Andy Lutomirski b18cb64ead fs/proc: Stop trying to report thread stacks ... This reverts more of: b76437579d ("procfs: mark thread stack correctly in proc/<pid>/maps") ... which was partially reverted by: 65376df582 ("proc: revert /proc/<pid>/maps [stack:TID] annotation") Originally, /proc/PID/task/TID/maps was the same as /proc/TID/maps. In current kernels, /proc/PID/maps (or /proc/TID/maps even for threads) shows "[stack]" for VMAs in the mm's stack address range. In contrast, /proc/PID/task/TID/maps uses KSTK_ESP to guess the target thread's stack's VMA. This is racy, probably returns garbage and, on arches with CONFIG_TASK_INFO_IN_THREAD=y, is also crash-prone: KSTK_ESP is not safe to use on tasks that aren't known to be running ordinary process-context kernel code. This patch removes the difference and just shows "[stack]" for VMAs in the mm's stack range. This is IMO much more sensible -- the actual "stack" address really is treated specially by the VM code, and the current thread stack isn't even well-defined for programs that frequently switch stacks on their own. Reported-by: Jann Horn <jann@thejh.net> Signed-off-by: Andy Lutomirski <luto@kernel.org> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Linux API <linux-api@vger.kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tycho Andersen <tycho.andersen@canonical.com> Link: http://lkml.kernel.org/r/3e678474ec14e0a0ec34c611016753eea2e1b8ba.1475257877.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>		2016-10-20 09:21:41 +02:00
..
caching
cifs
configfs
nfs
pohmelfs
9p.txt
00-INDEX	Doc: update 00-INDEX files to reflect the runnable code move	2016-10-10 07:12:09 -06:00
adfs.txt
affs.txt
afs.txt
autofs4-mount-control.txt	autofs: update struct autofs_dev_ioctl in Documentation	2016-10-11 15:06:31 -07:00
autofs4.txt	autofs: fix typos in Documentation/filesystems/autofs4.txt	2016-10-11 15:06:31 -07:00
automount-support.txt
befs.txt
bfs.txt
btrfs.txt
ceph.txt	ceph: fix description for rsize and rasize mount options	2016-10-03 16:13:50 +02:00
coda.txt
cramfs.txt
dax.txt	dax : Fix documentation with respect to struct pages	2016-10-01 00:52:18 -06:00
debugfs.txt
devpts.txt
directory-locking
dlmfs.txt
dnotify.txt
ecryptfs.txt
efivarfs.txt
exofs.txt
ext2.txt
ext3.txt
ext4.txt
f2fs.txt
fiemap.txt
files.txt
fuse.txt
gfs2-glocks.txt
gfs2-uevents.txt
gfs2.txt
hfs.txt
hfsplus.txt
hpfs.txt
inotify.txt
isofs.txt
jfs.txt
Locking	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-10-10 20:16:43 -07:00
locks.txt
logfs.txt
mandatory-locking.txt
ncpfs.txt
nilfs2.txt
ntfs.txt
ocfs2-online-filecheck.txt
ocfs2.txt
omfs.txt
orangefs.txt
overlayfs.txt
path-lookup.md
path-lookup.txt
porting	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-10-10 20:16:43 -07:00
proc.txt	fs/proc: Stop trying to report thread stacks	2016-10-20 09:21:41 +02:00
qnx6.txt
quota.txt
ramfs-rootfs-initramfs.txt
relay.txt
romfs.txt
seq_file.txt
sharedsubtree.txt
spufs.txt
squashfs.txt
sysfs-pci.txt
sysfs-tagging.txt
sysfs.txt
sysv-fs.txt
tmpfs.txt
ubifs.txt
udf.txt
ufs.txt
vfat.txt
vfs.txt	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-10-10 20:16:43 -07:00
xfs-delayed-logging-design.txt
xfs-self-describing-metadata.txt
xfs.txt