diff options
| author | Lakshmi Ramasubramanian <[email protected]> | 2021-02-04 09:49:51 -0800 |
|---|---|---|
| committer | Mimi Zohar <[email protected]> | 2021-02-10 15:49:38 -0500 |
| commit | f31e3386a4e92ba6eda7328cb508462956c94c64 (patch) | |
| tree | d98da3e377fd2f3cfd48683f66c7e57246f70700 /include/linux | |
| parent | 6d14c6517885fa68524238787420511b87d671df (diff) | |
ima: Free IMA measurement buffer after kexec syscall
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 <[email protected]>
Suggested-by: Tyler Hicks <[email protected]>
Reviewed-by: Thiago Jung Bauermann <[email protected]>
Reviewed-by: Tyler Hicks <[email protected]>
Fixes: 7b8589cc29e7 ("ima: on soft reboot, save the measurement list")
Signed-off-by: Mimi Zohar <[email protected]>
Diffstat (limited to 'include/linux')
| -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 9e93bef52968..5f61389f5f36 100644 --- a/include/linux/kexec.h +++ b/include/linux/kexec.h @@ -300,6 +300,11 @@ 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 */ |