From c4047a30fc81715ae56e97f983fd684360fa216c Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Wed, 22 Jan 2014 19:36:57 +0100 Subject: fuse: fix pipe_buf_operations commit 28a625cbc2a14f17b83e47ef907b2658576a32aa upstream. Having this struct in module memory could Oops when if the module is unloaded while the buffer still persists in a pipe. Since sock_pipe_buf_ops is essentially the same as fuse_dev_pipe_buf_steal merge them into nosteal_pipe_buf_ops (this is the same as default_pipe_buf_ops except stealing the page from the buffer is not allowed). Reported-by: Al Viro Signed-off-by: Miklos Szeredi [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings --- include/linux/pipe_fs_i.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h index 0072a5366e97..8778c26c942e 100644 --- a/include/linux/pipe_fs_i.h +++ b/include/linux/pipe_fs_i.h @@ -160,6 +160,8 @@ int generic_pipe_buf_confirm(struct pipe_inode_info *, struct pipe_buffer *); int generic_pipe_buf_steal(struct pipe_inode_info *, struct pipe_buffer *); void generic_pipe_buf_release(struct pipe_inode_info *, struct pipe_buffer *); +extern const struct pipe_buf_operations nosteal_pipe_buf_ops; + /* for F_SETPIPE_SZ and F_GETPIPE_SZ */ long pipe_fcntl(struct file *, unsigned int, unsigned long arg); struct pipe_inode_info *get_pipe_info(struct file *file); -- cgit v1.2.3