[SCM] Samba Shared Repository - branch v4-0-test updated

Karolin Seeger kseeger at samba.org
Tue May 7 02:33:05 MDT 2013


The branch, v4-0-test has been updated
       via  ed22de6 check_parent_exists() can change errno. Ensure we preserve it across calls.
       via  a752308 Fix bug #9822 - Samba crashing during Win8 sync.
       via  e83dc71 Remove dependency on detection of HAVE_DIRFD for use of fdopendir().
       via  93d866e Remove the "Ugly hack" that was the second use of dirfd().
       via  44d4728 In the struct smb_Dir destructor, use the fsp back pointer to release resources.
       via  ecdcb62 Maintain a back-pointer to the fsp in struct smb_Dir when opening with FDOPENDIR.
       via  2a09b5d winbind4: Fix bug 9832 -- talloc use after free
       via  973bbc4 auth/ntlmssp: Avoid use-after-free of user_info after logon failure at log level 5
      from  ae3aa28 BUG 9817: Fix 'map untrusted to domain' with NTLMv2.

http://gitweb.samba.org/?p=samba.git;a=shortlog;h=v4-0-test


- Log -----------------------------------------------------------------
commit ed22de6479971421b8e32188bfea4521a5f1c0cc
Author: Anand Avati <avati at redhat.com>
Date:   Mon Apr 29 15:21:00 2013 -0700

    check_parent_exists() can change errno. Ensure we preserve it across calls.
    
    Reviewed-by: Jeremy Allison <jra at samba.org>
    Reviewed-by: Volker Lendecke <vl at samba.org>
    
    Autobuild-User(master): Volker Lendecke <vl at samba.org>
    Autobuild-Date(master): Tue Apr 30 11:00:11 CEST 2013 on sn-devel-104
    (cherry picked from commit 7e807934e6550308efed814a20ce6d6dabbad557)
    
    Fix bug #9833 - Function called in unix_convert() path can overwrite errno.
    
    Autobuild-User(v4-0-test): Karolin Seeger <kseeger at samba.org>
    Autobuild-Date(v4-0-test): Tue May  7 10:32:43 CEST 2013 on sn-devel-104

commit a752308b89677d571300487858ba2509fe37ee6d
Author: Jeremy Allison <jra at samba.org>
Date:   Fri Apr 26 10:47:41 2013 -0700

    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 at samba.org>
    Reviewed-by: David Disseldorp <ddiss at samba.org>
    
    Autobuild-User(master): David Disseldorp <ddiss at samba.org>
    Autobuild-Date(master): Sat Apr 27 20:44:55 CEST 2013 on sn-devel-104
    (cherry picked from commit 251767cde9a146d8122d76e257ab232c05ad452a)

commit e83dc714d5f773d8c9c08aa9bedc3f31cea7a137
Author: Jeremy Allison <jra at samba.org>
Date:   Wed Apr 10 16:30:10 2013 -0700

    Remove dependency on detection of HAVE_DIRFD for use of fdopendir().
    
    Signed-off-by: Jeremy Allison <jra at samba.org>
    Reviewed-by: Andreas Schneider <asn at samba.org>
    
    Autobuild-User(master): Andreas Schneider <asn at cryptomilk.org>
    Autobuild-Date(master): Fri Apr 12 16:21:10 CEST 2013 on sn-devel-104
    (cherry picked from commit 7a4dd845958f1411daa8031ca242987001ab2f26)

commit 93d866e0dc5b968b442b24d7f00e304b4056a928
Author: Jeremy Allison <jra at samba.org>
Date:   Wed Apr 10 16:29:03 2013 -0700

    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 at samba.org>
    Reviewed-by: Andreas Schneider <asn at samba.org>
    (cherry picked from commit 0fe894fb89f4867e266bb04670a58101311e0234)

commit 44d47283133f1564b736540dc724473d2bd08416
Author: Jeremy Allison <jra at samba.org>
Date:   Wed Apr 10 16:24:15 2013 -0700

    In the struct smb_Dir destructor, use the fsp back pointer to release resources.
    
    Removes one use of dirfd().
    
    Signed-off-by: Jeremy Allison <jra at samba.org>
    Reviewed-by: Andreas Schneider <asn at samba.org>
    (cherry picked from commit ea14c9443178da9ae6ccbe71e573156396f6f699)

commit ecdcb622bfaf636f87d13064dcf6c6fade880260
Author: Jeremy Allison <jra at samba.org>
Date:   Wed Apr 10 16:21:39 2013 -0700

    Maintain a back-pointer to the fsp in struct smb_Dir when opening with FDOPENDIR.
    
