Implement function kimage_file_post_load() to call ima_kexec_post_load()
This ensures the IMA buffer allocated at kexec 'load' is mapped to a
segment in the next loaded Kernel image.
Modify the kexec_file_load() syscall to call kimage_file_post_load() after
the image has been loaded and prepared for kexec. Call the function
kimage_file_post_load() only for kexec soft reboot scenarios and not
for KEXEC_FILE_ON_CRASH scenarios.
Signed-off-by: Tushar Sugandhi <tusharsu@xxxxxxxxxxxxxxxxxxx>
---
kernel/kexec_file.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c
index bf758fd5062c..ee38799ff1a3 100644
--- a/kernel/kexec_file.c
+++ b/kernel/kexec_file.c
@@ -184,6 +184,11 @@ kimage_validate_signature(struct kimage *image)
}
#endif
+void kimage_file_post_load(struct kimage *image)
+{
+ ima_kexec_post_load(image);
+}
+
/*
* In file mode list of segments is prepared by kernel. Copy relevant
* data from user space, do error checking, prepare segment list
@@ -399,6 +404,9 @@ SYSCALL_DEFINE5(kexec_file_load, int, kernel_fd, int, initrd_fd,
kimage_terminate(image);
+ if (!(flags & KEXEC_FILE_ON_CRASH))
+ kimage_file_post_load(image);
+
ret = machine_kexec_post_load(image);
if (ret)
goto out;
--
2.25.1
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