Messages in this thread Patch in this message | | | From | Ursula Braun <> | Subject | [PATCH net 5/5] net/smc: fix sizeof to int comparison | Date | Tue, 18 Sep 2018 15:46:38 +0200 |
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From: YueHaibing <yuehaibing@huawei.com>
Comparing an int to a size, which is unsigned, causes the int to become unsigned, giving the wrong result. kernel_sendmsg can return a negative error code.
Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> --- net/smc/smc_clc.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c index 83aba9ade060..52241d679cc9 100644 --- a/net/smc/smc_clc.c +++ b/net/smc/smc_clc.c @@ -446,14 +446,12 @@ int smc_clc_send_proposal(struct smc_sock *smc, int smc_type, vec[i++].iov_len = sizeof(trl); /* due to the few bytes needed for clc-handshake this cannot block */ len = kernel_sendmsg(smc->clcsock, &msg, vec, i, plen); - if (len < sizeof(pclc)) { - if (len >= 0) { - reason_code = -ENETUNREACH; - smc->sk.sk_err = -reason_code; - } else { - smc->sk.sk_err = smc->clcsock->sk->sk_err; - reason_code = -smc->sk.sk_err; - } + if (len < 0) { + smc->sk.sk_err = smc->clcsock->sk->sk_err; + reason_code = -smc->sk.sk_err; + } else if (len < (int)sizeof(pclc)) { + reason_code = -ENETUNREACH; + smc->sk.sk_err = -reason_code; } return reason_code; -- 2.16.4
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