Your message dated Sat, 25 Aug 2007 21:09:16 -0600
with message-id <[EMAIL PROTECTED]>
and subject line Bug#305765: umount - segfault on not permitted actions
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(administrator, Debian Bugs database)
--- Begin Message ---
Package: mount
Version: 2.12p-4
Severity: normal
Hello,
when I try to umount a partition mounted by the same user before, the
operation fails and I get a segmentation fault. On partitions mounted by
root, there is a proper message:
$ umount /mnt/c
umount: only root can unmount /dev/hda1 from /mnt/c
$ umount /mnt/d
Segmentation fault
$ mount
...
/dev/hda1 /mnt/c vfat
rw,nodiratime,nosuid,nodev,noexec,fmask=0000,dmask=0000,codepage=cp437,iocharset=utf8,utf8
0 0
/dev/sda1 /mnt/d vfat
rw,nodiratime,nosuid,nodev,noexec,uid=1000,gid=1000,fmask=0000,dmask=0000,codepage=cp437,iocharset=utf8,utf8
0 0
$ cat /etc/fstab
...
/dev/hda1 /mnt/c vfat auto,user,umask=000,utf8 0 0
UUID="41EB-F193" /mnt/d vfat auto,user,umask=000,utf8
0 0
This looks odd, I cannot see the reasons for a) not allowing the umount and b)
the segmentation fault.
strace says:
...
readlink("/mnt", 0xbfffd820, 4096) = -1 EINVAL (Invalid argument)
readlink("/mnt/d", 0xbfffd820, 4096) = -1 EINVAL (Invalid argument)
umask(077) = 022
open("/etc/mtab", O_RDONLY|O_LARGEFILE) = 3
umask(022) = 077
fstat64(3, {st_mode=S_IFREG|0644, st_size=998, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0xb7fe8000
read(3, "/dev/ide/host0/bus0/target0/lun0"..., 4096) = 998
read(3, "", 4096) = 0
close(3) = 0
munmap(0xb7fe8000, 4096) = 0
stat64("/sbin/umount.vfat", 0xbffff6f0) = -1 ENOENT (No such file or directory)
oldumount("/mnt/d") = -1 EPERM (Operation not permitted)
oldumount("/dev/scsi/host3/bus0/target1/lun0/part1") = -1 ENOENT (No such file
or directory)
lstat64("/etc/mtab", {st_mode=S_IFREG|0644, st_size=998, ...}) = 0
open("/etc/mtab", O_RDWR|O_CREAT|O_LARGEFILE, 0644) = -1 EACCES (Permission
denied)
write(2, "umount: /dev/scsi/host3/bus0/tar"..., 59umount:
/dev/scsi/host3/bus0/target1/lun0/part1: not found
) = 59
write(2, "umount: /mnt/d: must be superuse"..., 44umount: /mnt/d: must be
superuser to umount
) = 44
stat64("/sbin/umount.vfat", 0xbffff6f0) = -1 ENOENT (No such file or directory)
oldumount("/mnt/d") = -1 EPERM (Operation not permitted)
oldumount("/dev/scsi/host3/bus0/target1/lun0/part1") = -1 ENOENT (No such file
or directory)
write(2, "umount: /dev/scsi/host3/bus0/tar"..., 59umount:
/dev/scsi/host3/bus0/target1/lun0/part1: not found
) = 59
write(2, "umount: /mnt/d: must be superuse"..., 44umount: /mnt/d: must be
superuser to umount
) = 44
exit_group(1) = ?
Regards,
Eduard.
-- System Information:
Debian Release: 3.1
APT prefers unstable
APT policy: (990, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: i386 (i686)
Kernel: Linux 2.6.11.7
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Versions of packages mount depends on:
ii libblkid1 1.37-2 block device id library
ii libc6 2.3.2.ds1-21 GNU C Library: Shared libraries an
ii libuuid1 1.37-2 universally unique id library
-- no debconf information
--- End Message ---
--- Begin Message ---
Version: 2.13~rc1-0
--
Fixed in 2.13.
lamont
--- End Message ---
