Por favor, lenguaje en español > Date: Wed, 26 Jan 2011 16:55:45 +0000 > From: 579...@bugs.launchpad.net > To: jlguti...@hotmail.com > Subject: [Bug 579858] Re: umount segfault on shutdown when unmounting autofs > mountpoint > > ** Branch linked: lp:ubuntu/util-linux > > -- > You received this bug notification because you are subscribed to Ubuntu > ubuntu-10.04.2. > https://bugs.launchpad.net/bugs/579858 > > Title: > umount segfault on shutdown when unmounting autofs mountpoint > > Status in “util-linux” package in Ubuntu: > Fix Released > Status in “util-linux” source package in Lucid: > Fix Committed > Status in “util-linux” source package in Maverick: > Triaged > Status in “util-linux” source package in Natty: > Fix Released > > Bug description: > Binary package hint: autofs5 > > After I started using autofs5 in lucid I got filesystem checks on every > boot up on my seperated /boot and /home partitions. They were not cleanly > unmounted. > I tried to research why: > On shutdown /etc/init.d/umountfs calls umount to unmount filesystems it > reads from /proc/mounts. Several Vars are created by the script and unmounted > then. I modified the script to get the vars content. > > PROTECTED_MOUNTS rootfs / rootfs rw 0 0 none /sys sysfs > rw,nosuid,nodev,noexec,relatime 0 0 none /proc proc > rw,nosuid,nodev,noexec,relatime 0 0 none /dev devtmpfs > rw,relatime,size=1988516k,nr_inodes=497129,mode=755 0 0 none /dev/pts devpts > rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0 > /dev/mapper/lvm_vg-root / ext4 > rw,noatime,errors=remount-ro,barrier=1,data=ordered 0 0 > WEAK_MTPTS /sys/kernel/security /sys/kernel/debug /sys/fs/fuse/connections > REG_MTPTS /home/flo/.gvfs /mnt/autofs /boot /home > TMPFS_MTPTS /tmp > > The problematic line is REG_MTPTS. The call to umount finally looks like > this: > fstab-decode umount -f -v -r -d $REG_MTPTS > which expands to (in my case) > fstab-decode umount -f -v -r -d /home/flo/.gvfs /mnt/autofs /boot /home > > When hiding plymouth screen at shutdown, I got a glimpse on a Segfault > message, after the umounting outputs. > > The segfault occurs when trying to unmount /mnt/autofs, so /boot and > /home never get unmounted and are unclean on next boot. So thats the > reason for the symptom. > > I further tried to unmount /mnt/autofs with gdb to trace the problem. > The segfault happens in strlen and is 100% reproducable. See the > output file attached. > > When i stop the autofs daemon before trying to unmount /mnt/autofs, > everything is fine, since the daemon removes the mountpoint anyways > when exiting. > > So there may be two problems/solutions: > First: Why does umount segfault? > And: Is autofs not correctly stoped by upstart, and isn't that the real > problem/solution? If autofs daemon would be stopped before executing > umountfs, it wouldn't try to unmount the autofs mountpoint. > > Additional attachments: output of: cat /proc/mounts, auto.* files > > ProblemType: Bug > DistroRelease: Ubuntu 10.04 > Package: autofs5 (not installed) > ProcVersionSignature: Ubuntu 2.6.32-22.33-generic 2.6.32.11+drm33.2 > Uname: Linux 2.6.32-22-generic x86_64 > Architecture: amd64 > Date: Thu May 13 10:40:16 2010 > ProcEnviron: > PATH=(custom, user) > LANG=en_US.utf8 > SHELL=/bin/bash > SourcePackage: autofs5 > >
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/579858 Title: umount segfault on shutdown when unmounting autofs mountpoint -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
