Kohei Enju 89b8ca709e efivarfs: fix error propagation in efivar_entry_get() ...

commit 4b22ec1685 upstream.

efivar_entry_get() always returns success even if the underlying
__efivar_entry_get() fails, masking errors.

This may result in uninitialized heap memory being copied to userspace
in the efivarfs_file_read() path.

Fix it by returning the error from __efivar_entry_get().

Fixes: 2d82e6227e ("efi: vars: Move efivar caching layer into efivarfs")
Cc: <stable@vger.kernel.org> # v6.1+
Signed-off-by: Kohei Enju <kohei@enjuk.jp>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2026-02-06 16:55:45 +01:00

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file.c

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inode.c

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internal.h

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Kconfig

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Makefile

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super.c

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vars.c

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