Hi Greg,
On Mon, May 13, 2019 at 03:06:16PM +1000, Greg Ungerer wrote:
Hi Angelo,
On 12/5/19 5:59 pm, Angelo Dureghello wrote:
Hi all,
resending this in the proper mailing (sent to lkml for error).
Just rebased to master right now, so @ > 5.1.1,
nommu boot works, mmu boot hangs without any message.
Before rebase i was near 5.1-rc1 but lost the log, unfortunately.
I am booting linux passing a ramfs address of a ramfs loaded
in memory from u-boot.
After some investigations, just found this:
- without passing the ramfs, kernel boots.
- with ramfs, adding some low level traces, i get:
5Linux version 5.1.0stmark2-001-09826-gd881126bf3f8-dirty (angelo@box)
(gcc version 5.2.0 (crosstools-sysam-2016.04.16))
#221 Sun May 12 00:31:57 CEST 2019
initrd at 0x47d33000:0x47d85e44
overlap at 1073741889 for chunk 0
overlap at 1073746160 for chunk 0
overlap at 1073746719 for chunk 0
overlap at 1073746720 for chunk 0
overlap at 1073746721 for chunk 0
overlap at 1073746722 for chunk 0
Can you git bisect to find which commit breaks it?
Sure. I bisect-ed.
The offending commit is:
d55535232c3dbde9a523a9d10d68670f5fe5dec3 is the first bad commit
commit d55535232c3dbde9a523a9d10d68670f5fe5dec3
Author: Kees Cook <keescook@xxxxxxxxxxxx>
Date: Fri Apr 19 23:27:05 2019 -0400
random: move rand_initialize() earlier
Right now rand_initialize() is run as an early_initcall(), but it only
depends on timekeeping_init() (for mixing ktime_get_real() into the
pools). However, the call to boot_init_stack_canary() for stack canary
initialization runs earlier, which triggers a warning at boot:
random: get_random_bytes called from start_kernel+0x357/0x548 with crng_init=0
Instead, this moves rand_initialize() to after timekeeping_init(), and moves
canary initialization here as well.
Note that this warning may still remain for machines that do not have
UEFI RNG support (which initializes the RNG pools during setup_arch()),
or for x86 machines without RDRAND (or booting without "random.trust=on"
or CONFIG_RANDOM_TRUST_CPU=y).
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Regards
Greg
Regards,
Angelo
