Entering directory '/tmp'
GEN Makefile
CALL /home/masahiro/ref/linux/scripts/checksyscalls.sh
DESCEND objtool
POLICY security/tomoyo/builtin-policy.h
CC security/tomoyo/common.o
AR security/tomoyo/built-in.a
make[1]: Leaving directory '/tmp'
$(srctree)/ is essential because $(wildcard ) does not follow VPATH.
Fixes: f02dee2d14 ("tomoyo: Do not generate empty policy files")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCY6HAHgAKCRCRxhvAZXjc
ou/mAQDDaks5QRtDT88OAI1fMWhSz9IZHsxCOeNQ1hdvWvKZkQD+LCbjmRFG3aB4
Br7ZjHSmVDug/pQEV6FVDg4LpwYZUQo=
=Sab+
-----END PGP SIGNATURE-----
Merge tag 'fs.vfsuid.ima.v6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping
Pull vfsuid cleanup from Christian Brauner:
"This moves the ima specific vfs{g,u}id_t comparison helpers out of the
header and into the one file in ima where they are used.
We shouldn't incentivize people to use them by placing them into the
header. As discussed and suggested by Linus in [1] let's just define
them locally in the one file in ima where they are used"
Link: https://lore.kernel.org/lkml/CAHk-=wj4BpEwUd=OkTv1F9uykvSrsBNZJVHMp+p_+e2kiV71_A@mail.gmail.com [1]
* tag 'fs.vfsuid.ima.v6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping:
mnt_idmapping: move ima-only helpers to ima
A bad bug in clang's implementation of -fzero-call-used-regs can result
in NULL pointer dereferences (see the links above the check for more
information). Restrict CONFIG_CC_HAS_ZERO_CALL_USED_REGS to either a
supported GCC version or a clang newer than 15.0.6, which will catch
both a theoretical 15.0.7 and the upcoming 16.0.0, which will both have
the bug fixed.
Cc: stable@vger.kernel.org # v5.15+
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20221214232602.4118147-1-nathan@kernel.org
LoadPin only enforces the read-only origin of kernel file reads. Whether
or not it was a partial read isn't important. Remove the overly
conservative checks so that things like partial firmware reads will
succeed (i.e. reading a firmware header).
Fixes: 2039bda1fa ("LSM: Add "contents" flag to kernel_read_file hook")
Cc: Paul Moore <paul@paul-moore.com>
Cc: James Morris <jmorris@namei.org>
Cc: "Serge E. Hallyn" <serge@hallyn.com>
Cc: linux-security-module@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Serge Hallyn <serge@hallyn.com>
Tested-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://lore.kernel.org/r/20221209195453.never.494-kees@kernel.org
- switch to zstd compression for profile raw data
+ Cleanups
- Simplify obtain the newest label on a cred
- remove useless static inline functions
- compute permission conversion on policy unpack
- refactor code to share common permissins
- refactor unpack to group policy backwards compatiblity code
- add __init annotation to aa_{setup/teardown}_dfa_engine()
+ Bug Fixes
- fix a memleak in
- multi_transaction_new()
- free_ruleset()
- unpack_profile()
- alloc_ns()
- fix lockdep warning when removing a namespace
- fix regression in stacking due to label flags
- fix loading of child before parent
- fix kernel-doc comments that differ from fns
- fix spelling errors in comments
- store return value of unpack_perms_table() to signed variable
-----BEGIN PGP SIGNATURE-----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=6GKy
-----END PGP SIGNATURE-----
Merge tag 'apparmor-pr-2022-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor
Pull apparmor updates from John Johansen:
"Features:
- switch to zstd compression for profile raw data
Cleanups:
- simplify obtaining the newest label on a cred
- remove useless static inline functions
- compute permission conversion on policy unpack
- refactor code to share common permissins
