| 1 |
On Thu, 16 Mar 2006 21:08:29 +0000 |
| 2 |
Mike Williams <mike@××××××××.uk> wrote: |
| 3 |
|
| 4 |
> It's the user option. |
| 5 |
> user lets any normal user mount it, but no-one else unmount it. |
| 6 |
> users does the same, but lets a normal user other than the one which |
| 7 |
> mounted it, to unmount it. |
| 8 |
> |
| 9 |
> man mount |
| 10 |
> for more info. |
| 11 |
|
| 12 |
The problem is that I cannot even *mount* it as a regular user. |
| 13 |
|
| 14 |
jim@keelie $ mount /mnt/kaleb/ |
| 15 |
mount error: permission denied or not superuser and mount.cifs not |
| 16 |
installed SUID |
| 17 |
|
| 18 |
mount.cifs is SUID: |
| 19 |
|
| 20 |
jim@keelie $ ls -l /usr/bin/mount.cifs |
| 21 |
-rws--x--x 1 root root 21232 Mar 10 12:14 /usr/bin/mount.cifs |
| 22 |
|
| 23 |
|
| 24 |
Running strace on the mount command like so: |
| 25 |
strace mount /mnt/kaleb/ &> trace.txt |
| 26 |
|
| 27 |
Gives me this at the end of the output: |
| 28 |
|
| 29 |
readlink("/mnt", 0xbf95d3e0, 4096) = -1 EINVAL (Invalid argument) |
| 30 |
readlink("/mnt/kaleb", 0xbf95d3e0, 4096) = -1 EINVAL (Invalid argument) |
| 31 |
umask(077) = 02 |
| 32 |
open("/etc/fstab", O_RDONLY|O_LARGEFILE) = 3 |
| 33 |
umask(02) = 077 |
| 34 |
fstat64(3, {st_mode=S_IFREG|0644, st_size=454, ...}) = 0 |
| 35 |
mmap2(NULL, 131072, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, |
| 36 |
-1, 0) = 0xb7dee000 read(3, "/dev/hda1\t/\t\t\treiserfs\tnotail,no"..., |
| 37 |
131072) = 454 read(3, "", 131072) = 0 |
| 38 |
close(3) = 0 |
| 39 |
munmap(0xb7dee000, 131072) = 0 |
| 40 |
stat64("/sbin/mount.cifs", {st_mode=S_IFREG|S_ISUID|0755, |
| 41 |
st_size=21232, ...}) = 0 clone(mount error: permission denied or not |
| 42 |
superuser and mount.cifs not installed SUID child_stack=0, |
| 43 |
flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, |
| 44 |
child_tidptr=0xb7e0e708) = 23707 --- SIGCHLD (Child exited) @ 0 (0) --- |
| 45 |
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 255}], 0, NULL) = 23707 |
| 46 |
exit_group(255) = ? |
| 47 |
|
| 48 |
|
| 49 |
The interesting part is where stat64 is called on /sbin/mount.cifs. |
| 50 |
/sbin/mount.cifs is a symlink to ../usr/bin/mount.cifs. Maybe mount |
| 51 |
thinks that /sbin/mount.cifs is not SUID even though where it points to |
| 52 |
is SUID? |
| 53 |
|
| 54 |
Jim |
| 55 |
-- |
| 56 |
gentoo-user@g.o mailing list |
Archives