Eric Biggers 5294144b6a 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>		2023-09-19 12:22:52 +02:00
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Kconfig	fsverity: relax build time dependency on CRYPTO_SHA256	2021-04-22 17:31:32 +10:00
Makefile	fs-verity: add FS_IOC_READ_VERITY_METADATA ioctl	2021-02-07 14:51:11 -08:00
enable.c	fsverity: don't drop pagecache at end of FS_IOC_ENABLE_VERITY	2023-04-05 11:24:51 +02:00
fsverity_private.h	fs-verity: don't pass whole descriptor to fsverity_verify_signature()	2021-02-07 14:51:09 -08:00
hash_algs.c	fs-verity: remove filenames from file comments	2020-11-16 11:40:10 -08:00
init.c	fs-verity: remove filenames from file comments	2020-11-16 11:40:10 -08:00
measure.c	fs-verity: rename "file measurement" to "file digest"	2020-11-16 11:40:12 -08:00
open.c	fs-verity: fix signed integer overflow with i_size near S64_MAX	2021-09-22 10:56:34 -07:00
read_metadata.c	fs-verity: support reading signature with ioctl	2021-02-07 14:51:19 -08:00
signature.c	fsverity: skip PKCS#7 parser when keyring is empty	2023-09-19 12:22:52 +02:00
verify.c	fsverity: Remove WQ_UNBOUND from fsverity read workqueue	2023-03-30 12:47:56 +02:00