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SubjectRe: Linux 4.18-rc7
On Mon, 30 Jul 2018 at 03:39, Linus Torvalds
<> wrote:
> So unless something odd happens, this should be the last rc for 4.18.
> Nothing particularly odd happened this last week - we got the usual
> random set of various minor fixes all over. About two thirds of it is
> drivers - networking, staging and usb stands out, but there's a little
> bit of stuff all over (clk, block, gpu, nvme..).
> Outside of drivers, the bulk is some core networking stuff, with
> random changes elsewhere (minor arch updates, filesystems, core
> kernel, test scripts).
> The appended shortlog gives a flavor of the details.
> Linus
> ---
> Kirill A. Shutemov (3):
> mm: introduce vma_init()
> mm: use vma_init() to initialize VMAs on stack and data segments
> mm: fix vma_is_anonymous() false-positives

Hi, I have run into AOSP userspace crash with v4.18-rc7, leading to
above mm patches. bfd40eaff5ab ("mm: fix vma_is_anonymous()
false-positives") to be specific. The same userspace is working fine
with v4.18-rc6.

I didn't yet look into what is going wrong from userspace point of
view, but I just wanted to give you a heads up on this. I'll be happy
to assist in further debugging/diagnosis if required.

Here is the crash log from logcat, if it helps:
F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
F DEBUG : Build fingerprint:
F DEBUG : Revision: '0'
F DEBUG : ABI: 'arm'
F DEBUG : pid: 2261, tid: 2261, name: zygote >>> zygote <<<
F DEBUG : signal 7 (SIGBUS), code 2 (BUS_ADRERR), fault addr 0xec00008
.. <snip> ..
F DEBUG : backtrace:
F DEBUG : #00 pc 00001c04 /system/lib/ (memset+48)
F DEBUG : #01 pc 0010c513 /system/lib/
F DEBUG : #02 pc 0015c601 /system/lib/
(art::gc::space::DlMallocSpace::CreateMspace(void*, unsigned int,
unsigned int)+40)
F DEBUG : #03 pc 0015c3ed /system/lib/
std::__1::basic_string<char, std::__
1::char_traits<char>, std::__1::allocator<char>> const&, unsigned int,
unsigned int, unsigned int, unsigned int, bool)+36)
F DEBUG : #04 pc 0013c9ab /system/lib/
(art::gc::Heap::Heap(unsigned int, unsigned int, unsigned int,
unsigned int, double, double, unsigned int, unsigned int,
std::__1::basic_string<char, std::__1::char_traits<char>,
std::__1::allocator<char>> const&, art::InstructionSet,
art::gc::CollectorType, art::gc::CollectorType,
art::gc::space::LargeObjectSpaceType, unsigned int, unsigned int,
unsigned int, bool, unsigned int, unsigned int, bool, bool, bool,
bool, bool, bool, bool, bool, bool, bool, bool, unsigned long
DEBUG : #05 pc 00318201 /system/lib/
DEBUG : #06 pc 0031af19 /system/lib/
std::__1::char_traits<char>, std::__1::allocator<char>>, void const*>,
std::__1::char_traits<char>, std::__1::allocator<char>>, void
const*>>> const&, bool)+68)
F DEBUG : #07 pc 0023c353 /system/lib/ (JNI_CreateJavaVM+658)
F DEBUG : #08 pc 0000205f /system/lib/
(android::AndroidRuntime::startVm(_JavaVM**, _JNIEnv**, bool)+5038)
F DEBUG : #09 pc 00002381 /system/lib/
(android::AndroidRuntime::start(char const*,
android::Vector<android::String8> const&, bool)+196)
F DEBUG : #10 pc 0000046b /system/bin/app_process32 (main+702)

Amit Pundir

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