KAMEZAWA Hiroyuki 9e7814404b hold task->mempolicy while numa_maps scans. ... /proc/<pid>/numa_maps scans vma and show mempolicy under mmap_sem. It sometimes accesses task->mempolicy which can be freed without mmap_sem and numa_maps can show some garbage while scanning. This patch tries to take reference count of task->mempolicy at reading numa_maps before calling get_vma_policy(). By this, task->mempolicy will not be freed until numa_maps reaches its end. V2->v3 - updated comments to be more verbose. - removed task_lock() in numa_maps code. V1->V2 - access task->mempolicy only once and remember it. Becase kernel/exit.c can overwrite it. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: David Rientjes <rientjes@google.com> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2012-10-19 14:32:10 -07:00
..
array.c	c/r: procfs: add arg_start/end, env_start/end and exit_code members to /proc/$pid/stat	2012-05-31 17:49:32 -07:00
base.c	procfs: don't need a PATH_MAX allocation to hold a string representation of an int	2012-10-12 20:15:10 -04:00
cmdline.c	proc: switch /proc/cmdline to seq_file	2008-10-23 14:29:04 +04:00
consoles.c	console: rename acquire/release_console_sem() to console_lock/unlock()	2011-01-26 10:50:06 +10:00
cpuinfo.c	proc: move /proc/cpuinfo code to fs/proc/cpuinfo.c	2008-10-23 15:05:11 +04:00
devices.c	proc: use seq_puts()/seq_putc() where possible	2011-01-13 08:03:16 -08:00
fd.c	don't leak O_CLOEXEC into ->f_flags	2012-09-26 21:10:01 -04:00
fd.h	procfs: Move /proc/pid/fd[info] handling code to fd.[ch]	2012-09-26 21:10:01 -04:00
generic.c	proc: use kzalloc instead of kmalloc and memset	2012-10-06 03:05:18 +09:00
inode.c	proc: no need to initialize proc_inode->fd in proc_get_inode()	2012-10-06 03:05:18 +09:00
internal.h	hold task->mempolicy while numa_maps scans.	2012-10-19 14:32:10 -07:00
interrupts.c	proc: move /proc/interrupts boilerplate code to fs/proc/interrupts.c	2008-10-23 15:15:46 +04:00
Kconfig	kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT	2011-01-20 17:02:05 -08:00
kcore.c	fs/proc/kcore.c: make get_sparsemem_vmemmap_info() static	2012-03-23 16:58:42 -07:00
kmsg.c	procfs: Use generic_file_llseek in /proc/kmsg	2010-04-09 16:35:41 +02:00
loadavg.c	sched, timers: cleanup avenrun users	2009-05-15 15:32:45 +02:00
Makefile	procfs: Move /proc/pid/fd[info] handling code to fd.[ch]	2012-09-26 21:10:01 -04:00
meminfo.c	fs/proc/meminfo.c: fix compilation error	2011-12-09 07:50:28 -08:00
mmu.c	fs/proc/mmu.c: headers butchery	2007-10-17 08:42:48 -07:00
namespaces.c	stop passing nameidata to ->lookup()	2012-07-14 16:34:32 +04:00
nommu.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
page.c	kpageflags: fix wrong KPF_THP on non-huge compound pages	2012-10-09 16:23:00 +09:00
proc_devtree.c	of: Improve prom_update_property() function	2012-07-11 15:26:51 +10:00
proc_net.c	stop passing nameidata to ->lookup()	2012-07-14 16:34:32 +04:00
proc_sysctl.c	rbtree: fix incorrect rbtree node insertion in fs/proc/proc_sysctl.c	2012-10-09 16:22:32 +09:00
proc_tty.c	proc: use seq_puts()/seq_putc() where possible	2011-01-13 08:03:16 -08:00
root.c	fs/proc/root.c: use NULL instead of 0 for pointer	2012-10-06 03:05:19 +09:00
softirqs.c	proc: use seq_puts()/seq_putc() where possible	2011-01-13 08:03:16 -08:00
stat.c	proc: stats: Use arch_idle_time for idle and iowait times if available	2012-03-30 15:43:33 +02:00
task_mmu.c	hold task->mempolicy while numa_maps scans.	2012-10-19 14:32:10 -07:00
task_nommu.c	proc: remove mm_for_maps()	2012-05-31 17:49:28 -07:00
uptime.c	Merge branch 'sched/core' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into cputime-tip	2011-12-19 19:23:15 +01:00
version.c	proc: switch /proc/version to seq_file	2008-10-23 14:19:58 +04:00
vmcore.c	fadump: Introduce cleanup routine to invalidate /proc/vmcore.	2012-02-23 10:50:02 +11:00