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Filename Latest commit message Latest commit date
Lakshmi Ramasubramanian 091b409383 ima: Free IMA measurement buffer after kexec syscall
[ Upstream commit f31e3386a4e92ba6eda7328cb508462956c94c64 ]

IMA allocates kernel virtual memory to carry forward the measurement
list, from the current kernel to the next kernel on kexec system call,
in ima_add_kexec_buffer() function.  This buffer is not freed before
completing the kexec system call resulting in memory leak.

Add ima_buffer field in "struct kimage" to store the virtual address
of the buffer allocated for the IMA measurement list.
Free the memory allocated for the IMA measurement list in
kimage_file_post_load_cleanup() function.

Signed-off-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
Suggested-by: Tyler Hicks <tyhicks@linux.microsoft.com>
Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Reviewed-by: Tyler Hicks <tyhicks@linux.microsoft.com>
Fixes: 7b8589cc29 ("ima: on soft reboot, save the measurement list")
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 10:26:25 +01:00
arch
block bsg: free the request before return error code 2021-03-04 10:26:22 +01:00
certs
crypto crypto: ecdh_helper - Ensure 'len >= secret.len' in decode_key() 2021-03-04 10:26:25 +01:00
Documentation
drivers hwrng: timeriomem - Fix cooldown period calculation 2021-03-04 10:26:24 +01:00
fs btrfs: clarify error returns values in __load_free_space_cache 2021-03-04 10:26:24 +01:00
include ima: Free IMA measurement buffer after kexec syscall 2021-03-04 10:26:25 +01:00
init
ipc
kernel ima: Free IMA measurement buffer after kexec syscall 2021-03-04 10:26:25 +01:00
lib
LICENSES
mm
net
samples
scripts
security ima: Free IMA measurement buffer after kexec syscall 2021-03-04 10:26:25 +01:00
sound ASoC: SOF: debug: Fix a potential issue on string buffer termination 2021-03-04 10:26:24 +01:00
tools
usr
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README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.