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qemu-img: Fix crash in amend invocation 

Example:
$ ./qemu-img create -f qcow2 /tmp/t.qcow2 64M
$ ./qemu-img amend -f qcow2 -o backing_file=/tmp/t.qcow2, -o help \
    /tmp/t.qcow2

This should not crash. This actually is tested by iotest 082, but not
caught due to the segmentation fault being silent (which is something
that needs to be fixed, too).

Reported-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: qemu-stable <qemu-stable@nongnu.org>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Max Reitz 2015-08-20 16:00:38 -07:00 committed by Kevin Wolf
parent bdd03cdf5d
commit e814dffcc9
1 changed files with 2 additions and 1 deletions
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3
qemu-img.c
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@ -2931,7 +2931,7 @@ static int img_amend(int argc, char **argv)
if (!is_valid_option_list(optarg)) {
error_report("Invalid option list: %s", optarg);
ret = -1;
goto out;
goto out_no_progress;
}
if (!options) {
options = g_strdup(optarg);
@ -3031,6 +3031,7 @@ static int img_amend(int argc, char **argv)
out:
qemu_progress_end();
out_no_progress:
blk_unref(blk);
qemu_opts_del(opts);
qemu_opts_free(create_opts);