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[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
*fs_path,
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;
}
--
1.8.1.2
- [Qemu-devel] [PATCH] hw/9pfs: use O_NOFOLLOW for mapped readlink operation,
Aneesh Kumar K.V <=