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linux/drivers/firmware
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Ard Biesheuvel ccb4aef2e7 efi/libstub: Avoid physical address 0x0 when doing random allocation 
commit cb16dfed00 upstream.

Ben reports spurious EFI zboot failures on a system where physical RAM
starts at 0x0. When doing random memory allocation from the EFI stub on
such a platform, a random seed of 0x0 (which means no entropy source is
available) will result in the allocation to be placed at address 0x0 if
sufficient space is available.

When this allocation is subsequently passed on to the decompression
code, the 0x0 address is mistaken for NULL and the code complains and
gives up.

So avoid address 0x0 when doing random allocation, and set the minimum
address to the minimum alignment.

Cc: <stable@vger.kernel.org>
Reported-by: Ben Schneider <ben@bens.haus>
Tested-by: Ben Schneider <ben@bens.haus>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-03-28 21:59:01 +01:00
..
arm_ffa firmware: arm_ffa: Allow the FF-A drivers to use 32bit mode of messaging 2023-11-20 11:52:03 +01:00
arm_scmi firmware: arm_scmi: Fix double free in OPTEE transport 2024-10-17 15:20:45 +02:00
broadcom firmware: tee_bnxt: Use UUID API for exporting the UUID 2022-05-05 18:14:29 -07:00
cirrus firmware: cs_dsp: Don't allow writes to read-only controls 2024-09-12 11:10:22 +02:00
efi efi/libstub: Avoid physical address 0x0 when doing random allocation 2025-03-28 21:59:01 +01:00
google firmware: google: Unregister driver_info on failure 2024-12-14 19:53:16 +01:00
imx firmware: imx-scu: fix OF node leak in .probe() 2025-03-28 21:58:59 +01:00
meson firmware: meson_sm: populate platform devices from sm device tree data 2024-01-25 15:27:24 -08:00
psci firmware: psci: Fix return value from psci_system_suspend() 2024-06-27 13:46:21 +02:00
smccc arm64: smccc: Remove broken support for SMCCCv1.3 SVE discard hint 2024-12-14 19:54:53 +01:00
tegra firmware: tegra: bpmp: Drop unused mbox_client_to_bpmp() 2024-10-17 15:21:51 +02:00
xilinx firmware: xilinx: don't make a sleepable memory allocation from an atomic context 2023-03-22 13:33:56 +01:00
arm_scpi.c firmware: arm_scpi: Check the DVFS OPP count returned by the firmware 2024-12-14 19:53:23 +01:00
arm_sdei.c firmware: arm_sdei: Fix the input parameter of cpuhp_remove_state() 2024-11-08 16:26:43 +01:00
dmi-id.c firmware: dmi-id: add a release callback function 2024-06-12 11:03:34 +02:00
dmi-sysfs.c firmware: dmi-sysfs: Fix null-ptr-deref in dmi_sysfs_register_handle 2023-03-10 09:33:34 +01:00
dmi_scan.c firmware: dmi: Stop decoding on broken entry 2024-07-11 12:47:07 +02:00
edd.c edd: simplify the check of 'attr->test' in edd_populate_dir() 2022-05-19 18:57:04 +02:00
iscsi_ibft.c iscsi_ibft: Fix UBSAN shift-out-of-bounds warning in ibft_attr_show_nic() 2025-03-28 21:58:50 +01:00
iscsi_ibft_find.c iscsi_ibft: fix warning in reserve_ibft_region() 2021-08-05 19:47:57 -04:00
Kconfig firmware: iscsi_ibft: fix ISCSI_IBFT Kconfig entry 2025-02-21 13:49:36 +01:00
Makefile Follow-up tweaks for the EFI changes in v5.19 2022-06-03 13:39:30 -07:00
memmap.c firmware: memmap: use default_groups in kobj_type 2022-01-05 19:17:29 +01:00
mtk-adsp-ipc.c firmware: mediatek: Use meaningful names for mbox 2022-06-22 13:39:30 +01:00
pcdp.c efi/ia64: Move HCDP and MPS table handling into IA64 arch code 2020-02-23 21:59:42 +01:00
pcdp.h firmware: pcdp: Replace zero-length array with flexible-array 2020-06-15 23:08:32 -05:00
qcom_scm-legacy.c firmware: qcom_scm-legacy: correct kerneldoc 2022-06-25 22:04:31 -05:00
qcom_scm-smc.c firmware: qcom_scm: Reduce locking section for __get_convention() 2021-04-06 21:25:23 -05:00
qcom_scm.c firmware: qcom_scm: disable clocks if qcom_scm_bw_enable() fails 2024-06-21 14:35:40 +02:00
qcom_scm.h firmware: qcom: scm: remove unused __qcom_scm_init declaration 2022-09-13 15:14:54 -05:00
qemu_fw_cfg.c firmware: qemu_fw_cfg: remove sysfs entries explicitly 2022-01-14 18:50:52 -05:00
raspberrypi.c firmware: raspberrypi: Use correct device for DMA mappings 2024-06-12 11:03:04 +02:00
scpi_pm_domain.c firmware: arm_scpi: Fix string overflow in SCPI genpd driver 2021-12-13 15:17:37 +01:00
stratix10-rsu.c firmware: stratix10-rsu: extend RSU driver to get DCMF status 2022-07-14 16:55:09 +02:00
stratix10-svc.c firmware: stratix10-svc: Fix an NULL vs IS_ERR() bug in probe 2023-09-06 21:27:02 +01:00
sysfb.c efi: sysfb_efi: Fix DMI quirks not working for simpledrm 2023-03-30 12:49:22 +02:00
sysfb_simplefb.c efi: sysfb_efi: Fix DMI quirks not working for simpledrm 2023-03-30 12:49:22 +02:00
ti_sci.c firmware: ti_sci: Fix an off-by-one in ti_sci_debugfs_create() 2024-01-25 15:27:24 -08:00
ti_sci.h firmware: ti_sci: rm: Add new ops for ring configuration 2020-11-01 19:38:02 -08:00
trusted_foundations.c firmware: tf: Different way of L2 cache enabling after LP2 suspend 2020-05-06 18:27:26 +02:00
turris-mox-rwtm.c firmware: turris-mox-rwtm: Initialize completion before mailbox 2024-08-03 08:49:03 +02:00