Oleg Nesterov 7001510d0c [PATCH] copy_process: cleanup bad_fork_cleanup_sighand ...

The only caller of exit_sighand(tsk) is copy_process's error path.  We can
call __exit_sighand() directly and kill exit_sighand().

This 'tsk' was not yet registered in pid_hash[] or init_task.tasks, it has no
external references, nobody can see it, and

	IF (clone_flags & CLONE_SIGHAND)
		At least 'current' has a reference to ->sighand, this
		means atomic_dec_and_test(sighand->count) can't be true.

	ELSE
		Nobody can see this ->sighand, this means we can free it
		without any locking.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: "Paul E. McKenney" <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2006-03-28 18:36:42 -08:00

..

irq

[PATCH] warn if free_irq() is called from IRQ context

2006-03-26 08:56:53 -08:00

power

[PATCH] swswsup: return correct load_image error

2006-03-26 08:56:55 -08:00

.gitignore

…

acct.c

[PATCH] move capable() to capability.h

2006-01-11 18:42:13 -08:00

audit.c

[PATCH] fix audit_init failure path

2006-03-20 14:08:55 -05:00

audit.h

[PATCH] sem2mutex: audit_netlink_sem

2006-03-20 14:08:55 -05:00

auditfilter.c

[PATCH] sem2mutex: audit_netlink_sem

2006-03-20 14:08:55 -05:00

auditsc.c

Merge branch 'audit.b3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current

2006-03-25 09:24:53 -08:00

capability.c

[PATCH] refactor capable() to one implementation, add __capable() helper

2006-03-25 08:22:56 -08:00

compat.c

[PATCH] lightweight robust futexes: compat

2006-03-27 08:44:49 -08:00

configs.c

…

cpu.c

[PATCH] Notifier chain update: API changes

2006-03-27 08:44:50 -08:00

cpuset.c

[PATCH] cpuset: remove useless local variable initialization

2006-03-24 07:33:24 -08:00

dma.c

…

exec_domain.c

[PATCH] Fix module refcount leak in __set_personality()

2006-03-24 07:33:30 -08:00

exit.c

[PATCH] release_task: replace open-coded ptrace_unlink()

2006-03-28 18:36:41 -08:00

extable.c

…

fork.c

[PATCH] copy_process: cleanup bad_fork_cleanup_sighand

2006-03-28 18:36:42 -08:00

futex_compat.c

[PATCH] compat_sys_futex() warning fix

2006-03-28 09:16:09 -08:00

futex.c

[PATCH] lightweight robust futexes updates

2006-03-27 08:44:49 -08:00

hrtimer.c

[PATCH] hrtimers: remove data field

2006-03-26 08:57:03 -08:00

intermodule.c

[PATCH] missing license tag in intermodule

2006-02-05 11:06:52 -08:00

itimer.c

[PATCH] hrtimers: remove data field

2006-03-26 08:57:03 -08:00

kallsyms.c

…

Kconfig.hz

…

Kconfig.preempt

…

kexec.c

[PATCH] move capable() to capability.h

2006-01-11 18:42:13 -08:00

kfifo.c

…

kmod.c

[PATCH] wait_for_helper: trivial style cleanup

2006-03-28 18:36:41 -08:00

kprobes.c

[PATCH] kretprobe instance recycled by parent process

2006-03-26 08:57:04 -08:00

ksysfs.c

[PATCH] fix build error if CONFIG_SYSFS=n

2006-03-24 07:33:31 -08:00

kthread.c

[PATCH] find_task_by_pid() needs tasklist_lock

2006-03-25 08:22:57 -08:00

Makefile

[PATCH] lightweight robust futexes: compat

2006-03-27 08:44:49 -08:00

module.c

[PATCH] symversion warning fix

2006-03-28 09:16:02 -08:00

mutex-debug.c

…

mutex-debug.h

…

mutex.c

…

mutex.h

…

panic.c

[PATCH] Notifier chain update: API changes

2006-03-27 08:44:50 -08:00

params.c

[PATCH] Change dash2underscore() return value to char

2006-03-28 09:16:03 -08:00

pid.c

[PATCH] pidhash: don't count idle threads

2006-03-28 18:36:41 -08:00

posix-cpu-timers.c

…

posix-timers.c

[PATCH] hrtimers: remove data field

2006-03-26 08:57:03 -08:00

printk.c

[PATCH] console_setup() depends (wrongly?) on CONFIG_PRINTK

2006-03-24 07:33:27 -08:00

profile.c

[PATCH] Notifier chain update: API changes

2006-03-27 08:44:50 -08:00

ptrace.c

[PATCH] don't use REMOVE_LINKS/SET_LINKS for reparenting

2006-03-28 18:36:41 -08:00

rcupdate.c

[PATCH] rcu_process_callbacks: don't cli() while testing ->nxtlist

2006-03-24 07:33:20 -08:00

rcutorture.c

[PATCH] for_each_possible_cpu: fixes for generic part

2006-03-28 09:16:05 -08:00

relay.c

[PATCH] relay: consolidate sendfile() and read() code

2006-03-23 19:58:45 +01:00

resource.c

…

sched.c

[PATCH] for_each_possible_cpu: fixes for generic part

2006-03-28 09:16:05 -08:00

seccomp.c

…

signal.c

[PATCH] copy_process: cleanup bad_fork_cleanup_sighand

2006-03-28 18:36:42 -08:00

softirq.c

[PATCH] on_each_cpu(): disable local interrupts

2006-03-22 07:53:59 -08:00

softlockup.c

[PATCH] Notifier chain update: API changes

2006-03-27 08:44:50 -08:00

spinlock.c

[PATCH] BUILD_LOCK_OPS: cleanup preempt_disable() usage

2006-03-23 07:38:16 -08:00

stop_machine.c

…

sys_ni.c

[PATCH] lightweight robust futexes: core

2006-03-27 08:44:49 -08:00

sys.c

[PATCH] Notifier chain update: API changes

2006-03-27 08:44:50 -08:00

sysctl.c

[PATCH] Range checking in do_proc_dointvec_(userhz_)jiffies_conv

2006-03-24 07:33:20 -08:00

time.c

[PATCH] hrtimers: remove nsec_t typedef

2006-03-26 08:57:03 -08:00

timer.c

[PATCH] remove pps support

2006-03-25 08:23:02 -08:00

uid16.c

[PATCH] move capable() to capability.h

2006-01-11 18:42:13 -08:00

user.c

[PATCH] free_uid() locking improvement

2006-03-24 07:33:20 -08:00

wait.c

…

workqueue.c

[SCSI] add execute_in_process_context() API

2006-02-27 23:34:40 -06:00