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raw-posix: Handle failure for potentially large allocations

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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 <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Kevin Wolf 2014-05-21 18:02:42 +02:00
parent 4f4896db5f
commit 50d4a858e6
1 changed files with 5 additions and 1 deletions
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6
block/raw-posix.c
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@ -798,7 +798,11 @@ 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;