51 lines
2.1 KiB
Diff
51 lines
2.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: B Horn <b@horn.uk>
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Date: Tue, 11 Feb 2025 17:12:29 -0600
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Subject: [PATCH] commands/memrw: Disable memory reading in lockdown mode
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With the rest of module being blocked in lockdown mode it does not make
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a lot of sense to leave memory reading enabled. This also goes in par
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with disabling the dump command.
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Reported-by: B Horn <b@horn.uk>
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Signed-off-by: B Horn <b@horn.uk>
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Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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---
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grub-core/commands/memrw.c | 21 ++++++++++++---------
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1 file changed, 12 insertions(+), 9 deletions(-)
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diff --git a/grub-core/commands/memrw.c b/grub-core/commands/memrw.c
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index 39cf3a06d..9d8a54a4b 100644
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--- a/grub-core/commands/memrw.c
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+++ b/grub-core/commands/memrw.c
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@@ -126,17 +126,20 @@ GRUB_MOD_INIT(memrw)
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return;
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cmd_read_byte =
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- grub_register_extcmd ("read_byte", grub_cmd_read, 0,
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- N_("ADDR"), N_("Read 8-bit value from ADDR."),
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- options);
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+ grub_register_extcmd_lockdown ("read_byte", grub_cmd_read, 0,
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+ N_("ADDR"),
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+ N_("Read 8-bit value from ADDR."),
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+ options);
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cmd_read_word =
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- grub_register_extcmd ("read_word", grub_cmd_read, 0,
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- N_("ADDR"), N_("Read 16-bit value from ADDR."),
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- options);
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+ grub_register_extcmd_lockdown ("read_word", grub_cmd_read, 0,
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+ N_("ADDR"),
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+ N_("Read 16-bit value from ADDR."),
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+ options);
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cmd_read_dword =
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- grub_register_extcmd ("read_dword", grub_cmd_read, 0,
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- N_("ADDR"), N_("Read 32-bit value from ADDR."),
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- options);
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+ grub_register_extcmd_lockdown ("read_dword", grub_cmd_read, 0,
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+ N_("ADDR"),
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+ N_("Read 32-bit value from ADDR."),
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+ options);
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cmd_write_byte =
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grub_register_command_lockdown ("write_byte", grub_cmd_write,
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N_("ADDR VALUE [MASK]"),
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