net: only delete CConnman if it's been created #8715
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Concept ACK, but wouldn't it be easier to invoke |
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As discussed on IRC, yes. This is over-engineered as-is, for future threading scenarios that may not ever happen. I'll make that change. |
In the case of (for example) an already-running bitcoind, the shutdown sequence begins before CConnman has been created, leading to a null-pointer dereference when g_connman->Stop() is called. Instead, Just let the CConnman dtor take care of stopping.
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Replaced with the simpler version. |
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utACK 36fa01f |
laanwj
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Sep 14, 2016
36fa01f net: only delete CConnman if it's been created (Cory Fields)
random-zebra
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Aug 27, 2020
e733939 [Cleanup] Remove CConnman::Copy(Release)NodeVector, now unused (random-zebra) b09da57 [Refactor] Proper CConnman encapsulation of mnsync (random-zebra) 219061e [Refactor] Decouple SyncWithNode from CMasternodeSync::Process() (random-zebra) e1f3620 [Refactor] Proper CConnman encapsulation of proposals / votes sync (random-zebra) f38c9f9 miner: don't try to access connman if it doesn't exist (Fuzzbawls) 92ab619 Address feedback (Fuzzbawls) 9d5346a Do not set an addr time penalty when a peer advertises itself. (Gregory Maxwell) fe12ff9 net: No longer send local address in addrMe (Wladimir J. van der Laan) 14d6917 net: misc header cleanups (Cory Fields) 34ba0de net: make proxy receives interruptible (Cory Fields) 1bd97ef net: make net processing interruptable (Fuzzbawls) e24b4cc net: make net interruptible (Cory Fields) 814d0de net: add CThreadInterrupt and InterruptibleSleep (Cory Fields) 1443f2a net: a few small cleanups before replacing boost threads (Cory Fields) 58eabe4 net: move MAX_FEELER_CONNECTIONS into connman (Cory Fields) 874baba Convert ForEachNode* functions to take a templated function argument rather than a std::function to eliminate std::function overhead (Jeremy Rubin) 9485ab0 Made the ForEachNode* functions in src/net.cpp more pragmatic and self documenting (Jeremy Rubin) c1e59ad minor net cleanups (Fuzzbawls) 07ae004 net: move vNodesDisconnected into CConnman (Cory Fields) 276c946 net: add nSendBufferMaxSize/nReceiveFloodSize to CConnection::Options (Cory Fields) 22a9aff net: Introduce CConnection::Options to avoid passing so many params (Cory Fields) e4891bf net: Drop StartNode/StopNode and use CConnman directly (Cory Fields) 431575c net: pass CClientUIInterface into CConnman (Cory Fields) 48de47e net: Pass best block known height into CConnman (Cory Fields) 15eed91 net: move max/max-outbound to CConnman (Cory Fields) 2bf0921 net: move semOutbound to CConnman (Cory Fields) 481929f net: move nLocalServices/nRelevantServices to CConnman (Cory Fields) bcee6ae net: move SendBufferSize/ReceiveFloodSize to CConnman (Cory Fields) 6865469 net: move send/recv statistics to CConnman (Cory Fields) 1cec418 net: SocketSendData returns written size (Cory Fields) 2bb9dfa net: move messageHandlerCondition to CConnman (Cory Fields) 9c5a0df net: move nLocalHostNonce to CConnman (Cory Fields) a1394ef net: move nLastNodeId to CConnman (Cory Fields) 3804c29 net: move whitelist functions into CConnman (Cory Fields) dbde9be net: create generic functor accessors and move vNodes to CConnman (Cory Fields) 2e02467 net: Add most functions needed for vNodes to CConnman (Cory Fields) 5667e61 net: move added node functions to CConnman (Cory Fields) 37487ed net: Add oneshot functions to CConnman (Cory Fields) facf878 net: move ban and addrman functions into CConnman (Cory Fields) 091aaf2 net: handle nodesignals in CConnman (Cory Fields) 1e9fa0f net: move OpenNetworkConnection into CConnman (Cory Fields) 573200f net: Move socket binding into CConnman (Cory Fields) 7762b97 net: Pass CConnection to wallet rather than using the global (Fuzzbawls) 00591b8 net: Pass CConnman around as needed (Cory Fields) 2cd3d39 net: Add rpc error for missing/disabled p2p functionality (Cory Fields) f08e316 net: Create CConnman to encapsulate p2p connections (Cory Fields) 66337dc net: move CBanDB and CAddrDB out of net.h/cpp (Fuzzbawls) 10969f6 gui: add NodeID to the peer table (Cory Fields) 58044ac Fix some locks (Pieter Wuille) f9f8926 Do not shadow variables in networking code (Pavel Janík) Pull request description: This is the finalization of the upstream PRs being tracked in #1374 to update much of our networking code to more closely follow upstream improvements. The following PRs are included here: - bitcoin#8466 Do not shadow variables in networking code - bitcoin#8606 Fix some locks - bitcoin#8085 Begin encapsulation - bitcoin#9289 drop boost::thread_group - bitcoin#8740 No longer send local address in addrMe - bitcoin#8661 Do not set an addr time penalty when a peer advertises itself Additionally, during conflict resolution and backporting of 8085, the following additional upstream PR was included: - bitcoin#8715 only delete CConnman if it's been created Still TODO in future PRs: - bitcoin#9037 - bitcoin#9441 - bitcoin#9609 - bitcoin#9626 - bitcoin#9708 - bitcoin#12381 - bitcoin#18584 ACKs for top commit: furszy: same here, code ACK e733939. Nice work ☕ . furszy: ACK e733939 . random-zebra: ACK e733939 and merging... Tree-SHA512: 0fc3cca76d9ddc13f75fc9d48c48d215e6c0e0381377c0318436176a0e0ead73b511e0061a4b63f7052874730b6da8b0ffc2c94cba034bcc39aad4212b69ee22
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This fixes a possible shutdown crash. Thanks to @morcos for reporting.
In the case of (for example) an already-running bitcoind, the shutdown sequence begins before CConnman has been created, leading to a null-pointer dereference when g_connman->Stop() is called.