Eric Biggers 919dc32095 fsverity: skip PKCS#7 parser when keyring is empty ... 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>		2023-08-20 10:33:43 -07:00
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enable.c	fsverity: improve documentation for builtin signature support	2023-06-20 22:47:55 -07:00
fsverity_private.h	fsverity: move sysctl registration out of signature.c	2023-07-11 22:57:03 -07:00
hash_algs.c	fsverity: explicitly check that there is no algorithm 0	2023-07-11 22:49:18 -07:00
init.c	fsverity: move sysctl registration out of signature.c	2023-07-11 22:57:03 -07:00
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: simplify handling of errors during initcall	2023-07-11 22:49:18 -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	2023-08-20 10:33:43 -07:00
verify.c	fsverity: simplify handling of errors during initcall	2023-07-11 22:49:18 -07:00