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Coverity null-ref patch - put prs_rpcbuffer_p
back to the way it was (with an additional
coverity paranoia check) - move the real test
into rpcbuf_alloc_size instead.
Jeremy.
(This used to be commit f74993e65c01bc0ef73d3e8710bb2f840910161a)
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in the code explicit - but this was a false positive (CID #16).
Jeremy.
(This used to be commit 43a0e869f2aee9b4e22d0d7fc92051e82f7536ad)
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problems. Ensure that if the parse succeeds on UNMARSHALL
we have a valid (although possibly empty) RPC_BUFFER returned.
Jeremy.
(This used to be commit d319cc9c08bfa865a6431a8631a9c609f589be1f)
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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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* \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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(This used to be commit e81e6e653aecdd0e4cfd2ea7ced16070bc376292)
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not provide an
RPC_BUFFER in the request
* add initial (but wire untested) support for RegRestoreKey()
(This used to be commit 22855c7aae940cc4082c231a470f612b8fc6fa0d)
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(This used to be commit f9e9a42c0734129100e1cdd4a9ad1539b65ab5bc)
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(This used to be commit 9b0bfd7e6fd1acc85ec53d2fa32d61cd34aa2345)
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segvs
(This used to be commit 25121547caaaed0d60f4db7458570c14e7d21b2a)
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