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82979 commits

Author SHA1 Message Date
Michal Simek
2e3c10eea0 xilinx: Remove unused ZYNQ_MAC_IN_EEPROM/ZYNQ_GEM_I2C_MAC_OFFSET entries
The commit ba74bcf3e0 ("xilinx: common: Remove
zynq_board_read_rom_ethaddr()") removed zynq_board_read_rom_ethaddr()
because xlnx,eeprom link via DT chosen node is no longer used. But forget
to remove Kconfig entries which are used by this code only.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/f97451ed33409838efea4071553b6da795cfc578.1669192026.git.michal.simek@amd.com
2022-12-05 08:55:55 +01:00
Michal Simek
f3538a3cbe xilinx: Add option to select SC id instead of DUT id for SC support
Reading MAC address from on board EEPROM requires different type for System
Controller (SC).

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/90bb7cc5463568a690b979f18c8d42556986b46d.1669204122.git.michal.simek@amd.com
2022-12-05 08:55:54 +01:00
Venkatesh Yadav Abbarapu
906e20a613 spi: zynqmp_qspi: Add support for 64-bit read/write
When we pass the 64-bit address to read/write, only lower 32-bit
address is getting updated. Program the upper 32-bit address in the
DMA destination memory address MSBs register, which can handle upto
44-bit destination address.

Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@amd.com>
Link: https://lore.kernel.org/r/20221125104413.26140-1-venkatesh.abbarapu@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
2022-12-05 08:55:54 +01:00
Venkatesh Yadav Abbarapu
31e66aea37 arm64: versal: Enable REMAKE_ELF for mini_ospi/mini_qspi
Enable the config REMAKE_ELF in xilinx_versal_mini_ospi_defconfig
and xilinx_versal_mini_qspi_defconfig which generates u-boot.elf.
This commit a8c281d4b737("Convert CONFIG_REMAKE_ELF to Kconfig")
misses to enable this config in these defconfigs.

Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@amd.com>
Link: https://lore.kernel.org/r/20221125084639.23835-1-venkatesh.abbarapu@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
2022-12-05 08:55:54 +01:00
T Karthik Reddy
a5e770b21c spi: zynqmp_gqspi: Update tapdelay value
The driver was using an incorrect value for GQSPI_LPBK_DLY_ADJ_DLY_1
tapdelay for Versal for frequencies above 100MHz. Change it from 2 to 1
based on the recommended value in IP spec.

Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@amd.com>
Reviewed-by: Dhruva Gole <d-gole@ti.com>
Link: https://lore.kernel.org/r/20221123090451.11409-1-ashok.reddy.soma@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
2022-12-05 08:55:54 +01:00
Lukas Funke
d9efdc7d42 arm64: zynqmp: dynamically mark r5 cores as used
When Linux boot takes over control of the pmu
(by signaling PM_INIT_FINALIZE via ipi), pmu will switch off 'unused'
rpu cores. The Xilinx zynqmp fsbl prevents switching off those cores by
marking rpu cores as 'used' when loading code partitions to those cores.
The current u-boot SPL is missing this behaviour, which results in
halting rpu cores during Linux boot.

This commit mimics the xilinx zynqmp fsbl behavior by marking r5 cores as
used when they are released during boot.

Signed-off-by: Lukas Funke <lukas.funke@weidmueller.com>
Signed-off-by: Lukas Funke <lukas.funke-oss@weidmueller.com>
Link: https://lore.kernel.org/r/20221028121547.26464-2-lukas.funke-oss@weidmueller.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
2022-12-05 08:55:54 +01:00
Andy Chiu
f3558be91e net: xilinx_axi: check PCS/PMA PHY status in setup_phy
Both PCS/PMA PHY and the external PHY need to have a valid link status
in order to have Ethernet traffic. Check and wait this status at
setup_phy() so that we could diagnose if there is a PHY issue.

Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
Reviewed-by: Greentime Hu <greentime.hu@sifive.com>
Link: https://lore.kernel.org/r/20221101035800.912644-3-andy.chiu@sifive.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
2022-12-05 08:55:54 +01:00
Andy Chiu
e23544cffe net: xilinx_axi: add PCS/PMA PHY
If we bridge an external PHY to Xilinx's PCS/PMA PHY and would like to
get and set the real status of the PHY facing the external world. Then
we should phy_connect() to the external PHY instead of the PCS/PMA one.
Thus, we add a pcs-handle DT entry, which have been merged in Linux, and
leave the configuration of it to the driver itself.

Unlike Linux, where the PCS/PMA PHY is managed by phylink, managing the
PCS/PMA PHY is only internal to the driver in U-Boot. The PCS/PMA PHY
pressents only when the phy-mode is configured as SGMII or 1000Base-X,
so it is always 1 Gbps and full-duplex and we may skip passing link
information out.

Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
Reviewed-by: Greentime Hu <greentime.hu@sifive.com>
Link: https://lore.kernel.org/r/20221101035800.912644-2-andy.chiu@sifive.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
2022-12-05 08:55:54 +01:00
Tom Rini
d2c5607edd Pull request for efi-2023-01-rc3
Documentation:
 
 * describe DM firmware needed for j721e_evm
 * describe management of UEFI security data base with eficonfig
 
 UEFI:
 
 * code clean-up for eficonfig command
 * fix handling of DHCP aknowledge
 * correct EFI memory type used for U-Boot code
 * unit test for FatToStr() truncation
 * add an EFI binary to print boot hart ID
 
 Other:
 
 * improve parameter checks in console functions
 * fix variable initialization in blk_get_device_part_str
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Merge tag 'efi-2023-01-rc3' of https://source.denx.de/u-boot/custodians/u-boot-efi

Pull request for efi-2023-01-rc3

Documentation:

* describe DM firmware needed for j721e_evm
* describe management of UEFI security data base with eficonfig

UEFI:

* code clean-up for eficonfig command
* fix handling of DHCP aknowledge
* correct EFI memory type used for U-Boot code
* unit test for FatToStr() truncation
* add an EFI binary to print boot hart ID

Other:

* improve parameter checks in console functions
* fix variable initialization in blk_get_device_part_str
2022-12-04 10:01:48 -05:00
Masahisa Kojima
30124c2bb9 doc: eficonfig: add description for UEFI Secure Boot Configuration
This commits adds the description for the UEFI Secure Boot
Configuration through the eficonfig menu.

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>

Redacted the complete document.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-12-02 19:17:25 +01:00
Masahisa Kojima
140a8959d4 eficonfig: use efi_get_next_variable_name_int()
eficonfig command reads all possible UEFI load options
from 0x0000 to 0xFFFF to construct the menu. This takes too much
time in some environment.
This commit uses efi_get_next_variable_name_int() to read all
existing UEFI load options to significantlly reduce the count of
efi_get_var() call.

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
2022-12-02 19:17:25 +01:00
Masahisa Kojima
3ac026ae46 efi_loader: utility function to check the variable name is "Boot####"
Some commands need to enumerate the existing UEFI load
option variable("Boot####"). This commit transfers some code
from cmd/efidebug.c to lib/efi_loder/, then exposes
efi_varname_is_load_option() function to check whether
the UEFI variable name is "Boot####".

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
2022-12-02 19:17:25 +01:00
Masahisa Kojima
78b1ccc430 eficonfig: use u16_strsize() to get u16 string buffer size
Use u16_strsize() to simplify the u16 string buffer
size calculation.

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
2022-12-02 19:17:25 +01:00
Masahisa Kojima
c67d3c9e23 eficonfig: fix going one directory up issue
The directory name in eficonfig menu entry contains the
'\' separator. strcmp() argument ".." is wrong and one directory
up handling does not work correctly. strcmp() argument must
include '\' separator.

