Messages in this thread | | | From | Andreas Schwab <> | Subject | Re: [PATCH net-next] net/smc: cast sizeof to int for comparison | Date | Sat, 15 Sep 2018 13:35:32 +0200 |
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On Sep 15 2018, YueHaibing <yuehaibing@huawei.com> wrote:
> 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> > --- > net/smc/smc_clc.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c > index 83aba9a..fd0f5ce 100644 > --- a/net/smc/smc_clc.c > +++ b/net/smc/smc_clc.c > @@ -446,7 +446,7 @@ 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 < (int)sizeof(pclc)) { > if (len >= 0) { > reason_code = -ENETUNREACH; > smc->sk.sk_err = -reason_code;
It would perhaps be better to handle len < 0 first.
Andreas.
-- Andreas Schwab, schwab@linux-m68k.org GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1 "And now for something completely different."
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