Public bug reported:
Binary package hint: linux-source-2.6.12
In kernel/posix-cpu-timers.c check_process_timers, never kernels have a small
fix that is missing from the 2.6.12 kernel.
Without the fix the kernel crashes.
This is part of the diff between 2.6.12-10 and a 2.6.15
with the two places which might get "divide error".
The second one is the one that have hit us multiple times the past weeks.
@@ -492,6 +486,9 @@ static void process_timer_rebalance(stru
struct task_struct *t = p;
unsigned int nthreads = atomic_read(&p->signal->live);
+ if (!nthreads)
+ return;
+
switch (clock_idx) {
default:
BUG();
@@ -1158,6 +1165,9 @@ static void check_process_timers(struct
unsigned long long sched_left, sched;
const unsigned int nthreads = atomic_read(&sig->live);
+ if (!nthreads)
+ return;
+
prof_left = cputime_sub(prof_expires, utime);
prof_left = cputime_sub(prof_left, stime);
prof_left = cputime_div(prof_left, nthreads);
** Affects: linux-source-2.6.12 (Ubuntu)
Importance: Undecided
Status: Unconfirmed
--
Kernel crash in check_process_timers, divide error
https://launchpad.net/bugs/82818
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