From 037d32aa8f748e39844d2a5b607fb063b4583843 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Mon, 24 Oct 2016 00:01:43 -0300 Subject: Linux-libre 4.8.4-gnu --- fs/attr.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'fs/attr.c') diff --git a/fs/attr.c b/fs/attr.c index 42bb42bb3..3c42cab06 100644 --- a/fs/attr.c +++ b/fs/attr.c @@ -202,6 +202,21 @@ int notify_change(struct dentry * dentry, struct iattr * attr, struct inode **de return -EPERM; } + /* + * If utimes(2) and friends are called with times == NULL (or both + * times are UTIME_NOW), then we need to check for write permission + */ + if (ia_valid & ATTR_TOUCH) { + if (IS_IMMUTABLE(inode)) + return -EPERM; + + if (!inode_owner_or_capable(inode)) { + error = inode_permission(inode, MAY_WRITE); + if (error) + return error; + } + } + if ((ia_valid & ATTR_MODE)) { umode_t amode = attr->ia_mode; /* Flag setting protected by i_mutex */ -- cgit v1.2.3-54-g00ecf