- refactor unpack to group policy backwards compatiblity code
- add __init annotation to aa_{setup/teardown}_dfa_engine()
Bug Fixes:
- fix a memleak in
- multi_transaction_new()
- free_ruleset()
- unpack_profile()
- alloc_ns()
- fix lockdep warning when removing a namespace
- fix regression in stacking due to label flags
- fix loading of child before parent
- fix kernel-doc comments that differ from fns
- fix spelling errors in comments
- store return value of unpack_perms_table() to signed variable"
* tag 'apparmor-pr-2022-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor: (64 commits)
apparmor: Fix uninitialized symbol 'array_size' in policy_unpack_test.c
apparmor: Add __init annotation to aa_{setup/teardown}_dfa_engine()
apparmor: Fix memleak in alloc_ns()
apparmor: Fix memleak issue in unpack_profile()
apparmor: fix a memleak in free_ruleset()
apparmor: Fix spelling of function name in comment block
apparmor: Use pointer to struct aa_label for lbs_cred
AppArmor: Fix kernel-doc
LSM: Fix kernel-doc
AppArmor: Fix kernel-doc
apparmor: Fix loading of child before parent
apparmor: refactor code that alloc null profiles
apparmor: fix obsoleted comments for aa_getprocattr() and audit_resource()
apparmor: remove useless static inline functions
apparmor: Fix unpack_profile() warn: passing zero to 'ERR_PTR'
apparmor: fix uninitialize table variable in error in unpack_trans_table
apparmor: store return value of unpack_perms_table() to signed variable
apparmor: Fix kunit test for out of bounds array
apparmor: Fix decompression of rawdata for read back to userspace
apparmor: Fix undefined references to zstd_ symbols
...
-----BEGIN PGP SIGNATURE-----
iIoEABYIADIWIQQdXVVFGN5XqKr1Hj7LwZzRsCrn5QUCY5ekGxQcem9oYXJAbGlu
dXguaWJtLmNvbQAKCRDLwZzRsCrn5QLyAQC+olx4ImpAgFXoeYaZOiZr08ziAIlb
hQ8rae6hFWecCgD/SZmDtOQ39UGobWbpj+GqwZvx8iJwKPCu9YzQ7Rjo7QE=
=MywK
-----END PGP SIGNATURE-----
Merge tag 'integrity-v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity
Pull integrity updates from Mimi Zohar:
"Aside from the one cleanup, the other changes are bug fixes:
Cleanup:
- Include missing iMac Pro 2017 in list of Macs with T2 security chip
Bug fixes:
- Improper instantiation of "encrypted" keys with user provided data
- Not handling delay in updating LSM label based IMA policy rules
(-ESTALE)
- IMA and integrity memory leaks on error paths
- CONFIG_IMA_DEFAULT_HASH_SM3 hash algorithm renamed"
* tag 'integrity-v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity:
ima: Fix hash dependency to correct algorithm
ima: Fix misuse of dereference of pointer in template_desc_init_fields()
integrity: Fix memory leakage in keyring allocation error path
ima: Fix memory leak in __ima_inode_hash()
ima: Handle -ESTALE returned by ima_filter_rule_match()
ima: Simplify ima_lsm_copy_rule
ima: Fix a potential NULL pointer access in ima_restore_measurement_list
efi: Add iMac Pro 2017 to uefi skip cert quirk
KEYS: encrypted: fix key instantiation with user-provided data
-----BEGIN PGP SIGNATURE-----
iQJIBAABCAAyFiEES0KozwfymdVUl37v6iDy2pc3iXMFAmOXmxkUHHBhdWxAcGF1
bC1tb29yZS5jb20ACgkQ6iDy2pc3iXMPXg//cxfYC8lRtVpuGNCZWDietSiHzpzu
+qFntaTplvybJMQX0HfgNee5cTBZM+W5mp1BHRcZInvV5LRhyrVtgsxDBifutE4x
LyUJAw5SkiPdRC+XLDIRLKiZCobFBLVs2zO+qibIqsyR60pFjU6WXBLbJfidXBFR
yWudDbLU0YhQJCHdNHNqnHCgqrEculxn6q3QPvm/DX0xzBwkFHSSYBkGNvHW2ZTA
lKNreEOwEk5DTLIKjP4bJ72ixp0xbshw5CXuxtwB/12/4h8QbWbJVQLlIeZrTLmp
zQXQLJ3pCqKJ2OUCgMDK+wmkvLezd80BV3Due7KX0pT0YRDygoh5QEpZ5/8k8eG7
prxToh2gJWk2htfJF6kgMpAh9Jqewcke4BysbYVM/427OPZYwQqLDZDGOzbtT6pl
FYF+adN9wwkAErnHnPlzYipUEpBWurbjtsV8KFWNERoZ4YmzfSPEisRqGIHDGRws
bTyq/7qs5FXkb1zULELj8V+S2ULsmxPqsxJ63p9di54Uo9lHK0I+0IUtajGDdfze
