path: root/security
diff options
authorLakshmi Ramasubramanian <>2021-02-04 09:49:51 -0800
committerMimi Zohar <>2021-02-10 15:49:38 -0500
commitf31e3386a4e92ba6eda7328cb508462956c94c64 (patch)
treed98da3e377fd2f3cfd48683f66c7e57246f70700 /security
parent6d14c6517885fa68524238787420511b87d671df (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 <> Suggested-by: Tyler Hicks <> Reviewed-by: Thiago Jung Bauermann <> Reviewed-by: Tyler Hicks <> Fixes: 7b8589cc29e7 ("ima: on soft reboot, save the measurement list") Signed-off-by: Mimi Zohar <>
Diffstat (limited to 'security')
1 files changed, 2 insertions, 0 deletions
diff --git a/security/integrity/ima/ima_kexec.c b/security/integrity/ima/ima_kexec.c
index 206ddcaa5c67..e29bea3dd4cc 100644
--- a/security/integrity/ima/ima_kexec.c
+++ b/security/integrity/ima/ima_kexec.c
@@ -129,6 +129,8 @@ void ima_add_kexec_buffer(struct kimage *image)
+ image->ima_buffer = kexec_buffer;
pr_debug("kexec measurement buffer for the loaded kernel at 0x%lx.\n",