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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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Sync with trunk as off r13315
(This used to be commit 17e63ac4ed8325c0d44fe62b2442449f3298559f)
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by saving the UNIX token used to set a delete on close flag,
and using it when doing the delete. libsmbsharemodes.so still
needs updating to cope with this change.
Samba4 torture tests to follow.
Jeremy.
(This used to be commit 23f16cbc2e8cde97c486831e26bcafd4ab4a9654)
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Jeremy.
(This used to be commit 2187502732e41690bf266f229312bb9c7177cf22)
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only tell at parse time from the wire if an incoming name
has wildcards or not. If it's a mangled name and we demangle
the demangled name may contain wildcard characters. Ensure
these are ignored.
Jeremy.
(This used to be commit 4cd8e2a96b98ff711905e8c6f416b22440c16062)
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* \PIPE\unixinfo
* winbindd's {group,alias}membership new functions
* winbindd's lookupsids() functionality
* swat (trunk changes to be reverted as per discussion with Deryck)
(This used to be commit 939c3cb5d78e3a2236209b296aa8aba8bdce32d3)
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tests on this as it's very late NY time (just wanted to get this work
into the tree). I'll test this over the weekend....
Jerry - in looking at the difference between the two trees there
seem to be some printing/ntprinting.c and registry changes we might
want to examine to try keep in sync.
Jeremy.
(This used to be commit c7fe18761e2c753afbffd3a78abff46472a9b8eb)
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pathnames.
ie. files containing : and \ can be accessed from Linux.
Jeremy.
(This used to be commit e9b8d23d6138d909a65ea70b2e801881e8333b38)
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checking for write access in a directory before delete. Also
controls checking for write access before labeling a file read-only
if DOS attributes are not being stored in EA's.
Docuementation to follow.
Jeremy.
(This used to be commit dd1a5e6e499dd721c5bb8d56a61810a7454a3449)
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POSIX pathnames. Not yet used.
Jeremy.
(This used to be commit 381da9b55d6a3fda2ba4a3f12bee50853b7fd3b3)
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security descriptors.
Jeremy.
(This used to be commit 4db288e3143c1ce691ae586a7353da00fec85879)
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bug,
fix trans2 and nttrans secondary packet processing. We were being too strict checking
the incoming packet (by 1 byte).
Jeremy.
(This used to be commit 3eea1ff4b7428325c7f304bcac61d6297209a4b8)
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initializable
statically.
Volker
(This used to be commit 3493d9f383567d286e69c0e60c0708ed400a04d9)
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(This used to be commit efea76ac71412f8622cd233912309e91b9ea52da)
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Jeremy.
(This used to be commit d5c56d25741e148ccae7c91f9b0157498d7ff148)
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Fix strange allocation semantics of openX.
Jeremy.
(This used to be commit da5a8b539d39d2765de22c3e55e9f284992ff966)
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nastyness.
Jeremy.
(This used to be commit d3379fe61bb934082b51a37adac232a96bafcf46)
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allocation
on create/truncate for nttrans.
Jeremy.
(This used to be commit fb05ac4c03eec21f3f18668610022ebfa6d6bf4a)
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nttrans_create.
Jeremy.
(This used to be commit 989fcb4c084c63f1e3b114af68ef5bc0a2fbc09e)
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Jeremy.
(This used to be commit 106f91ff65acd23a7dda4d0ec89ae41ecb28153e)
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set SD on an NTtransact create unless we created the file.
Jeremy.
(This used to be commit b42eaf424e34544fae3f0fc473694e61dda2a11c)
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pulling back all recent rpc changes from trunk into
3.0. I've tested a compile and so don't think I've missed
any files. But if so, just mail me and I'll clean backup
in a couple of hours.
Changes include \winreg, \eventlog, \svcctl, and
general parse_misc.c updates.
I am planning on bracketing the event code with an
#ifdef ENABLE_EVENTLOG until I finish merging Marcin's
changes (very soon).
(This used to be commit 4e0ac63c36527cd8c52ef720cae17e84f67e7221)
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working - need to valgrind it to be sure.
Jeremy.
(This used to be commit 8b2b652c0a47298cd188c67d256dfdffe01a951d)
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incorporates part of the fix created by ke_miyata@itg.hitachi.co.jp
for bug #2045 (MS-Office behavior of timestamp).
