6.1-stable review patch. If anyone has any objections, please let me know.
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From: D. Wythe alibuda@linux.alibaba.com
[ Upstream commit aa96fbd6d78d9770323b21e2c92bd38821be8852 ]
Note that we always hold a reference to sock when attempting to submit close_work. Therefore, if we have successfully canceled close_work from pending, we MUST release that reference to avoid potential leaks.
Fixes: 42bfba9eaa33 ("net/smc: immediate termination for SMCD link groups") Signed-off-by: D. Wythe alibuda@linux.alibaba.com Reviewed-by: Dust Li dust.li@linux.alibaba.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- net/smc/smc_close.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/smc/smc_close.c b/net/smc/smc_close.c index 449ef454b53be..10219f55aad14 100644 --- a/net/smc/smc_close.c +++ b/net/smc/smc_close.c @@ -116,7 +116,8 @@ static void smc_close_cancel_work(struct smc_sock *smc) struct sock *sk = &smc->sk;
release_sock(sk); - cancel_work_sync(&smc->conn.close_work); + if (cancel_work_sync(&smc->conn.close_work)) + sock_put(sk); cancel_delayed_work_sync(&smc->conn.tx_work); lock_sock(sk); }