Bug#1016811: libwebkit2gtk-4.0-37: bullseye backport crashes a lot on arm64

[Dominique MARTINET]

Hi,

Alberto Garcia wrote on Wed, Aug 17, 2022 at 10:31:22AM +0000:
> Thanks, I just forwarded the bug upstream, I'll try to reproduce it
> myself this or next week.

I've also been observing similar crashes on aarch64 bullseye package
and using bookworm is not an option for me (thanks to proprietary
drivers...)


The traces are slightly different:

/usr/lib/aarch64-linux-gnu/webkit2gtk-4.0/WebKitNetworkProcess
(gdb) bt
#0  __GI_raise (sig=sig at entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#1  0x0000ffff7cfdfaa0 in __GI_abort () at abort.c:79
#2  0x0000ffff7fa8ac50 in WTFCrashWithInfo(int, char const*, char const*, int) () at WTF/Headers/wtf/Assertions.h:741
#3  0x0000ffff80a2d5a8 in captureStackTrace () at ../Source/WTF/wtf/StackTrace.cpp:79
#4  0x0000ffff80a08ea0 in WTFReleaseLogStackTrace () at ../Source/WTF/wtf/Assertions.cpp:592
#5  0x0000ffff83c06550 in internalError () at ../Source/WebCore/platform/network/ResourceErrorBase.cpp:97
#6  0x0000ffff820e8d1c in preconnectTo () at ../Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.cpp:735
#7  0x0000ffff81fc62f4 in callMemberFunctionImpl<WebKit::NetworkConnectionToWebProcess, void (WebKit::NetworkConnectionToWebProcess::*)(std::optional<WTF::ObjectIdentifier<WebCore::ResourceLoader> >, WebKit::NetworkResourceLoadParameters&&), std::tuple<std::optional<WTF::ObjectIdentifier<WebCore::ResourceLoader> >, WebKit::NetworkResourceLoadParameters>, 0, 1> () at ../Source/WebKit/Platform/IPC/HandleMessage.h:125
#8  callMemberFunction<WebKit::NetworkConnectionToWebProcess, void (WebKit::NetworkConnectionToWebProcess::*)(std::optional<WTF::ObjectIdentifier<WebCore::ResourceLoader> >, WebKit::NetworkResourceLoadParameters&&), std::tuple<std::optional<WTF::ObjectIdentifier<WebCore::ResourceLoader> >, WebKit::NetworkResourceLoadParameters>, std::integer_sequence<unsigned long, 0, 1> > () at ../Source/WebKit/Platform/IPC/HandleMessage.h:131
#9  handleMessage<Messages::NetworkConnectionToWebProcess::PreconnectTo, WebKit::NetworkConnectionToWebProcess, void (WebKit::NetworkConnectionToWebProcess::*)(std::optional<WTF::ObjectIdentifier<WebCore::ResourceLoader> >, WebKit::NetworkResourceLoadParameters&&)> () at ../Source/WebKit/Platform/IPC/HandleMessage.h:196
#10 didReceiveNetworkConnectionToWebProcessMessage () at DerivedSources/WebKit/NetworkConnectionToWebProcessMessageReceiver.cpp:479
#11 0x0000ffff822543d0 in dispatchMessage () at ../Source/WebKit/Platform/IPC/Connection.cpp:1134
#12 0x0000ffff82254768 in dispatchOneIncomingMessage () at ../Source/WebKit/Platform/IPC/Connection.cpp:1203
#13 0x0000ffff80a2bf40 in operator() () at ../Source/WTF/wtf/Function.h:82
#14 performWork () at ../Source/WTF/wtf/RunLoop.cpp:133
#15 0x0000ffff80a85190 in operator() () at ../Source/WTF/wtf/glib/RunLoopGLib.cpp:80
#16 __invoke () at ../Source/WTF/wtf/glib/RunLoopGLib.cpp:79
#17 0x0000ffff80a84524 in operator() () at ../Source/WTF/wtf/glib/RunLoopGLib.cpp:53
#18 __invoke () at ../Source/WTF/wtf/glib/RunLoopGLib.cpp:45
#19 0x0000ffff7d551ab4 in g_main_context_dispatch () from /usr/lib/aarch64-linux-gnu/libglib-2.0.so.0
#20 0x0000ffff7d551e5c in ?? () from /usr/lib/aarch64-linux-gnu/libglib-2.0.so.0
#21 0x0000ffff7d5521b0 in g_main_loop_run () from /usr/lib/aarch64-linux-gnu/libglib-2.0.so.0
#22 0x0000ffff80a84b20 in run () at ../Source/WTF/wtf/glib/RunLoopGLib.cpp:108
#23 0x0000ffff822280d8 in run () at ../Source/WebKit/Shared/AuxiliaryProcessMain.h:70
#24 AuxiliaryProcessMain<WebKit::NetworkProcessMainSoup> () at ../Source/WebKit/Shared/AuxiliaryProcessMain.h:96
#25 0x0000ffff7cfdfe18 in __libc_start_main (main=0x400878 <__wrap_main>, argc=3, argv=0xfffff1c90058, init=<optimized out>, fini=<optimized out>,
    rtld_fini=<optimized out>, stack_end=<optimized out>) at ../csu/libc-start.c:308
    #26 0x0000000000400874 in _start ()


