Mailinglist Archive: opensuse-factory (340 mails)

[Marcus Meissner <meissner@xxxxxxx>]

On Tue, Apr 21, 2009 at 04:24:40PM +0200, Wolfgang Rosenauer wrote:
> Hi,
>
> I've got a real weird issue by trying to update mozilla-nss for Factory
> what I can only interpret as compiler issue or very weird coding issue.
>
> mozilla-nss is running a comprehensive test suite during build which
> currently only seems to fail on openSUSE_Factory i586.
>
> It apparently works on x86_64, all older distributions and also in
> Factory_staging.
>
> https://build.opensuse.org/package/show?package=mozilla-nss&project=mozilla%3AFactory
>
> In the failing buildlog one can see that it's crashing on a tool called
> signtool with free() on an invalid pointer. (search for "- FAILED").
>
> When I build locally I also get those cores dumped and looked into two
> of them which show the following stack:
>
> (gdb) bt
> #0  0xb7be39d6 in raise () from /lib/libc.so.6
> #1  0xb7be52d8 in abort () from /lib/libc.so.6
> #2  0xb7c1fa25 in ?? () from /lib/libc.so.6
> #3  0xb7c259c5 in ?? () from /lib/libc.so.6
> #4  0xb7c2727b in free () from /lib/libc.so.6
> #5  0xb7d45ab7 in PR_Free () from /usr/lib/libnspr4.so
> #6  0xb7d89f41 in PORT_Free_Util (ptr=0x0) at secport.c:152
> #7  0x0805b146 in jar_extract_mf (jar=0x8091f90, format=<value optimized
> out>,
>     fp=0x8092048, ext=0x806a210 "sf") at jarfile.c:737
> #8  0x0805b5b2 in jar_extract_manifests (fp=<value optimized out>,
>     format=<value optimized out>, jar=<value optimized out>) at
> jarfile.c:611
> #9  JAR_pass_archive (jar=0x8091f90, format=jarArchZip,
>     filename=0x80795c8 "nojs.jar", url=0x806c5f1 "some-url") at
> jarfile.c:134
> #10 0x08057c32 in VerifyJar (filename=0x80795c8 "nojs.jar") at verify.c:74
> #11 0x0804e7fe in main (argc=9, argv=0xbfa54424) at signtool.c:1007
>
>
> Looking at secport.c:152 I find:
> void
> PORT_Free(void *ptr)
> {
>     if (ptr) {
>         PR_Free(ptr);
>     }
> }
>
> I'm really confused how the above stack can happen at all if ptr=0x0.
>
> That's the reason why I'm actually thinking about some weird toolchain
> thing. That's a _bit_ important to me as I need to update NSS for
> different reasons and I don't want to disable the testsuite.
>
> Any pointers for me on that?

free (NULL); is a good operation and will not abort().

ptr is not NULL at this point in time I think, the backtrace is just a bit 
erroneous.

However, you corrupted memory earlier somewhere.

Can you run this in valgrind?

Ciao, Marcus
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