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Commit Graph

281 Commits

Author SHA1 Message Date
Jeremy Allison
49ed0b01d1 CVE-2017-2619: s3: smbd: Correctly fallback to open_dir_safely if FDOPENDIR not supported on system.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12496

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Uri Simchoni <uri@samba.org>
2017-03-23 19:10:19 +01:00
Jeremy Allison
f6dfdf7d31 CVE-2017-2619: s3: smbd: Move the reference counting and destructor setup to just before retuning success.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12496

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Uri Simchoni <uri@samba.org>
2017-03-23 19:10:19 +01:00
Jeremy Allison
e68e73b8d3 CVE-2017-2619: s3: smbd: OpenDir_fsp() - Fix memory leak on error.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12496

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Uri Simchoni <uri@samba.org>
2017-03-23 19:10:19 +01:00
Jeremy Allison
86f15237a1 CVE-2017-2619: s3: smbd: OpenDir_fsp() use early returns.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12496

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Uri Simchoni <uri@samba.org>
2017-03-23 19:10:19 +01:00
Jeremy Allison
05a9898dda CVE-2017-2619: s3: smbd: Create and use open_dir_safely(). Use from OpenDir().
Hardens OpenDir against TOC/TOU races.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=12496

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Uri Simchoni <uri@samba.org>
2017-03-23 19:10:19 +01:00
Jeremy Allison
682d597ee3 CVE-2017-2619: s3: smbd: Opendir_internal() early return if SMB_VFS_OPENDIR failed.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12496

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Uri Simchoni <uri@samba.org>
2017-03-23 19:10:19 +01:00
Jeremy Allison
3461518027 CVE-2017-2619: s3: smbd: Create wrapper function for OpenDir in preparation for making robust.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12496

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Uri Simchoni <uri@samba.org>
2017-03-23 19:10:19 +01:00
Jeremy Allison
dc5dad4813 s3: Filenames: Add uint32_t flags parameter to synthetic_smb_fname().
Get it from parent/deriving smb_filename if present.
Use 0 (as usually this a Windows-style lookup) if
not.

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Uri Simchoni <uri@samba.org>
2016-03-24 22:57:16 +01:00
Jeremy Allison
247481c12c s3: smbd: Change dptr_create() to take a const struct smb_filename * instead of const char *.
Also internally change path storage inside struct dptr_struct
to a struct smb_filename *.

This allows me to remove several of the synthetic_smb_fname()
calls I had to add in the previous patches, as we're now
dealing with struct smb_filename * throughout the dptr and
OpenDir code.

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>

Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Tue Mar  1 18:34:24 CET 2016 on sn-devel-144
2016-03-01 18:34:24 +01:00
Jeremy Allison
3203eb66d9 s3: smbd: Change OpenDir() to take a struct smb_filename *, not a char *.
Enhances plumbing to remove lp_posix_pathnames() later.

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
2016-03-01 15:25:22 +01:00
Jeremy Allison
852cce9930 s3: smbd: Change the internals of the private struct smb_Dir.
Store a struct smb_filename *, not a char *. This will
allow us to change the interface to OpenDir() in the next
commit to pass in a struct smb_filename *, not a char *.

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
2016-03-01 15:25:22 +01:00
Jeremy Allison
c74ae37fe6 VFS: Modify opendir to take a const struct smb_filename * instead of const char *
Preparing to reduce use of lp_posix_pathnames().

Uses the same techniques as commit 616d068f0c
(synthetic_smb_fname()) to cope with modules that
modify the incoming pathname.

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
2016-03-01 15:25:22 +01:00
Jeremy Allison
616d068f0c s3: VFS: Modify SMB_VFS_GET_NT_ACL to take a const struct smb_filename * instead of const char *
Bumps VFS version to 35.

Preparing to reduce use of lp_posix_pathnames().

