block/ssh: fix possible segmentation fault when .desc is not null-terminated
commitfbd5c4c0db47e578e3fdd88a0ebc4314a1ed3d42
authorMurilo Opsfelder Araujo <muriloo@linux.vnet.ibm.com>
Fri, 5 Jan 2018 14:44:40 +0000 (5 12:44 -0200)
committerJeff Cody <jcody@redhat.com>
Thu, 1 Feb 2018 03:37:00 +0000 (31 22:37 -0500)
tree3f66f7ffd794de0387b67615cbd83678738d0931
parentb05631954d6dfe93340d516660397e2c1a2a5dd6
block/ssh: fix possible segmentation fault when .desc is not null-terminated

This patch prevents a possible segmentation fault when .desc members are checked
against NULL.

The ssh_runtime_opts was added by commit
8a6a80896d6af03b8ee0c17cdf37219eca2588a7 ("block/ssh: Use QemuOpts for runtime
options").

This fix was inspired by
http://lists.nongnu.org/archive/html/qemu-devel/2018-01/msg00883.html.

Fixes: 8a6a80896d6af03b8ee0c17cdf37219eca2588a7 ("block/ssh: Use QemuOpts for runtime options")
Cc: Max Reitz <mreitz@redhat.com>
Cc: Eric Blake <eblake@redhat.com>
Signed-off-by: Murilo Opsfelder Araujo <muriloo@linux.vnet.ibm.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Jeff Cody <jcody@redhat.com>
block/ssh.c