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
2022-12-02 19:17:25 +01:00
Heinrich Schuchardt
7fb73cd999 doc: board: typo GIUD Microchip MPFS Icicle Kit doc
%s/GIUD/GUID/

Fixes: 9e550e1830 ("doc: board: Add Microchip MPFS Icicle Kit doc")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Bin Meng <bmeng@tinylab.org>
2022-12-02 19:17:24 +01:00
Heinrich Schuchardt
1a12796292 efi_loader: don't use EFI_LOADER_DATA internally
EFI_LOADER_DATA/CODE is reserved for EFI applications.
Memory allocated by U-Boot for internal usage should be
EFI_BOOT_SERVICES_DATA or _CODE or EFI_RUNTIME_SERVICES_DATA or _CODE.

Reported-by: François-Frédéric Ozog <ff@ozog.com>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: François-Frédéric Ozog <ff@ozog.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
2022-12-02 19:17:24 +01:00
Heinrich Schuchardt
1702055eb3 efi_loader: fix handling of DHCP acknowledge
The dhcp command may be executed after the first UEFI command.
We should still update the EFI_PXE_BASE_CODE_PROTOCOL.

Don't leak content of prior acknowledge packages.

Handle failing allocation when calling malloc().

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
2022-12-02 19:17:24 +01:00
Heinrich Schuchardt
f2833d451c efi_selftest: test FatToStr() truncation
Let the FatToStr test check that the FatSize parameter is considered.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-12-02 19:17:24 +01:00
Heinrich Schuchardt
f2d60f6257 efi_loader: add an EFI binary to print boot hart ID
Provide an EFI binary that prints the boot hart ID as found in the
device-tree as /chosen/boot-hartid property and as provided by the
RISCV_EFI_BOOT_PROTOCOL.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-12-02 19:17:24 +01:00
Andrew Davis
4bc50978e6 doc: board: j721e_evm: Fix code-block type and indents
* BASH code should be labeled as such.
 * Code blocks should be indented by 4 spaces.

Fix these here.

Suggested-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Andrew Davis <afd@ti.com>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2022-12-02 19:17:24 +01:00
Andrew Davis
2434a01d8a doc: board: j721e_evm: Add DM firmware steps
J721e needs DM firmware when using updated SYSFW. Add steps to fetch,
build, and deploy the same.

Signed-off-by: Andrew Davis <afd@ti.com>
2022-12-02 19:17:24 +01:00
Heinrich Schuchardt
bdb060a3eb net: CONFIG_NET_DEVICES in dhcp_handler()
The symbol CONFIG_NET_DEVICES does not exist.
The correct name is CONFIG_NETDEVICES.

Fixes: 77b5c4a5b1 ("efi_loader: Let networking support depend on NETDEVICES")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-12-02 19:17:24 +01:00
Heinrich Schuchardt
be2e42fa95 disk: fix blk_get_device_part_str()
blk_get_device_part_str() should always initialize all info fields
including sys_ind. As a side effect the code is simplified.

Replace '(0 ==' by '(!' to conform with Linux coding style.

Fixes: 4d907025d6 ("sandbox: restore ability to access host fs through standard commands")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
2022-12-02 19:17:24 +01:00
Heinrich Schuchardt
27380d885d console: file should always be non-negative
We use the parameter file in console functions to choose from an array
after checking against MAX_FILES but we never check if the value of file
is negative.

Running ./u-boot -T -l and issuing the poweroff command has resulted in
crashes because os_exit() results in std::ostream::flush() calling U-Boot's
fflush with file being a pointer which when converted to int may be
represented by a negative number.

