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From 953f340c3e24c296e9e73f4a0b45ff6563359592 Mon Sep 17 00:00:00 2001
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From: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
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Date: Fri, 5 Feb 2016 14:47:11 +0100
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Subject: [PATCH] fdasd.c: Safeguard against geometry misprobing
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Fixes an issue with parted print being run against a logical
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volume realised by extents on a physical volume residing on
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a DASD.
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We must make sure that geometry, device blocksize and DASD
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attributes are present before we start format verifications
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If any of it is missing this is not a DASD.
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Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
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Signed-off-by: Brian C. Lane <bcl@redhat.com>
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---
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libparted/labels/fdasd.c | 11 +++++++++--
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1 file changed, 9 insertions(+), 2 deletions(-)
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diff --git a/libparted/labels/fdasd.c b/libparted/labels/fdasd.c
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index 7e6a77a..968b332 100644
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--- a/libparted/labels/fdasd.c
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+++ b/libparted/labels/fdasd.c
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@@ -1021,13 +1021,20 @@ fdasd_get_geometry (const PedDevice *dev, fdasd_anchor_t *anc, int f)
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goto error;
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}
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- if (ioctl(f, HDIO_GETGEO, &anc->geo) != 0)
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+ if (ioctl(f, HDIO_GETGEO, &anc->geo) != 0 ||
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+ anc->geo.heads == 0 ||
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+ anc->geo.sectors == 0 ||
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+ anc->geo.cylinders == 0 ) {
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fdasd_error(anc, unable_to_ioctl,
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_("Could not retrieve disk geometry information."));
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+ goto error;
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+ }
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- if (ioctl(f, BLKSSZGET, &blksize) != 0)
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+ if (ioctl(f, BLKSSZGET, &blksize) != 0) {
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fdasd_error(anc, unable_to_ioctl,
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_("Could not retrieve blocksize information."));
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+ goto error;
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+ }
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/* get disk type */
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if (ioctl(f, BIODASDINFO, &dasd_info) != 0) {
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--
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2.5.0
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