Most of this is boilerplate, the only subtleties are in
the modules:

vfs_catia.c
vfs_media_harmony.c
vfs_shadow_copy2.c
vfs_unityed_media.c

Where the path is modified then passed to SMB_VFS_NEXT_GET_NT_ACL().
In these cases the change uses synthetic_smb_fname() to
create a new struct smb_filename from the modified path.

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <rb@sernet.de>
2016-02-16 19:59:24 +01:00
Jeremy Allison
cff17f0a8c s3: smbd: Remove one more use of lp_posix_pathnames().
Slowly removing them...

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>

Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Sun Jan 17 02:07:23 CET 2016 on sn-devel-144
2016-01-17 02:07:23 +01:00
Jeremy Allison
2efa2e08a4 s3: smbd: Replace lp_posix_pathnames() with req->posix_pathnames in dir.c. Only one remaining.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <Volker.Lendecke@SerNet.DE>

Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Wed Dec 23 21:27:46 CET 2015 on sn-devel-144
2015-12-23 21:27:46 +01:00
Jeremy Allison
16f202871c s3: smbd: Change semantics of strict rename to search the file open db.
Without strict rename just look in local process. POSIX renames are
already dealt with above.

Documentation change to follow.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=11065

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
2015-11-24 20:44:14 +01:00
Jeremy Allison
1582006112 s3: smbd: have_file_open_below() fails to enumerate open files below an open directory handle.
There are three issues:

1). The memcmp checking that the open file path has the open
directory path as its parent compares using the wrong length
(it uses the full open file path which will never compare as
the same).

2). The files_below_forall() function doesn't fill in the
callback function or callback data when calling share_mode_forall(),
leading to a crash (which we never saw, as the previous issue (1)
meant the callback function would never be invoked).

3). When invoking the callback function from files_below_forall_fn()
we were passing in the wrong private_data pointer (needs to be
the one from the state, not the private_data passed into
files_below_forall_fn()).

Found when running the torture test smb2.rename.rename_dir_openfile
when fixing bug #11065.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=11615

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>

Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Tue Nov 24 19:36:20 CET 2015 on sn-devel-104
2015-11-24 19:36:20 +01:00
Michael Adam
9883599fc9 smbd:dir: remove an extra empty line in files_below_forall()
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>

Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Tue Nov 24 15:59:47 CET 2015 on sn-devel-104
2015-11-24 15:59:47 +01:00
Jeremy Allison
cc05f73872 s3: smbd: Fix our access-based enumeration on "hide unreadable" to match Windows.
Torture test to follow.

https://bugzilla.samba.org/show_bug.cgi?id=10252

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
2015-10-14 15:58:19 +02:00
Volker Lendecke
345ef6b2ad smbd: Remove an unnecessary else branch
"goto out;" is sufficient before

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ira Cooper <ira@samba.org>

Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Thu Aug 20 15:52:20 CEST 2015 on sn-devel-104
2015-08-20 15:52:20 +02:00
Richard Sharpe
6abd986704 Convert all uses of uint8/16/32 to _t in source3/smbd.
Signed-off-by: Richard Sharpe <rsharpe@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2015-05-06 04:14:14 +02:00
Richard Sharpe
449181768f s3: smbd: Make sure we do not pass paths with ./ on the front to VFS routines.
Signed-off-by: Richard Sharpe <rsharpe@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu Apr 16 07:30:30 CEST 2015 on sn-devel-104
2015-04-16 07:30:30 +02:00
Volker Lendecke
f2f9acc113 smbd: Simplify ReadDirName
In the if-branches we return, so no "else" necessary

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2015-02-26 18:51:10 +01:00
Volker Lendecke
6ed53d4967 smbd: ZERO_STRUCT -> struct assignment
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2015-02-26 18:51:10 +01:00
Volker Lendecke
09c00923ba smbd: ZERO_STRUCT -> struct assignment
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2015-02-26 18:51:10 +01:00
Volker Lendecke
9e810b2fbe smbd: ZERO_STRUCTP -> talloc_zero()
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2015-02-26 18:51:10 +01:00
Volker Lendecke
035fd7200d s3:smbd: Don't rename a dir with files open underneath
This is an EXPENSIVE check. We'll have to guard this with an option

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
2014-10-31 03:47:40 +01:00
Jeremy Allison
6d03aed15e s3: smbd: Fix a couple of tricky slow-path cases - don't return a mangled name for a name that cannot be converted.
For a name that contains an illegal Windows character, the
directory listing code returns the mangled 8.3 name as the
primary name for the file.

