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

[new2linus]

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;
==================

 #!/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

 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 
  

[new2linus]

anyone can help ..pls

[yancek]

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??

[new2linus]

Thanks for ur reply.

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

[henrikau]

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

[new2linus]

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.

[new2linus]

any help???????

[new2linus]

details of error..

 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 ,

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

pls someone help me..thanks