| commit | d4c1ad882973e407ff85b977f4ce5b9435451190 | [log] [tgz] |
|---|---|---|
| author | Tzu-Chiao Yeh <su3g4284zo6y7@gmail.com> | Mon Aug 24 22:04:17 2020 +0800 |
| committer | Emmanuel Odeke <emmanuel@orijtech.com> | Wed Oct 28 16:55:17 2020 +0000 |
| tree | f3681fb1fdb68a84f0ca3e3567f69055a61da0bb | |
| parent | 421d4e72de802ed65cb38317660654771cfb13e9 [diff] |
database/sql: fix tx stmt deadlock when rollback Tx acquires tx.closemu W-lock and then acquires stmt.closemu.W-lock to fully close the transaction and associated prepared statement. Stmt query and execution run in reverse ways - acquires stmt.closemu.R-lock and then acquires tx.closemu.R-lock to grab tx connection, which may cause deadlock. Prevent the lock is held around tx.closePrepared to ensure no deadlock happens. Fixes #40985 Change-Id: If53909822b87bce11861a6e3035ecb9476d2cd17 Reviewed-on: https://go-review.googlesource.com/c/go/+/250178 Run-TryBot: Emmanuel Odeke <emmanuel@orijtech.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Daniel Theophanes <kardianos@gmail.com> Trust: Emmanuel Odeke <emmanuel@orijtech.com>
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