psAasa9DD/oH2PAbSmpQ5Xo9XyfHRXsVuz1twEmEA14ML0m4wHbNWVHaK0aaXVdG
kJKSDSjMsiV+GiwNo7ISJ4pVdUpnMI/iZSghFfV28cJslNhJDeaREHaE/Wtn1/xF
/bCVmEfS16UoJsQ=
=klFk
-----END PGP SIGNATURE-----
Merge tag 'lsm-pr-20221212' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm
Pull lsm updates from Paul Moore:
- Improve the error handling in the device cgroup such that memory
allocation failures when updating the access policy do not
potentially alter the policy.
- Some minor fixes to reiserfs to ensure that it properly releases
LSM-related xattr values.
- Update the security_socket_getpeersec_stream() LSM hook to take
sockptr_t values.
Previously the net/BPF folks updated the getsockopt code in the
network stack to leverage the sockptr_t type to make it easier to
pass both kernel and __user pointers, but unfortunately when they did
so they didn't convert the LSM hook.
While there was/is no immediate risk by not converting the LSM hook,
it seems like this is a mistake waiting to happen so this patch
proactively does the LSM hook conversion.
- Convert vfs_getxattr_alloc() to return an int instead of a ssize_t
and cleanup the callers. Internally the function was never going to
return anything larger than an int and the callers were doing some
very odd things casting the return value; this patch fixes all that
and helps bring a bit of sanity to vfs_getxattr_alloc() and its
callers.
- More verbose, and helpful, LSM debug output when the system is booted
with "lsm.debug" on the command line. There are examples in the
commit description, but the quick summary is that this patch provides
better information about which LSMs are enabled and the ordering in
which they are processed.
- General comment and kernel-doc fixes and cleanups.
* tag 'lsm-pr-20221212' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm:
lsm: Fix description of fs_context_parse_param
lsm: Add/fix return values in lsm_hooks.h and fix formatting
lsm: Clarify documentation of vm_enough_memory hook
reiserfs: Add missing calls to reiserfs_security_free()
lsm,fs: fix vfs_getxattr_alloc() return type and caller error paths
device_cgroup: Roll back to original exceptions after copy failure
LSM: Better reporting of actual LSMs at boot
lsm: make security_socket_getpeersec_stream() sockptr_t safe
audit: Fix some kernel-doc warnings
lsm: remove obsoleted comments for security hooks
fs: edit a comment made in bad taste
-----BEGIN PGP SIGNATURE-----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=4AGR
-----END PGP SIGNATURE-----
Merge tag 'selinux-pr-20221212' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux
Pull selinux updates from Paul Moore:
"Two SELinux patches: one increases the sleep time on deprecated
functionality, and one removes the indirect calls in the sidtab
context conversion code"
* tag 'selinux-pr-20221212' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
selinux: remove the sidtab context conversion indirect calls
selinux: increase the deprecation sleep for checkreqprot and runtime disable
-----BEGIN PGP SIGNATURE-----
iIYEABYIAC4WIQSVyBthFV4iTW/VU1/l49DojIL20gUCY5b27RAcbWljQGRpZ2lr
b2QubmV0AAoJEOXj0OiMgvbSg9YA/0K10H+VsGt1+qqR4+w9SM7SFzbgszrV3Yw9
rwiPgaPVAP9rxXPr2bD2hAk7/Lv9LeJ2kfM9RzMErP1A6UsC5YVbDA==
=mAG7
-----END PGP SIGNATURE-----
Merge tag 'landlock-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux
Pull landlock updates from Mickaël Salaün:
"This adds file truncation support to Landlock, contributed by Günther
Noack. As described by Günther [1], the goal of these patches is to
work towards a more complete coverage of file system operations that
are restrictable with Landlock.
