The test failed with

> Test "test5 user should not be able to run commands under root" failed with
> error: "invalid literal for int() with base 10: ''"

since 2492da8.

The reason for this is that `sudo(8)` writes the lecture to the
tty[1] and only as a fallback to stdout[2]. This means that the
`base64 --wrap 0` executed by `machine.execute()` doesn't affect the
text written to the terminal, however the lecture is part of the string
that's read from the VM via `shell.recv()`.

I confirmed the problem in an interactive test session[3]:

    >>> command = "sudo -u test5 sudo -n -u root true"
    >>> out_command = f"( set -euo pipefail; {command} ) | (base64 --wrap 0; echo)\n"
    >>> machine.shell.send(out_command.encode())
    84

    >>> machine # [   99.015512] sudo[877]:     root : TTY=hvc0 ; PWD=/tmp ; USER=test5 ; COMMAND=/run/wrappers/bin/sudo -n -u root true
    machine # [   99.019373] sudo[877]: pam_unix(sudo:session): session opened for user test5(uid=1005) by (uid=0)
    machine # [   99.038692] sudo[879]: pam_unix(sudo:auth): conversation failed
    machine # sudo: a password is required
    machine # [   99.041860] sudo[879]: pam_unix(sudo:auth): auth could not identify password for [test5]
    machine # [   99.046901] sudo[877]: pam_unix(sudo:session): session closed for user test5
    >>>
    >>> x=machine._next_newline_closed_block_from_shell()
    >>> print(x)
    <newline>
    We trust you have received the usual lecture from the local System
    Administrator. It usually boils down to these three things:
    <newline>
        #1) Respect the privacy of others.
        #2) Think before you type.
        #3) With great power comes great responsibility.
    <newline>
    <newline>
    <newline>
    >>>

Since the lecture isn't strictly necessary to confirm that
`security.sudo` works as expected, I decided to disable lecturing
inside the test, however we may want to fix the underlying problem in
the test-driver at some point.

[1] https://github.com/sudo-project/sudo/blob/SUDO_1_9_9/plugins/sudoers/check.c#L275-L283
[2] https://github.com/sudo-project/sudo/blob/SUDO_1_9_9/src/conversation.c#L95-L120
[3] I replaced each empty line with `<newline>` to make sure these
    aren't swallowed by git.

…lib.importJSON ./file.json #2

flutter: Separate cache and unwrapped derivations #2

1.2.1: Bug fix release:

Single bug fix (#1) that fixes regression in `perf` tool caused by libbpf
resetting its custom catch-all `SEC()` handler on explicit
`bpf_program__set_type()` call.

Given setting custom `SEC()` handlers is rarely used and pretty
esoteric feature of libbpf, most users should not be affected.

1.2.2: One more fix:

 - Fix (#2) possible double-free in USDT-related libbpf code, which
happens when libbpf runs out of space in `__bpf_usdt_specs` map due
to having too many unique USDT specs. Running out of space can be
mitigated by bumping up `BPF_USDT_MAX_SPEC_CNT` define before including
`bpf/usdt.bpf.h` header in BPF-side code.
This will prevent the double-free as a side effect (and will make it
possible to successfully attach all requested USDTs), which is a
recommended work-around for libbpf versions prior to v1.2.2.

Link: libbpf/libbpf@e4d3827 #1
Link: libbpf/libbpf@f117080 #2

gh: 2.41.0 -> 2.42.1

Since ba83271 the build fails with

    applying patch /nix/store/46rxbbvl2l3mrxb50y9rzy7ahgx0lraj-d741901dddd731895346636c0d3556c6fa51fbe6.patch
    patching file tests/hazmat/primitives/test_aead.py
    Hunk #1 FAILED at 56.
    Hunk #2 FAILED at 197.
    Hunk #3 FAILED at 378.
    Hunk #4 FAILED at 525.
    Hunk NixOS#5 FAILED at 700.
    Hunk NixOS#6 FAILED at 844.
    6 out of 6 hunks FAILED -- saving rejects to file tests/hazmat/primitives/test_aead.py.rej

Without the change `unnethack` startup crashes as:

