From mboxrd@z Thu Jan  1 00:00:00 1970
From: Guenter Roeck <linux@roeck-us.net>
Subject: Re: linux-next: Tree for Jan 20 -- Kernel panic - Unable to mount
 root fs
Date: Tue, 20 Jan 2015 18:44:34 -0800
Message-ID: <54BF1292.2080902@roeck-us.net>
References: <20150120165655.GA10904@kria> <20150120232726.GA16913@kria> <1517211.UYLV49hvpg@sifl> <1528536.jyty2pu4Mz@sifl> <20150121004117.GM29656@ZenIV.linux.org.uk>
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Cc: Sabrina Dubroca <sd@queasysnail.net>,
	Stephen Rothwell <sfr@canb.auug.org.au>,
	linux-next@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-fsdevel@vger.kernel.org, linux-audit@redhat.com,
	Richard Guy Briggs <rgb@redhat.com>
To: Al Viro <viro@ZenIV.linux.org.uk>, Paul Moore <pmoore@redhat.com>
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On 01/20/2015 04:41 PM, Al Viro wrote:

> The shit hits the fan earlier - when we end up missing /dev.  There are
> two places where it could've been created (depending on CONFIG_BLK_DEV_INITRD);
> 	sys_mkdir(collected, mode);
> in init/initramfs.c (line 353 in linux-next) and
>          err = sys_mkdir((const char __user __force *) "/dev", 0755);
> in init/noinitramfs.c (line 32).  The latter would've screamed on failure;
> could you printk of collected (%s), mode (%o) and return value (%d) in the
> former and see what happens?
>

sys_mkdir .:40775 returned -17
sys_mkdir usr:40775 returned 0
sys_mkdir usr/lib:40775 returned -2
sys_mkdir usr/share:40755 returned -2
sys_mkdir usr/share/udhcpc:40755 returned -2
sys_mkdir usr/bin:40775 returned -2
sys_mkdir usr/sbin:40775 returned -2
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 -2
sys_mkdir lib/modules/3.9.2:40775 returned -2
sys_mkdir lib/modules/3.9.2/kernel:40775 returned -2

with
	int err = sys_mkdir(collected, mode);
	pr_info("sys_mkdir %s:%o returned %d\n", collected, mode, err);
added in init/initramfs.c.

Guenter