Peter Xu efd4149342 mm/smaps: don't access young/dirty bit if pte unpresent ... These bits should only be valid when the ptes are present. Introducing two booleans for it and set it to false when !pte_present() for both pte and pmd accountings. The bug is found during code reading and no real world issue reported, but logically such an error can cause incorrect readings for either smaps or smaps_rollup output on quite a few fields. For example, it could cause over-estimate on values like Shared_Dirty, Private_Dirty, Referenced. Or it could also cause under-estimate on values like LazyFree, Shared_Clean, Private_Clean. Link: https://lkml.kernel.org/r/20220805160003.58929-1-peterx@redhat.com Fixes: b1d4d9e0cb ("proc/smaps: carefully handle migration entries") Fixes: c94b6923fa ("/proc/PID/smaps: Add PMD migration entry parsing") Signed-off-by: Peter Xu <peterx@redhat.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Yang Shi <shy828301@gmail.com> Cc: Konstantin Khlebnikov <khlebnikov@openvz.org> Cc: Huang Ying <ying.huang@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>		2022-08-20 15:17:45 -07:00
..
array.c	proc: add some (hopefully) insightful comments	2022-07-29 18:12:35 -07:00
base.c	proc: fix a dentry lock race between release_task and lookup	2022-07-17 17:31:43 -07:00
bootconfig.c	proc: bootconfig: Add null pointer check	2022-04-02 08:40:09 -04:00
cmdline.c
consoles.c
cpuinfo.c	x86/aperfmperf: Replace aperfmperf_get_khz()	2022-04-27 20:22:19 +02:00
devices.c	block: move block-related definitions out of fs.h	2020-06-24 09:16:02 -06:00
fd.c	procfs: prevent unprivileged processes accessing fdinfo dir	2022-05-09 17:34:28 -07:00
fd.h	fs: make helpers idmap mount aware	2021-01-24 14:27:20 +01:00
generic.c	proc: fix dentry/inode overinstantiating under /proc/${pid}/net	2022-05-09 18:29:19 -07:00
inode.c	take care to handle NULL ->proc_lseek()	2022-08-14 15:16:18 -04:00
internal.h	fs: proc: store PDE()->data into inode->i_private	2022-01-22 08:33:37 +02:00
interrupts.c
Kconfig	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
kcore.c	fs/proc/kcore.c: remove check of list iterator against head past the loop body	2022-04-29 14:37:59 -07:00
kmsg.c	proc: delete unused <linux/uaccess.h> includes	2022-07-17 17:31:39 -07:00
loadavg.c	sched: Make nr_running() return 32-bit value	2021-05-12 21:34:14 +02:00
Makefile	proc: bootconfig: Add /proc/bootconfig to show boot config list	2020-01-13 13:19:39 -05:00
meminfo.c	mm: zswap: add basic meminfo and vmstat coverage	2022-05-19 14:08:53 -07:00
namespaces.c	Merge branch 'work.openat2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2020-01-29 11:20:24 -08:00
nommu.c	proc: delete unused <linux/uaccess.h> includes	2022-07-17 17:31:39 -07:00
page.c	mm: don't include <linux/memremap.h> in <linux/mm.h>	2022-03-03 12:47:33 -05:00
proc_net.c	proc: add some (hopefully) insightful comments	2022-07-29 18:12:35 -07:00
proc_sysctl.c	sysctl changes for v5.19-rc1	2022-05-26 16:57:20 -07:00
proc_tty.c	proc: delete unused <linux/uaccess.h> includes	2022-07-17 17:31:39 -07:00
root.c	proc: add some (hopefully) insightful comments	2022-07-29 18:12:35 -07:00
self.c	Revert "proc: don't allow async path resolution of /proc/self components"	2021-02-23 20:32:11 -07:00
softirqs.c
stat.c	fs/proc/uptime.c: Fix idle time reporting in /proc/uptime	2021-10-05 15:51:35 +02:00
task_mmu.c	mm/smaps: don't access young/dirty bit if pte unpresent	2022-08-20 15:17:45 -07:00
task_nommu.c	mmap locking API: use coccinelle to convert mmap_sem rwsem call sites	2020-06-09 09:39:14 -07:00
thread_self.c	Revert "proc: don't allow async path resolution of /proc/thread-self components"	2021-02-23 20:32:11 -07:00
uptime.c	fs/proc/uptime.c: Fix idle time reporting in /proc/uptime	2021-10-05 15:51:35 +02:00
util.c
version.c
vmcore.c	proc: delete unused <linux/uaccess.h> includes	2022-07-17 17:31:39 -07:00