linux/drivers/firmware/efi
Ard Biesheuvel 79832f0b5f efi/libstub/tpm: Initialize pointer variables to zero for mixed mode
As reported by Jeremy Cline, running the new TPM libstub code in mixed
mode (i.e., 64-bit kernel on 32-bit UEFI) results in hangs when invoking
the TCG2 protocol, or when accessing the log_tbl pool allocation.

The reason turns out to be that in both cases, the 64-bit pointer
variables are not fully initialized by the 32-bit EFI code, and so
we should take care to zero initialize these variables beforehand,
or we'll end up dereferencing bogus pointers.

Reported-by: Jeremy Cline <jeremy@jcline.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: hdegoede@redhat.com
Cc: jarkko.sakkinen@linux.intel.com
Cc: javierm@redhat.com
Cc: linux-efi@vger.kernel.org
Cc: tweek@google.com
Link: http://lkml.kernel.org/r/20180313140922.17266-2-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-03-13 15:28:29 +01:00
..
libstub efi/libstub/tpm: Initialize pointer variables to zero for mixed mode 2018-03-13 15:28:29 +01:00
test License cleanup: add SPDX license identifiers to some files 2017-11-02 10:04:46 -07:00
apple-properties.c treewide: Consolidate Apple DMI checks 2017-08-03 23:26:22 +02:00
arm-init.c efi/arm/arm64: Add missing assignment of efi.config_table 2017-08-21 09:43:49 +02:00
arm-runtime.c efi/arm: Enable DMI/SMBIOS 2017-06-05 17:50:44 +02:00
capsule-loader.c efi/capsule-loader: Fix pr_err() string to end with newline 2018-01-03 14:03:48 +01:00
capsule.c efi/capsule-loader: Use page addresses rather than struct page pointers 2017-06-05 17:50:41 +02:00
cper-arm.c efi: Parse ARM error information value 2018-01-03 14:03:48 +01:00
cper.c efi: Move ARM CPER code to new file 2018-01-03 14:03:48 +01:00
dev-path-parser.c efi: Add device path parser 2016-11-13 08:23:15 +01:00
efi-bgrt.c efi/bgrt: Use efi_mem_type() 2017-08-26 09:20:33 +02:00
efi-pstore.c pstore: Populate pstore record->time field 2017-05-31 10:13:44 -07:00
efi.c Merge branch 'next-tpm' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2018-01-31 13:12:31 -08:00
efibc.c efibc: Report more information in the error messages 2016-06-27 13:06:54 +02:00
efivars.c efi: Don't use spinlocks for efi vars 2016-09-09 16:08:42 +01:00
esrt.c efi/esrt: Use memunmap() instead of kfree() to free the remapping 2017-12-06 19:32:08 +01:00
fake_mem.c x86/efi: Don't allocate memmap through memblock after mm_init() 2017-01-07 08:58:07 +01:00
Kconfig Kconfig updates for v4.16 2018-02-01 11:45:49 -08:00
Makefile Merge branch 'next-tpm' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2018-01-31 13:12:31 -08:00
memattr.c x86/efi: Add support for EFI_MEMORY_ATTRIBUTES_TABLE 2017-02-01 08:45:44 +01:00
memmap.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
reboot.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
runtime-map.c efi: Move some sysfs files to be read-only by root 2017-12-06 19:31:39 +01:00
runtime-wrappers.c efi: Replace runtime services spinlock with semaphore 2016-09-09 16:08:43 +01:00
tpm.c efi: call get_event_log before ExitBootServices 2018-01-08 12:58:35 +02:00
vars.c efi: Don't use spinlocks for efi vars 2016-09-09 16:08:42 +01:00