[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Qemu-devel] [PATCH] hw/9pfs: use O_NOFOLLOW for mapped readlink operati

From: Aneesh Kumar K.V
Subject: [Qemu-devel] [PATCH] hw/9pfs: use O_NOFOLLOW for mapped readlink operation
Date: Mon, 20 May 2013 23:04:29 +0530

From: "Aneesh Kumar K.V" <address@hidden>

With mapped security models like mapped-xattr and mapped-file, we save the
symlink target as file contents. Now if we ever expose a normal directory
with mapped security model and find real symlinks in export path, never
follow them and return proper error.

Signed-off-by: Aneesh Kumar K.V <address@hidden>
 hw/9pfs/virtio-9p-local.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/9pfs/virtio-9p-local.c b/hw/9pfs/virtio-9p-local.c
index 6ece6f7..87aa75d 100644
--- a/hw/9pfs/virtio-9p-local.c
+++ b/hw/9pfs/virtio-9p-local.c
@@ -284,7 +284,7 @@ static ssize_t local_readlink(FsContext *fs_ctx, V9fsPath 
     if ((fs_ctx->export_flags & V9FS_SM_MAPPED) ||
         (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE)) {
         int fd;
-        fd = open(rpath(fs_ctx, path, buffer), O_RDONLY);
+        fd = open(rpath(fs_ctx, path, buffer), O_RDONLY | O_NOFOLLOW);
         if (fd == -1) {
             return -1;

reply via email to

[Prev in Thread] Current Thread [Next in Thread]