Since 54c7a8916a88 ("initramfs: free initrd memory if opening
/initrd.image fails"), the kernel has unconditionally attempted to free
the initrd even if it doesn't exist. In the non-existent case this
causes a boot-time splat if CONFIG_DEBUG_VIRTUAL is enabled due to a
call to virt_to_phys() with a NULL address.
Instead we should check that the initrd actually exists and only attempt
to free it if it does.
Fixes: 54c7a8916a88 ("initramfs: free initrd memory if opening /initrd.image
fails")
Reported-by: Mark Rutland <mark.rutl...@arm.com>
Tested-by: Mark Rutland <mark.rutl...@arm.com>
Signed-off-by: Steven Price <steven.pr...@arm.com>
---
init/initramfs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/init/initramfs.c b/init/initramfs.c
index 435a428c2af1..178130fd61c2 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -669,7 +669,7 @@ static int __init populate_rootfs(void)
* If the initrd region is overlapped with crashkernel reserved region,
* free only memory that is not part of crashkernel region.
*/
- if (!do_retain_initrd && !kexec_free_initrd())
+ if (!do_retain_initrd && initrd_start && !kexec_free_initrd())
free_initrd_mem(initrd_start, initrd_end);
initrd_start = 0;
initrd_end = 0;
--
2.20.1
