diff options
| author | Jeremy Allison <jra@samba.org> | 2009-05-30 13:28:03 -0700 |
|---|---|---|
| committer | Karolin Seeger <kseeger@samba.org> | 2009-06-02 08:08:15 +0200 |
| commit | 838f852ce4d8a88cfafeddf841342692ef7e21a9 (patch) | |
| tree | 33f3266912c9c5f9a3b1e20474939eb8c5ded0b4 | |
| parent | 1ca97c39de40f607cdc572551353e2960e90de6e (diff) | |
| download | samba-838f852ce4d8a88cfafeddf841342692ef7e21a9.tar.gz | |
Fix bug #6421 - POSIX read-only open fails on read-only shares.
The change to smbd/trans2.c opens up
SETFILEINFO calls to POSIX_OPEN only. The change to first smbd/open.c closes 2
holes that would have been exposed by allowing POSIX_OPENS on readonly shares,
and their ability to set arbitrary flags permutations. The O_CREAT ->
O_CREAT|O_EXCL change removes an illegal combination (O_EXCL without O_CREAT)
that previously was being passed down to the open syscall.
Jeremy.
(cherry picked from commit d49ae9c87d182f32702a0b6a1cc2a2038f31d81d)
| -rw-r--r-- | source3/smbd/open.c | 6 | ||||
| -rw-r--r-- | source3/smbd/trans2.c | 14 |
2 files changed, 12 insertions, 8 deletions
diff --git a/source3/smbd/open.c b/source3/smbd/open.c index 3578f2ac60d..a721c586437 100644 --- a/source3/smbd/open.c +++ b/source3/smbd/open.c @@ -346,7 +346,7 @@ static NTSTATUS open_file(files_struct *fsp, if (!CAN_WRITE(conn)) { /* It's a read-only share - fail if we wanted to write. */ - if(accmode != O_RDONLY) { + if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) { DEBUG(3,("Permission denied opening %s\n", path)); return NT_STATUS_ACCESS_DENIED; } else if(flags & O_CREAT) { @@ -354,8 +354,8 @@ static NTSTATUS open_file(files_struct *fsp, O_CREAT doesn't create the file if we have write access into the directory. */ - flags &= ~O_CREAT; - local_flags &= ~O_CREAT; + flags &= ~(O_CREAT|O_EXCL); + local_flags &= ~(O_CREAT|O_EXCL); } } diff --git a/source3/smbd/trans2.c b/source3/smbd/trans2.c index 4eb44e3df45..931b7df4bca 100644 --- a/source3/smbd/trans2.c +++ b/source3/smbd/trans2.c @@ -6840,16 +6840,20 @@ static void call_trans2setfilepathinfo(connection_struct *conn, } } - if (!CAN_WRITE(conn)) { - reply_doserror(req, ERRSRV, ERRaccess); - return; - } - if (INFO_LEVEL_IS_UNIX(info_level) && !lp_unix_extensions()) { reply_nterror(req, NT_STATUS_INVALID_LEVEL); return; } + if (!CAN_WRITE(conn)) { + /* Allow POSIX opens. The open path will deny + * any non-readonly opens. */ + if (info_level != SMB_POSIX_PATH_OPEN) { + reply_doserror(req, ERRSRV, ERRaccess); + return; + } + } + DEBUG(3,("call_trans2setfilepathinfo(%d) %s (fnum %d) info_level=%d totdata=%d\n", tran_call,fname, fsp ? fsp->fnum : -1, info_level,total_data)); |