Wireshark mailing list archives
Re: g_mem-chunk_destroy does not free memory for GLib > 2.8
From: Bill Meier <wmeier () newsguy com>
Date: Tue, 20 Oct 2009 18:26:13 -0400
Jeff Morriss wrote:
Bill Meier wrote:Jeff Morriss wrote:Bill Meier wrote:I've found at least one case wherein se_alloc'd memory is referenced after it's been freed. (I think this case just happens to work because the memory wasn't yet reassigned).I was contemplating adding an optional memory-scrubber to ensure that we're not doing that: just writing 0xdeadbeef to the ep_ and se_ alloc'd memory when we free it.I was thinking the same thing ....I fixed a few cases of this and I'm not getting any more failures with the sample captures I have. Is the case you found fixed?
Unfortunately I don't quite remember the case I found. Was it the "dangling pointer to se'alloc'd memory" I mentioned in bug #4141 ? (If so I originally mis-interpreted the code in that there's no actual reference to the already freed se_alloc'd buffer). "Also note that currently for free_all_reassembled_fragments() that the 'key_arg' points to se_alloc'd memory which has already been freed."
If so, should we turn on memory scrubbing while fuzz testing?
Seems like a reasonable idea to me. We'd need to watch to see how much time is added to the fuzz-testing. Maybe only turn on scrubbing for one pass ? ___________________________________________________________________________ Sent via: Wireshark-dev mailing list <wireshark-dev () wireshark org> Archives: http://www.wireshark.org/lists/wireshark-dev Unsubscribe: https://wireshark.org/mailman/options/wireshark-dev mailto:wireshark-dev-request () wireshark org?subject=unsubscribe
Current thread:
- Re: g_mem-chunk_destroy does not free memory for GLib > 2.8, (continued)
- Re: g_mem-chunk_destroy does not free memory for GLib > 2.8 Bill Meier (Oct 10)
- Re: g_mem-chunk_destroy does not free memory for GLib > 2.8 Kovarththanan Rajaratnam (Oct 11)
- Re: g_mem-chunk_destroy does not free memory for GLib > 2.8 Kovarththanan Rajaratnam (Oct 11)
- Re: g_mem-chunk_destroy does not free memory for GLib > 2.8 Bill Meier (Oct 11)
- Re: g_mem-chunk_destroy does not free memory for GLib > 2.8 Anders Broman (Oct 12)
- Re: g_mem-chunk_destroy does not free memory for GLib > 2.8 Bill Meier (Oct 12)
- Re: g_mem-chunk_destroy does not free memory for GLib > 2.8 Bill Meier (Oct 15)
- Re: g_mem-chunk_destroy does not free memory for GLib > 2.8 Jeff Morriss (Oct 15)
- Re: g_mem-chunk_destroy does not free memory for GLib > 2.8 Bill Meier (Oct 15)
- Re: g_mem-chunk_destroy does not free memory for GLib > 2.8 Jeff Morriss (Oct 20)
- Re: g_mem-chunk_destroy does not free memory for GLib > 2.8 Bill Meier (Oct 20)
- Re: g_mem-chunk_destroy does not free memory for GLib > 2.8 Bill Meier (Oct 11)
- Re: g_mem-chunk_destroy does not free memory for GLib > 2.8 Bill Meier (Oct 19)
- Re: g_mem-chunk_destroy does not free memory for GLib > 2.8 Jaap Keuter (Oct 12)