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[rdma] occasional crash in butil::IOBuf::clear() #3252
Description
Describe the bug
Spotted from log, as shown below:
PC: @ Ox0(unknown)
*** SIGSEGV（@0x4) received by PID 7（TID Ox7f45f57bd6c0) from PID 4; stack trace: ***
0x561a2f021526 google::Canonymousnamespace)::FailureSignaLHandler()
0x7f45f8254050 （unknown)
0x561a2ef11e9f butil::IOBuf::clear()
0x561aZed92a2e brpc::rdma::RdmaEndpoint::HandleCompletion()
0x561a2ed92f33 brpc::rdma::RdmaEndpoint::PollCq()
0x561a2ed56290 brpc::Socket::ProcessEvent()
0x561a2eecffcf bthread::TaskGroup::task_runner()
0x561a2eeea901 bthread_make_fcontextIn theory, we have ref-counting in Socket::Address() that protects racing against _sq_sent between WaitAndReset() and RdmaEndpoint::PollCq(), but ... @yanglimingcn @chenBright Any clue?
To Reproduce
unknown
Expected behavior
No crash.
Versions
OS: Debian 12
Compiler: g++ (Debian 14.2.0-19) 14.2.0
brpc: 1.14
protobuf:
Additional context/screenshots
n/a
Activity
chenBright commentedon Mar 31, 2026
I haven't encountered this problem.
live4thee commentedon Apr 3, 2026
The mystery has been revealed with the help of AI ... Patch in progress.
live4thee commentedon Apr 8, 2026
@chenBright See PR 3261 above. CC @yanglimingcn