    (gdb) bt
    #0  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
    #1  0x00007f734250c0e3 in __pthread_kill_internal (signo=6, threadid=<optimized out>) at pthread_kill.c:78
    #2  0x00007f73424bce06 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
    #3  0x00007f73424a58f5 in __GI_abort () at abort.c:79
    #4  0x00007f73424a67a1 in __libc_message (fmt=fmt@entry=0x7f734261e2f8 "*** %s ***: terminated\n") at ../sysdeps/posix/libc_fatal.c:150
    NixOS#5  0x00007f734259b1d9 in __GI___fortify_fail (msg=msg@entry=0x7f734261e2df "buffer overflow detected") at fortify_fail.c:24
    NixOS#6  0x00007f734259ab94 in __GI___chk_fail () at chk_fail.c:28
    NixOS#7  0x00000000005b2ac5 in strcpy (__src=0x7ffe68838b00 "Shall I pick a character's race, role, gender and alignment for you? [YNTQ] (y)",
        __dest=0x7ffe68838990 "\001") at /nix/store/B0S2LKF593R3585038WS4JD3LYLF2WDX-glibc-2.38-44-dev/include/bits/string_fortified.h:79
    NixOS#8  curses_break_str (str=str@entry=0x7ffe68838b00 "Shall I pick a character's race, role, gender and alignment for you? [YNTQ] (y)", width=width@entry=163,
        line_num=line_num@entry=1) at ../win/curses/cursmisc.c:275
    NixOS#9  0x00000000005b3f51 in curses_character_input_dialog (prompt=prompt@entry=0x7ffe68838cf0 "Shall I pick a character's race, role, gender and alignment for you?",
        choices=choices@entry=0x7ffe68838d70 "YNTQ", def=def@entry=121) at ../win/curses/cursdial.c:211
    NixOS#10 0x00000000005b9ca0 in curses_choose_character () at ../win/curses/cursinit.c:556
    NixOS#11 0x0000000000404eb1 in main (argc=<optimized out>, argv=<optimized out>) at ./../sys/unix/unixmain.c:309

which corresponds to `gcc` warning:

    ../win/curses/cursmisc.c: In function 'curses_break_str':
    ../win/curses/cursmisc.c:275:5: warning: '__builtin___strcpy_chk' writing one too many bytes into a region of a size that depends on 'strlen' [-Wstringop-overflow=]
      275 |     strcpy(substr, str);
          |     ^

I did not find a single small upstream change that fixes it. Let's
disable `fortify3` until next release.

Closes: NixOS#292113

This test crashes the python interpreter in libx265_encode_stream:

```
 #0  0x00007feefe2a7a7e in free () from /nix/store/81mi7m3k3wsiz9rrrg636sx21psj20hc-glibc-2.40-66/lib/libc.so.6
 No symbol table info available.
 #1  0x00007fee98059295 in av_free (ptr=<optimized out>) at libavutil/mem.c:243
 No locals.
 #2  0x00007fee98059352 in av_freep (arg=<optimized out>) at libavutil/mem.c:253
        val = <optimized out>
 #3  0x00007fee997a4713 in libx265_encode_frame (avctx=<optimized out>, pkt=<optimized out>, pic=<optimized out>,
    got_packet=0x7ffe35c7e3f4) at libavcodec/libx265.c:821
    [...]
 #4  0x00007fee99526ff6 in ff_encode_encode_cb (avctx=avctx@entry=0x16d1f00, avpkt=avpkt@entry=0x16ad440, frame=0x16f5e80, got_packet=got_packet@entry=0x7ffe35c7e3f4) at libavcodec/encode.c:254
        codec = 0x7fee9a25e5c0 <ff_libx265_encoder>
 [...]
```

