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First of all, do a char-by-char walk through both buffers until we get
to a non-ascii character, or a difference between the strings. This
prefix can be directly compared without needing to call into iconv.
This should be much faster for strings that are either all ascii, or
differ near the start.
(This used to be commit f7f692b2db)
clobbering the region, just in case clobbering causes us to crash
immediately. (That might happen if we just shot ourselves in the
stack and strcpy was not inlined.)
Also, in DEVELOPER mode and when Valgrind is available, mark the
clobbered region as uninitialized. This is an even stronger
protection than clobbering with 0xf1.
(This used to be commit 5653a42ae6)
This patch enables the compile-time checking of strings assable by means of
sizeof(). (Original code had the configure check reversed).
This is extended to all safe_strcpy() users, push_string and pull_string,
as well as the cli and srv derivitives. There is an attempt to cap strings
at the end of the cli buffer, and clobber_region() of the speified length
(when not -1 :-).
Becouse of the way they are declared, the 'overmalloc a string' users of
safe_strcpy() have been changed to use overmalloc_safe_strcpy() (which skips
some of the checks).
This whole ball of mud worked fine, until I pulled out my 'fix' for our
statcache. When jeremy fixes that, we should be able to get back to testing
this stuff.
This patch also includes a 'marker' of the last caller to clobber_region (ie,
the function that called pstrcpy() that called clobber_region) to assist in
debugging problems that may have smashed the stack. This is printed at
smb_panic() time. (Original idea and patch by metze).
It also removes some unsused functions, and #if 0's some others that are
unused but probably should be used in the near future.
For now, this patch gives us some confidence on one class of trivial parsing
error in our code.
Andrew Bartlett
(This used to be commit 31f4827acc)
The current locking scheme in winbind is a complete mess - indeed, the
next step should be to push the locking into cli_full_connection(), but
I'll leave it for now.
This patch works on the noted behaviour that 2 parts of the connection
process need protection - and independent protection. Tim Potter did
some work on this a little while back, verifying the second case.
The two cases are:
- between connect() and first session setup
- during the auth2 phase of the netlogon pipe setup.
I've removed the counter on the lock, as I fail to see what it gains us.
This patch also adds 'anonymous fallback' to our winbindd -> DC connection.
If the authenticated connection fails (wbinfo -A specifed) - say that
account isn't trusted by a trusted DC - then we try an anonymous.
Both tpot and mbp like the patch.
Andrew Bartlett
(This used to be commit 0620320002)
lengths are correct. Attempts to pstrcpy into an fstring or allocated
string should fail in developer builds.
This builds on abartlet's earlier overflow probe for safe_strcpy, but
by clobbering the whole string with a nonzero value is more likely to
find overflows on the stack.
This is only used in -DDEVELOPER mode.
Reviewed by abartlet, tpot.
(This used to be commit 8d915e266c)
reason, during a Win2003 installation, when you select 'domain join' it sends
one machine name in the name exchange, and litraly 'machinename' during the
NTLMSSP login.
Also fix up winbindd's logfile handling, so that it matches smbd and nmbd.
(This helps me, by seperating the logs by pid).
Andrew Bartlett
(This used to be commit afe5a3832f)
* distinguish WinXP from Win2k
* add a 1/3 of a second delay in OpenPrinter
in order to trigger a LAN/WAN optimization in
2k clients.
(This used to be commit 96570699d1)
safe_strcpy() isn't particularly safe (this has been noted before) as it does
not take the size of the buffer, but instead the size of the buffer *minus 1*
The locking.c fix was causing segfaults on machines running with
--enable-developer, and was tracked down thanks to the fact that vance's build
farm machine runs with such an option, and smbtorture's DIR1 test hits this
bug very well.
(The --enable-developer code writes to the last byte of the string, to check
for incorrect use of safe_strcpy()).
Andrew Bartlett
(This used to be commit e908fd164d)
(According to the manpages, you cannot put a stack variable into putenv()).
Yes, this leaks memory.
Andrew Bartlett
(This used to be commit 50bced1e26)
When we look see if a user is in a list, and we try to 'expand' an @group, we
should lookup the user's own list of groups, rather than looking for all the
members of a group.
I'm sure this will fix some nasty performance issues, particularly on large
domains etc. In particular, this avoids contacting winbind at all, if the
group is not a winbind group.
(This caused a deadlock on my winbind-on-PDC setup).
The groups list always includes the user's primary group, as per the
getgrouplist manpage, and my recent changes to our implementation.
Andrew Bartlett
(This used to be commit 9be21976f7)
