Starting daemon causes segfault (arm64e, M1 mini, 2020)

[j1ah0ng]

Issue: Starting the GUI as a normal user, clicking "install" and authenticating results in "Daemon Status" and "Daemon Running" both turning green briefly, before settling on the following state:

Environment: macOS Monterey, M1 mini (2020)

$ uname -a
Darwin mini.local 21.2.0 Darwin Kernel Version 21.2.0: Sun Nov 28 20:29:10 PST 2021; root:xnu-8019.61.5~1/RELEASE_ARM64_T8101 arm64

Build: (from master as of 01-17)

$ git rev-parse HEAD
f53893276beebfb006771144f0ec01416f88017f
$ cmake -DCMAKE_BUILD_TYPE=Debug -DCMAKE_OSX_ARCHITECTURES=arm64e -B build .
$ cmake --build build -- install -j$(nproc)
$ sudo mv build/dist/Odourless /Applications

[j1ah0ng]

It seems like something is causing a segfault in the daemon process. Running the daemon by hand:

/Applications/Odourless.app/Contents/Resources/bin $ sudo ./odourless-daemon
[1]    32272 trace trap  sudo ./odourless-daemon

and in a debugger:

/Applications/Odourless.app/Contents/Resources/bin $ lldb odourless-daemon 
(lldb) target create "odourless-daemon"
b main
Current executable set to '/Applications/Odourless.app/Contents/Resources/bin/odourless-daemon' (arm64e).
(lldb) b main
Breakpoint 1: 22 locations.
(lldb) r
Process 32227 launched: '/Applications/Odourless.app/Contents/Resources/bin/odourless-daemon' (arm64e)
Process 32227 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1
    frame #0: 0x0000000100008e88 odourless-daemon`main
odourless-daemon`main:
->  0x100008e88 <+0>:  pacibsp 
    0x100008e8c <+4>:  sub    sp, sp, #0x1a0            ; =0x1a0 
    0x100008e90 <+8>:  stp    x28, x27, [sp, #0x180]
    0x100008e94 <+12>: stp    x29, x30, [sp, #0x190]
Target 0: (odourless-daemon) stopped.
(lldb) n
Process 32227 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = instruction step over
    frame #0: 0x0000000100008e8c odourless-daemon`main + 4
odourless-daemon`main:
->  0x100008e8c <+4>:  sub    sp, sp, #0x1a0            ; =0x1a0 
    0x100008e90 <+8>:  stp    x28, x27, [sp, #0x180]
    0x100008e94 <+12>: stp    x29, x30, [sp, #0x190]
    0x100008e98 <+16>: add    x29, sp, #0x190           ; =0x190 
Target 0: (odourless-daemon) stopped.

... (next instruction) multiple times ...

(lldb) 
Process 32227 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = instruction step over
    frame #0: 0x0000000100008ed4 odourless-daemon`main + 76
odourless-daemon`main:
->  0x100008ed4 <+76>: bl     0x10000b1f8               ; Log::init(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)
    0x100008ed8 <+80>: sub    x0, x29, #0x38            ; =0x38 
    0x100008edc <+84>: bl     0x1002d86cc               ; ___lldb_unnamed_symbol6485$$odourless-daemon
    0x100008ee0 <+88>: bl     0x1002dcfd8               ; symbol stub for: getuid
Target 0: (odourless-daemon) stopped.
(lldb) 
Process 32227 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x2000010051c840)
Note: Possible pointer authentication failure detected.
Found value that failed to authenticate at address=0x10051c840.

    frame #0: 0x000000010000d32c odourless-daemon`___lldb_unnamed_symbol284$$odourless-daemon + 60
odourless-daemon`___lldb_unnamed_symbol284$$odourless-daemon:
->  0x10000d32c <+60>: brk    #0xc472
    0x10000d330 <+64>: add    x9, x16, #0x38            ; =0x38 
    0x10000d334 <+68>: ldr    x8, [x16, #0x38]
    0x10000d338 <+72>: mov    x17, x9
Target 0: (odourless-daemon) stopped.
(lldb) ^D

The log file at /usr/local/var/.odourless_cage/daemon.log is never created.

[xiaozhuai]

duplicated #6