Eric Biggers 5b04dbb97f fsverity: skip PKCS#7 parser when keyring is empty ... commit 919dc32095 upstream. If an fsverity builtin signature is given for a file but the ".fs-verity" keyring is empty, there's no real reason to run the PKCS#7 parser. Skip this to avoid the PKCS#7 attack surface when builtin signature support is configured into the kernel but is not being used. This is a hardening improvement, not a fix per se, but I've added Fixes and Cc stable to get it out to more users. Fixes: 432434c9f8 ("fs-verity: support builtin file signatures") Cc: stable@vger.kernel.org Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> Link: https://lore.kernel.org/r/20230820173237.2579-1-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-09-13 09:53:55 +02:00
..
enable.c	fsverity: improve documentation for builtin signature support	2023-06-20 22:47:55 -07:00
fsverity_private.h	fsverity: constify fsverity_hash_alg	2023-06-04 05:56:11 -07:00
hash_algs.c	fsverity: constify fsverity_hash_alg	2023-06-04 05:56:11 -07:00
init.c	fsverity: remove debug messages and CONFIG_FS_VERITY_DEBUG	2023-01-01 15:46:48 -08:00
Kconfig	fsverity: improve documentation for builtin signature support	2023-06-20 22:47:55 -07:00
Makefile	fs-verity: add FS_IOC_READ_VERITY_METADATA ioctl	2021-02-07 14:51:11 -08:00
measure.c	fsverity: rework fsverity_get_digest() again	2023-06-14 10:41:07 -07:00
open.c	fsverity: improve documentation for builtin signature support	2023-06-20 22:47:55 -07:00
read_metadata.c	fsverity: improve documentation for builtin signature support	2023-06-20 22:47:55 -07:00
signature.c	fsverity: skip PKCS#7 parser when keyring is empty	2023-09-13 09:53:55 +02:00
verify.c	fsverity: simplify error handling in verify_data_block()	2023-06-04 05:56:11 -07:00