From 5ddd9ced9aef6cfa76af27d384c17c9e2d610ce8 Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Tue, 19 May 2020 14:50:38 +0200 Subject: fuse: update attr_version counter on fuse_notify_inval_inode() A GETATTR request can race with FUSE_NOTIFY_INVAL_INODE, resulting in the attribute cache being updated with stale information after the invalidation. Fix this by bumping the attribute version in fuse_reverse_inval_inode(). Reported-by: Krzysztof Rusek Signed-off-by: Miklos Szeredi --- fs/fuse/inode.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'fs/fuse') diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index 6fae66cc096a..5b4aebf5821f 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -321,6 +321,8 @@ struct inode *fuse_iget(struct super_block *sb, u64 nodeid, int fuse_reverse_inval_inode(struct super_block *sb, u64 nodeid, loff_t offset, loff_t len) { + struct fuse_conn *fc = get_fuse_conn_super(sb); + struct fuse_inode *fi; struct inode *inode; pgoff_t pg_start; pgoff_t pg_end; @@ -329,6 +331,11 @@ int fuse_reverse_inval_inode(struct super_block *sb, u64 nodeid, if (!inode) return -ENOENT; + fi = get_fuse_inode(inode); + spin_lock(&fi->lock); + fi->attr_version = atomic64_inc_return(&fc->attr_version); + spin_unlock(&fi->lock); + fuse_invalidate_attr(inode); forget_all_cached_acls(inode); if (offset >= 0) { -- cgit v1.2.3