tools/docker/syzbot: use LLVM archive instead apt

[novitoll]

Replace clang, llvm apt packages in syzbot Dockerfile with the stable kernel version. Reduce Dockerfile code (less RUN layers).

Use stable LLVM version that Linux kernel doc suggests [1].

These 2 binaries are missing in the archive: "clang-format, clang-tidy", hence install them as the current apt package.

This patch increases syzbot docker image size by 230MB, see the comparison between "syz_master" (current master branch built image), and with the applied patch "syz_master_diff".

$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
syz_master_diff latest 40b209ef582e 6 hours ago 5.54GB
syz_master latest 292faad84de9 13 hours ago 5.31GB

The archive is 123M size and I've built the image 3 times with removing the images as the fresh install, and curl downloading for my 500Mbit/s Ethernet downlink took:

1st build: 0 hour 0 min 50 sec
2nd build: 1 hour 3 min 5 sec
3rd build: 0 hour 1 min 5 sec

Hereby, I'm concerned if the archive can be mirrored from "mirrors.edge.kernel.org" to more stable/reliable storage with more distributed CDN like dl.google.com, or it's something local with my downlink.

Per the 3rd build, the patch also speeds up (~1 min faster) the docker image build time:
...
Step 7/27 : RUN curl -L
---> Running in ae2853dfc0fc
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 123M 100 123M 0 0 1916k 0 0:01:05 0:01:05 --:--:-- 2513k
...
Successfully built 387ae7e06dfa
Successfully tagged syz_master_diff:latest

real    6m23.013s
user    0m0.145s
sys     0m0.094s

and the original "syz_master" fresh build:
...
Successfully built 843592c9ce1b
Successfully tagged syz_master:latest

real    7m18.333s
user    0m0.152s
sys     0m0.090s

Verified the binaries' versions in the container as well:

$ docker run --rm --name syz_master_diff -it syz_master_diff bash

/🤖 for e in {clang,clang++,clang-tidy,clang-format,ld.lld,llvm-nm,\
> llvm-ar,llvm-objcopy,llvm-objdump,llvm-addr2line,llvm-readelf,\
> llvm-strip}; do echo; $e --version; done

Debian clang version 15.0.6
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin

Debian clang version 15.0.6
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin

Debian LLVM version 15.0.6
  Optimized build.
  Default target: x86_64-pc-linux-gnu
  Host CPU: skylake

Debian clang-format version 15.0.6

ClangBuiltLinux LLD 15.0.7 (compatible with GNU linkers)

llvm-nm, compatible with GNU nm
LLVM (http://llvm.org/):
  LLVM version 15.0.7
  Optimized build.
  Default target: x86_64-unknown-linux-gnu
  Host CPU: skylake

LLVM (http://llvm.org/):
  LLVM version 15.0.7
  Optimized build.
  Default target: x86_64-unknown-linux-gnu
  Host CPU: skylake

llvm-objcopy, compatible with GNU objcopy
LLVM (http://llvm.org/):
  LLVM version 15.0.7
  Optimized build.
  Default target: x86_64-unknown-linux-gnu
  Host CPU: skylake

LLVM (http://llvm.org/):
  LLVM version 15.0.7
  Optimized build.
  Default target: x86_64-unknown-linux-gnu
  Host CPU: skylake

  Registered Targets:
    aarch64    - AArch64 (little endian)
    aarch64_32 - AArch64 (little endian ILP32)
    aarch64_be - AArch64 (big endian)
    arm        - ARM
    arm64      - ARM64 (little endian)
    arm64_32   - ARM64 (little endian ILP32)
    armeb      - ARM (big endian)
    bpf        - BPF (host endian)
    bpfeb      - BPF (big endian)
    bpfel      - BPF (little endian)
    hexagon    - Hexagon
    mips       - MIPS (32-bit big endian)
    mips64     - MIPS (64-bit big endian)
    mips64el   - MIPS (64-bit little endian)
    mipsel     - MIPS (32-bit little endian)
    ppc32      - PowerPC 32
    ppc32le    - PowerPC 32 LE
    ppc64      - PowerPC 64
    ppc64le    - PowerPC 64 LE
    riscv32    - 32-bit RISC-V
    riscv64    - 64-bit RISC-V
    systemz    - SystemZ
    thumb      - Thumb
    thumbeb    - Thumb (big endian)
    x86        - 32-bit X86: Pentium-Pro and above
    x86-64     - 64-bit X86: EM64T and AMD64

llvm-addr2line
LLVM (http://llvm.org/):
  LLVM version 15.0.7
  Optimized build.
  Default target: x86_64-unknown-linux-gnu
  Host CPU: skylake

LLVM (http://llvm.org/):
  LLVM version 15.0.7
  Optimized build.
  Default target: x86_64-unknown-linux-gnu
  Host CPU: skylake

llvm-strip, compatible with GNU strip
LLVM (http://llvm.org/):
  LLVM version 15.0.7
  Optimized build.
  Default target: x86_64-unknown-linux-gnu
  Host CPU: skylake

[1] https://mirrors.edge.kernel.org/pub/tools/llvm/

Fixes: #5385

[novitoll]

I've also uploaded the output of docker build here:
https://gist.github.com/novitoll/e6f271289f76e095586708b766474602

[ramosian-glider]

LGTM, but please fix the comments.

[ramosian-glider]

Ditto.

[novitoll]

Thanks! PTAL

@a-nogikh , @tarasmadan, @dvyukov , please review as well. As this should close #5375 PR.

[novitoll]

Following up