Prior to this the `dev` output was also propagated, when it's not
actually used

```console
$ nix-store --query --references /nix/store/ppw0flx4dbksxsnr84hq1gz4k0s0hpcq-nixos-rebuild-ng-0.0.0
/nix/store/11ciq72n4fdv8rw6wgjgasfv4mjs1jrw-bash-5.2p37
/nix/store/26yi95240650jxp5dj78xzch70i1kzlz-python3-3.12.9
/nix/store/xxh7mivp64xmzyw5wir2c2xbhy6cjzjd-nix-2.24.12
/nix/store/8jai5cxdfzgj9nsz4i26fh9sx5zsgilz-nix-2.24.12-dev
/nix/store/ppw0flx4dbksxsnr84hq1gz4k0s0hpcq-nixos-rebuild-ng-0.0.0
```

```console
$ nix why-depends --all --precise /nix/store/ppw0flx4dbksxsnr84hq1gz4k0s0hpcq-nixos-rebuild-ng-0.0.0 /nix/store/8jai5cxdfzgj9nsz4i26fh9sx5zsgilz-nix-2.24.12-dev
/nix/store/ppw0flx4dbksxsnr84hq1gz4k0s0hpcq-nixos-rebuild-ng-0.0.0
└───nix-support/propagated-build-inputs: …/nix/store/8jai5cxdfzgj9nsz4i26fh9sx5zsgilz-nix-2.24.12-dev /nix/store/26yi…
    → /nix/store/8jai5cxdfzgj9nsz4i26fh9sx5zsgilz-nix-2.24.12-dev
```

```console
$ nvd diff /nix/store/ppw0flx4dbksxsnr84hq1gz4k0s0hpcq-nixos-rebuild-ng-0.0.0 /nix/store/fqm81bhggzkqh7033np2z0jr8c0qrpbw-nixos-rebuild-ng-0.0.0
<<< /nix/store/ppw0flx4dbksxsnr84hq1gz4k0s0hpcq-nixos-rebuild-ng-0.0.0
>>> /nix/store/fqm81bhggzkqh7033np2z0jr8c0qrpbw-nixos-rebuild-ng-0.0.0
Version changes:
[C.]  #1  boehm-gc  8.2.8, 8.2.8-dev -> 8.2.8
[C*]  #2  nix       2.24.12, 2.24.12-dev, 2.24.12-man -> 2.24.12, 2.24.12-man
Removed packages:
[R.]  #1  nlohmann_json  3.11.3
Closure size: 66 -> 63 (1 paths added, 4 paths removed, delta -3, disk usage -1.9MiB).
```

fluent-bit 3.2.7, 3.2.8 and 3.2.9 are segfaulting when
used in combination with the systemd input. Lets
revert to 3.2.6 for now.

Upstream bug: fluent/fluent-bit#10139

Note that fluent-bit-3.2.7 fixes two high CVEs which we are now
reintroducing. However they are only exploitable if you are
using the OpenTelemetry input or the Prometheus Remote Write input.

OpenTelemetry input: [CVE-2024-50609](https://nvd.nist.gov/vuln/detail/CVE-2024-50609)
Prometheus Remote Write input: [CVE-2024-50608](https://nvd.nist.gov/vuln/detail/CVE-2024-50608)

The problem is as follows:

3.2.7 started vendoring a copy of `libzstd` in tree and statically
linking against it. Also, the fluent-bit binary exports the symbols
of static libraries it links against.

This is a problem because `libzstd` gets `dlopen()`ed by `libsystemd`
when enumerating the journal (as journal logs are zstd compressed). and `libzstd` in Nixpkgs is built
with `-DZSTD_LEGACY_SUPPORT=0` which causes `struct ZSTD_DCtx` to be 16
bytes smaller than without this flag https://github.com/facebook/zstd/blob/dev/lib/decompress/zstd_decompress_internal.h#L183-L187

`libsystemd` calls [`sym_ZSTD_createDCtx()`](https://github.com/systemd/systemd/blob/1e79a2923364b65fc9f347884dd5b9b2087f6e32/src/basic/compress.c#L480)
which calls the function pointer returned by `dlsym()` which is calling into
the `libzstd` that comes with `nixpkgs` and thus allocates a struct that is 16 bytes smaller.

Later then `sym_ZSTD_freeDCtx()` is called. However because fluent-bit
has `zstd` in its global symbol table, any functions that `sym_ZSTD_freeDCtx()`
calls will be calls to the functions in the vendored fluent-bit version of the library
which expects the larger struct. This then causes enough heap corruption to cause
a segfault.

