Peter Xu e9fe1283a8 mm/smaps: don't access young/dirty bit if pte unpresent ... [ Upstream commit efd4149342 ] 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> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-08-31 17:15:16 +02:00
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array.c	seccomp: Fix CONFIG tests for Seccomp_filters	2021-05-14 09:50:24 +02:00
base.c	proc: Avoid mixing integer types in mem_rw()	2021-07-28 14:35:42 +02:00
bootconfig.c	proc: bootconfig: Add null pointer check	2022-04-08 14:40:42 +02:00
cmdline.c
consoles.c
cpuinfo.c	proc/cpuinfo: switch to ->read_iter	2020-11-06 10:05:18 -08:00
devices.c
fd.c
fd.h
generic.c	proc: fix dentry/inode overinstantiating under /proc/${pid}/net	2022-06-09 10:21:17 +02:00
inode.c	proc: wire up generic_file_splice_read for iter ops	2020-11-06 10:05:18 -08:00
internal.h	proc: fix lookup in /proc/net subdirectories after setns(2)	2020-12-30 11:53:56 +01:00
interrupts.c
Kconfig
kcore.c	arm: remove CONFIG_ARCH_HAS_HOLES_MEMORYMODEL	2022-05-15 20:00:09 +02:00
kmsg.c
loadavg.c
Makefile
meminfo.c	proc/meminfo: avoid open coded reading of vm_committed_as	2020-08-07 11:33:26 -07:00
namespaces.c
nommu.c
page.c	mm: Add PG_arch_2 page flag	2020-09-04 12:46:06 +01:00
proc_net.c	proc: fix dentry/inode overinstantiating under /proc/${pid}/net	2022-06-09 10:21:17 +02:00
proc_sysctl.c	proc: use kvzalloc for our kernel buffer	2021-03-04 11:38:21 +01:00
proc_tty.c
root.c
self.c	proc: don't allow async path resolution of /proc/thread-self components	2021-03-04 11:38:42 +01:00
softirqs.c
stat.c	fs/proc/uptime.c: Fix idle time reporting in /proc/uptime	2021-11-18 14:03:56 +01:00
task_mmu.c	mm/smaps: don't access young/dirty bit if pte unpresent	2022-08-31 17:15:16 +02:00
task_nommu.c
thread_self.c	proc: don't allow async path resolution of /proc/thread-self components	2021-03-04 11:38:42 +01:00
uptime.c	fs/proc/uptime.c: Fix idle time reporting in /proc/uptime	2021-11-18 14:03:56 +01:00
util.c
version.c
vmcore.c	proc/vmcore: fix clearing user buffer by properly using clear_user()	2021-12-01 09:19:02 +01:00