The known set of currently unsupported file system operations in
Landlock is described at [2]. Out of the operations listed there,
truncate is the only one that modifies file contents, so these patches
should make it possible to prevent the direct modification of file
contents with Landlock.
The new LANDLOCK_ACCESS_FS_TRUNCATE access right covers both the
truncate(2) and ftruncate(2) families of syscalls, as well as open(2)
with the O_TRUNC flag. This includes usages of creat() in the case
where existing regular files are overwritten.
Additionally, this introduces a new Landlock security blob associated
with opened files, to track the available Landlock access rights at
the time of opening the file. This is in line with Unix's general
approach of checking the read and write permissions during open(), and
associating this previously checked authorization with the opened
file. An ongoing patch documents this use case [3].
In order to treat truncate(2) and ftruncate(2) calls differently in an
LSM hook, we split apart the existing security_path_truncate hook into
security_path_truncate (for truncation by path) and
security_file_truncate (for truncation of previously opened files)"
Link: https://lore.kernel.org/r/20221018182216.301684-1-gnoack3000@gmail.com [1]
Link: https://www.kernel.org/doc/html/v6.1/userspace-api/landlock.html#filesystem-flags [2]
Link: https://lore.kernel.org/r/20221209193813.972012-1-mic@digikod.net [3]
* tag 'landlock-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux:
samples/landlock: Document best-effort approach for LANDLOCK_ACCESS_FS_REFER
landlock: Document Landlock's file truncation support
samples/landlock: Extend sample tool to support LANDLOCK_ACCESS_FS_TRUNCATE
selftests/landlock: Test ftruncate on FDs created by memfd_create(2)
selftests/landlock: Test FD passing from restricted to unrestricted processes
selftests/landlock: Locally define __maybe_unused
selftests/landlock: Test open() and ftruncate() in multiple scenarios
selftests/landlock: Test file truncation support
landlock: Support file truncation
landlock: Document init_layer_masks() helper
landlock: Refactor check_access_path_dual() into is_access_to_paths_allowed()
security: Create file_truncate hook from path_truncate hook
The vfs{g,u}id_{gt,lt}_* helpers are currently not needed outside of
ima and we shouldn't incentivize people to use them by placing them into
the header. Let's just define them locally in the one file in ima where
they are used.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCY5bspgAKCRCRxhvAZXjc
opEWAQDpF5rnZn1vv4/uOTij9ztcA4yLxu/Q19CdqBaoHlWZ9AD/d3eecee3bh5h
iPHtlUK5/VspfD9LPpdc5ZbPCdZ2pA4=
=t6NN
-----END PGP SIGNATURE-----
Merge tag 'fs.vfsuid.conversion.v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping
Pull vfsuid updates from Christian Brauner:
"Last cycle we introduced the vfs{g,u}id_t types and associated helpers
to gain type safety when dealing with idmapped mounts. That initial
work already converted a lot of places over but there were still some
left,
This converts all remaining places that still make use of non-type
safe idmapping helpers to rely on the new type safe vfs{g,u}id based
helpers.
