Linus Torvalds 10b1fbdb0a Make sure "user->sigpending" count is in sync ... The previous commit (45c18b0bb5, aka "Fix unlikely (but possible) race condition on task->user access") fixed a potential oops due to __sigqueue_alloc() getting its "user" pointer out of sync with switch_user(), and accessing a user pointer that had been de-allocated on another CPU. It still left another (much less serious) problem, where a concurrent __sigqueue_alloc and swich_user could cause sigqueue_alloc to do signal pending reference counting for a _different_ user than the one it then actually ended up using. No oops, but we'd end up with the wrong signal accounting. Another case of Oleg's eagle-eyes picking up the problem. This is trivially fixed by just making sure we load whichever "user" structure we decide to use (it doesn't matter _which_ one we pick, we just need to pick one) just once. Acked-by: Oleg Nesterov <oleg@tv-sign.ru> Cc: Andrew Morton <akpm@osdl.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2006-11-04 13:03:00 -08:00
..
irq	[PATCH] genirq: clean up irq-flow-type naming	2006-10-17 08:18:45 -07:00
power	[PATCH] swsusp: debugging	2006-11-03 12:27:58 -08:00
time	[PATCH] time_adjust cleared before use	2006-10-28 11:30:55 -07:00
.gitignore
acct.c	[PATCH] csa: convert CONFIG tag for extended accounting routines	2006-10-01 00:39:29 -07:00
audit.c	[PATCH] kauditd_thread warning fix	2006-10-06 08:53:39 -07:00
audit.h
auditfilter.c	[PATCH] arch filter lists with < or > should not be accepted	2006-10-04 08:31:16 -04:00
auditsc.c	[PATCH] name_count array overrun	2006-10-04 08:31:21 -04:00
capability.c
compat.c	[PATCH] Create compat_sys_migrate_pages	2006-11-03 12:27:59 -08:00
configs.c
cpu.c	[PATCH] cpu-hotplug: release `workqueue_mutex' properly on CPU hot-remove	2006-10-28 11:30:55 -07:00
cpuset.c	[PATCH] cpuset ANSI prototype	2006-10-10 15:37:23 -07:00
delayacct.c
dma.c	[PATCH] kernel-doc for kernel/dma.c	2006-10-03 08:03:41 -07:00
exec_domain.c
exit.c	[PATCH] taskstats_tgid_free: fix usage	2006-10-28 11:30:54 -07:00
extable.c
fork.c	[PATCH] taskstats: kill ->taskstats_lock in favor of ->siglock	2006-10-28 11:30:54 -07:00
futex_compat.c	[PATCH] __user annotations: futex	2006-10-10 15:37:22 -07:00
futex.c	[PATCH] schedule removal of FUTEX_FD	2006-11-03 12:27:58 -08:00
hrtimer.c
itimer.c
kallsyms.c	[PATCH] Create kallsyms_lookup_size_offset()	2006-10-03 08:03:41 -07:00
Kconfig.hz
Kconfig.preempt
kexec.c
kfifo.c
kmod.c	[PATCH] introduce kernel_execve	2006-10-02 07:57:23 -07:00
kprobes.c	[PATCH] kretprobe spinlock deadlock patch	2006-10-02 07:57:16 -07:00
ksysfs.c
kthread.c
latency.c
lockdep_internals.h
lockdep_proc.c
lockdep.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2006-10-17 08:56:43 -07:00
Makefile	[PATCH] srcu-3: RCU variant permitting read-side blocking	2006-10-04 07:55:30 -07:00
module.c	[PATCH] ndiswrapper: don't set the module->taints flags	2006-10-30 12:08:40 -08:00
mutex-debug.c	Lockdep: add lockdep_set_class_and_subclass() and lockdep_set_subclass()	2006-10-11 01:45:14 -04:00
mutex-debug.h
mutex.c
mutex.h
nsproxy.c	[PATCH] kernel/nsproxy.c: use kmemdup()	2006-10-20 10:26:44 -07:00
panic.c
params.c
pid.c	[PATCH] introduce get_task_pid() to fix unsafe get_pid()	2006-10-02 07:57:25 -07:00
posix-cpu-timers.c	[PATCH] posix-cpu-timers: prevent signal delivery starvation	2006-10-17 08:18:43 -07:00
posix-timers.c	fix file specification in comments	2006-10-03 23:01:26 +02:00
printk.c	[PATCH] Add printk_timed_ratelimit()	2006-11-03 12:27:58 -08:00
profile.c	[PATCH] bitmap: parse input from kernel and user buffers	2006-10-11 11:14:22 -07:00
ptrace.c
rcupdate.c	[PATCH] rcu: simplify/improve batch tuning	2006-10-04 07:55:31 -07:00
rcutorture.c	[PATCH] rcu: add sched torture type to rcutorture	2006-10-04 07:55:31 -07:00
relay.c	[PATCH] make kernel/relay.c __user-clean	2006-10-10 15:37:22 -07:00
resource.c	[PATCH] kernel-doc for kernel/resource.c	2006-10-03 08:03:41 -07:00
rtmutex_common.h
rtmutex-debug.c	Remove all inclusions of <linux/config.h>	2006-10-04 03:38:54 -04:00
rtmutex-debug.h
rtmutex-tester.c	Remove all inclusions of <linux/config.h>	2006-10-04 03:38:54 -04:00
rtmutex.c
rtmutex.h
rwsem.c
sched.c	[PATCH] readjust comments of task_timeslice for kernel doc	2006-10-20 10:26:37 -07:00
seccomp.c
signal.c	Make sure "user->sigpending" count is in sync	2006-11-04 13:03:00 -08:00
softirq.c
softlockup.c
spinlock.c
srcu.c	[PATCH] SRCU: report out-of-memory errors	2006-10-04 07:55:30 -07:00
stacktrace.c
stop_machine.c
sys_ni.c	[PATCH] Create compat_sys_migrate_pages	2006-11-03 12:27:59 -08:00
sys.c	[PATCH] SRCU: report out-of-memory errors	2006-10-04 07:55:30 -07:00
sysctl.c	[PATCH] cad_pid sysctl with PROC_FS=n	2006-10-20 10:26:38 -07:00
taskstats.c	[PATCH] taskstats: fix sub-threads accounting	2006-10-31 08:07:00 -08:00
time.c
timer.c	[PATCH] kill wall_jiffies	2006-10-01 00:39:27 -07:00
tsacct.c	[PATCH] xacct_add_tsk: fix pure theoretical ->mm use-after-free	2006-10-30 12:08:41 -08:00
uid16.c
unwind.c	[PATCH] x86-64: Speed up dwarf2 unwinder	2006-10-21 18:37:01 +02:00
user.c	Fix unlikely (but possible) race condition on task->user access	2006-11-04 10:06:02 -08:00
utsname.c	[PATCH] namespaces: utsname: implement CLONE_NEWUTS flag	2006-10-02 07:57:22 -07:00
wait.c
workqueue.c	[PATCH] workqueue: update kerneldoc	2006-10-28 11:30:55 -07:00