f01b1b0baa
As Steven Rostedt pointed out, there are 2 problems with ITIMER_REAL timers. 1. do_setitimer() does not call del_timer_sync() in case when the timer is not pending (it_real_value() returns 0). This is wrong, the timer may still be running, and it can rearm itself. 2. It calls del_timer_sync() with tsk->sighand->siglock held. This is deadlockable, because timer's handler needs this lock too. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Acked-by: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
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.. | ||
irq | ||
power | ||
acct.c | ||
audit.c | ||
auditsc.c | ||
capability.c | ||
compat.c | ||
configs.c | ||
cpu.c | ||
cpuset.c | ||
crash_dump.c | ||
dma.c | ||
exec_domain.c | ||
exit.c | ||
extable.c | ||
fork.c | ||
futex.c | ||
intermodule.c | ||
itimer.c | ||
kallsyms.c | ||
Kconfig.hz | ||
Kconfig.preempt | ||
kexec.c | ||
kfifo.c | ||
kmod.c | ||
kprobes.c | ||
ksysfs.c | ||
kthread.c | ||
Makefile | ||
module.c | ||
panic.c | ||
params.c | ||
pid.c | ||
posix-cpu-timers.c | ||
posix-timers.c | ||
printk.c | ||
profile.c | ||
ptrace.c | ||
rcupdate.c | ||
resource.c | ||
sched.c | ||
seccomp.c | ||
signal.c | ||
softirq.c | ||
spinlock.c | ||
stop_machine.c | ||
sys_ni.c | ||
sys.c | ||
sysctl.c | ||
time.c | ||
timer.c | ||
uid16.c | ||
user.c | ||
wait.c | ||
workqueue.c |