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realloc can return NULL in one of two cases - (1) the realloc failed,
(2) realloc succeeded but the new size requested was zero, in which
case this is identical to a free() call.
The error paths dealing with these two cases should be different,
but mostly weren't. Secondly the standard idiom for dealing with
realloc when you know the new size is non-zero is the following :
tmp = realloc(p, size);
if (!tmp) {
SAFE_FREE(p);
return error;
} else {
p = tmp;
}
However, there were *many* *many* places in Samba where we were
using the old (broken) idiom of :
p = realloc(p, size)
if (!p) {
return error;
}
which will leak the memory pointed to by p on realloc fail.
This commit (hopefully) fixes all these cases by moving to
a standard idiom of :
p = SMB_REALLOC(p, size)
if (!p) {
return error;
}
Where if the realloc returns null due to the realloc failing
or size == 0 we *guarentee* that the storage pointed to by p
has been freed. This allows me to remove a lot of code that
was dealing with the standard (more verbose) method that required
a tmp pointer. This is almost always what you want. When a
realloc fails you never usually want the old memory, you
want to free it and get into your error processing asap.
For the 11 remaining cases where we really do need to keep the
old pointer I have invented the new macro SMB_REALLOC_KEEP_OLD_ON_ERROR,
which can be used as follows :
tmp = SMB_REALLOC_KEEP_OLD_ON_ERROR(p, size);
if (!tmp) {
SAFE_FREE(p);
return error;
} else {
p = tmp;
}
SMB_REALLOC_KEEP_OLD_ON_ERROR guarentees never to free the
pointer p, even on size == 0 or realloc fail. All this is
done by a hidden extra argument to Realloc(), BOOL free_old_on_error
which is set appropriately by the SMB_REALLOC and SMB_REALLOC_KEEP_OLD_ON_ERROR
macros (and their array counterparts).
It remains to be seen what this will do to our Coverity bug count :-).
Jeremy.
(This used to be commit 1d710d06a214f3f1740e80e0bffd6aab44aac2b0)
setup comes in with the vc (virtual connection) field set to zero. This is
done by Windows, probably you can tweak that by some registry key.
This boolean option controls whether an incoming session setup
should kill other connections coming from the same IP. This matches
the default Windows 2003 behaviour.
Setting this parameter to yes becomes necessary when you have a flaky
network and windows decides to reconnect while the old connection
still has files with share modes open. These files become inaccessible
over the new connection.
The client sends a zero VC on the new connection, and Windows 2003
kills all other connections coming from the same IP. This way the
locked files are accessible again.
Please be aware that enabling this option will kill connections behind
a masquerading router.
Volker
(This used to be commit 5629ca16235f0aa21fea3afd9e414309e4e1374e)
functions so we can funnel through some well known functions. Should help greatly with
malloc checking.
HEAD patch to follow.
Jeremy.
(This used to be commit 620f2e608f70ba92f032720c031283d295c5c06a)
I've now tested this in daemon mode and also on xinetd and I'm pretty
sure it's working.
Jeremy.
(This used to be commit 14dee038019b11300466b148c53515fc76e5e870)
* remove corrupt tdb and shutdown (only for printing tdbs, connections,
sessionid & locking)
* decrement smbd counter in connections.tdb in smb_panic()
* various Makefile hack to get things to link
'max smbd processes' looks like it might be broken. The counter KEY is not
being set. Will look into that tomorrow.
(This used to be commit 6e22c5da929b6d9a4e32dc704c83112b2ad8fcfd)
hostname.
This makes 'last -i' show the IP.
Thanks to Philip Anderson <pza@australia.op.org> for the idea.
Andrew Bartlett
(This used to be commit 107731c080da1e3e4e13e966f8b79bfd2692a952)
waiting for DNS timeouts to occur. The correct place to do this is in the
code that displays the session information.
(This used to be commit 2e89165f22d9e9c1fa749ae54957d0ec84a1497d)
This changes the way we process guest logons - we now treat them as normal
logons, but set the 'guest' flag. In particular this is needed becouse Win2k
will do an NTLMSSP login with username "", therefore missing our previous guest
connection code - this is getting a pain to do as a special case all over the
shop.
Tridge: We don't seem to be setting a guest bit for NTLMSSP, in either the
anonymous or authenticated case, can you take a look at this?
Also some cleanups in the check_password() code that should make some of the
debugs clearer.
Various other minor cleanups:
- change the session code to just take a vuser, rather than having to do a
vuid lookup on vuser.vuid
- Change some of the global_client_caps linking
- Better debug in authorise_login(): show the vuid.
Andrew Bartlett
(This used to be commit 62f4e4bd0aef9ade653b3f8d575d2864c166ab4d)
drop paramaters:
status
utmp hostname
change session code to always record each vuid current on the server. The sessionid struct is no longer packed, as I couldn't get that to work ;-)
change smbstatus to show this info and less of the connections.tdb info (its not actualy that accurate).
I'll get swat doing some of this shortly.
(This used to be commit b068ad300527c44673bbee0aede7849199c89de7)
remove global static PAM variables, and to tidy up the PAM internals code.
Now looks like the rest of Samba.
Still needs testing.
Jeremy.
(This used to be commit 1648ac64a75de74d1a1575eb49cccc4f75488bfa)
horrid utmp hostname parameter - now uses the client name instead.
Also tidies up some of the unencrypted password checking when PAM
is compiled in.
FIXME ! An pam_accountcheck() is being called even when smb encrypted
passwords are negotiated. Is this the correct thing to do when winbindd
is running ! This needs *SEVERE* testing....
Jeremy.
(This used to be commit 071c799f479dd25efdb9c41745fc8f2beea7b568)
