Re: git clone http://git.savannah.gnu.org/cgit/xboard.git segfaults

From: Johannes Schindelin <johannes.schindelin@gmx.de>
Date: Aug 17, 2009, 14:22 UTC
Message-ID: <alpine.DEB.1.00.0908171620160.4991@intel-tinevez-2-302>
In-Reply-To: <alpine.DEB.1.00.0908171616340.4991@intel-tinevez-2-302>

Hi,

On Mon, 17 Aug 2009, Johannes Schindelin wrote:

Show 19 quoted lines

> On Mon, 17 Aug 2009, Ali Polatel wrote:
> 
> > Here's what gdb has to say about it:
> >
> > [...]
> 
> Here's what valgrind has to say about it (with a current 'next' + 
> patches):
> 
> ==25434== Invalid read of size 8
> ==25434==    at 0x407433: process_object_response (http-walker.c:91)
> ==25434==    by 0x405713: finish_active_slot (http.c:657)
> ==25434==    by 0x40448F: process_curl_messages (http.c:119)
> ==25434==    by 0x40546A: step_active_slots (http.c:571)
> ==25434==    by 0x4080E8: fetch_object (http-walker.c:476)
> ==25434==    by 0x408316: fetch (http-walker.c:526)
> ==25434==    by 0x42876C: loop (walker.c:176)
> ==25434==    by 0x428C65: walker_fetch (walker.c:287)
> ==25434==    by 0x40401F: main (remote-curl.c:111)

Oops, forgot the more important part:

==25434== Address 0x87a7bd0 is 0 bytes inside a block of size 64 free'd ==25434== at 0x4C265AF: free (vg_replace_malloc.c:323) ==25434== by 0x4075F5: release_object_request (http-walker.c:128) ==25434== by 0x408022: abort_object_request (http-walker.c:452) ==25434== by 0x4080D7: fetch_object (http-walker.c:470) ==25434== by 0x408316: fetch (http-walker.c:526) ==25434== by 0x42876C: loop (walker.c:176) ==25434== by 0x428C65: walker_fetch (walker.c:287) ==25434== by 0x40401F: main (remote-curl.c:111)

Seems that an object request is aborted, but the slot, and therefore the callback, is called nevertheless. Tay, does that ring a bell?

Ciao, Dscho