Afterwards it removes all the old non-type safe helpers"
* tag 'fs.vfsuid.conversion.v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping:
fs: remove unused idmapping helpers
ovl: port to vfs{g,u}id_t and associated helpers
fuse: port to vfs{g,u}id_t and associated helpers
ima: use type safe idmapping helpers
apparmor: use type safe idmapping helpers
caps: use type safe idmapping helpers
fs: use type safe idmapping helpers
mnt_idmapping: add missing helpers
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCY5bwTgAKCRCRxhvAZXjc
ovd2AQCK00NAtGjQCjQPQGyTa4GAPqvWgq1ef0lnhv+TL5US5gD9FncQ8UofeMXt
pBfjtAD6ettTPCTxUQfnTwWEU4rc7Qg=
=27Wm
-----END PGP SIGNATURE-----
Merge tag 'fs.acl.rework.v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping
Pull VFS acl updates from Christian Brauner:
"This contains the work that builds a dedicated vfs posix acl api.
The origins of this work trace back to v5.19 but it took quite a while
to understand the various filesystem specific implementations in
sufficient detail and also come up with an acceptable solution.
As we discussed and seen multiple times the current state of how posix
acls are handled isn't nice and comes with a lot of problems: The
current way of handling posix acls via the generic xattr api is error
prone, hard to maintain, and type unsafe for the vfs until we call
into the filesystem's dedicated get and set inode operations.
It is already the case that posix acls are special-cased to death all
the way through the vfs. There are an uncounted number of hacks that
operate on the uapi posix acl struct instead of the dedicated vfs
struct posix_acl. And the vfs must be involved in order to interpret
and fixup posix acls before storing them to the backing store, caching
them, reporting them to userspace, or for permission checking.
Currently a range of hacks and duct tape exist to make this work. As
with most things this is really no ones fault it's just something that
happened over time. But the code is hard to understand and difficult
to maintain and one is constantly at risk of introducing bugs and
regressions when having to touch it.
Instead of continuing to hack posix acls through the xattr handlers
this series builds a dedicated posix acl api solely around the get and
set inode operations.
Going forward, the vfs_get_acl(), vfs_remove_acl(), and vfs_set_acl()
helpers must be used in order to interact with posix acls. They
operate directly on the vfs internal struct posix_acl instead of
abusing the uapi posix acl struct as we currently do. In the end this
removes all of the hackiness, makes the codepaths easier to maintain,
and gets us type safety.
This series passes the LTP and xfstests suites without any
regressions. For xfstests the following combinations were tested:
- xfs
- ext4
- btrfs
- overlayfs
- overlayfs on top of idmapped mounts
- orangefs
- (limited) cifs
There's more simplifications for posix acls that we can make in the
future if the basic api has made it.
A few implementation details:
- The series makes sure to retain exactly the same security and
integrity module permission checks. Especially for the integrity
modules this api is a win because right now they convert the uapi
posix acl struct passed to them via a void pointer into the vfs
struct posix_acl format to perform permission checking on the mode.
There's a new dedicated security hook for setting posix acls which
passes the vfs struct posix_acl not a void pointer. Basing checking
on the posix acl stored in the uapi format is really unreliable.
The vfs currently hacks around directly in the uapi struct storing
values that frankly the security and integrity modules can't
correctly interpret as evidenced by bugs we reported and fixed in
this area. It's not necessarily even their fault it's just that the
format we provide to them is sub optimal.
- Some filesystems like 9p and cifs need access to the dentry in
order to get and set posix acls which is why they either only
partially or not even at all implement get and set inode
operations. For example, cifs allows setxattr() and getxattr()
operations but doesn't allow permission checking based on posix
acls because it can't implement a get acl inode operation.
Thus, this patch series updates the set acl inode operation to take
a dentry instead of an inode argument. However, for the get acl
inode operation we can't do this as the old get acl method is
called in e.g., generic_permission() and inode_permission(). These
helpers in turn are called in various filesystem's permission inode
operation. So passing a dentry argument to the old get acl inode
operation would amount to passing a dentry to the permission inode
operation which we shouldn't and probably can't do.
