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[WATCHDOG] ib700wdt.c - fix buffer_underflow bug

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This fixes Bug 11399:
if ibwdt_set_heartbeat(int t) is called with value 30 then
the check "if ((t < 0) || (t > 30))" in ibwdt_set_heartbeat
is not going to fail because t == 30, but in the loop, the
check wd_times[i] > t is never going to be true because
none of the wd_times are greater than the value of t (i.e. 30).
So we are exiting the loop with i == -1 and therefore setting
wd_margin to -1 which is wrong.

Reported-by: Zvonimir Rakamaric <zrakamar@cs.ubc.ca>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Wim Van Sebroeck 2008-10-15 08:53:06 +00:00
parent 278429cff8
commit 7c2500f17d
1 changed files with 1 additions and 1 deletions
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drivers/watchdog/ib700wdt.c
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@ -154,7 +154,7 @@ static int ibwdt_set_heartbeat(int t)
return -EINVAL;
for (i = 0x0F; i > -1; i--)
if (wd_times[i] > t)
if (wd_times[i] >= t)
break;
wd_margin = i;
return 0;