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From 02178bf3980410abdd57c9f1045ff27bc4f11d7e Mon Sep 17 00:00:00 2001
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From: "Brian C. Lane" <bcl@redhat.com>
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Date: Mon, 11 Apr 2016 15:10:51 -0700
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Subject: [PATCH 36/36] libparted: Remove fdasd geometry code from
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alloc_metadata (#1244833)
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commit db20944f changed how the trailing_metadata_end is calculated in
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dasd_alloc_metadata, removing the need for setting up the anchor struct.
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But dasd_alloc_metadata can be called in various contexts, and the
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arch_specific->fd may or may not be valid during these calls. This can
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result in unpredictable crashes when it uses a stale fd and tries to run
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the file image code in fdasd_get_geometry instead of the device code.
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The solution is to just drop the unneeded code, and to remember that
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arch_specific->fd should only be used when ped_device_open has first
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been called.
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Resolves: rhbz#1244833
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(cherry picked from commit 9da2f460bebf9a8281fdd52536d3676b0914b8fd)
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---
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libparted/labels/dasd.c | 4 ----
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1 file changed, 4 deletions(-)
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diff --git a/libparted/labels/dasd.c b/libparted/labels/dasd.c
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index bb32d66..f79a867 100644
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--- a/libparted/labels/dasd.c
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+++ b/libparted/labels/dasd.c
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@@ -948,7 +948,6 @@ dasd_alloc_metadata (PedDisk* disk)
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PedPartition* part = NULL; /* initialize solely to placate gcc */
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PedPartition* new_part2;
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PedSector trailing_meta_start, trailing_meta_end;
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- struct fdasd_anchor anchor;
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PED_ASSERT (disk != NULL);
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PED_ASSERT (disk->dev != NULL);
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@@ -998,10 +997,7 @@ dasd_alloc_metadata (PedDisk* disk)
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backed up, then restored to a larger size disk, etc.
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*/
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trailing_meta_start = part->geom.end + 1;
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- fdasd_initialize_anchor(&anchor);
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- fdasd_get_geometry(disk->dev, &anchor, arch_specific->fd);
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trailing_meta_end = (long long) disk->dev->length - 1;
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- fdasd_cleanup(&anchor);
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if (trailing_meta_end >= trailing_meta_start) {
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new_part2 = ped_partition_new (disk,PED_PARTITION_METADATA,
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NULL, trailing_meta_start, trailing_meta_end);
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--
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2.5.5
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