Release build segfaults on quote request

[binarybaron]

When running the preview AppImage on linux (ubuntu 24), I get a segfault after requesting a quote from a provider.

: BlockTime { height: 2980178, timestamp: 1726934410 } }    
2024-09-21T16:00:10.622132731Z  INFO get_balance{balance=BalanceArgs { force_refresh: true } method="get_balance"}: Checked Bitcoin balance balance=0 BTC
2024-09-21T16:00:10.754434804Z DEBUG advancing offset within the current segment from 58009 to 58077    
2024-09-21T16:00:10.754861743Z DEBUG wrote lsns 58009-58076 to disk at offsets 58009-58076, maxed false complete_len 68    
2024-09-21T16:00:10.754886054Z DEBUG mark_interval(58009, 68)    
2024-09-21T16:00:10.754898005Z DEBUG new highest interval: 58009 - 58076    
2024-09-21T16:25:41.748385699Z  INFO buy_xmr{buy_xmr=BuyXmrArgs { seller: "/dns4/testnet.unstoppableswap.net/tcp/9839/p2p/12D3KooWGpVc1Bf9B7rTqP23BaLpWdJ9r6fdSU86TZ7GotuU1KYQ", bitcoin_change_address: None, monero_receive_address: Address { network: Stagenet, addr_type: SubAddress, public_spend: 22f6e4d45c86a8be2810e2fba7484c8d2c8be4f5d91f62cf28fccc36cf5252fa, public_view: ac7434fb2a7bc9672ef30704a8fef4cda5d20153fd41c6cf14a6a322e36cc4d3 } } method="buy_xmr"}: No --change-address supplied. Any change will be received to the internal wallet. internal_wallet_address=tb1q764n8zl2vxtl03p4d9m84k6lqrpyra7fpxyc3z
Segmentation fault (core dumped)

[binarybaron]

Output from rust-gdb with coredump file loaded:

rust-gdb target/release/swap
GNU gdb (Ubuntu 12.1-0ubuntu1~22.04.2) 12.1
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Reading symbols from target/release/swap...
(No debugging symbols found in target/release/swap)
(gdb) core-file /var/lib/apport/coredump/core._root_testing-releases_core_target_release_swap.0.03d0badd-fe53-4c34-8e99-98a4c09445e5.3621066.733291890 
[New LWP 3621066]
[New LWP 3621067]
[New LWP 3621068]
[New LWP 3621071]
[New LWP 3621073]
[New LWP 3621070]
[New LWP 3621072]
[New LWP 3621069]
[New LWP 3621076]
[New LWP 3621077]
[New LWP 3621075]
[New LWP 3621074]
[New LWP 3621078]
warning: Section `.reg-xstate/3621066' in core file too small.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `./target/release/swap list-sellers --rendezvous-point /dns4/discover.unstoppabl'.
Program terminated with signal SIGSEGV, Segmentation fault.
warning: Section `.reg-xstate/3621066' in core file too small.
#0  0x000055b91d1471c0 in _ZN4sha26sha5123x8627sha512_compress_x86_64_avx217hacb649f105d99b90E.llvm.15251769145856391368 ()
[Current thread is 1 (Thread 0x7fe431a0c480 (LWP 3621066))]
(gdb) bt
#0  0x000055b91d1471c0 in _ZN4sha26sha5123x8627sha512_compress_x86_64_avx217hacb649f105d99b90E.llvm.15251769145856391368 ()
#1  0x000055b91d147046 in sha2::sha512::Engine512::finish ()
#2  0x000055b91d1470ff in <sha2::sha512::Sha512 as digest::fixed::FixedOutputDirty>::finalize_into_dirty ()
#3  0x000055b91d109b3c in <ed25519_dalek::secret::ExpandedSecretKey as core::convert::From<&ed25519_dalek::secret::SecretKey>>::from ()
#4  0x000055b91d0c28eb in <libp2p_core::identity::ed25519::Keypair as core::convert::From<libp2p_core::identity::ed25519::SecretKey>>::from
    ()
#5  0x000055b91c6a8f48 in swap::seed::Seed::derive_libp2p_identity ()
#6  0x000055b91c2ccbdf in <tracing::instrument::Instrumented<T> as core::future::future::Future>::poll ()
#7  0x000055b91c369b59 in swap::cli::api::request::list_sellers::{{closure}} ()
#8  0x000055b91c3732ba in swap::cli::command::parse_args_and_apply_defaults::{{closure}} ()
#9  0x000055b91c38ebc5 in tokio::runtime::park::CachedParkThread::block_on ()
#10 0x000055b91c0010ff in tokio::runtime::context::runtime::enter_runtime ()
#11 0x000055b91c1e2f71 in swap::main ()
#12 0x000055b91c21b353 in std::sys_common::backtrace::__rust_begin_short_backtrace ()
#13 0x000055b91c1aa76d in std::rt::lang_start::{{closure}} ()
#14 0x000055b91d2cbe90 in std::rt::lang_start_internal ()
#15 0x000055b91c1e314c in main ()
(gdb) info registers
Missing register name
(gdb) disassemble
Dump of assembler code for function _ZN4sha26sha5123x8627sha512_compress_x86_64_avx217hacb649f105d99b90E.llvm.15251769145856391368:
   0x000055b91d147160 <+0>:	push   %rbp
   0x000055b91d147161 <+1>:	push   %r15
   0x000055b91d147163 <+3>:	push   %r14
   0x000055b91d147165 <+5>:	push   %r13
   0x000055b91d147167 <+7>:	push   %r12
   0x000055b91d147169 <+9>:	push   %rbx
   0x000055b91d14716a <+10>:	sub    $0x378,%rsp
   0x000055b91d147171 <+17>:	xor    %r11d,%r11d
   0x000055b91d147174 <+20>:	test   $0x1,%dl
   0x000055b91d147177 <+23>:	mov    %rsi,0x60(%rsp)
   0x000055b91d14717c <+28>:	mov    %rdi,0x58(%rsp)
   0x000055b91d147181 <+33>:	je     0x55b91d1475bf <_ZN4sha26sha5123x8627sha512_compress_x86_64_avx217hacb649f105d99b90E.llvm.15251769145856391368+1119>
   0x000055b91d147187 <+39>:	mov    %rdx,0x8(%rsp)
   0x000055b91d14718c <+44>:	mov    (%rdi),%rdx
   0x000055b91d14718f <+47>:	mov    0x8(%rdi),%r13
   0x000055b91d147193 <+51>:	mov    0x10(%rdi),%rbx
   0x000055b91d147197 <+55>:	mov    0x18(%rdi),%rcx
   0x000055b91d14719b <+59>:	mov    0x20(%rdi),%r10
   0x000055b91d14719f <+63>:	mov    0x28(%rdi),%rax
   0x000055b91d1471a3 <+67>:	vmovdqu (%rsi),%xmm0
   0x000055b91d1471a7 <+71>:	vmovdqa 0x426e81(%rip),%xmm7        # 0x55b91d56e030
   0x000055b91d1471af <+79>:	vpshufb %xmm7,%xmm0,%xmm2
   0x000055b91d1471b4 <+84>:	vpaddq 0x426e84(%rip),%xmm2,%xmm0        # 0x55b91d56e040
   0x000055b91d1471bc <+92>:	mov    0x30(%rdi),%r14
=> 0x000055b91d1471c0 <+96>:	vmovdqa %xmm0,0xf8(%rsp)
   0x000055b91d1471c9 <+105>:	vmovdqu 0x10(%rsi),%xmm0
   0x000055b91d1471ce <+110>:	vpshufb %xmm7,%xmm0,%xmm3
   0x000055b91d1471d3 <+115>:	vpaddq 0x426e75(%rip),%xmm3,%xmm0        # 0x55b91d56e050
   0x000055b91d1471db <+123>:	vmovdqa %xmm0,0x108(%rsp)
   0x000055b91d1471e4 <+132>:	vmovdqu 0x20(%rsi),%xmm0
   0x000055b91d1471e9 <+137>:	vpshufb %xmm7,%xmm0,%xmm0
   0x000055b91d1471ee <+142>:	vpaddq 0x426e6a(%rip),%xmm0,%xmm1        # 0x55b91d56e060
   0x000055b91d1471f6 <+150>:	vmovdqa %xmm1,0x118(%rsp)
   0x000055b91d1471ff <+159>:	vmovdqu 0x30(%rsi),%xmm1
   0x000055b91d147204 <+164>:	vpshufb %xmm7,%xmm1,%xmm1
   0x000055b91d147209 <+169>:	vpaddq 0x426e5f(%rip),%xmm1,%xmm5        # 0x55b91d56e070
   0x000055b91d147211 <+177>:	vmovdqu 0x40(%rsi),%xmm4
   0x000055b91d147216 <+182>:	vpshufb %xmm7,%xmm4,%xmm4

[binarybaron]

The segfault seems to be coming from a call to this by libp2p.

[binarybaron]

I believe this function is the culprit. There are unsafe calls as a result of this function.

swap/src/seed.rs

pub fn derive_libp2p_identity(&self) -> identity::Keypair {
        let bytes = self.derive(b"NETWORK").derive(b"LIBP2P_IDENTITY").bytes();
        let key = identity::ed25519::SecretKey::from_bytes(bytes).expect("we always pass 32 bytes");

        identity::Keypair::Ed25519(key.into())
    }

[binarybaron]

libp2p/rust-libp2p#5631

[binarybaron]

I'm assuming this is caused by some bug due to the mismatch in the old library (2 years old) and our new compiler version (1.79). I think we have a good shot at fixing this for now by:

1. Try to re-produce this by compiling upstream with 1.79
2. Downgrading to 1.74 rustc again. We'll have to replace the async trait function with a macro. Once we upgrade libp2p, we again upgrade to 1.79 / 1.80 again
3. We could also try upgrading the sha256 library but I'm unsure it that'll work as it'll likely be incompatible with our old libp2p version

@Einliterflasche Maybe you can try this? I don't have a linux machine to try this on

[Einliterflasche]

We cannot downgrade rustc to 1.74 because Tauri requires newer versions ([email protected] requires >=1.77.2 and [email protected] requires >=1.78). I just added the #[async_trait] attribute to swap::cli::api::Request] and it seems to work now (or at least, it doesn't immediatly segfault`):

[binarybaron]

New idea: use a different sha256 library

[Einliterflasche]

didn't work either. we'll have to complete the libp2p ugrade and until then release debug builds for our linux previews