linux.git/security/integrity/ima/ima.h, branch v4.10.4

ima: fix ima_d_path() possible race with rename

2017-03-12T05:44:10+00:00

commit bc15ed663e7e53ee4dc3e60f8d09c93a0528c694 upstream.

On failure to return a pathname from ima_d_path(), a pointer to
dname is returned, which is subsequently used in the IMA measurement
list, the IMA audit records, and other audit logging.  Saving the
pointer to dname for later use has the potential to race with rename.

Intead of returning a pointer to dname on failure, this patch returns
a pointer to a copy of the filename.

Reported-by: Al Viro 
Signed-off-by: Mimi Zohar 
Signed-off-by: Greg Kroah-Hartman

ima: define a canonical binary_runtime_measurements list format

2016-12-20T17:48:45+00:00

The IMA binary_runtime_measurements list is currently in platform native
format.

To allow restoring a measurement list carried across kexec with a
different endianness than the targeted kernel, this patch defines
little-endian as the canonical format.  For big endian systems wanting
to save/restore the measurement list from a system with a different
endianness, a new boot command line parameter named "ima_canonical_fmt"
is defined.

Considerations: use of the "ima_canonical_fmt" boot command line option
will break existing userspace applications on big endian systems
expecting the binary_runtime_measurements list to be in platform native
format.

Link: http://lkml.kernel.org/r/1480554346-29071-10-git-send-email-zohar@linux.vnet.ibm.com
Signed-off-by: Mimi Zohar 
Acked-by: Dmitry Kasatkin 
Cc: Thiago Jung Bauermann 
Cc: "Eric W. Biederman" 
Cc: Andreas Steffen 
Cc: Josh Sklar 
Cc: Dave Young 
Cc: Vivek Goyal 
Cc: Baoquan He 
Cc: Michael Ellerman 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Stewart Smith 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ima: store the builtin/custom template definitions in a list

2016-12-20T17:48:45+00:00

The builtin and single custom templates are currently stored in an
array.  In preparation for being able to restore a measurement list
containing multiple builtin/custom templates, this patch stores the
builtin and custom templates as a linked list.  This will permit
defining more than one custom template per boot.

Link: http://lkml.kernel.org/r/1480554346-29071-8-git-send-email-zohar@linux.vnet.ibm.com
Signed-off-by: Mimi Zohar 
Acked-by: Dmitry Kasatkin 
Cc: Thiago Jung Bauermann 
Cc: "Eric W. Biederman" 
Cc: Andreas Steffen 
Cc: Josh Sklar 
Cc: Dave Young 
Cc: Vivek Goyal 
Cc: Baoquan He 
Cc: Michael Ellerman 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Stewart Smith 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ima: on soft reboot, save the measurement list

2016-12-20T17:48:44+00:00

The TPM PCRs are only reset on a hard reboot.  In order to validate a
TPM's quote after a soft reboot (eg.  kexec -e), the IMA measurement
list of the running kernel must be saved and restored on boot.

This patch uses the kexec buffer passing mechanism to pass the
serialized IMA binary_runtime_measurements to the next kernel.

Link: http://lkml.kernel.org/r/1480554346-29071-7-git-send-email-zohar@linux.vnet.ibm.com
Signed-off-by: Thiago Jung Bauermann 
Signed-off-by: Mimi Zohar 
Acked-by: "Eric W. Biederman" 
Acked-by: Dmitry Kasatkin 
Cc: Andreas Steffen 
Cc: Josh Sklar 
Cc: Dave Young 
Cc: Vivek Goyal 
Cc: Baoquan He 
Cc: Michael Ellerman 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Stewart Smith 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ima: maintain memory size needed for serializing the measurement list

2016-12-20T17:48:44+00:00

In preparation for serializing the binary_runtime_measurements, this
patch maintains the amount of memory required.

Link: http://lkml.kernel.org/r/1480554346-29071-5-git-send-email-zohar@linux.vnet.ibm.com
Signed-off-by: Mimi Zohar 
Acked-by: Dmitry Kasatkin 
Cc: Thiago Jung Bauermann 
Cc: "Eric W. Biederman" 
Cc: Andreas Steffen 
Cc: Josh Sklar 
Cc: Dave Young 
Cc: Vivek Goyal 
Cc: Baoquan He 
Cc: Michael Ellerman 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Stewart Smith 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ima: on soft reboot, restore the measurement list

2016-12-20T17:48:43+00:00

The TPM PCRs are only reset on a hard reboot.  In order to validate a
TPM's quote after a soft reboot (eg.  kexec -e), the IMA measurement
list of the running kernel must be saved and restored on boot.  This
patch restores the measurement list.

Link: http://lkml.kernel.org/r/1480554346-29071-3-git-send-email-zohar@linux.vnet.ibm.com
Signed-off-by: Mimi Zohar 
Acked-by: Dmitry Kasatkin 
Cc: Thiago Jung Bauermann 
Cc: "Eric W. Biederman" 
Cc: Andreas Steffen 
Cc: Josh Sklar 
Cc: Dave Young 
Cc: Vivek Goyal 
Cc: Baoquan He 
Cc: Michael Ellerman 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Stewart Smith 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ima: include pcr for each measurement log entry

2016-06-30T05:14:21+00:00

The IMA measurement list entries include the Kconfig defined PCR value.
This patch defines a new ima_template_entry field for including the PCR
as specified in the policy rule.

Signed-off-by: Eric Richter 
Signed-off-by: Mimi Zohar

ima: extend ima_get_action() to return the policy pcr

2016-06-30T05:14:20+00:00

Different policy rules may extend different PCRs. This patch retrieves
the specific PCR for the matched rule.  Subsequent patches will include
the rule specific PCR in the measurement list and extend the appropriate
PCR.

Signed-off-by: Eric Richter 
Signed-off-by: Mimi Zohar

constify ima_d_path()

2016-03-28T04:47:52+00:00

Signed-off-by: Al Viro

ima: measure and appraise the IMA policy itself

2016-02-21T14:34:22+00:00

Add support for measuring and appraising the IMA policy itself.

Changelog v4:
- use braces on both if/else branches, even if single line on one of the
branches - Dmitry
- Use the id mapping - Dmitry

Signed-off-by: Mimi Zohar 
Acked-by: Petko Manolov 
Acked-by: Dmitry Kasatkin