Jeremy.
(This used to be commit 4f3b12ac73487f4ccb37c17506af1abf5acc80cd)
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Jeremy.
(This used to be commit 4348ca48549ded8c056877befa216f0e768cb2c1)
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"allocation roundup size", by default set as 1Mb. From
advice by BlueArc about Windows client behaviour. VC++
people can set this to zero to turn it off.
Jeremy.
(This used to be commit 833ca101772bfab65dbd79eb64f63464177f144e)
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idea, and aparently improved performance in some circumstances, but it
breaks the VC++ compiler :-(. Not cool. Fix bug #2146.
Jeremy.
(This used to be commit b9f147634df0126320ffe3b9a23068e76f6c1681)
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Jeremy.
(This used to be commit 98a07e1520d6fb1f6f5320bc70ac33d4c5052ea6)
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code will do this correctly. More for bug #2201.
Jeremy.
(This used to be commit faecf639efdecf949e91184d041489aa54e8664f)
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FILE_SHARE_DELETE.
Not completely correct but will catch the XP SP2 problem.
Jeremy.
(This used to be commit 1e2d0fcdbb72735f8b53d9faaec07d711ae236d0)
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only care about failing with ACCESS_DENIED if we can't delete
with DELETE access requested. All other errors will be processed
as normal.
Jeremy.
(This used to be commit 360800592c55c9dd8fd787944b3d482f2b9eb951)
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to a WXPSP2 client we must do permission checking in userspace first
(this is a race condition but what can you do...). Needed for bugid #2227.
Jeremy.
(This used to be commit da23577f162b6bdca7d631fca256a9b3b04043e4)
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metze
(This used to be commit c0ee5922cdd4e57007e3a8f16cae71550fb38f2e)
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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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not an existing one.
Jeremy.
(This used to be commit fbbdb72cf1adfe567112556626f26b031747f440)
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consistent
enum type for Protocol extern.
Jeremy.
(This used to be commit 65dfae7ea45d4c9452b2a08efa09b01d870142f3)
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value is only valid on the initial trans/trans2/nttrans request,
so if there are secondary requests we can't read it from them. Read
it from the initial request and pass as a parameter for those functions
that need it.
Jeremy.
(This used to be commit e007845e67e0604321fb36b216a98e4fca1c98e1)
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Jeremy
(This used to be commit 10b2489e3b2345a8532098523ebcebb73665a76f)
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clients. This upsets the smb client in the Linux kernel (and Linus :-).
Jeremy.
(This used to be commit dad699ce0b36d23b80fe70b74d5e98df568a0495)
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try to
set security descriptors on shares where this has been turned off.
Jeremy.
(This used to be commit 9cbe685d02fa1d3778958a3ade4965b64e5d0169)
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opening of quota file.
Jeremy.
(This used to be commit 9a6e331639d7aace294dd663de7d27912fcae146)
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Jeremy.
(This used to be commit 756a00431105cf6349feb80a46b6f55a30eb3973)
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Jeremy.
(This used to be commit b52a04a5cdcea83c99805181241c8c0760bcc22e)
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our pathname parsing is consistent.
Jeremy.
(This used to be commit 5e8237e306f0bb0e492f10fb6487938132899384)
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we don't return the wrong error code on the next packet.
Jeremy.
(This used to be commit c1b06deb574d7b8e746bdf0d6f0eab16848a6cc1)
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fix. I'm
still doing more testing, but it fixes a behaviour that we've been wrong
on ever since the start of Samba.
Jeremy.
(This used to be commit 894cc6d16296b934c112786eec896846156aee5d)
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to connection struct entries (as they should have been from
the start). Jerry, once you've cut over to 3.0.4 release
branch I'll add this to 3.0 also.
- Jerry cut over :-).
Jeremy.
(This used to be commit 578a508509d21226ad3332fc54c3ab54cd8ae452)
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check_path_syntax.
Jeremy.
(This used to be commit 50ce579322ae394cb7c7a27e06f4ff08499b77b3)
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Jeremy.
(This used to be commit 8a58bd39da596cac68abc0143cdb17981642daf6)
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because someone changed it in all other places too
- fix quotas support from windows explorer
we now got the unix file name of a fake_file
metze
(This used to be commit 87e97d7723674e3835578ef080ce554d9c5537ac)
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