| Message ID | 20200831082737.10983-3-jasowang@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | refine vhost-vdpa initialization | expand |
On 31/08/2020 10:27, Jason Wang wrote: > vhost-dev is mandatory for vhost-vdpa to be initialized otherwise > net_vhost_vdpa_init will pass an uninitialized pointer to qemu_open() > which will lead a SIGSEV: > > #0 0x0000555555c3a640 in strstart (str=str@entry=0x0, val=val@entry=0x555555dbcb65 "/dev/fdset/", ptr=ptr@entry=0x7fffffffdfb8) at ../util/cutils.c:77 > #1 0x0000555555c572a7 in qemu_open (name=name@entry=0x0, flags=flags@entry=2) at ../util/osdep.c:294 > #2 0x000055555584314a in net_vhost_vdpa_init (device=0x555555c81baa "vhost-vdpa", vhostdev=0x0, name=0x555556396600 "hn0", peer=0x0) at ../net/vhost-vdpa.c:187 > #3 0x000055555584314a in net_init_vhost_vdpa (netdev=<optimized out>, name=0x555556396600 "hn0", peer=0x0, errp=<optimized out>) at ../net/vhost-vdpa.c:227 > #4 0x000055555587e8c9 in net_client_init1 (netdev=0x555556398790, is_netdev=is_netdev@entry=true, errp=errp@entry=0x7fffffffe290) at ../net/net.c:1008 > #5 0x000055555587ecc7 in net_client_init (opts=0x555556192ff0, is_netdev=<optimized out>, errp=0x7fffffffe290) at ../net/net.c:1113 > #6 0x0000555555c33082 in qemu_opts_foreach > (list=<optimized out>, func=func@entry=0x55555587ed50 <net_init_netdev>, opaque=opaque@entry=0x0, errp=errp@entry=0x7fffffffe290) at ../util/qemu-option.c:1172 > #7 0x0000555555880057 in net_init_clients (errp=errp@entry=0x7fffffffe290) at ../net/net.c:1494 > #8 0x0000555555a7f8e9 in qemu_init (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at ../softmmu/vl.c:4250 > #9 0x00005555557f26cd in main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at ../softmmu/main.c:49 > > Cc: qemu-stable@nongnu.org > Signed-off-by: Jason Wang <jasowang@redhat.com> > --- > net/vhost-vdpa.c | 6 +++++- > 1 file changed, 5 insertions(+), 1 deletion(-) > > diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c > index bc0e0d2d35..b7221beaa1 100644 > --- a/net/vhost-vdpa.c > +++ b/net/vhost-vdpa.c > @@ -206,7 +206,7 @@ static int net_vhost_check_net(void *opaque, QemuOpts *opts, Error **errp) > } > if (strcmp(netdev, name) == 0 && > !g_str_has_prefix(driver, "virtio-net-")) { > - error_setg(errp, "vhost-vdpa requires frontend driver virtio-net-*"); > + error_setg(errp, "Vhost-vdpa requires frontend driver virtio-net-*"); > return -1; > } > return 0; > @@ -224,5 +224,9 @@ int net_init_vhost_vdpa(const Netdev *netdev, const char *name, > (char *)name, errp)) { > return -1; > } > + if (!opts->has_vhostdev) { > + error_setg(errp, "vhost-vdpa requires vhostdev to be set"); > + return -1; > + } Useless if you remove the '*' in qapi/net.json. Thanks, Laurent
diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index bc0e0d2d35..b7221beaa1 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -206,7 +206,7 @@ static int net_vhost_check_net(void *opaque, QemuOpts *opts, Error **errp) } if (strcmp(netdev, name) == 0 && !g_str_has_prefix(driver, "virtio-net-")) { - error_setg(errp, "vhost-vdpa requires frontend driver virtio-net-*"); + error_setg(errp, "Vhost-vdpa requires frontend driver virtio-net-*"); return -1; } return 0; @@ -224,5 +224,9 @@ int net_init_vhost_vdpa(const Netdev *netdev, const char *name, (char *)name, errp)) { return -1; } + if (!opts->has_vhostdev) { + error_setg(errp, "vhost-vdpa requires vhostdev to be set"); + return -1; + } return net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, opts->vhostdev); }
vhost-dev is mandatory for vhost-vdpa to be initialized otherwise net_vhost_vdpa_init will pass an uninitialized pointer to qemu_open() which will lead a SIGSEV: #0 0x0000555555c3a640 in strstart (str=str@entry=0x0, val=val@entry=0x555555dbcb65 "/dev/fdset/", ptr=ptr@entry=0x7fffffffdfb8) at ../util/cutils.c:77 #1 0x0000555555c572a7 in qemu_open (name=name@entry=0x0, flags=flags@entry=2) at ../util/osdep.c:294 #2 0x000055555584314a in net_vhost_vdpa_init (device=0x555555c81baa "vhost-vdpa", vhostdev=0x0, name=0x555556396600 "hn0", peer=0x0) at ../net/vhost-vdpa.c:187 #3 0x000055555584314a in net_init_vhost_vdpa (netdev=<optimized out>, name=0x555556396600 "hn0", peer=0x0, errp=<optimized out>) at ../net/vhost-vdpa.c:227 #4 0x000055555587e8c9 in net_client_init1 (netdev=0x555556398790, is_netdev=is_netdev@entry=true, errp=errp@entry=0x7fffffffe290) at ../net/net.c:1008 #5 0x000055555587ecc7 in net_client_init (opts=0x555556192ff0, is_netdev=<optimized out>, errp=0x7fffffffe290) at ../net/net.c:1113 #6 0x0000555555c33082 in qemu_opts_foreach (list=<optimized out>, func=func@entry=0x55555587ed50 <net_init_netdev>, opaque=opaque@entry=0x0, errp=errp@entry=0x7fffffffe290) at ../util/qemu-option.c:1172 #7 0x0000555555880057 in net_init_clients (errp=errp@entry=0x7fffffffe290) at ../net/net.c:1494 #8 0x0000555555a7f8e9 in qemu_init (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at ../softmmu/vl.c:4250 #9 0x00005555557f26cd in main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at ../softmmu/main.c:49 Cc: qemu-stable@nongnu.org Signed-off-by: Jason Wang <jasowang@redhat.com> --- net/vhost-vdpa.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)