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9pfs: fix crash when fsdev is missing

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If the user passes -device virtio-9p without the corresponding -fsdev, QEMU
dereferences a NULL pointer and crashes.

This is a 2.8 regression introduced by commit 702dbcc274.

Signed-off-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
This commit is contained in:
Greg Kurz 2017-01-03 17:28:44 +01:00
parent 88da0b0301
commit f2b58c4375
1 changed files with 1 additions and 1 deletions
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2
hw/9pfs/9p.c
View file

@ -3525,7 +3525,7 @@ int v9fs_device_realize_common(V9fsState *s, Error **errp)
rc = 0; rc = 0;
out: out:
if (rc) { if (rc) {
if (s->ops->cleanup && s->ctx.private) { if (s->ops && s->ops->cleanup && s->ctx.private) {
s->ops->cleanup(&s->ctx); s->ops->cleanup(&s->ctx);
} }
g_free(s->tag); g_free(s->tag);