So instead of extending the existing inode operation Christoph
suggested to add a new one. He also requested to ensure that the
get and set acl inode operation taking a dentry are consistently
named. So for this version the old get acl operation is renamed to
->get_inode_acl() and a new ->get_acl() inode operation taking a
dentry is added. With this we can give both 9p and cifs get and set
acl inode operations and in turn remove their complex custom posix
xattr handlers.
In the future I hope to get rid of the inode method duplication but
it isn't like we have never had this situation. Readdir is just one
example. And frankly, the overall gain in type safety and the more
pleasant api wise are simply too big of a benefit to not accept
this duplication for a while.
- We've done a full audit of every codepaths using variant of the
current generic xattr api to get and set posix acls and
surprisingly it isn't that many places. There's of course always a
chance that we might have missed some and if so I'm sure we'll find
them soon enough.
The crucial codepaths to be converted are obviously stacking
filesystems such as ecryptfs and overlayfs.
For a list of all callers currently using generic xattr api helpers
see [2] including comments whether they support posix acls or not.
- The old vfs generic posix acl infrastructure doesn't obey the
create and replace semantics promised on the setxattr(2) manpage.
This patch series doesn't address this. It really is something we
should revisit later though.
The patches are roughly organized as follows:
(1) Change existing set acl inode operation to take a dentry
argument (Intended to be a non-functional change)
(2) Rename existing get acl method (Intended to be a non-functional
change)
(3) Implement get and set acl inode operations for filesystems that
couldn't implement one before because of the missing dentry.
That's mostly 9p and cifs (Intended to be a non-functional
change)
(4) Build posix acl api, i.e., add vfs_get_acl(), vfs_remove_acl(),
and vfs_set_acl() including security and integrity hooks
(Intended to be a non-functional change)
(5) Implement get and set acl inode operations for stacking
filesystems (Intended to be a non-functional change)
(6) Switch posix acl handling in stacking filesystems to new posix
acl api now that all filesystems it can stack upon support it.
(7) Switch vfs to new posix acl api (semantical change)
(8) Remove all now unused helpers
(9) Additional regression fixes reported after we merged this into
linux-next
Thanks to Seth for a lot of good discussion around this and
encouragement and input from Christoph"
* tag 'fs.acl.rework.v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping: (36 commits)
posix_acl: Fix the type of sentinel in get_acl
orangefs: fix mode handling
ovl: call posix_acl_release() after error checking
evm: remove dead code in evm_inode_set_acl()
cifs: check whether acl is valid early
acl: make vfs_posix_acl_to_xattr() static
acl: remove a slew of now unused helpers
9p: use stub posix acl handlers
cifs: use stub posix acl handlers
ovl: use stub posix acl handlers
ecryptfs: use stub posix acl handlers
evm: remove evm_xattr_acl_change()
xattr: use posix acl api
ovl: use posix acl api
ovl: implement set acl method
ovl: implement get acl method
ecryptfs: implement set acl method
ecryptfs: implement get acl method
ksmbd: use vfs_remove_acl()
acl: add vfs_remove_acl()
...
direction misannotations and (hopefully) preventing
more of the same for the future.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-----BEGIN PGP SIGNATURE-----
iHQEABYIAB0WIQQqUNBr3gm4hGXdBJlZ7Krx/gZQ6wUCY5ZzQAAKCRBZ7Krx/gZQ
65RZAP4nTkvOn0NZLVFkuGOx8pgJelXAvrteyAuecVL8V6CR4AD40qCVY51PJp8N
MzwiRTeqnGDxTTF7mgd//IB6hoatAA==
=bcvF
-----END PGP SIGNATURE-----
Merge tag 'pull-iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull iov_iter updates from Al Viro:
"iov_iter work; most of that is about getting rid of direction
misannotations and (hopefully) preventing more of the same for the
future"
* tag 'pull-iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
use less confusing names for iov_iter direction initializers
iov_iter: saner checks for attempt to copy to/from iterator
[xen] fix "direction" argument of iov_iter_kvec()
[vhost] fix 'direction' argument of iov_iter_{init,bvec}()
[target] fix iov_iter_bvec() "direction" argument
[s390] memcpy_real(): WRITE is "data source", not destination...