    Signed-off-by: Jeremy Allison <jra at samba.org>
    Reviewed-by: Andreas Schneider <asn at samba.org>
    (cherry picked from commit e89ec641fc98ffd7f7193deb3728b0a284a093eb)

commit 2a09b5d2cd04840a733cf06c95bea6f0f7377a45
Author: Volker Lendecke <vl at samba.org>
Date:   Mon Apr 29 18:40:08 2013 +0200

    winbind4: Fix bug 9832 -- talloc use after free
    
    Signed-off-by: Volker Lendecke <vl at samba.org>
    Reviewed-by: Stefan Metzmacher <metze at samba.org>
    (cherry picked from commit c672ef11b1ed663b6366f321d3628acf05b3d0fe)

commit 973bbc449837f4c2ce07bc0403267fed83f340a9
Author: Andrew Bartlett <abartlet at samba.org>
Date:   Fri Mar 15 13:00:55 2013 +1100

    auth/ntlmssp: Avoid use-after-free of user_info after logon failure at log level 5
    
    Reviewed-by: Jeremy Allison <jra at samba.org>
    (cherry picked from commit 1dcd75df4941d7032a66d3fbb86ac76964444a3f)
    
    Fix bug #9834 - segfault when loging in with wrong password from w2k8r2.

-----------------------------------------------------------------------

Summary of changes:
 auth/ntlmssp/ntlmssp_server.c |    2 +-
 source3/lib/system.c          |    4 +--
 source3/smbd/dir.c            |   46 ++++++++++++++++++++--------------------
 source3/smbd/filename.c       |    9 +++++++-
 source4/winbind/wb_server.c   |    2 +-
 5 files changed, 34 insertions(+), 29 deletions(-)


Changeset truncated at 500 lines:

diff --git a/auth/ntlmssp/ntlmssp_server.c b/auth/ntlmssp/ntlmssp_server.c
index d9bea1c..442bd5d 100644
--- a/auth/ntlmssp/ntlmssp_server.c
+++ b/auth/ntlmssp/ntlmssp_server.c
@@ -449,11 +449,11 @@ static NTSTATUS ntlmssp_server_check_password(struct gensec_security *gensec_sec
 							      &gensec_ntlmssp->server_returned_info,
 							      user_session_key, lm_session_key);
 	}
-	talloc_free(user_info);
 
 	if (!NT_STATUS_IS_OK(nt_status)) {
 		DEBUG(5, (__location__ ": Checking NTLMSSP password for %s\\%s failed: %s\n", user_info->client.domain_name, user_info->client.account_name, nt_errstr(nt_status)));
 	}
+	TALLOC_FREE(user_info);
 
 	NT_STATUS_NOT_OK_RETURN(nt_status);
 
diff --git a/source3/lib/system.c b/source3/lib/system.c
index d69f1c6..8dbf7dc 100644
--- a/source3/lib/system.c
+++ b/source3/lib/system.c
@@ -634,13 +634,11 @@ void kernel_flock(int fd, uint32 share_mode, uint32 access_mask)
 
 /*******************************************************************
  An fdopendir wrapper.
- Ugly hack - we need dirfd for this to work correctly in the
- calling code.. JRA.
 ********************************************************************/
 
 DIR *sys_fdopendir(int fd)
 {
-#if defined(HAVE_FDOPENDIR) && defined(HAVE_DIRFD)
+#if defined(HAVE_FDOPENDIR)
 	return fdopendir(fd);
 #else
 	errno = ENOSYS;
diff --git a/source3/smbd/dir.c b/source3/smbd/dir.c
index a06fc5f..52bd6a1 100644
--- a/source3/smbd/dir.c
+++ b/source3/smbd/dir.c
@@ -50,6 +50,8 @@ struct smb_Dir {
 	struct name_cache_entry *name_cache;
 	unsigned int name_cache_index;
 	unsigned int file_number;
+	files_struct *fsp; /* Back pointer to containing fsp, only
+			      set from OpenDir_fsp(). */
 };
 
 struct dptr_struct {
@@ -675,18 +677,11 @@ done:
 void dptr_CloseDir(files_struct *fsp)
 {
 	if (fsp->dptr) {
-/*
- * Ugly hack. We have defined fdopendir to return ENOSYS if dirfd also isn't
- * present. I hate Solaris. JRA.
- */
-#ifdef HAVE_DIRFD
-		if (fsp->fh->fd != -1 &&
-				fsp->dptr->dir_hnd &&
-				dirfd(fsp->dptr->dir_hnd->dir)) {
-			/* The call below closes the underlying fd. */
-			fsp->fh->fd = -1;
-		}
-#endif
+		/*
+		 * The destructor for the struct smb_Dir
+		 * (fsp->dptr->dir_hnd) now handles
+		 * all resource deallocation.
+		 */
 		dptr_close_internal(fsp->dptr);
 		fsp->dptr = NULL;
 	}
@@ -1442,18 +1437,21 @@ bool is_visible_file(connection_struct *conn, const char *dir_path,
 
