Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
fuse: zero initialize inode private data
This is slightly tricky, since the VFS uses non-zeroing allocation to
preserve some fields that are left in a consistent state.
Reported-by: Chunsheng Luo <luochunsheng@ustc.edu>
Closes: https://lore.kernel.org/all/20250818083224.229-1-luochunsheng@ustc.edu/
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
+4
-7
+4
-7
fs/fuse/inode.c
+4
-7
fs/fuse/inode.c
···
101
101
if (!fi)
102
102
return NULL;
103
103
104
-
fi->i_time = 0;
104
+
/* Initialize private data (i.e. everything except fi->inode) */
105
+
BUILD_BUG_ON(offsetof(struct fuse_inode, inode) != 0);
106
+
memset((void *) fi + sizeof(fi->inode), 0, sizeof(*fi) - sizeof(fi->inode));
107
+
105
108
fi->inval_mask = ~0;
106
-
fi->nodeid = 0;
107
-
fi->nlookup = 0;
108
-
fi->attr_version = 0;
109
-
fi->orig_ino = 0;
110
-
fi->state = 0;
111
-
fi->submount_lookup = NULL;
112
109
mutex_init(&fi->mutex);
113
110
spin_lock_init(&fi->lock);
114
111
fi->forget = fuse_alloc_forget();