[s390] zcore: WRITE is "data source", not destination...
[infiniband] READ is "data destination", not source...
[fsi] WRITE is "data source", not destination...
[s390] copy_oldmem_kernel() - WRITE is "data source", not destination
csum_and_copy_to_iter(): handle ITER_DISCARD
get rid of unlikely() on page_copy_sane() calls
This KUnit next update for Linux 6.2-rc1 consists of several enhancements,
fixes, clean-ups, documentation updates, improvements to logging and KTAP
compliance of KUnit test output:
- log numbers in decimal and hex
- parse KTAP compliant test output
- allow conditionally exposing static symbols to tests
when KUNIT is enabled
- make static symbols visible during kunit testing
- clean-ups to remove unused structure definition
-----BEGIN PGP SIGNATURE-----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=UQNn
-----END PGP SIGNATURE-----
Merge tag 'linux-kselftest-kunit-next-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull KUnit updates from Shuah Khan:
"Several enhancements, fixes, clean-ups, documentation updates,
improvements to logging and KTAP compliance of KUnit test output:
- log numbers in decimal and hex
- parse KTAP compliant test output
- allow conditionally exposing static symbols to tests when KUNIT is
enabled
- make static symbols visible during kunit testing
- clean-ups to remove unused structure definition"
* tag 'linux-kselftest-kunit-next-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (29 commits)
Documentation: dev-tools: Clarify requirements for result description
apparmor: test: make static symbols visible during kunit testing
kunit: add macro to allow conditionally exposing static symbols to tests
kunit: tool: make parser preserve whitespace when printing test log
Documentation: kunit: Fix "How Do I Use This" / "Next Steps" sections
kunit: tool: don't include KTAP headers and the like in the test log
kunit: improve KTAP compliance of KUnit test output
kunit: tool: parse KTAP compliant test output
mm: slub: test: Use the kunit_get_current_test() function
kunit: Use the static key when retrieving the current test
kunit: Provide a static key to check if KUnit is actively running tests
kunit: tool: make --json do nothing if --raw_ouput is set
kunit: tool: tweak error message when no KTAP found
kunit: remove KUNIT_INIT_MEM_ASSERTION macro
Documentation: kunit: Remove redundant 'tips.rst' page
Documentation: KUnit: reword description of assertions
Documentation: KUnit: make usage.rst a superset of tips.rst, remove duplication
kunit: eliminate KUNIT_INIT_*_ASSERT_STRUCT macros
kunit: tool: remove redundant file.close() call in unit test
kunit: tool: unit tests all check parser errors, standardize formatting a bit
...
Use macros, VISIBLE_IF_KUNIT and EXPORT_SYMBOL_IF_KUNIT, to allow
static symbols to be conditionally set to be visible during
apparmor_policy_unpack_test, which removes the need to include the testing
file in the implementation file.
Change the namespace of the symbols that are now conditionally visible (by
adding the prefix aa_) to avoid confusion with symbols of the same name.
Allow the test to be built as a module and namespace the module name from
policy_unpack_test to apparmor_policy_unpack_test to improve clarity of
the module name.
Provide an example of how static symbols can be dealt with in testing.
Signed-off-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Acked-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
TEE trusted keys support depends on registered shared memory support
since the key buffers are needed to be registered with OP-TEE. So make
that dependency explicit to not register trusted keys support if
underlying implementation doesn't support registered shared memory.
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Tested-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Commit d2825fa936 ("crypto: sm3,sm4 - move into crypto directory") moves
the SM3 and SM4 stand-alone library and the algorithm implementation for
the Crypto API into the same directory, and the corresponding relationship
of Kconfig is modified, CONFIG_CRYPTO_SM3/4 corresponds to the stand-alone
library of SM3/4, and CONFIG_CRYPTO_SM3/4_GENERIC corresponds to the
algorithm implementation for the Crypto API. Therefore, it is necessary
for this module to depend on the correct algorithm.