This shows that checking against MAX_FILES is not enough. We have to ensure
that the file argument is always positive.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2022-12-02 19:17:24 +01:00
Tom Rini
a32f6341cc Merge branch '2022-12-02-assorted-updates'
- Add Peter Robinson as a co-custodian for Pi, update the maintainer
  record for common/usb_storage.c, re-add bmp_logo to tools-only and fix
  SPI booting on the SanCloud BBE
2022-12-02 10:00:55 -05:00
Paul Barker
c9311b5a90 MAINTAINERS: Adopt SanCloud boards
Signed-off-by: Paul Barker <paul.barker@sancloud.com>
Cc: Marc Murphy <marc.murphy@sancloud.com>
2022-12-02 08:39:00 -05:00
Paul Barker
b9829e9846 am335x-sancloud-bbe: Add -u-boot.dtsi files
The SanCloud BBE requires the same dtb nodes to be present in the SPL as
the AM335x EVM.

The SanCloud BBE Lite also requires the SPI flash node and all
dependencies to be present in the SPL to support SPI boot.

Signed-off-by: Paul Barker <paul.barker@sancloud.com>
2022-12-02 08:39:00 -05:00
Paul Barker
8328022d05 am335x-sancloud-bbe-lite: SPI flash is JEDEC compatible
Signed-off-by: Paul Barker <paul.barker@sancloud.com>
2022-12-02 08:39:00 -05:00
Paul Barker
d883280b91 am335x-evm: Support STMicro/Micron SPI flash
This change enables access to the SPI flash on the SanCloud BBE Lite
board.

Signed-off-by: Paul Barker <paul.barker@sancloud.com>
2022-12-02 08:39:00 -05:00
Paul Barker
f3b9abf5ba am335x-evm: Fix spiboot configuration
The advanced address translation provided by CONFIG_SPL_OF_TRANSLATE is
needed to determine the base address of the uart0 peripheral on am335x
platforms when CONFIG_SPL_OF_CONTROL is enabled.

If CONFIG_SPL_OF_CONTROL is enabled in the base (non-spiboot)
am335x_evm_defconfig, then CONFIG_SPL_OF_TRANSLATE will also need to be
enabled there. Unfortunately this cannot be done pre-emptively due to
the kconfig dependencies.

The TI clk-ctrl & TI sysc drivers are also required to bring up the SPI
bus on am335x platforms.

Signed-off-by: Paul Barker <paul.barker@sancloud.com>
2022-12-02 08:39:00 -05:00
Paul Barker
78b9afd2c3 am335x-evm: Enable required dtb nodes in SPL
For successful boot when CONFIG_SPL_OF_CONTROL=y, we need to ensure that
the board EEPROM on i2c0, the uart0 serial port and the relevant boot
device (mmc1 or mmc2) can be accessed in the SPL. We also need to
preserve the parent nodes for each required dtb node.

Signed-off-by: Paul Barker <paul.barker@sancloud.com>
2022-12-02 08:39:00 -05:00
Paul Barker
07744f2ac0 bus: Optionally include TI sysc driver in SPL/TPL
The TI sysc bus driver is required to allow access to the SPI bus on
am335x platforms. To support SPI boot this driver needs to be enabled in
the SPL/TPL as appropriate.

Signed-off-by: Paul Barker <paul.barker@sancloud.com>
2022-12-02 08:39:00 -05:00
Paul Barker
e92f47c06a bus: TI sysc driver requires DM
This driver does not build if CONFIG_DM is disabled as it uses the
function `dev_get_priv`.

Signed-off-by: Paul Barker <paul.barker@sancloud.com>
2022-12-02 08:39:00 -05:00
Paul Barker
dec64d55af dm: core: Fix iteration over driver_info records
We should only perform additional iteration steps when needed to
initialize the parent of a device. Other binding errors (such as a
missing driver) should not lead to additional iteration steps.

Unnecessary iteration steps can cause issues when memory is tightly
constrained (such as in the TPL/SPL) since device_bind_by_name()
unconditionally allocates memory for a struct udevice. On the SanCloud
BBE this led to boot failure caused by memory exhaustion in the SPL
when booting from SPI flash.

