Package: firefox
Version: 134.0.2-2
Severity: important
X-Debbugs-Cc: Mike Hommey <gland...@debian.org>, Sebastian Reichel 
<s...@debian.org>

Hi,

I see a lot of tab crashes with Debian's firefox binary on arm64 based
T14s Gen6 Snapdragon. Usually when starting firefox or opening a new tab
I am greeted with the tab crash reporter. After a few tries a page is
actually rendered, so its not 100% broken. But with 80% crashes it is
more or less unusable. The same setup on amd64 runs fine and the crashes
also happen in safe mode / without a profile.

Apparently there is no firefox arm64 version in flathub, but I tried the
librewolf 134.0.2 fork from there and I haven't seen a single crash with
that. This suggests the crashes are somehow specific to the Debian
version.

I used minidump-stackwalk as suggested by the firefox project to get
a stacktrace for a few of the dmp files generated by firefox and it
always seems to be due to SIGILL originating from locked_profiler_start
as in the following output from minidump-stackwalk.

--------------------------------------------------------------------------
Operating system: Linux
                  6.13.0-00060-gcb8f62213e45 #55 SMP PREEMPT Tue Jan 21 
23:24:18 CET 2025
CPU: arm64
     12 CPUs
Linux debian  - trixie (Debian GNU/Linux trixie/sid)

Crash reason:  SIGILL / ILL_ILLOPN
Crash address: 0x0000fffff7c071b0
Process uptime: not available

Linux memory map count: 782

Thread 23 WebExtensions (crashed) - tid: 91889
 0  libgcc_s.so.1!aarch64_demangle_return_addr [aarch64-unwind.h : 75]
    Found by: inlining
 1  libgcc_s.so.1!uw_update_context [unwind-dw2.c : 1287 + 0x18]
      x0 = 0x0000000000000000     x1 = 0x000000000000000a
      x2 = 0x0000fffff7fe13d0     x3 = 0x0003ffffdff84f44
      x4 = 0x0000000000000010     x5 = 0x0080808000800000
      x6 = 0x16fefeff2eff1e0b     x7 = 0x7f7f7f7f7f7f7f7f
      x8 = 0x0101010101010101     x9 = 0x0000fffff7c202a8
     x10 = 0x0000000000000000    x11 = 0x0000fffff7c20308
     x12 = 0x0000000000000000    x13 = 0x0000000000000000
     x14 = 0x0000000000000000    x15 = 0x0000000000000028
     x16 = 0x0000ffffe2ae2590    x17 = 0x0043fffff1aa6434
     x18 = 0x0000000000000002    x19 = 0x0000ffffe2ae1970
     x20 = 0x0000ffffe2ae2590    x21 = 0x0043fffff1aa6434
     x22 = 0x0000ffffe2ae2108    x23 = 0x0000aaaaaab29ff8
     x24 = 0x0000000000000021    x25 = 0x0000aaaaaab67000
     x26 = 0x0000000000000000    x27 = 0x0000ffffe2ae2258
     x28 = 0x0000ffffe2ae3140     fp = 0x0000ffffe2ae18a0
      lr = 0x0000fffff7c07168     sp = 0x0000ffffe2ae18a0
      pc = 0x0000fffff7c071b0
    Found by: given as instruction pointer in context
 2  libgcc_s.so.1!_Unwind_Backtrace [unwind.inc : 326 + 0x8]
      sp = 0x0000ffffe2ae18b0     pc = 0x0000fffff7c07adc
    Found by: previous frame's frame pointer
 3  firefox!<name omitted> [platform.cpp : 171]
    Found by: inlining
 4  
firefox!mozilla::baseprofiler::locked_profiler_start(mozilla::baseprofiler::PSAutoLock
 const&, mozilla::PowerOfTwo<unsigned int>, double, unsigned int, char const**, 
unsigned int, mozilla::Maybe<double> const&) [platform.cpp : 3114 + 0x74]
      sp = 0x0000ffffe2ae18e0     pc = 0x0000aaaaaab29fcc
    Found by: previous frame's frame pointer

[...] (shortened to the relevant part) [...]
--------------------------------------------------------------------------

Greetings,

Sebastian

-- System Information:
Debian Release: trixie/sid
  APT prefers testing-debug
  APT policy: (500, 'testing-debug'), (500, 'testing'), (250, 'unstable')
Architecture: arm64 (aarch64)
Foreign Architectures: armhf

Kernel: Linux 6.13.0-00060-gcb8f62213e45 (SMP w/12 CPU threads; PREEMPT)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages firefox depends on:
ii  debianutils          5.21
ii  fontconfig           2.15.0-2
ii  libasound2t64        1.2.13-1+b1
ii  libatk1.0-0t64       2.55.0.1-1
ii  libc6                2.40-5
ii  libcairo-gobject2    1.18.2-2
ii  libcairo2            1.18.2-2
ii  libdbus-1-3          1.16.0-1
ii  libevent-2.1-7t64    2.1.12-stable-10+b1
ii  libffi8              3.4.6-1
ii  libfontconfig1       2.15.0-2
ii  libfreetype6         2.13.3+dfsg-1
ii  libgcc-s1            14.2.0-12
ii  libgdk-pixbuf-2.0-0  2.42.12+dfsg-2
ii  libglib2.0-0t64      2.82.4-2
ii  libgtk-3-0t64        3.24.43-5
ii  libnspr4             2:4.36-1
ii  libnss3              2:3.107-1
ii  libpango-1.0-0       1.56.1-1
ii  libstdc++6           14.2.0-12
ii  libvpx9              1.15.0-1
ii  libx11-6             2:1.8.10-2
ii  libx11-xcb1          2:1.8.10-2
ii  libxcb-shm0          1.17.0-2+b1
ii  libxcb1              1.17.0-2+b1
ii  libxcomposite1       1:0.4.6-1
ii  libxdamage1          1:1.1.6-1+b2
ii  libxext6             2:1.3.4-1+b3
ii  libxfixes3           1:6.0.0-2+b4
ii  libxrandr2           2:1.5.4-1+b3
ii  procps               2:4.0.4-6
ii  zlib1g               1:1.3.dfsg+really1.3.1-1+b1

Versions of packages firefox recommends:
ii  libavcodec61  7:7.1-3+b2

Versions of packages firefox suggests:
ii  fonts-lmodern          2.005-1
pn  fonts-stix | otf-stix  <none>
ii  libcanberra0           0.30-17+b1
ii  libgssapi-krb5-2       1.21.3-3
pn  pulseaudio             <none>

-- no debconf information

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