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[Qemu-devel] [PATCH] virtio-9p: Check the return value of llistxattr.


From: Kusanagi Kouichi
Subject: [Qemu-devel] [PATCH] virtio-9p: Check the return value of llistxattr.
Date: Sat, 30 Oct 2010 11:52:39 +0900
User-agent: Mutt/1.5.20 (2009-06-14)

If llistxattr returned 0, qemu aborts.

Signed-off-by: Kusanagi Kouichi <address@hidden>
---
 hw/virtio-9p-xattr.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/hw/virtio-9p-xattr.c b/hw/virtio-9p-xattr.c
index 175f372..1aab081 100644
--- a/hw/virtio-9p-xattr.c
+++ b/hw/virtio-9p-xattr.c
@@ -73,6 +73,9 @@ ssize_t v9fs_list_xattr(FsContext *ctx, const char *path,
 
     /* Get the actual len */
     xattr_len = llistxattr(rpath(ctx, path), value, 0);
+    if (xattr_len <= 0) {
+        return xattr_len;
+    }
 
     /* Now fetch the xattr and find the actual size */
     orig_value = qemu_malloc(xattr_len);
-- 
1.7.2.3




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