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qemu-img: assert block_job_get() does not return NULL in img_commit()

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Although the function block_job_get() can return NULL, it would be a
serious bug if it did so (because the job yields before executing anything
(if it started successfully); but otherwise, commit_active_start() would
have returned an error).  However, as a precaution, before dereferencing
the 'job' pointer in img_commit() assert it is not NULL.

Signed-off-by: Liam Merwick <Liam.Merwick@oracle.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 1541453919-25973-4-git-send-email-Liam.Merwick@oracle.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Liam Merwick 2018-11-05 21:38:37 +00:00 committed by Max Reitz
parent 602414d123
commit 2e2db26009
1 changed files with 1 additions and 0 deletions
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qemu-img.c
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@ -1029,6 +1029,7 @@ static int img_commit(int argc, char **argv)
} }
job = block_job_get("commit"); job = block_job_get("commit");
assert(job);
run_block_job(job, &local_err); run_block_job(job, &local_err);
if (local_err) { if (local_err) {
goto unref_backing; goto unref_backing;