Signed-off-by: Paul Barker <paul.barker@sancloud.com>
2022-12-02 08:39:00 -05:00
Marek Vasut
9f52e765dc MAINTAINERS: Move usb_storage from DFU to USB
The usb_storage.c is the host-side USB mass storage device support,
it is not the DFU/UMS gadget-side implementation. Fix the entry.

Signed-off-by: Marek Vasut <marex@denx.de>
2022-12-02 08:39:00 -05:00
Peter Robinson
1cfba53ca4 config: tools only: add VIDEO to build bmp_logo
Pre 2023.01 the bmp_logo was built as part of the tools-only_defconfig
build, something changed and the VIDEO dep needed to build it
is no longer pulled in so fix that by explicitly defining it.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2022-12-02 08:39:00 -05:00
Matthias Brugger
58880b5208 MAINTAINERS: add RaspberryPi co-maintainer
Peter accpeted to step up as a co-maintainer for the RPis.
Reflect that in the corresponding MAINTAINERS files.

Signed-off-by: Matthias Brugger <mbrugger@suse.com>
Reviewed-by: Peter Robinson <pbrobinson@gmail.com>
2022-12-02 08:39:00 -05:00
Tom Rini
39b81955d3 Merge branch '2022-11-28-networking-updates-and-improvements'
- LiteX Ethernet support, dwc_eth_qos fixes, re-work fixing
  CVE-2022-{30790,30552}, macb race fix, Intel XWAY PHY support
  and add wget command and TCP support.
2022-11-28 13:12:40 -05:00
Tim Harvey
5e6c069b2c phy: add driver for Intel XWAY PHY
Add a driver for the Intel XWAY GbE PHY:
 - configure RGMII using dt phy-mode and standard delay properties
 - use genphy_config

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
2022-11-28 13:06:40 -05:00
Yaron Micher
d1559435d7 net: macb: Fix race caused by flushing unwanted descriptors
The rx descriptor list is in cached memory, and there may be multiple
descriptors per cache-line. After reclaim_rx_buffers marks a descriptor
as unused it does a cache flush, which causes the entire cache-line to
be written to memory, which may override other descriptors in the same
cache-line that the controller may have written to.

The fix skips freeing descriptors that are not the last in a cache-line,
and if the freed descriptor is the last one in a cache-line, it marks
all the descriptors in the cache-line as unused.
This is similarly to what is done in drivers/net/fec_mxc.c

In my case this bug caused tftpboot to fail some times when other
packets are sent to u-boot in addition to the ongoing tftp (e.g. ping).
The driver would stop receiving new packets because it is waiting
on a descriptor that is marked unused, when in reality the descriptor
contains a new unprocessed packet but while freeing the previous buffer
descriptor & flushing the cache, the driver accidentally marked the
descriptor as unused.

Signed-off-by: Yaron Micher <yaronm@hailo.ai>
2022-11-28 13:06:40 -05:00
Ying-Chun Liu (PaulLiu)
d6abc7e2e0 test: cmd: add test for wget command.
Simulate a TCP HTTP server's response for testing wget command.

Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
Cc: Christian Gmeiner <christian.gmeiner@gmail.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Ramon Fried <rfried.dev@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
2022-11-28 13:06:40 -05:00
Ying-Chun Liu (PaulLiu)
bfce0ca9d4 doc: cmd: wget: add documentation
Add documentation for the wget command.

Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
Cc: Christian Gmeiner <christian.gmeiner@gmail.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Ramon Fried <rfried.dev@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
2022-11-28 13:06:39 -05:00
Ying-Chun Liu (PaulLiu)
cfbae48219 net: Add wget application
This commit adds a simple wget command that can download files
from http server.

The command syntax is
wget ${loadaddr} <path of the file from server>

Signed-off-by: Duncan Hare <DuncanCHare@yahoo.com>
Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Cc: Christian Gmeiner <christian.gmeiner@gmail.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Ramon Fried <rfried.dev@gmail.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
2022-11-28 13:06:39 -05:00
Ying-Chun Liu (PaulLiu)
a3bf193bf4 net: Add TCP protocol
Currently file transfers are done using tftp or NFS both
over udp. This requires a request to be sent from client
(u-boot) to the boot server.

