efivarfs: fix error propagation in efivar_entry_get()

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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>

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Kohei Enju 2026-01-17 16:00:45 +00:00 • committed by Ard Biesheuvel

parent d7f1b4bdc7

commit 4b22ec1685

1 changed files with 1 additions and 1 deletions

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fs/efivarfs/vars.c

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