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From 8f4dc1510c0f42a549b91c28eda74fe8a1e2a5d4 Mon Sep 17 00:00:00 2001
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From: Andrei Borzenkov <arvidjaar@gmail.com>
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Date: Fri, 26 Feb 2016 21:44:37 +0300
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Subject: [PATCH] efidisk: prevent errors from diskfilter scan of removable
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drives
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Map EFI_NO_MEDIA to GRUB_ERR_OUT_OF_RANGE that is ignored by diskfilter. This
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actually matches pretty close (we obviously attempt to read outside of media)
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and avoids adding more error codes.
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This affects only internally initiated scans. If read/write from removable is
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explicitly requested, we still return an error and text explanation is more
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clear for user than generic error.
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Reported and tested by Andreas Loew <Andreas.Loew@gmx.net>
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---
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grub-core/disk/efi/efidisk.c | 12 ++++++++----
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1 file changed, 8 insertions(+), 4 deletions(-)
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diff --git a/grub-core/disk/efi/efidisk.c b/grub-core/disk/efi/efidisk.c
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index f04f20b84ff..41adc1b0421 100644
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--- a/grub-core/disk/efi/efidisk.c
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+++ b/grub-core/disk/efi/efidisk.c
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@@ -575,9 +575,11 @@ grub_efidisk_read (struct grub_disk *disk, grub_disk_addr_t sector,
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status = grub_efidisk_readwrite (disk, sector, size, buf, 0);
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- if (status != GRUB_EFI_SUCCESS)
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+ if (status == GRUB_EFI_NO_MEDIA)
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+ return grub_error (GRUB_ERR_OUT_OF_RANGE, "no media in `%s'", disk->name);
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+ else if (status != GRUB_EFI_SUCCESS)
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return grub_error (GRUB_ERR_READ_ERROR,
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- N_("failure reading sector 0x%llx from `%s'"),
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+ "failure reading sector 0x%llx from `%s'",
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(unsigned long long) sector,
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disk->name);
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@@ -596,9 +598,11 @@ grub_efidisk_write (struct grub_disk *disk, grub_disk_addr_t sector,
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status = grub_efidisk_readwrite (disk, sector, size, (char *) buf, 1);
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- if (status != GRUB_EFI_SUCCESS)
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+ if (status == GRUB_EFI_NO_MEDIA)
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+ return grub_error (GRUB_ERR_OUT_OF_RANGE, "no media in `%s'", disk->name);
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+ else if (status != GRUB_EFI_SUCCESS)
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return grub_error (GRUB_ERR_WRITE_ERROR,
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- N_("failure writing sector 0x%llx to `%s'"),
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+ "failure writing sector 0x%llx to `%s'",
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(unsigned long long) sector, disk->name);
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return GRUB_ERR_NONE;
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--
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2.20.1
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