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authorGhanan Gowripalan <ghanan@google.com>2020-03-02 13:14:12 -0800
committergVisor bot <gvisor-bot@google.com>2020-03-02 13:16:10 -0800
commit8821a7104f8c8f263b88def1a646d518ec3f5dd2 (patch)
tree7fd36ac38615c8229ad6ca7b5e3f20f56c5619c6 /pkg/tcpip/transport/raw
parentf03e19d575f644aa394cd86a504148404d748f9f (diff)
Do not read-lock NIC recursively
A deadlock may occur if a write lock on a RWMutex is blocked between nested read lock attempts as the inner read lock attempt will be blocked in this scenario. Example (T1 and T2 are differnt goroutines): T1: obtain read-lock T2: attempt write-lock (blocks) T1: attempt inner/nested read-lock (blocks) Here we can see that T1 and T2 are deadlocked. Tests: Existing tests pass. PiperOrigin-RevId: 298426678
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