 static int smb_Dir_destructor(struct smb_Dir *dirp)
 {
-	if (dirp->dir) {
-#ifdef HAVE_DIRFD
-		if (dirp->conn->sconn) {
-			files_struct *fsp = file_find_fd(dirp->conn->sconn,
-						dirfd(dirp->dir));
-			if (fsp) {
-				/* The call below closes the underlying fd. */
-				fsp->fh->fd = -1;
+	if (dirp->dir != NULL) {
+		SMB_VFS_CLOSEDIR(dirp->conn,dirp->dir);
+		if (dirp->fsp != NULL) {
+			/*
+			 * The SMB_VFS_CLOSEDIR above
+			 * closes the underlying fd inside
+			 * dirp->fsp.
+			 */
+			dirp->fsp->fh->fd = -1;
+			if (dirp->fsp->dptr != NULL) {
+				SMB_ASSERT(dirp->fsp->dptr->dir_hnd == dirp);
+				dirp->fsp->dptr->dir_hnd = NULL;
 			}
+			dirp->fsp = NULL;
 		}
-#endif
-		SMB_VFS_CLOSEDIR(dirp->conn,dirp->dir);
 	}
 	if (dirp->conn->sconn && !dirp->conn->sconn->using_smb2) {
 		dirp->conn->sconn->searches.dirhandles_open--;
@@ -1537,7 +1535,9 @@ static struct smb_Dir *OpenDir_fsp(TALLOC_CTX *mem_ctx, connection_struct *conn,
 
 	if (fsp->is_directory && fsp->fh->fd != -1) {
 		dirp->dir = SMB_VFS_FDOPENDIR(fsp, mask, attr);
-		if (dirp->dir == NULL) {
+		if (dirp->dir != NULL) {
+			dirp->fsp = fsp;
+		} else {
 			DEBUG(10,("OpenDir_fsp: SMB_VFS_FDOPENDIR on %s returned "
 				"NULL (%s)\n",
 				dirp->dir_path,
diff --git a/source3/smbd/filename.c b/source3/smbd/filename.c
index 0be566f..9b05de3 100644
--- a/source3/smbd/filename.c
+++ b/source3/smbd/filename.c
@@ -450,13 +450,17 @@ NTSTATUS unix_convert(TALLOC_CTX *ctx,
 
 		if (errno == ENOENT) {
 			/* Optimization when creating a new file - only
-			   the last component doesn't exist. */
+			   the last component doesn't exist.
+			   NOTE : check_parent_exists() doesn't preserve errno.
+			*/
+			int saved_errno = errno;
 			status = check_parent_exists(ctx,
 						conn,
 						posix_pathnames,
 						smb_fname,
 						&dirpath,
 						&start);
+			errno = saved_errno;
 			if (!NT_STATUS_IS_OK(status)) {
 				goto fail;
 			}
@@ -529,13 +533,16 @@ NTSTATUS unix_convert(TALLOC_CTX *ctx,
 		 * Optimization for common case where the wildcard
 		 * is in the last component and the client already
 		 * sent the correct case.
+		 * NOTE : check_parent_exists() doesn't preserve errno.
 		 */
+		int saved_errno = errno;
 		status = check_parent_exists(ctx,
 					conn,
 					posix_pathnames,
 					smb_fname,
 					&dirpath,
 					&start);
+		errno = saved_errno;
 		if (!NT_STATUS_IS_OK(status)) {
 			goto fail;
 		}
diff --git a/source4/winbind/wb_server.c b/source4/winbind/wb_server.c
index a904470..bd2d361 100644
--- a/source4/winbind/wb_server.c
+++ b/source4/winbind/wb_server.c
@@ -75,7 +75,7 @@ static void wbsrv_call_loop(struct tevent_req *subreq)
 	if (!NT_STATUS_IS_OK(status)) {
 		const char *reason;
 
-		reason = talloc_asprintf(call, "wbsrv_call_loop: "
+		reason = talloc_asprintf(wbsrv_conn, "wbsrv_call_loop: "
 					 "tstream_read_pdu_blob_recv() - %s",
 					 nt_errstr(status));
 		if (!reason) {


-- 
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