E.g. the subsequent calls to `ZSTD_clearDict(dctx)` and `ZSTD_customFree(dctx->inBuff)`
in https://github.com/facebook/zstd/blob/dev/lib/decompress/zstd_decompress.c#L324
will be working on a struct that is 16 bytes smaller than the one that was allocated
by `libsystemd` and will cause a segfault at some point and thus are probably modifying
pieces of memory that they shouldn't

	(gdb) bt
	#0  0x00007f10e7e9916c in __pthread_kill_implementation () from /nix/store/rmy663w9p7xb202rcln4jjzmvivznmz8-glibc-2.40-66/lib/libc.so.6
	#1  0x00007f10e7e40e86 in raise () from /nix/store/rmy663w9p7xb202rcln4jjzmvivznmz8-glibc-2.40-66/lib/libc.so.6
	#2  0x00007f10e7e2893a in abort () from /nix/store/rmy663w9p7xb202rcln4jjzmvivznmz8-glibc-2.40-66/lib/libc.so.6
	#3  0x000000000046a938 in flb_signal_handler ()
	#4  <signal handler called>
	NixOS#5  0x00007f10e7ea42b7 in unlink_chunk.isra () from /nix/store/rmy663w9p7xb202rcln4jjzmvivznmz8-glibc-2.40-66/lib/libc.so.6
	NixOS#6  0x00007f10e7ea45cd in _int_free_create_chunk () from /nix/store/rmy663w9p7xb202rcln4jjzmvivznmz8-glibc-2.40-66/lib/libc.so.6
	NixOS#7  0x00007f10e7ea5a1c in _int_free_merge_chunk () from /nix/store/rmy663w9p7xb202rcln4jjzmvivznmz8-glibc-2.40-66/lib/libc.so.6
	NixOS#8  0x00007f10e7ea5dc9 in _int_free () from /nix/store/rmy663w9p7xb202rcln4jjzmvivznmz8-glibc-2.40-66/lib/libc.so.6
	NixOS#9  0x00007f10e7ea8613 in free () from /nix/store/rmy663w9p7xb202rcln4jjzmvivznmz8-glibc-2.40-66/lib/libc.so.6
	NixOS#10 0x00007f10e80ad3b5 in ZSTD_freeDCtx () from /nix/store/wy0slah6yvchgra8nhp6vgrqa6ay72cq-zstd-1.5.6/lib/libzstd.so.1
	NixOS#11 0x00007f10e8c90f6b in decompress_blob_zstd () from /nix/store/b2cfj7yk3wfg1jdwjzim7306hvsc5gnl-systemd-257.3/lib/libsystemd.so.0
	NixOS#12 0x00007f10e8bf0efe in journal_file_data_payload () from /nix/store/b2cfj7yk3wfg1jdwjzim7306hvsc5gnl-systemd-257.3/lib/libsystemd.so.0
	NixOS#13 0x00007f10e8c00f74 in sd_journal_enumerate_data () from /nix/store/b2cfj7yk3wfg1jdwjzim7306hvsc5gnl-systemd-257.3/lib/libsystemd.so.0
	NixOS#14 0x00000000004eae2f in in_systemd_collect ()
	NixOS#15 0x00000000004eb5a0 in in_systemd_collect_archive ()
	NixOS#16 0x000000000047aa18 in flb_input_collector_fd ()
	NixOS#17 0x0000000000495223 in flb_engine_start ()
	NixOS#18 0x000000000046f304 in flb_lib_worker ()
	NixOS#19 0x00007f10e7e972e3 in start_thread () from /nix/store/rmy663w9p7xb202rcln4jjzmvivznmz8-glibc-2.40-66/lib/libc.so.6
	NixOS#20 0x00007f10e7f1b2fc in __clone3 () from /nix/store/rmy663w9p7xb202rcln4jjzmvivznmz8-glibc-2.40-66/lib/libc.so.6

Reverts 7310ab3
Reverts 4fbc6cf

…392512)