On Fri, Nov 30, 2018 at 6:51 PM Frank Wunderlich frank-w@public-files.de wrote:
Hi Simon,
after applying these Patch-series i cannot load to any address (fatload). Do i need any additional Patch ("fdt: parse "reserved-memory" for memory reservation" sounds like that). Maybe there should be a fallback if no reservation is defined.
No, you should not need additional patches. The code makes use of "lmb" memory allocation just like the "bootm" code does. The "memory reservation" patch you cited only ensures that memory which is marked as reserved in the fdt cannot be overwritten by load.
If it doesn't work for you at all, the available memory is probably not described correctly. Could you check the values of the following defines (or if they are defined at all): - CONFIG_SYS_SDRAM_BASE - CONFIG_ARM - CONFIG_NR_DRAM_BANKS
I might need to improve the DRAM detection code in v5 (which is still pending as I am working on lmb tests).
Regards, Simon
regards Frank
Gesendet: Samstag, 24. November 2018 um 15:11 Uhr Von: "Simon Goldschmidt" simon.k.r.goldschmidt@gmail.com An: "Tom Rini" trini@konsulko.com, u-boot@lists.denx.de, "Joe Hershberger" joe.hershberger@ni.com Cc: "Alexey Brodkin" Alexey.Brodkin@synopsys.com, "Heinrich Schuchardt" xypron.glpk@gmx.de, "Michal Simek" michal.simek@xilinx.com, "Alexander Graf" agraf@suse.de, "Andrea Barisani" andrea.barisani@f-secure.com Betreff: [U-Boot] [PATCH v4 0/7] Fix CVE-2018-18440 and CVE-2018-18439
This series fixes CVE-2018-18440 ("insufficient boundary checks in filesystem image load") by adding restrictions to the 'load' command and fixes CVE-2018-18439 ("insufficient boundary checks in network image boot") by adding restrictions to the tftp code. The functions from lmb.c are used to setup regions of allowed and reserved memory. Then, the file size to load is checked against these addresses and loading the file is aborted if it would overwrite reserved memory.
The memory reservation code is reused from bootm/image.
Changes in v4:
- fixed invalid 'if' statement without braces in boot_fdt_reserve_region
- removed patch 7 ("net: remove CONFIG_MCAST_TFTP), adapted patch 8
Changes in v3:
- No patch changes, but needed to resend since patman added too many cc addresses that gmail seemed to detect as spam :-(
Changes in v2:
- added code to reserve devicetree reserved-memory in lmb
- added tftp fixes (patches 7 and 8)
- fixed a bug in new function lmb_alloc_addr
Simon Goldschmidt (7): lib: lmb: reserving overlapping regions should fail fdt: parse "reserved-memory" for memory reservation lib: lmb: extend lmb for checks at load time fs: prevent overwriting reserved memory bootm: use new common function lmb_init_and_reserve lmb: remove unused extern declaration tftp: prevent overwriting reserved memory
common/bootm.c | 8 ++---- common/image-fdt.c | 53 +++++++++++++++++++++++++++++------ fs/fs.c | 56 +++++++++++++++++++++++++++++++++++-- include/lmb.h | 7 +++-- lib/lmb.c | 69 ++++++++++++++++++++++++++++++++++++++++++++++ net/tftp.c | 66 ++++++++++++++++++++++++++++++++++++++------ 6 files changed, 231 insertions(+), 28 deletions(-)
-- 2.17.1
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