We regularly run AddressSanitizer and Valgrind on mozilla-central, so it
seems likely this is Thunderbird specific. Please file security bugs in
bugzilla with any reports you have found.

Andrew

On Thu, Aug 25, 2016 at 10:59 AM, ISHIKAWA,chiaki <ishik...@yk.rim.or.jp>
wrote:

> Hi,
>
> I occasionally check C-C TB by running |make mozmill| test suite under
> valgrind/memcheck for detecting memory issues.
>
> I ran such a test the day before and saw a flurry of memcheck warnings
> which I did not see in the test that was run back on May 12th.
>
> So in three months between, some memory errors were introduced.
>
> I checked them briefly and saw many errors related to wrappers for
> getenv().
> But I also saw some other issues which seemed rather disturbing.
> I am tied with a big project with a day job and not sure if I can follow
> up on these issues in a timely manner before it is too late.
>
> If anyone occasionally checks C-C TB or M-C FF using valgrind/memcheck by
> running xpcshell tests and mozmill test in the case of C-C TB), I urge such
> people to do the tests NOW so that we can figure out which patch sets
> introduced such memory issues before it becomes difficult to figure out the
> culprit.
>
> To wit, the frequency and types of warnings from a partial log (partial
> since it takes more than 24 hours to run the test, I had to quit it
> halfway).
>
>      12    Memcheck:Addr1
>     284    Memcheck:Addr2
>       4    Memcheck:Addr8
>      39    Memcheck:Cond
>       1    Memcheck:Param
>
> The number at the beginning of the line is the frequency of appearance in
> the log. (But do note that there are different errors reported under the
> same heading, Memcheck:Addr2, for example. This is disturbing enough since
> usually a known false positive often reports only the same code path.
>
> Yes, valgrind/memcheck can report false failures sometimes.
> But this time, the warnings are varied enough and some did look
> a problem like the access AFTER free (!) in one case. That should not be
> overlooked!!!
>
> TIA
>
> CI
>
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>
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