If the original (non-mangled) filename cannot be converted
to UCS2 on the wire via iconv due to conversion error, we
should skip that name when returning a directory listing,
as we can't map back from a returned 8.3 name to a usable
non-mangled filename if the client sends it back to us.

As this is only done in a very slow path (name must be mangled)
or in the old DOS protocol listing code I don't feel too bad
about using a talloc/free pair here.

Bug 10775 - smbd crashes when accessing garbage filenames

https://bugzilla.samba.org/show_bug.cgi?id=10775

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>
2014-09-16 01:56:55 +02:00
Volker Lendecke
af23d5efc0 smbd: Move make_dir_struct() to reply.c
This routine has nothing to do with dptr handling, it is SMB1 marshalling
called only from reply_search().

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>
2014-09-09 13:03:58 +02:00
Stefan Metzmacher
45807028d4 lib/util: move memcache.[ch] to the toplevel 'samba-util' library
This is generic enough that it could be used in all code.

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>

Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Fri Jul 18 15:43:33 CEST 2014 on sn-devel-104
2014-07-18 15:43:33 +02:00
Michael Adam
02bcdd109f s3:smbd: initialize stat_ex buffer in smbd_dirptr_get_entry()
This prevents random garbage in the vfs_private member.
Usually it should not be a problem to leave initialization
of the vfs_private to the vfs module who wants to use it,
but further down in the directory listing code, in
vfswrap_readdir, there is in optimization introduced
with 2a65e8befe, to call
fstatat if possible to already fill stat info in the
readdir call.

The problem is that this calls fstatat directly,
not going through VFS, but still making the stat buffer
valid, leaving vfs_private with random garbage.
Hence a vfs module using vfs_private, like vfs_gpfs
does for offline info (and winAttrs in general)
does not have a chance to tell whether the vfs_private
is valid if the stat buffer is marked valid.
This is a reason for the "flapping offline flag" problem
of the vfs_gpfs module.

Initializing the vfs_private to 0 here will for the
vfs_gpfs module result in files being marked online
always in a directory listing. So this is not a real fix
but it does at least make the problem less random.

A real general fix might be to implement SMB_VFS_FSTATAT()
and use it here.

Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Christof Schmitt <cs@samba.org>

Autobuild-User(master): Christof Schmitt <cs@samba.org>
Autobuild-Date(master): Sun Jul 13 11:26:58 CEST 2014 on sn-devel-104
2014-07-13 11:26:57 +02:00
Michael Adam
f365f9f8af s3:smbd: make dptr_ReadDirName() static.
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2014-07-10 00:26:14 +02:00
Garming Sam
debda15785 param: rename lp function and variable from "hideunwriteable_files" to "hide_unwriteable_files"
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2014-02-07 16:19:11 -08:00
Garming Sam
324a976653 param: rename lp function and variable from "hideunreadable" to "hide_unreadable"
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2014-02-07 16:19:11 -08:00
Jeremy Allison
97cd9c6729 s3:dir - Introduce a 64-bit directory offset <-> 32 bit wire offset map using memcache.
Should fix the DOS clients against 64-bit smbd's bug.

https://bugzilla.samba.org/show_bug.cgi?id=2662

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
2014-01-15 09:45:10 +01:00
Jeremy Allison
42c80358c8 s3:dir - Map wire offsets to native directory cookies.
Take care of the special offsets.

