memory leaks in vfs_catia and vfs_cap modules ?
oliviersessink at gmail.com
Thu Feb 12 12:45:53 MST 2009
Jeremy Allison wrote:
> On Tue, Feb 10, 2009 at 09:35:26PM +0100, Olivier Sessink wrote:
>> Hi all,
>> while looking around in other code how to add a feature to the
>> scannedonly samba vfs module I either found some memory leaks in
>> vfs_catia and vfs_cap or I don't understand how samba manages the VFS
>> module memory.
>> Both vfs_catia and vfs_cap change the name of the files in their
>> _readdir() implementations. Both VFS modules allocate a new
>> SMB_STRUCT_DIRENT and return that to the caller. But both modules
>> don't keep track of the allocated pointer, so how is this memory ever
>> freed? The caller of the _readdir() function is not supposed to free
>> the result, right?
>> Can anyone shed some light on this issue? Is my understanding of the
>> VFS module memory management wrong, or are there indeed memory leaks
>> in these modules?
> Just looking at the vfs_catia module it uses TALLOC_ARRAY(talloc_tos(),
> to allocate the new SMB_STRUCT_DIRENT. The talloc library keeps track
> of the allocated pointer, and as soon as the talloc frame returned by
> talloc_tos() is freed, (usually the calling function), then the memory
> is freed.
ahh thanks! so my understanding of the code was the issue :)
I'll use the talloc function too then.
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