Re: linux-next: Tree for Jan 20 -- Kernel panic - Unable to mount root fs

Al Viro
2015-01-21T04:36:38Z

On Tue, Jan 20, 2015 at 08:01:26PM -0800, Guenter Roeck wrote:
> With this patch:
>
> sys_mkdir .:40775 returned -17
> sys_mkdir usr:40775 returned 0
> sys_mkdir usr/lib:40775 returned 0
> sys_mkdir usr/share:40755 returned 0
> sys_mkdir usr/share/udhcpc:40755 returned 0
> sys_mkdir usr/bin:40775 returned 0
> sys_mkdir usr/sbin:40775 returned 0
> sys_mkdir mnt:40775 returned 0
> sys_mkdir proc:40775 returned 0
> sys_mkdir root:40775 returned 0
> sys_mkdir lib:40775 returned 0
> sys_mkdir lib/modules:40775 returned 0
> ...
>
> and the problem is fixed.

... except that it simply confirms that something's fishy with getname_kernel()
of ->name of struct filename returned by getname(). IOW, I still do not
understand the mechanism of breakage there.

Another thing I really do not understand is
+ if (inode->i_ino) {
+ /* valid inode number, use that for the comparison */
+ if (n->ino != inode->i_ino ||
+ n->dev != inode->i_sb->s_dev)
+ continue;
in __audit_inode(). We don't *have* dentries with dentry->d_inode->i_ino == 0.
Ever. WTF is that about? Paul?