diff options
| author | Lakshmi Ramasubramanian <nramas@linux.microsoft.com> | 2021-02-04 09:49:51 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-04 09:39:42 +0100 |
| commit | 14145d3ad8841ee5c0621f923e14ef877c160c7b (patch) | |
| tree | 51e053f6117ecbe343d50b9f62e96e555feac2b3 /include | |
| parent | 3911ee3ddf944dbf0cf2894ee701cad61b609697 (diff) | |
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: 7b8589cc29e7 ("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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/kexec.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/kexec.h b/include/linux/kexec.h index 9e4e638fb505..fe9f6f2dd811 100644 --- a/include/linux/kexec.h +++ b/include/linux/kexec.h @@ -260,6 +260,11 @@ struct kimage { /* Information for loading purgatory */ struct purgatory_info purgatory_info; #endif + +#ifdef CONFIG_IMA_KEXEC + /* Virtual address of IMA measurement buffer for kexec syscall */ + void *ima_buffer; +#endif }; /* kexec interface functions */ |