/usr/lib/aarch64-linux-gnu/webkit2gtk-4.0/WebKitWebProcess
(gdb) bt
#0  __GI_raise (sig=sig at entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#1  0x0000ffff99831aa0 in __GI_abort () at abort.c:79
#2  0x0000ffff9c2dcc50 in WTFCrashWithInfo(int, char const*, char const*, int) () at WTF/Headers/wtf/Assertions.h:741
#3  0x0000ffff9d27f5a8 in captureStackTrace () at ../Source/WTF/wtf/StackTrace.cpp:79
#4  0x0000ffff9d25aea0 in WTFReleaseLogStackTrace () at ../Source/WTF/wtf/Assertions.cpp:592
#5  0x0000ffffa0458550 in internalError () at ../Source/WebCore/platform/network/ResourceErrorBase.cpp:97
#6  0x0000ffff9edead30 in internallyFailedLoadTimerFired () at ../Source/WebKit/WebProcess/Network/WebLoaderStrategy.cpp:495
#7  0x0000ffff9d2d723c in operator() () at ../Source/WTF/wtf/glib/RunLoopGLib.cpp:177
#8  __invoke () at ../Source/WTF/wtf/glib/RunLoopGLib.cpp:169
#9  0x0000ffff9d2d6524 in operator() () at ../Source/WTF/wtf/glib/RunLoopGLib.cpp:53
#10 __invoke () at ../Source/WTF/wtf/glib/RunLoopGLib.cpp:45
#11 0x0000ffff99da3ab4 in g_main_context_dispatch () from /usr/lib/aarch64-linux-gnu/libglib-2.0.so.0
#12 0x0000ffff99da3e5c in ?? () from /usr/lib/aarch64-linux-gnu/libglib-2.0.so.0
#13 0x0000ffff99da41b0 in g_main_loop_run () from /usr/lib/aarch64-linux-gnu/libglib-2.0.so.0
#14 0x0000ffff9d2d6b20 in run () at ../Source/WTF/wtf/glib/RunLoopGLib.cpp:108
#15 0x0000ffff9eea47c4 in run () at ../Source/WebKit/Shared/AuxiliaryProcessMain.h:70
#16 AuxiliaryProcessMain<WebKit::WebProcessMainGtk> () at ../Source/WebKit/Shared/AuxiliaryProcessMain.h:96
#17 0x0000ffff99831e18 in __libc_start_main (main=0x400878 <__wrap_main>, argc=3, argv=0xfffff7b85168, init=<optimized out>, fini=<optimized out>,
    rtld_fini=<optimized out>, stack_end=<optimized out>) at ../csu/libc-start.c:308
    #18 0x0000000000400874 in _start ()



hopefully the root of the problem is the same and having debug symbols
installed will help pinpoint what's wrong.

(a likely reason it's different is I run with WEBKIT_FORCE_SANDBOX=0
because the sandbox forbids access to GPU driver /dev non-standard
node... but honestly at this point it could be completely different,
I wasn't sure if I should open a new bug report or not :/)

I've downloaded the sources and will start looking into it as free time
permits.


Thanks,
-- 
Dominique Martinet