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vmdk: Handle failure for potentially large allocations 

Some code in the block layer makes potentially huge allocations. Failure
is not completely unexpected there, so avoid aborting qemu and handle
out-of-memory situations gracefully.

This patch addresses the allocations in the vmdk block driver.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
This commit is contained in:
Kevin Wolf 2014-05-20 13:56:27 +02:00
parent a67e128a4f
commit d6e5993197
1 changed files with 10 additions and 2 deletions
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12
block/vmdk.c
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@ -456,7 +456,11 @@ static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent,
/* read the L1 table */
l1_size = extent->l1_size * sizeof(uint32_t);
extent->l1_table = g_malloc(l1_size);
extent->l1_table = g_try_malloc(l1_size);
if (l1_size && extent->l1_table == NULL) {
return -ENOMEM;
}
ret = bdrv_pread(extent->file,
extent->l1_table_offset,
extent->l1_table,
@ -472,7 +476,11 @@ static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent,
}
if (extent->l1_backup_table_offset) {
extent->l1_backup_table = g_malloc(l1_size);
extent->l1_backup_table = g_try_malloc(l1_size);
if (l1_size && extent->l1_backup_table == NULL) {
ret = -ENOMEM;
goto fail_l1;
}
ret = bdrv_pread(extent->file,
extent->l1_backup_table_offset,
extent->l1_backup_table,