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Code Issues Releases Wiki Activity

xt_pknock: use do_div for long division

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This commit is contained in:
Andrew S. Johnson
2021-02-21 07:50:50 -07:00
committed by Jan Engelhardt
parent 5104269605
commit 3aa4ca3eaf
1 changed files with 5 additions and 2 deletions
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7
extensions/pknock/xt_pknock.c
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@@ -335,7 +335,8 @@ is_interknock_time_exceeded(const struct peer *peer, unsigned int max_time)
static inline bool
has_logged_during_this_minute(const struct peer *peer)
{
return peer != NULL && peer->login_sec / 60 == ktime_get_seconds() / 60;
unsigned long x = ktime_get_seconds(), y = peer->login_sec;
return peer != NULL && do_div(y, 60) == do_div(x, 60);
}
/**
@@ -709,6 +710,7 @@ has_secret(const unsigned char *secret, unsigned int secret_len, uint32_t ipsrc,
unsigned int hexa_size;
int ret;
bool fret = false;
unsigned long x;
unsigned int epoch_min;
if (payload_len == 0)
@@ -727,7 +729,8 @@ has_secret(const unsigned char *secret, unsigned int secret_len, uint32_t ipsrc,
hexresult = kzalloc(hexa_size, GFP_ATOMIC);
if (hexresult == NULL)
return false;
epoch_min = ktime_get_seconds() / 60;
x = ktime_get_seconds();
epoch_min = do_div(x, 60);
ret = crypto_shash_setkey(crypto.tfm, secret, secret_len);
if (ret != 0) {