[PATCH 5.9 19/74] fs/kernel_read_file: Remove FIRMWARE_EFI_EMBEDDED enum

Greg Kroah-Hartman
2020-10-31T11:43:49Z

From: Kees Cook <keescook@chromium.org>

commit 06e67b849ab910a49a629445f43edb074153d0eb upstream.

The "FIRMWARE_EFI_EMBEDDED" enum is a "where", not a "what". It
should not be distinguished separately from just "FIRMWARE", as this
confuses the LSMs about what is being loaded. Additionally, there was
no actual validation of the firmware contents happening.

Fixes: e4c2c0ff00ec ("firmware: Add new platform fallback mechanism and firmware_request_platform()")
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Acked-by: Scott Branden <scott.branden@broadcom.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20201002173828.2099543-3-keescook@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/base/firmware_loader/fallback_platform.c | 2 +-
include/linux/fs.h | 1 -
2 files changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/base/firmware_loader/fallback_platform.c
+++ b/drivers/base/firmware_loader/fallback_platform.c
@@ -17,7 +17,7 @@ int firmware_fallback_platform(struct fw
if (!(opt_flags & FW_OPT_FALLBACK_PLATFORM))
return -ENOENT;

- rc = security_kernel_load_data(LOADING_FIRMWARE_EFI_EMBEDDED);
+ rc = security_kernel_load_data(LOADING_FIRMWARE);
if (rc)
return rc;

--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2862,7 +2862,6 @@ extern int do_pipe_flags(int *, int);
id(UNKNOWN, unknown) \
id(FIRMWARE, firmware) \
id(FIRMWARE_PREALLOC_BUFFER, firmware) \
- id(FIRMWARE_EFI_EMBEDDED, firmware) \
id(MODULE, kernel-module) \
id(KEXEC_IMAGE, kexec-image) \
id(KEXEC_INITRAMFS, kexec-initramfs) \