Red Hat Bugzilla – Bug 185233
kernel 2041 panics when switching root on boot.
Last modified: 2008-05-06 11:35:11 EDT
Description of problem: When booting into kernel 2.6.15-1.2041_FC5, the following error occurs: Switching to new root switchroot: new root mount point expected Kernel Panic - not syncing: Attempted to kill init! [<c011a312>] panic+0x3e/0x170 [<c011cec2>] do_exit+0x71/0x6c8 [<c0145fc9>] do_munmap+0x184/0x19e [<c011d59d>] sys_exit_group+0x0/0xd [<c0102bc1>] syscall_call+0x7/0xb Version-Release number of selected component (if applicable): Rawhide - kernel-2.6.15-1.2041_FC5 How reproducible: Happens on every boot. Steps to Reproduce: 1. Install fresh FC4 from DVD. 2. Update all packages via fedora-released updates 3. Update to rawhide (aka fedora-devel/fedora-extras-devel) 4. Update kernel to latest at this point in time 5. Machine will crash on boot.
The system boot off an IDE drive (/dev/hda1). it has 4 x 300Gb SATA drives in software RAID5. $ cat /etc/fstab LABEL=/ / ext3 defaults 1 1 /dev/devpts /dev/pts devpts gid=5,mode=620 0 0 /dev/shm /dev/shm tmpfs defaults 0 0 LABEL=/home /home ext3 defaults 1 2 /dev/md0 /mnt/raid ext3 defaults 1 2 /dev/proc /proc proc defaults 0 0 /dev/sys /sys sysfs defaults 0 0 $ cat /boot/grub/device.map # this device map was generated by anaconda (fd0) /dev/fd0 (hd0) /dev/hda $ cat /boot/grub/menu.lst # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You do not have a /boot partition. This means that # all kernel and initrd paths are relative to /, eg. # root (hd0,0) # kernel /boot/vmlinuz-version ro root=/dev/hda1 # initrd /boot/initrd-version.img #boot=/dev/hda default=1 timeout=5 splashimage=(hd0,0)/boot/grub/splash.xpm.gz hiddenmenu title Fedora Core (2.6.15-1.2041_FC5) root (hd0,0) kernel /boot/vmlinuz-2.6.15-1.2041_FC5 ro root=LABEL=/ initrd /boot/initrd-2.6.15-1.2041_FC5.img title Fedora Core (2.6.15-1.1833_FC4) root (hd0,0) kernel /boot/vmlinuz-2.6.15-1.1833_FC4 ro root=LABEL=/ initrd /boot/initrd-2.6.15-1.1833_FC4.img
Just incase you need any info about the SATA RAID array. # mdadm.conf written out by anaconda DEVICE partitions MAILADDR root ARRAY /dev/md0 level=raid5 num-devices=4 uuid=3a1bbe67:fd907e6c:d2b2f8bf:58d12d79
What version of mkinitrd was installed when you installed this kernel?
I can't be 100% sure - as the upgrade to rawhide was done on a fully up to date FC4 install. Depending on the install order of packages during the upgrade, it would either be the latest available in FC4's updates-released repo, or the latest available via rawhide. What I mean by this, is that if mkinitrd was installed by yum before the kernel. The currently installed version is: mkinitrd-5.0.31-1
The same problem except for certain differences. 1) Fresh FC4 install from CD 2) "yum update" yesterday (this step is optional) 3) change yum repos to devel 4) "yum update" gives conflict problem regarding "kernel" (that is by itself not good) 5) Two kernels at this point, 2.6.11 and 2.6.15, "rpm -e kernel-2.6.15" 6) "yum update --except '10 packages including kernel, initscripts, kudzu'" 7) manually "rpm -U kernel-2.6.15-1.1833_FC4.i686.rpm" 8) "yum update" At this point the system is pretty much FC5 with 2 kernels kernel-2.6.15-1.1833_FC4 and kernel-2.6.15-1.2054_FC5 (this one was not added to grub.conf (!), so add it manually). Reboot to any of these - kernel panics: switchroot: new root mount point expected Kernel Panic - not syncing: Attempted to kill init! The root partition is /dev/hda1 (LABEL=/). No /boot partition, no RAID. mkinitrd is still 4.2.15, accourding to VERSION string in /sbin/mkinitrd. This is probably the problem.
Ok, after mounting this disk (i.e. "/" and "/usr"), I investigated the problem and finally solved my kernel panic. /sbin/grubby was 644 instead of 755 (I want to remind this is stock FC4 with yum updates). This probably explains why FC5 kernel was not added to grub.conf in my case. After "chroot", I installed missing mkinitrd, "rpm -U mkinitrd-5.0.32-1.i386.rpm". After "mount /sys" and "mkinitrd -f -v /boot/initrd-2.6.15-1.2054_FC5.img 2.6.15-1.2054_FC5", I rebooted the system (FC5 at this point) and it came up.
bizarre. I've no idea why grubby ended up mode 644 Peter ?
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