[Samba] Re: chown failure on a samba share
Shirish Pargaonkar
shirishpargaonkar at gmail.com
Wed Mar 11 10:28:00 GMT 2009
On Wed, Mar 11, 2009 at 5:18 AM, Shirish Pargaonkar
<shirishpargaonkar at gmail.com> wrote:
> On Wed, Mar 11, 2009 at 5:11 AM, Shirish Pargaonkar
> <shirishpargaonkar at gmail.com> wrote:
>> On Wed, Mar 11, 2009 at 2:43 AM, Volker Lendecke
>> <Volker.Lendecke at sernet.de> wrote:
>>> On Tue, Mar 10, 2009 at 09:41:58PM -0500, Shirish Pargaonkar wrote:
>>>> On Tue, Mar 10, 2009 at 9:32 PM, Shirish Pargaonkar
>>>> <shirishpargaonkar at gmail.com> wrote:
>>>> > Is this working as designed or a samba bug?
>>>> >
>>>> > I am trying to chown ownership of a file in a samba share and it
>>>> > results in an error.
>>>> >
>>>> > cifstest6:~ # smbclient //cifstest8/smb8 -U root
>>>> > Enter root's password:
>>>> > Domain=[CIFSTEST8] OS=[Unix] Server=[Samba 3.4.0-GIT-e6a5f11-devel]
>>>> > smb: \> chown 65534 65534 file2
>>>> > NT_STATUS_ACCESS_DENIED chown file \file2 uid=65534, gid=65534
>>>> >
>>>> > The share is thus exported
>>>> >
>>>> > [smb88]
>>>> > path = /tmp/cifstest88
>>>> > browseable = Yes
>>>> > read only = No
>>>> > guest ok = Yes
>>>> > writable = yes
>>>> > printable = yes
>>>> >
>>>> > ls -l /tmp/cifstest8/file2
>>>> > -rwxrwxrwx 1 root root 0 Mar 10 10:47 /tmp/cifstest8/file2
>>>> >
>>>> >
>>>> > [2009/03/10 11:40:24, 3] smbd/trans2.c:6831(call_trans2setfilepathinfo)
>>>> > call_trans2setfilepathinfo(6) file2 (fnum -1) info_level=512 totdata=100
>>>> > [2009/03/10 11:40:24, 10] smbd/trans2.c:6069(smb_set_file_unix_basic)
>>>> > smb_set_file_unix_basic: SMB_SET_FILE_UNIX_BASIC: name = file2 size
>>>> > = 0, uid = 65534, gid = 65533, raw perms = 037777777777
>>>> > [2009/03/10 11:40:24, 10] smbd/trans2.c:6129(smb_set_file_unix_basic)
>>>> > smb_set_file_unix_basic: SMB_SET_FILE_UNIX_BASIC changing owner
>>>> > 65534 for path file2
>>>> > [2009/03/10 11:40:24, 3] smbd/error.c:60(error_packet_set)
>>>> > error packet at smbd/trans2.c(7087) cmd=50 (SMBtrans2) NT_STATUS_ACCESS_DENIED
>>>
>>> Just tried with current master: Works fine for me. Can you
>>> post an strace of smbd trying to do this?
>>>
>>> Volker
>>>
>>
>> Volker,
>>
>> Thanks. Here is the info.
>>
>> This is how I started collecting strace info
>>
>> strace -f /etc/init.d/smb start
>>
>> #SMBD_BIN="/usr/sbin/smbd"
>> SMBD_BIN="/usr/local/samba/sbin/smbd"
>> SMB_CONF="/etc/samba/smb.conf"
>> PID_FILE="/var/run/samba/smbd.pid"
>>
>>
>> # /usr/local/samba/sbin/smbd -V
>> Version 3.4.0-GIT-e6a5f11-devel
>>
>>
>> ps -eaf | grep smb
>> root 8604 1 0 04:41 ? 00:00:00
>> /usr/local/samba/sbin/smbd -D -s /etc/samba/smb.conf
>> root 8605 8604 0 04:41 ? 00:00:00
>> /usr/local/samba/sbin/smbd -D -s /etc/samba/smb.conf
>> root 8609 8604 0 04:41 ? 00:00:00
>> /usr/local/samba/sbin/smbd -D -s /etc/samba/smb.conf
>> root 8658 8604 0 04:46 ? 00:00:00
>> /usr/local/samba/sbin/smbd -D -s /etc/samba/smb.conf
>>
>>
>> smbclient //cifstest8/smb8 -U root
>> Enter root's password:
>> Domain=[CIFSTEST8] OS=[Unix] Server=[Samba 3.4.0-GIT-e6a5f11-devel]
>> smb: \> chown 65534 65534 file2
>> NT_STATUS_ACCESS_DENIED chown file \file2 uid=65534, gid=65534
>>
>>
>> .....................
>> .....................
