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| author | Kevin Wolf <kwolf@redhat.com> | 2014-05-20 13:56:27 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2014-08-15 15:07:16 +0200 |
| commit | d6e5993197990ff55c660714526681fa7028299e (patch) | |
| tree | a0770405024e37cfd8ecc5644c225ebdec1ef782 | |
| parent | a67e128a4f40cf07abd86f92d0d3c913db2ad885 (diff) | |
| download | focaccia-qemu-d6e5993197990ff55c660714526681fa7028299e.tar.gz focaccia-qemu-d6e5993197990ff55c660714526681fa7028299e.zip | |
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>
| -rw-r--r-- | block/vmdk.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/block/vmdk.c b/block/vmdk.c index 3700a11f5f..01412a8939 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -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, |