fuse: limit nsec

commit 47912ea upstream. Limit nanoseconds to 0..999999999. Fixes: d8a5ba4 ("[PATCH] FUSE - core") Cc: <[email protected]> Signed-off-by: Miklos Szeredi <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
tobetter · Aug 17, 2022 · daa9cfb · daa9cfb
1 parent a54c509
commit daa9cfb
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
@@ -181,6 +181,12 @@ void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr,
 	inode->i_uid     = make_kuid(fc->user_ns, attr->uid);
 	inode->i_gid     = make_kgid(fc->user_ns, attr->gid);
 	inode->i_blocks  = attr->blocks;
+
+	/* Sanitize nsecs */
+	attr->atimensec = min_t(u32, attr->atimensec, NSEC_PER_SEC - 1);
+	attr->mtimensec = min_t(u32, attr->mtimensec, NSEC_PER_SEC - 1);
+	attr->ctimensec = min_t(u32, attr->ctimensec, NSEC_PER_SEC - 1);
+
 	inode->i_atime.tv_sec   = attr->atime;
 	inode->i_atime.tv_nsec  = attr->atimensec;
 	/* mtime from server may be stale due to local buffered write */