net,runtime: apparent deadlock in (*net.conn).Close and runtime.netpollblock on arm64 platforms #48925
Description
greplogs --dashboard -md -l -e '(?m).*\[semacquire, \d+ minutes\]:\n(.+\n\t.+\n)*net\.\(\*conn\)\.Close'
2021-10-08T16:26:20-99c1b24/windows-arm64-10
2021-10-05T15:58:05-f1f626d/linux-arm64-aws
2021-09-30T18:10:18-e81a3d9-205640e/linux-arm64-packet
2021-09-29T18:36:18-e48cf0d/android-arm64-corellium
2021-09-28T18:58:50-7d9f5e0-9c43872/windows-arm64-10
2021-09-28T17:19:08-1c6e50a/android-arm64-corellium
2021-09-27T22:22:04-52b23a5/android-arm64-corellium
2021-09-27T19:42:34-4e4d966-315cec2/linux-arm64-packet
2021-09-24T18:21:14-f6b5ffb/android-arm64-corellium
2021-09-22T20:53:48-41bb744/linux-arm64-packet
2021-09-18T06:04:41-c084706-c894b44/windows-arm64-10
2021-09-17T18:33:15-70493b3/ios-arm64-corellium
2021-09-16T23:13:58-e09dcc2/android-arm64-corellium
2021-09-09T21:28:56-c163c31-c981874/linux-arm64-aws
2021-09-07T23:27:08-3fff213/windows-arm64-10
2021-09-03T01:38:54-9f69a44/ios-arm64-corellium
2021-09-02T19:36:22-a8aa6cf/windows-arm64-10
2021-09-02T19:16:19-9633195/ios-arm64-corellium
2021-09-02T19:16:19-9633195/linux-arm64-packet
2021-09-02T16:59:57-2a463a2/android-arm64-corellium
2021-09-02T14:02:42-b8420ba/ios-arm64-corellium
2021-09-01T22:28:21-0bfd6fc/android-arm64-corellium
2021-08-28T04:46:13-0108177/windows-arm64-10
2021-08-24T15:55:38-60bc85c-d70c69d/windows-arm64-10
2021-08-23T12:26:30-c7e354d/linux-arm64-packet
2021-08-21T00:55:22-e17439e/windows-arm64-10
2021-08-17T15:00:04-3001b0a/windows-arm64-10
2021-08-05T20:22:31-fd45e26/android-arm64-corellium
2021-07-31T23:59:40-c6fcb2d-b8ca6e5/windows-arm64-10
2021-07-26T22:15:24-bfbb288/ios-arm64-corellium
2021-07-20T19:54:36-d568e6e/ios-arm64-corellium
2021-07-16T02:43:48-aa4e0f5/linux-arm64-aws
2021-06-30T01:29:49-c45e800/windows-arm64-10
2021-05-04T14:38:36-5e4f9b0/linux-arm64-aws
2021-05-03T16:23:09-7b768d4/linux-arm64-aws
2021-04-29T17:08:05-e03cca6/linux-arm64-aws
2021-04-29T11:37:05-c4c68fb/linux-arm64-aws
2021-04-22T17:47:59-537cde0/linux-arm64-aws
2021-04-16T16:36:57-2f0e5bf/linux-arm64-packet
2021-04-14T03:15:00-2d4ba26/linux-arm64-packet
2021-04-13T21:13:09-e512bc2/ios-arm64-corellium
2021-04-09T18:49:05-c3faff7/linux-arm64-aws
2021-04-09T18:49:05-c3faff7/linux-arm64-packet
2021-04-09T14:33:44-a690a5d/android-arm64-corellium
2021-04-08T18:47:17-96a6745/linux-arm64-packet
2021-03-29T21:50:16-4e1bf8e/linux-arm64-packet
2021-03-15T23:47:56-661f3f1/linux-arm64-aws
2021-03-12T21:52:25-5ea612d-f39c4de/linux-arm64-aws
2021-03-05T22:14:48-a829114/linux-arm64-aws
2021-01-25T22:54:28-e6b6d10/android-arm64-corellium
2020-12-16T16:40:57-5abda26/android-arm64-corellium
2020-12-10T23:11:25-1fe891a/ios-arm64-corellium
2020-10-15T18:07:26-3c9488e/linux-arm64-aws
2020-09-10T14:44:25-8098dbb/linux-arm64-aws