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-rw-r--r--fs/attr.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/attr.c b/fs/attr.c
index 765fc75fab3..26c71ba1eed 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -108,6 +108,11 @@ int notify_change(struct dentry * dentry, struct iattr * attr)
struct timespec now;
unsigned int ia_valid = attr->ia_valid;
+ if (ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID | ATTR_TIMES_SET)) {
+ if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+ return -EPERM;
+ }
+
now = current_fs_time(inode->i_sb);
attr->ia_ctime = now;