BugCheck in CxPlatSocketSendInternal (epoll)

[nibanks]

Describe the bug

Seen in a recent CI run:

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 quicinterop.5816.1659662245.core
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[Current thread is 1 (Thread 0x7f25f6ffe700 (LWP 5824))]
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#1  0x00007f2607cc6859 in __GI_abort () at abort.c:79
#2  0x00007f260819159c in quic_bugcheck (File=0x7f26083485d8 "/home/vsts/work/1/s/src/platform/datapath_epoll.c", Line=2525, Expr=0x7f26083488e0 "pthread_mutex_lock(&(&SocketContext->PendingSendDataLock)->Mutex) == 0") at /home/vsts/work/1/s/src/platform/platform_posix.c:78
#3  0x00007f2608198074 in CxPlatSocketSendInternal (Socket=0x7f2535da5410, LocalAddress=0x7f2514093c44, RemoteAddress=0x7f2514093c28, SendData=<optimized out>, IsPendedSend=<optimized out>) at /home/vsts/work/1/s/src/platform/datapath_epoll.c:2525
#4  0x00007f260819869d in CxPlatSocketSend (Socket=<optimized out>, Route=<optimized out>, SendData=<optimized out>, IdealProcessor=<optimized out>) at /home/vsts/work/1/s/src/platform/datapath_epoll.c:2710
#5  0x00007f260814f8f1 in QuicBindingSend (Binding=0x7f2535da4a50, Route=<optimized out>, SendData=<optimized out>, BytesToSend=39, DatagramsToSend=DatagramsToSend@entry=1, IdealProcessor=<optimized out>) at /home/vsts/work/1/s/src/core/binding.c:1830
#6  0x00007f260818e4d5 in QuicPacketBuilderSendBatch (Builder=Builder@entry=0x7f25f6ffd720) at /home/vsts/work/1/s/src/core/packet_builder.c:1017
#7  0x00007f260818eb43 in QuicPacketBuilderFinalize (Builder=Builder@entry=0x7f25f6ffd720, FlushBatchedDatagrams=FlushBatchedDatagrams@entry=1 '\001') at /home/vsts/work/1/s/src/core/packet_builder.c:968
#8  0x00007f2608187054 in QuicSendPathChallenges (Send=Send@entry=0x7f2514094520) at /home/vsts/work/1/s/src/core/send.c:1049
#9  0x00007f2608187283 in QuicSendFlush (Send=Send@entry=0x7f2514094520) at /home/vsts/work/1/s/src/core/send.c:1139
#10 0x00007f2608163dd4 in QuicConnDrainOperations (Connection=Connection@entry=0x7f2514093a50) at /home/vsts/work/1/s/src/core/connection.c:7356
#11 0x00007f26081477b4 in QuicWorkerProcessConnection (Worker=Worker@entry=0x5562ee86a3c0, Connection=0x7f2514093a50, ThreadID=ThreadID@entry=5824, TimeNow=TimeNow@entry=0x7f25f6ffde98) at /home/vsts/work/1/s/src/core/worker.c:510
#12 0x00007f2608147e00 in QuicWorkerLoop (Context=Context@entry=0x5562ee86a3c0, TimeNow=TimeNow@entry=0x7f25f6ffde98, ThreadID=ThreadID@entry=5824) at /home/vsts/work/1/s/src/core/worker.c:668
#13 0x00007f2608148106 in QuicWorkerThread (Context=0x5562ee86a3c0) at /home/vsts/work/1/s/src/core/worker.c:733
#14 0x00007f2607e9e609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#15 0x00007f2607dc3133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
bash: line 1:  5816 Aborted                 (core dumped) LSAN_OPTIONS=report_objects=1 ASAN_OPTIONS=disable_coredump=0:abort_on_error=1 UBSAN_OPTIONS=halt_on_error=1:print_stacktrace=1 /home/vsts/work/1/s/artifacts/bin/linux/x64_Release_openssl/quicinterop

Affected OS

• [ ] All
• [ ] Windows Server 2022
• [ ] Windows 11, version 22H2
• [ ] Windows 11, version 21H2
• [ ] Windows Insider Preview (specify affected build below)
• [X] Ubuntu
• [ ] Debian
• [ ] Other (specify below)

Additional OS information

No response

MsQuic version

main

Steps taken to reproduce bug

Run quicinterop on Ubuntu.

Expected behavior

It runs to completion.

Actual outcome

It crashed.

Additional details

Dump: https://dev.azure.com/ms/_apis/resources/Containers/17853475/logs?itemPath=logs%2Flinux%2Fx64_Release_openssl%2Fquicinterop%2F08.05.2022.01.17.15%2Fquicinterop.5816.1659662245.core (14 GB)

[wujin1989]

Hihi, has this issue been resolved?

[nibanks]

Not that I know of.