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block: allow creation of fixed vhdx images

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When trying to create a fixed vhd image qemu-img will return the
following error:

 qemu-img: test.vhdx: Could not create image: Cannot allocate memory

This happens because of a incorrect check in vhdx.c. Specifficaly,
in vhdx_create_bat(), after allocating memory for the BAT entry,
there is a check to determine if the allocation was unsuccsessful.
The error comes from the fact that it checks if s->bat isn't NULL,
which is true in case of succsessful allocation,  and exits with
error ENOMEM.

Signed-off-by: Adelina Tuvenie <atuvenie@cloudbasesolutions.com>
Acked-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Adelina Tuvenie 2014-09-18 18:17:44 +03:00 committed by Michael Tokarev
parent 4d63322cd4
commit a011898d25
1 changed files with 1 additions and 1 deletions
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2
block/vhdx.c
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@ -1593,7 +1593,7 @@ static int vhdx_create_bat(BlockDriverState *bs, BDRVVHDXState *s,
bdrv_has_zero_init(bs) == 0) { bdrv_has_zero_init(bs) == 0) {
/* for a fixed file, the default BAT entry is not zero */ /* for a fixed file, the default BAT entry is not zero */
s->bat = g_try_malloc0(length); s->bat = g_try_malloc0(length);
if (length && s->bat != NULL) { if (length && s->bat == NULL) {
ret = -ENOMEM; ret = -ENOMEM;
goto exit; goto exit;
} }