Eric Biggers d08b39bb3d 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 09:43:03 +02:00
..
Kconfig	…
Makefile	…
enable.c	fsverity: don't drop pagecache at end of FS_IOC_ENABLE_VERITY	2023-04-06 12:10:34 +02:00
fsverity_private.h	btrfs: send: add support for fs-verity	2022-09-26 12:27:55 +02:00
hash_algs.c	…
init.c	…
measure.c	…
open.c	…
read_metadata.c	fs-verity: use kmap_local_page() instead of kmap()	2022-08-19 15:19:55 -07:00
signature.c	fsverity: skip PKCS#7 parser when keyring is empty	2023-09-13 09:43:03 +02:00
verify.c	fsverity: Remove WQ_UNBOUND from fsverity read workqueue	2023-03-30 12:49:23 +02:00