Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Oleg Nesterov a69ac4a78d [PATCH] posix-timers: fix posix_cpu_timer_set() vs run_posix_cpu_timers() race ... This might be harmless, but looks like a race from code inspection (I was unable to trigger it). I must admit, I don't understand why we can't return TIMER_RETRY after 'spin_unlock(&p->sighand->siglock)' without doing bump_cpu_timer(), but this is what original code does. posix_cpu_timer_set: read_lock(&tasklist_lock); spin_lock(&p->sighand->siglock); list_del_init(&timer->it.cpu.entry); spin_unlock(&p->sighand->siglock); We are probaly deleting the timer from run_posix_cpu_timers's 'firing' local list_head while run_posix_cpu_timers() does list_for_each_safe. Various bad things can happen, for example we can just delete this timer so that list_for_each() will not notice it and run_posix_cpu_timers() will not reset '->firing' flag. In that case, .... if (timer->it.cpu.firing) { read_unlock(&tasklist_lock); timer->it.cpu.firing = -1; return TIMER_RETRY; } sys_timer_settime() goes to 'retry:', calls posix_cpu_timer_set() again, it returns TIMER_RETRY ... Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2005-10-24 08:13:14 -07:00
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irq	[PATCH] CHECK_IRQ_PER_CPU() to avoid dead code in __do_IRQ()	2005-09-07 16:57:29 -07:00
power	[PATCH] x86_64: Set up safe page tables during resume	2005-10-10 08:36:46 -07:00
acct.c	[PATCH] kernel/acct: add kerneldoc	2005-09-10 10:06:26 -07:00
audit.c	[PATCH] gfp flags annotations - part 1	2005-10-08 15:00:57 -07:00
auditsc.c	[AUDIT] Allow filtering on system call success _or_ failure	2005-08-27 10:25:43 +01:00
capability.c	[PATCH] kernel/capability.c: add kerneldoc	2005-07-27 16:26:06 -07:00
compat.c	[PATCH] kernel: fix-up schedule_timeout() usage	2005-09-10 10:06:37 -07:00
configs.c
cpu.c
cpuset.c	[PATCH] gfp flags annotations - part 1	2005-10-08 15:00:57 -07:00
crash_dump.c	[PATCH] kernel/crash_dump.c: add kerneldoc	2005-07-27 16:26:06 -07:00
dma.c
exec_domain.c
exit.c	[PATCH] posix-timers: remove false BUG_ON() from run_posix_cpu_timers()	2005-10-24 08:12:35 -07:00
extable.c
fork.c	[PATCH] Threads shouldn't inherit PF_NOFREEZE	2005-10-19 23:04:31 -07:00
futex.c	[PATCH] futex: remove duplicate code	2005-09-07 16:57:33 -07:00
intermodule.c	[PATCH] introduce and use kzalloc	2005-09-07 16:57:45 -07:00
itimer.c	[PATCH] itimer fixes	2005-07-27 16:25:51 -07:00
kallsyms.c
Kconfig.hz
Kconfig.preempt
kexec.c
kfifo.c	[PATCH] gfp flags annotations - part 1	2005-10-08 15:00:57 -07:00
kmod.c
kprobes.c	[PATCH] kprobes: fix bug when probed on task and isr functions	2005-09-07 16:58:01 -07:00
ksysfs.c
kthread.c
Makefile	[PATCH] spinlock consolidation	2005-09-10 10:06:21 -07:00
module.c	[PATCH] use add_taint() for setting tainted bit flags	2005-09-13 08:22:29 -07:00
panic.c	[PATCH] Call emergency_reboot from panic	2005-07-26 14:35:43 -07:00
params.c	[PATCH] Ignore trailing whitespace on kernel parameters correctly	2005-09-28 07:46:41 -07:00
pid.c
posix-cpu-timers.c	[PATCH] posix-timers: fix posix_cpu_timer_set() vs run_posix_cpu_timers() race	2005-10-24 08:13:14 -07:00
posix-timers.c	[PATCH] Call exit_itimers from do_exit, not __exit_signal	2005-10-21 15:38:08 -07:00
printk.c	[PATCH] Add printk_clock()	2005-09-21 10:11:54 -07:00
profile.c
ptrace.c	[PATCH] remove duplicated code from proc and ptrace	2005-09-07 16:57:43 -07:00
rcupdate.c	[PATCH] rcu: keep rcu callback event counter	2005-10-17 15:27:58 -07:00
resource.c	[PATCH] introduce and use kzalloc	2005-09-07 16:57:45 -07:00
sched.c	[PATCH] Fix spinlock owner debugging	2005-09-13 09:59:04 -07:00
seccomp.c
signal.c	[PATCH] Call exit_itimers from do_exit, not __exit_signal	2005-10-21 15:38:08 -07:00
softirq.c	[PATCH] x86-64: Some cleanup and optimization to the processor data area.	2005-09-12 10:49:58 -07:00
softlockup.c	[PATCH] detect soft lockups	2005-09-07 16:57:17 -07:00
spinlock.c	[PATCH] spinlock consolidation	2005-09-10 10:06:21 -07:00
stop_machine.c
sys.c	[PATCH] reboot: comment and factor the main reboot functions	2005-09-22 22:17:33 -07:00
sys_ni.c	[PATCH] remove sys_set_zone_reclaim()	2005-08-01 10:03:56 -07:00
sysctl.c	[NET]: Fix sparse warnings	2005-08-29 16:01:32 -07:00
time.c	[PATCH] Add missing export of getnstimeofday()	2005-10-14 17:10:12 -07:00
timer.c	[PATCH] schedule_timeout_[un]interruptible() speedup	2005-09-13 08:22:29 -07:00
uid16.c
user.c	[PATCH] inotify	2005-07-12 20:38:38 -07:00
wait.c
workqueue.c	[PATCH] introduce and use kzalloc	2005-09-07 16:57:45 -07:00