https://bugzilla.samba.org/show_bug.cgi?id=2662

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
2014-01-15 09:45:10 +01:00
Jeremy Allison
81df4123ca s3:dir - Cope with fixed mapping of 'special' values.
https://bugzilla.samba.org/show_bug.cgi?id=2662

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
2014-01-15 09:45:09 +01:00
Jeremy Allison
51a115b620 s3: dir - Introduce 32-bit wire versions of the 'special' values.
https://bugzilla.samba.org/show_bug.cgi?id=2662

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
2014-01-15 09:45:09 +01:00
Jeremy Allison
5afc25eceb s3:dir - Introduce a function to map a directory cookie to a 32-bit wire cookie.
Make this an identity for now.

https://bugzilla.samba.org/show_bug.cgi?id=2662

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
2014-01-15 09:45:09 +01:00
Jeremy Allison
584de2078d s3:dir - In the old SMB1 search code, rename offset to wire_offset to distinguish between wire and native offsets.
Rename uint32 type to correct uint32_t.

https://bugzilla.samba.org/show_bug.cgi?id=2662

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
2014-01-15 09:45:09 +01:00
Jeremy Allison
fc611dd6e8 s3-lib: smbclient shows no error if deleting a directory with del failed
BUG: https://bugzilla.samba.org/show_bug.cgi?id=10260

Move dir_check_ftype() to util.c

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
2013-11-14 19:29:00 +01:00
Jeremy Allison
7d8e22c7c1 s3-smbd: smbclient shows no error if deleting a directory with del failed
BUG: https://bugzilla.samba.org/show_bug.cgi?id=10260

Remove unneeded conn argument to dir_check_ftype().
Move to correct uint32_t types.

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
2013-11-14 19:29:00 +01:00
Volker Lendecke
e2a08e54dd smbd: Remove an unused variable
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Wed Jun 12 01:00:44 CEST 2013 on sn-devel-104
2013-06-12 01:00:44 +02:00
Jeremy Allison
251767cde9 Fix bug #9822 - Samba crashing during Win8 sync.
When refactoring the dptr desctructor in the
fix for bug:

9778 (Samba directory code uses dirfd() without vectoring through a VFS call)

I removed the code to NULL out the struct smb_Dir *
pointer inside the fsp struct by mistake.

Re-add the NULLing out of that pointer when
closing a directory pointer associated with
an open file.

Reporter confirms it fixes the crash.

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>

Autobuild-User(master): David Disseldorp <ddiss@samba.org>
Autobuild-Date(master): Sat Apr 27 20:44:55 CEST 2013 on sn-devel-104
2013-04-27 20:44:55 +02:00
Volker Lendecke
940ad94906 smbd: Convert is_visible_file to synthetic_smb_fname
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2013-04-17 14:50:03 -07:00
Volker Lendecke
59cfbc7925 smbd: Convert dptr_create to synthetic_smb_fname
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2013-04-17 14:50:03 -07:00
Volker Lendecke
2d76ce3fc0 smbd: Convert open_dir_with_privilege to synthetic_smb_fname
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2013-04-17 14:50:01 -07:00
Volker Lendecke
10f45a16b2 smbd: Convert smbd_dirptr_get_entry to cp_smb_filename
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2013-04-17 14:49:56 -07:00
Jeremy Allison
f340795144 Cleanup. Remove unused function dptr_DirCacheAdd(). Make DirCacheAdd() static.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: David Disseldorp <ddiss@suse.de>

Autobuild-User(master): David Disseldorp <ddiss@samba.org>
Autobuild-Date(master): Tue Apr 16 12:05:13 CEST 2013 on sn-devel-104
2013-04-16 12:05:13 +02:00
Jeremy Allison
0fe894fb89 Remove the "Ugly hack" that was the second use of dirfd().
The destructor does all the resource deallocation needed.

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
2013-04-12 14:33:40 +02:00