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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Marco A Benatto <mbenatto@redhat.com>
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Date: Mon, 7 Dec 2020 11:53:03 -0300
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Subject: [PATCH] disk/ldm: Make sure comp data is freed before exiting from
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make_vg()
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Several error handling paths in make_vg() do not free comp data before
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jumping to fail2 label and returning from the function. This will leak
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memory. So, let's fix all issues of that kind.
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Fixes: CID 73804
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Signed-off-by: Marco A Benatto <mbenatto@redhat.com>
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Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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---
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grub-core/disk/ldm.c | 51 ++++++++++++++++++++++++++++++++++++++++++++-------
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1 file changed, 44 insertions(+), 7 deletions(-)
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diff --git a/grub-core/disk/ldm.c b/grub-core/disk/ldm.c
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index 58f8a53e1ab..428415fac24 100644
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--- a/grub-core/disk/ldm.c
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+++ b/grub-core/disk/ldm.c
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@@ -554,7 +554,11 @@ make_vg (grub_disk_t disk,
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comp->segments = grub_calloc (comp->segment_alloc,
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sizeof (*comp->segments));
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if (!comp->segments)
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- goto fail2;
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+ {
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+ grub_free (comp->internal_id);
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+ grub_free (comp);
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+ goto fail2;
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+ }
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}
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else
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{
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@@ -562,7 +566,11 @@ make_vg (grub_disk_t disk,
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comp->segment_count = 1;
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comp->segments = grub_malloc (sizeof (*comp->segments));
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if (!comp->segments)
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- goto fail2;
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+ {
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+ grub_free (comp->internal_id);
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+ grub_free (comp);
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+ goto fail2;
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+ }
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comp->segments->start_extent = 0;
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comp->segments->extent_count = lv->size;
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comp->segments->layout = 0;
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@@ -574,15 +582,26 @@ make_vg (grub_disk_t disk,
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comp->segments->layout = GRUB_RAID_LAYOUT_SYMMETRIC_MASK;
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}
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else
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- goto fail2;
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+ {
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+ grub_free (comp->segments);
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+ grub_free (comp->internal_id);
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+ grub_free (comp);
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+ goto fail2;
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+ }
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ptr += *ptr + 1;
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ptr++;
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if (!(vblk[i].flags & 0x10))
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- goto fail2;
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+ {
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+ grub_free (comp->segments);
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+ grub_free (comp->internal_id);
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+ grub_free (comp);
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+ goto fail2;
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+ }
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if (ptr >= vblk[i].dynamic + sizeof (vblk[i].dynamic)
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|| ptr + *ptr + 1 >= vblk[i].dynamic
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+ sizeof (vblk[i].dynamic))
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{
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+ grub_free (comp->segments);
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grub_free (comp->internal_id);
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grub_free (comp);
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goto fail2;
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@@ -592,6 +611,7 @@ make_vg (grub_disk_t disk,
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if (ptr + *ptr + 1 >= vblk[i].dynamic
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+ sizeof (vblk[i].dynamic))
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{
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+ grub_free (comp->segments);
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grub_free (comp->internal_id);
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grub_free (comp);
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goto fail2;
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@@ -601,7 +621,12 @@ make_vg (grub_disk_t disk,
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comp->segments->nodes = grub_calloc (comp->segments->node_alloc,
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sizeof (*comp->segments->nodes));
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if (!lv->segments->nodes)
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- goto fail2;
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+ {
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+ grub_free (comp->segments);
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+ grub_free (comp->internal_id);
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+ grub_free (comp);
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+ goto fail2;
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+ }
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}
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if (lv->segments->node_alloc == lv->segments->node_count)
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@@ -611,11 +636,23 @@ make_vg (grub_disk_t disk,
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if (grub_mul (lv->segments->node_alloc, 2, &lv->segments->node_alloc) ||
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grub_mul (lv->segments->node_alloc, sizeof (*lv->segments->nodes), &sz))
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- goto fail2;
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+ {
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+ grub_free (comp->segments->nodes);
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+ grub_free (comp->segments);
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+ grub_free (comp->internal_id);
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+ grub_free (comp);
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+ goto fail2;
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+ }
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t = grub_realloc (lv->segments->nodes, sz);
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if (!t)
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- goto fail2;
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+ {
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+ grub_free (comp->segments->nodes);
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+ grub_free (comp->segments);
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+ grub_free (comp->internal_id);
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+ grub_free (comp);
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+ goto fail2;
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+ }
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lv->segments->nodes = t;
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}
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lv->segments->nodes[lv->segments->node_count].pv = 0;
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