The current standard is TCP with selective acknowledgment.

Signed-off-by: Duncan Hare <DH@Synoia.com>
Signed-off-by: Duncan Hare <DuncanCHare@yahoo.com>
Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Cc: Christian Gmeiner <christian.gmeiner@gmail.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Ramon Fried <rfried.dev@gmail.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
2022-11-28 13:06:39 -05:00
Tim Harvey
3cdbbe52f7 drivers: net: aquantia: fix typos
Fix a couple of typos:
- s/Acquantia/Aquantia/
- s/firmare/firmware/

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
2022-11-28 13:06:39 -05:00
Rasmus Villemoes
0686968639 net: deal with fragment-overlapping-two-holes case
With a suitable sequence of malicious packets, it's currently possible
to get a hole descriptor to contain arbitrary attacker-controlled
contents, and then with one more packet to use that as an arbitrary
write vector.

While one could possibly change the algorithm so we instead loop over
all holes, and in each hole puts as much of the current fragment as
belongs there (taking care to carefully update the hole list as
appropriate), it's not worth the complexity: In real, non-malicious
scenarios, one never gets overlapping fragments, and certainly not
fragments that would be supersets of one another.

So instead opt for this simple protection: Simply don't allow the
eventual memcpy() to write beyond the last_byte of the current hole.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
2022-11-28 13:06:39 -05:00
Rasmus Villemoes
087648b5df net: tftp: sanitize tftp block size, especially for TX
U-Boot does not support IP fragmentation on TX (and unless
CONFIG_IP_DEFRAG is set, neither on RX). So the blocks we send must
fit in a single ethernet packet.

Currently, if tftpblocksize is set to something like 5000 and I
tftpput a large enough file, U-Boot crashes because we overflow
net_tx_packet (which only has room for 1500 bytes plus change).

Similarly, if tftpblocksize is set to something larger than what we
can actually receive (e.g. 50000, with NET_MAXDEFRAG being 16384), any
tftp get just hangs because we never receive any packets.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
2022-11-28 13:06:39 -05:00
Rasmus Villemoes
4b8c44e39c net: tftp: use IS_ENABLED(CONFIG_NET_TFTP_VARS) instead of #if
Nothing inside this block depends on NET_TFTP_VARS to be set to parse
correctly. Switch to C if() in preparation for adding code before
this (to avoid a declaration-after-statement warning).

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
[trini: Update to cover CONFIG_TFTP_PORT case as well]
Signed-off-by: Tom Rini <trini@konsulko.com>
2022-11-28 13:06:14 -05:00
Rasmus Villemoes
06653c7010 net: fix ip_len in reassembled IP datagram
For some reason, the ip_len field in a reassembled IP datagram is set
to just the size of the payload, but it should be set to the value it
would have had if the datagram had never been fragmented in the first
place, i.e. size of payload plus size of IP header.

That latter value is currently returned correctly via the "len"
variable. And before entering net_defragment(), len does have the
value ntohs(ip->ip_len), so if we're not dealing with a
fragment (so net_defragment leaves *len alone), that relationship of
course also holds after the net_defragment() call.

The only use I can find of ip->ip_len after the net_defragment call is
the ntohs(ip->udp_len) > ntohs(ip->ip_len) sanity check - none of the
functions that are passed the "ip" pointer themselves inspect ->ip_len
but instead use the passed len.

But that sanity check is a bit odd, since the RHS really should be
"ntohs(ip->ip_len) - 20", i.e. the IP payload size.