Fixes: d2825fa936 ("crypto: sm3,sm4 - move into crypto directory")
Cc: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: stable@vger.kernel.org # v5.19+
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
READ/WRITE proved to be actively confusing - the meanings are
"data destination, as used with read(2)" and "data source, as
used with write(2)", but people keep interpreting those as
"we read data from it" and "we write data to it", i.e. exactly
the wrong way.
Call them ITER_DEST and ITER_SOURCE - at least that is harder
to misinterpret...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
The vfs_getxattr_alloc() function currently returns a ssize_t value
despite the fact that it only uses int values internally for return
values. Fix this by converting vfs_getxattr_alloc() to return an
int type and adjust the callers as necessary. As part of these
caller modifications, some of the callers are fixed to properly free
the xattr value buffer on both success and failure to ensure that
memory is not leaked in the failure case.
Reviewed-by: Serge Hallyn <serge@hallyn.com>
Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
When add the 'a *:* rwm' entry to devcgroup A's whitelist, at first A's
exceptions will be cleaned and A's behavior is changed to
DEVCG_DEFAULT_ALLOW. Then parent's exceptions will be copyed to A's
whitelist. If copy failure occurs, just return leaving A to grant
permissions to all devices. And A may grant more permissions than
parent.
Backup A's whitelist and recover original exceptions after copy
failure.
Cc: stable@vger.kernel.org
Fixes: 4cef7299b4 ("device_cgroup: add proper checking when changing default behavior")
Signed-off-by: Wang Weiyang <wangweiyang2@huawei.com>
Reviewed-by: Aristeu Rozanski <aris@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
The input parameter @fields is type of struct ima_template_field ***, so
when allocates array memory for @fields, the size of element should be
sizeof(**field) instead of sizeof(*field).
Actually the original code would not cause any runtime error, but it's
better to make it logically right.
Fixes: adf53a778a ("ima: new templates management mechanism")
Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Reviewed-by: Roberto Sassu <roberto.sassu@huawei.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Key restriction is allocated in integrity_init_keyring(). However, if
keyring allocation failed, it is not freed, causing memory leaks.
Fixes: 2b6aa412ff ("KEYS: Use structure to capture key restriction function and data")
Signed-off-by: GUO Zihua <guozihua@huawei.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
The sidtab conversion code has support for multiple context
conversion routines through the use of function pointers and
indirect calls. However, the reality is that all current users rely
on the same conversion routine: convert_context(). This patch does
away with this extra complexity and replaces the indirect calls
with direct function calls; allowing us to remove a layer of
obfuscation and create cleaner, more maintainable code.
Reviewed-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Commit 4ff09db1b7 ("bpf: net: Change sk_getsockopt() to take the
sockptr_t argument") made it possible to call sk_getsockopt()
with both user and kernel address space buffers through the use of
the sockptr_t type. Unfortunately at the time of conversion the
security_socket_getpeersec_stream() LSM hook was written to only
accept userspace buffers, and in a desire to avoid having to change
the LSM hook the commit author simply passed the sockptr_t's
userspace buffer pointer. Since the only sk_getsockopt() callers
at the time of conversion which used kernel sockptr_t buffers did
not allow SO_PEERSEC, and hence the
security_socket_getpeersec_stream() hook, this was acceptable but
also very fragile as future changes presented the possibility of
silently passing kernel space pointers to the LSM hook.
There are several ways to protect against this, including careful
code review of future commits, but since relying on code review to
catch bugs is a recipe for disaster and the upstream eBPF maintainer
is "strongly against defensive programming", this patch updates the
LSM hook, and all of the implementations to support sockptr_t and
safely handle both user and kernel space buffers.
Acked-by: Casey Schaufler <casey@schaufler-ca.com>
Acked-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
