diff options
| author | Fan Du <fdu@windriver.com> | 2012-07-30 21:43:54 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-08-02 00:19:17 -0700 |
| commit | e3c0d04750751389d5116267f8cf4687444d9a50 (patch) | |
| tree | dfa831b0d4fc388da81ccc0f8f3ce4f62c3916f4 /net/xfrm/xfrm_state.c | |
| parent | 1485348d2424e1131ea42efc033cbd9366462b01 (diff) | |
Fix unexpected SA hard expiration after changing date
After SA is setup, one timer is armed to detect soft/hard expiration,
however the timer handler uses xtime to do the math. This makes hard
expiration occurs first before soft expiration after setting new date
with big interval. As a result new child SA is deleted before rekeying
the new one.
Signed-off-by: Fan Du <fdu@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/xfrm/xfrm_state.c')
| -rw-r--r-- | net/xfrm/xfrm_state.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index 5b228f97d4b3..87cd0e4d4282 100644 --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -415,8 +415,17 @@ static enum hrtimer_restart xfrm_timer_handler(struct hrtimer * me) if (x->lft.hard_add_expires_seconds) { long tmo = x->lft.hard_add_expires_seconds + x->curlft.add_time - now; - if (tmo <= 0) - goto expired; + if (tmo <= 0) { + if (x->xflags & XFRM_SOFT_EXPIRE) { + /* enter hard expire without soft expire first?! + * setting a new date could trigger this. + * workarbound: fix x->curflt.add_time by below: + */ + x->curlft.add_time = now - x->saved_tmo - 1; + tmo = x->lft.hard_add_expires_seconds - x->saved_tmo; + } else + goto expired; + } if (tmo < next) next = tmo; } @@ -433,10 +442,14 @@ static enum hrtimer_restart xfrm_timer_handler(struct hrtimer * me) if (x->lft.soft_add_expires_seconds) { long tmo = x->lft.soft_add_expires_seconds + x->curlft.add_time - now; - if (tmo <= 0) + if (tmo <= 0) { warn = 1; - else if (tmo < next) + x->xflags &= ~XFRM_SOFT_EXPIRE; + } else if (tmo < next) { next = tmo; + x->xflags |= XFRM_SOFT_EXPIRE; + x->saved_tmo = tmo; + } } if (x->lft.soft_use_expires_seconds) { long tmo = x->lft.soft_use_expires_seconds + |