Now that we've fixed things so that len == ntohs(ip->ip_len) in all
cases, change that sanity check to use len-20 as the RHS.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
2022-11-28 10:25:18 -05:00
Rasmus Villemoes
1817c3824a net: (actually/better) deal with CVE-2022-{30790,30552}
I hit a strange problem with v2022.10: Sometimes my tftp transfer
would seemingly just hang. It only happened for some files. Moreover,
changing tftpblocksize from 65464 to 65460 or 65000 made it work again
for all the files I tried. So I started suspecting it had something to
do with the file sizes and in particular the way the tftp blocks get
fragmented and reassembled.

v2022.01 showed no problems with any of the files or any value of
tftpblocksize.

Looking at what had changed in net.c or tftp.c since January showed
only one remotely interesting thing, b85d130ea0.

So I fired up wireshark on my host to see if somehow one of the
packets would be too small. But no, with both v2022.01 and v2022.10,
the exact same sequence of packets were sent, all but the last of size
1500, and the last being 1280 bytes.

But then it struck me that 1280 is 5*256, so one of the two bytes
on-the-wire is 0 and the other is 5, and when then looking at the code
again the lack of endianness conversion becomes obvious. [ntohs is
both applied to ip->ip_off just above, as well as to ip->ip_len just a
little further down when the "len" is actually computed].

IOWs the current code would falsely reject any packet which happens to
be a multiple of 256 bytes in size, breaking tftp transfers somewhat
randomly, and if it did get one of those "malicious" packets with
ip_len set to, say, 27, it would be seen by this check as being 6912
and hence not rejected.

====

Now, just adding the missing ntohs() would make my initial problem go
away, in that I can now download the file where the last fragment ends
up being 1280 bytes. But there's another bug in the code and/or
analysis: The right-hand side is too strict, in that it is ok for the
last fragment not to have a multiple of 8 bytes as payload - it really
must be ok, because nothing in the IP spec says that IP datagrams must
have a multiple of 8 bytes as payload. And comments in the code also
mention this.

To fix that, replace the comparison with <= IP_HDR_SIZE and add
another check that len is actually a multiple of 8 when the "more
fragments" bit is set - which it necessarily is for the case where
offset8 ends up being 0, since we're only called when

  (ip_off & (IP_OFFS | IP_FLAGS_MFRAG)).

====

So, does this fix CVE-2022-30790 for real? It certainly correctly
rejects the POC code which relies on sending a packet of size 27 with
the MFRAG flag set. Can the attack be carried out with a size 27
packet that doesn't set MFRAG (hence must set a non-zero fragment
offset)? I dunno. If we get a packet without MFRAG, we update
h->last_byte in the hole we've found to be start+len, hence we'd enter
one of

	if ((h >= thisfrag) && (h->last_byte <= start + len)) {

or

	} else if (h->last_byte <= start + len) {

and thus won't reach any of the

		/* overlaps with initial part of the hole: move this hole */
		newh = thisfrag + (len / 8);

		/* fragment sits in the middle: split the hole */
		newh = thisfrag + (len / 8);

IOW these division are now guaranteed to be exact, and thus I think
the scenario in CVE-2022-30790 cannot happen anymore.

====

However, there's a big elephant in the room, which has always been
spelled out in the comments, and which makes me believe that one can
still cause mayhem even with packets whose payloads are all 8-byte
aligned:

    This code doesn't deal with a fragment that overlaps with two
    different holes (thus being a superset of a previously-received
    fragment).

Suppose each character below represents 8 bytes, with D being already
received data, H being a hole descriptor (struct hole), h being
non-populated chunks, and P representing where the payload of a just
received packet should go:

  DDDHhhhhDDDDHhhhDDDD
        PPPPPPPPP

I'm pretty sure in this case we'd end up with h being the first hole,
enter the simple

	} else if (h->last_byte <= start + len) {
		/* overlaps with final part of the hole: shorten this hole */
		h->last_byte = start;

case, and thus in the memcpy happily overwrite the second H with our
chosen payload. This is probably worth fixing...

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
2022-11-28 10:25:18 -05:00