kernel panic - not syncing no init found. try passing init= option to

Dear all,

I am engineering student.I am trying to build linux distro for programming enivironment from debian based distro.

I can succesfull build rootfs,after making ISO I am getting error"kernel panic - not syncing no init found. try passing init= option to kernel..."

Init content is;
==============
link bin/busybox

build_rootfs.sh content;
==================

PHP Code:

---

#!/bin/bash -eu
# Build the initramfs, a basic system that is used by the #kernel as init
# filesystem - also called 'rootfs'

echo "# Building rootfs"

startup_dir=$(pwd)
cd $(dirname $0)/../
BASE_DIR=$(pwd)
ROOTFS_DIR=$BASE_DIR/var/rootfs
TEMPFILE=$(tempfile)

function fun_mknod {
    if [ ! -e "$1" ]; then
        fakeroot -i $TEMPFILE -s $TEMPFILE mknod $@
    fi
}

# create devices
echo "## Creating devices"
fun_mknod $ROOTFS_DIR/dev/console c 5 1
chmod a+rw $ROOTFS_DIR/dev/console
fun_mknod $ROOTFS_DIR/dev/null c 1 3
fun_mknod $ROOTFS_DIR/dev/ram b 1 1
fun_mknod $ROOTFS_DIR/dev/systty c 4 0
fun_mknod $ROOTFS_DIR/dev/tty c 5 0
for i in 1 2 3 4 5 6; do
    fun_mknod $ROOTFS_DIR/dev/tty$i c 4 $i
done

chmod a+rw $ROOTFS_DIR/dev/tty*

# generate module dependencies
KERNEL_NAME="$(strings $BASE_DIR/install_cd/isolinux/bzImage \
    | grep CLinux \
    | cut -d' ' -f1)"
mkdir -p $ROOTFS_DIR/lib/modules/$KERNEL_NAME
/sbin/depmod --basedir $ROOTFS_DIR -v $KERNEL_NAME

# attach bootsplash image
echo "## Attaching bootsplash image"
cd $BASE_DIR/var/rootfs/boot/CLinux/
$BASE_DIR/bin/splash -s -f bootsplash.cfg \
    > $ROOTFS_DIR/bootsplash

# create rootfs filesystem
if [ -f "$BASE_DIR/install_cd/isolinux/rootfs" ]; then
    echo "## Removing old rootfs filesystem"
    rm -f $BASE_DIR/install_cd/isolinux/rootfs
fi
echo "## Creating rootfs filesystem"
cd $ROOTFS_DIR
find . -not -wholename \*.svn\* \
    | fakeroot -i $TEMPFILE cpio -o -H newc \
    | gzip \
    > $BASE_DIR/install_cd/isolinux/rootfs

# clean
echo "## Cleaning"
rm $ROOTFS_DIR/bootsplash
rm $ROOTFS_DIR/dev/*
#rm -R $ROOTFS_DIR/lib/modules
rm $TEMPFILE 


---

ISOlinux.cfg content is

PHP Code:

---

default vesamenu.c32
prompt 0
menu hshift 13
menu width 49

menu title CLinux boot menu

label install
    menu label Install CLinux
    kernel bzImage
    append raid=noautodetect initrd=rootfs rw vga=791 

menu end 


---

anyone can help ..pls

I've never done this so can't help with the first part but, your isolinux file doesn't look right. Where is the bzImage file? If you look at a standard isolinux.cfg it will show the path preceded by a forward slash so if your bzImage is actually in the root of the filesystem your would need: kernel /bzImage. If it is somewhere else, you would need the path to where it is. The same for the initrd entry if it is in the root of the filesystem as your entry shows: initrd=/rootfs.

Your script seems to indicate the rootfs is in isolinux??

Thanks for ur reply.

yes,both bzimage and rootfs is in isolinux folder..

Whilst I have not run your script, one thing come to mind; have you unpacked the initrd and verified that init is in fact present?

Secondly, the thread is marked as [SOLVED], if so, drop in a line or two about what solved it for future reference, otherwise the heading should be changed :)

HTML Code:

---

have you unpacked the initrd and verified that init is in fact present?

---

yes,init is there inside rootfs and content of init is "link bin/busybox"......

The idea is to use the rootfs from buildroot as the initrd (i.e. initrd=rootfs).Inside the initrd (ie rootfs) is /bin/busybox which will be read first
by the kernel after mounting the initrd.

any help???????

details of error..

PHP Code:

---

Failed to execute /init.
kernel panic-not syncing: No init foud.Try passing init=option to kernel.
pid: 1,comm:swapper Not tainted-linux #4
call trace:
[<c193fa25>] ? printk+0x18/0x1a
[<c193f973>] panic+0x43/0xd
[<c100134d>] init_post+0xad/0x100
[<c1d82377>] kernel_init+0x160/0x169
[<c1d82317>] ? kernel_init+0x0/0x169
[<c1003a27>] kernel_thread_helper+0x7/0x10
atkbd.c:spurious NAK on isa0060/serio0.Some program might be trying access hardware directly. 


---

my content of /init is "link bin/busybox" and content of /sbin/int is ,

PHP Code:

---

mount /proc

exec /usr/sbin/chroot . /bin/busybox init < /dev/console > /dev/console 


---

pls someone help me..thanks