Tim Schumacher 71da10e633 efivarfs: Request at most 512 bytes for variable names ... commit f45812cc23 upstream. Work around a quirk in a few old (2011-ish) UEFI implementations, where a call to `GetNextVariableName` with a buffer size larger than 512 bytes will always return EFI_INVALID_PARAMETER. There is some lore around EFI variable names being up to 1024 bytes in size, but this has no basis in the UEFI specification, and the upper bounds are typically platform specific, and apply to the entire variable (name plus payload). Given that Linux does not permit creating files with names longer than NAME_MAX (255) bytes, 512 bytes (== 256 UTF-16 characters) is a reasonable limit. Cc: <stable@vger.kernel.org> # 6.1+ Signed-off-by: Tim Schumacher <timschumi@gmx.de> Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-03-06 14:48:41 +00:00
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Kconfig	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Makefile	efi: vars: Move efivar caching layer into efivarfs	2022-06-24 20:40:19 +02:00
file.c	efivarfs: convert to ctime accessor functions	2023-07-13 10:28:06 +02:00
inode.c	efivarfs: convert to ctime accessor functions	2023-07-13 10:28:06 +02:00
internal.h	efi: vars: Move efivar caching layer into efivarfs	2022-06-24 20:40:19 +02:00
super.c	efivarfs: Free s_fs_info on unmount	2024-01-25 15:35:15 -08:00
vars.c	efivarfs: Request at most 512 bytes for variable names	2024-03-06 14:48:41 +00:00