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 raw-posix block driver.
Signed-off-by: Kevin Wolf <kw...@redhat.com>
---
block/raw-posix.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/block/raw-posix.c b/block/raw-posix.c
index 6586a0c..459f197 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -753,7 +753,11 @@ static ssize_t handle_aiocb_rw(RawPosixAIOData *aiocb)
* Ok, we have to do it the hard way, copy all segments into
* a single aligned buffer.
*/
- buf = qemu_blockalign(aiocb->bs, aiocb->aio_nbytes);
+ buf = qemu_try_blockalign(aiocb->bs, aiocb->aio_nbytes);
+ if (buf == NULL) {
+ return -ENOMEM;
+ }
+
if (aiocb->aio_type & QEMU_AIO_WRITE) {
char *p = buf;
int i;
--
1.8.3.1