>> [pid 8730] write(21, " change_to_user uid=(0,65534) g"..., 45) = 45
>> [pid 8730] stat("/etc/localtime", {st_mode=S_IFREG|0644,
>> st_size=3543, ...}) = 0
>> [pid 8730] geteuid() = 65534
>> [pid 8730] write(21, "[2009/03/11 04:53:12, 4] smbd/v"..., 52) = 52
>> [pid 8730] geteuid() = 65534
>> [pid 8730] write(21, " vfs_ChDir to /tmp/cifstest8\n", 30) = 30
>> [pid 8730] chdir("/tmp/cifstest8") = 0
>> [pid 8730] stat("/etc/localtime", {st_mode=S_IFREG|0644,
>> st_size=3543, ...}) = 0
>> [pid 8730] geteuid() = 65534
>> [pid 8730] write(21, "[2009/03/11 04:53:12, 5] smbd/f"..., 60) = 60
>> [pid 8730] geteuid() = 65534
>> [pid 8730] write(21, " unix_convert called on file \"f"..., 38) = 38
>> [pid 8730] stat("/etc/localtime", {st_mode=S_IFREG|0644,
>> st_size=3543, ...}) = 0
>> [pid 8730] geteuid() = 65534
>> [pid 8730] write(21, "[2009/03/11 04:53:12, 10] smbd/s"..., 66) = 66
>> [pid 8730] geteuid() = 65534
>> [pid 8730] write(21, " stat_cache_lookup: lookup fail"..., 52) = 52
>> [pid 8730] stat("file2", {st_mode=S_IFREG|0777, st_size=0, ...}) = 0
>> [pid 8730] stat("/etc/localtime", {st_mode=S_IFREG|0644,
>> st_size=3543, ...}) = 0
>> [pid 8730] geteuid() = 65534
>> [pid 8730] write(21, "[2009/03/11 04:53:12, 5] smbd/s"..., 63) = 63
>> [pid 8730] geteuid() = 65534
>> [pid 8730] write(21, " stat_cache_add: Added entry (7"..., 67) = 67
>> [pid 8730] stat("/etc/localtime", {st_mode=S_IFREG|0644,
>> st_size=3543, ...}) = 0
>> [pid 8730] geteuid() = 65534
>> [pid 8730] write(21, "[2009/03/11 04:53:12, 5] smbd/f"..., 60) = 60
>> [pid 8730] geteuid() = 65534
>> [pid 8730] write(21, " conversion finished file2 -> f"..., 37) = 37
>> [pid 8730] lstat("file2", {st_mode=S_IFREG|0777, st_size=0, ...}) = 0
>> [pid 8730] stat("/etc/localtime", {st_mode=S_IFREG|0644,
>> st_size=3543, ...}) = 0
>> [pid 8730] geteuid() = 65534
>> [pid 8730] write(21, "[2009/03/11 04:53:12, 3] smbd/t"..., 73) = 73
>> [pid 8730] geteuid() = 65534
>> [pid 8730] write(21, " call_trans2setfilepathinfo(6) "..., 75) = 75
>> [pid 8730] stat("/etc/localtime", {st_mode=S_IFREG|0644,
>> st_size=3543, ...}) = 0
>> [pid 8730] geteuid() = 65534
>> [pid 8730] write(21, "[2009/03/11 04:53:12, 10] smbd/t"..., 70) = 70
>> [pid 8730] geteuid() = 65534
>> [pid 8730] write(21, " smb_set_file_unix_basic: SMB_S"..., 126) = 126
>> [pid 8730] stat("/etc/localtime", {st_mode=S_IFREG|0644,
>> st_size=3543, ...}) = 0
>> [pid 8730] geteuid() = 65534
>> [pid 8730] write(21, "[2009/03/11 04:53:12, 10] smbd/t"..., 70) = 70
>> [pid 8730] geteuid() = 65534
>> [pid 8730] write(21, " smb_set_file_unix_basic: SMB_S"..., 87) = 87
>> [pid 8730] chown("file2", 65534, 4294967295) = -1 EPERM (Operation
>> not permitted)
>> [pid 8730] stat("/etc/localtime", {st_mode=S_IFREG|0644,
>> st_size=3543, ...}) = 0
>> [pid 8730] geteuid() = 65534
>> [pid 8730] write(21, "[2009/03/11 04:53:12, 3] smbd/e"..., 60) = 60
>> [pid 8730] geteuid() = 65534
>> [pid 8730] write(21, " error packet at smbd/trans2.c("..., 81) = 81
>> [pid 8730] stat("/etc/localtime", {st_mode=S_IFREG|0644,
>> st_size=3543, ...}) = 0
>> [pid 8730] geteuid() = 65534
>> [pid 8730] write(21, "[2009/03/11 04:53:12, 5] lib/ut"..., 51) = 51
>> [pid 8730] stat("/etc/localtime", {st_mode=S_IFREG|0644,
>> st_size=3543, ...}) = 0
>> [pid 8730] geteuid() = 65534
>> [pid 8730] write(21, "[2009/03/11 04:53:12, 5] lib/ut"..., 51) = 51
>> [pid 8730] geteuid() = 65534
>>
>>
>>
>> I tried this as well
>>
>> smb: \> chown 65534 file2
>> chown uid gid file
>>
>> smb: \> chown 65534 65533 file2
>> NT_STATUS_ACCESS_DENIED chown file \file2 uid=65534, gid=65533
>>
>> With just uid supplied to chown command, I do not get any error but
>> nothing changes on the server.
>>
>> cifstest8:/tmp/cifstest8 # cat /etc/passwd | grep nobody
>> nobody:x:65534:65533:nobody:/var/lib/nobody:/bin/bash
>>
>> cifstest8:/tmp/cifstest8 # cat /etc/group | grep nobody
>> nobody:x:65533:
>> nogroup:x:65534:nobody
>>
>
> chown("file2", 65534, 4294967295) = -1 EPERM (Operation not permitted)
>
> That gid of 4294967295 does not look right
>
ret = SMB_VFS_CHOWN(conn, fname, set_owner, (gid_t)-1);
is failing.
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