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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)
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session
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)
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allocation
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)
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tdb_open_log() instead of tdb_open_ex()
(This used to be commit e65564ab4aa1240e84b8d272510aa770cad0ed0e)
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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)
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* 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)
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* one more try at fixing builds when --with-ldap=no
(This used to be commit b516ab7bdef6b6b2b7f0df8966dbd4c329f46a92)
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(This used to be commit 865c11275685c85124b506c9bbd2a8bde2e760b9)
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(This used to be commit 04d27381325561038bee1c27f10c748b9aaf447d)
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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)
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(This used to be commit 42615b945e2e48e53a21ea47f2e45407913a6a1e)
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(This used to be commit 03ac082dcb375b6f3ca3d810a6a6367542bc23ce)
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reverse DNS fails, then store the IP.
(This used to be commit d97771aa80b48fbdb9cae3e9712e35fcc895b148)
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Andrew Bartlett
(This used to be commit dfecd6a4534743a3e140eafc9836911286793951)
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Changed "SMB/Netbios" to "SMB/CIFS" in file header.
(This used to be commit 6a58c9bd06d0d7502a24bf5ce5a2faf0a146edfa)
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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)
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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)
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(This used to be commit d42c28fbadf577a23fb8c1da9e1c64a2f34fe133)
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(This used to be commit a95943fde0ad89ae3f2deca2f7ba9cb5ab612b74)
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(This used to be commit c26e0d3f27a05ecc8bd2390f9aab7f9451524e47)
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(This used to be commit bfce4ba7b6db261d981a60a7e262f2f690355f5c)
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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)
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Jeremy.
(This used to be commit 840802f10677cb0009cb4df4c37c7d01aa5edacd)
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(This used to be commit 8ec9c87b5d1a7dae17d5b1a30f58effaf5e69e4b)
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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)
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Jeremy.
(This used to be commit 43b69e5d6e78a30563d7c1d03c7e920d529487b5)
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Fixed off by one bug using StrnCpy instead of strdup().
Jeremy.
(This used to be commit d4b1c0be2e700c86a4338bb497777f97e3c960a7)
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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)
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Jeremy.
(This used to be commit 1e098744677e022547707ebff500fb4515402871)
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(This used to be commit c0d4a1f5dd34e49843c879dd88fc78c7dffd9269)
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