On Mon, 11 Dec 2006 03:27:37 -0500
Chuck Ebbert <[email protected]> wrote:
> Prevent oops when an app tries to create a pipe while pipefs
> is not mounted.
>
> Signed-off-by: Chuck Ebbert <[email protected]>
>
> --- 2.6.19.1-pre1-32.orig/fs/pipe.c
> +++ 2.6.19.1-pre1-32/fs/pipe.c
> @@ -839,9 +839,11 @@ static struct dentry_operations pipefs_d
>
> static struct inode * get_pipe_inode(void)
> {
> - struct inode *inode = new_inode(pipe_mnt->mnt_sb);
> + struct inode *inode = NULL;
> struct pipe_inode_info *pipe;
>
> + if (pipe_mnt)
> + inode = new_inode(pipe_mnt->mnt_sb);
> if (!inode)
> goto fail_inode;
>
That's pretty lame. It means that pipes just won't work, so people who are
using pipes in their initramfs setups will just get mysterious failures
running userspace on a crippled kernel.
I think the bug really is the running of populate_rootfs() before running
the initcalls, in init/main.c:init(). It's just more sensible to start
running userspace after the initcalls have been run. Statically-linked
drivers which want to load firmware files will lose. To fix that we'd need
a new callback. It could be with a new linker section or perhaps simply a
notifier chain.
-
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