Jiri Olsa 816619eef3 UPSTREAM: fs/proc/kcore.c: Add bounce buffer for ktext data ...

We hit hardened usercopy feature check for kernel text access by reading
kcore file:

  usercopy: kernel memory exposure attempt detected from ffffffff8179a01f (<kernel text>) (4065 bytes)
  kernel BUG at mm/usercopy.c:75!

Bypassing this check for kcore by adding bounce buffer for ktext data.

Reported-by: Steve Best <sbest@redhat.com>
Fixes: f5509cc18daa ("mm: Hardened usercopy")
Suggested-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Bug: 31374226
Change-Id: Ic93e6041b67d804a994518bf4950811f828b406e
(cherry picked from commit df04abfd181acc276ba6762c8206891ae10ae00d)
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>

2016-10-12 17:34:22 +05:30

..

array.c

ptrace: use fsuid, fsgid, effective creds for fs access checks

2016-02-25 12:01:16 -08:00

base.c

Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android

2016-10-11 23:33:37 +02:00

cmdline.c

…

consoles.c

…

cpuinfo.c

…

devices.c

…

fd.c

proc: actually make proc_fd_permission() thread-friendly

2015-11-06 17:50:42 -08:00

fd.h

…

generic.c

proc: change proc_subdir_lock to a rwlock

2015-09-10 13:29:01 -07:00

inode.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2015-07-03 15:20:57 -07:00

internal.h

proc: Allow creating permanently empty directories that serve as mount points

2015-07-01 10:36:41 -05:00

interrupts.c

…

Kconfig

fs, proc: add help for CONFIG_PROC_CHILDREN

2015-07-17 16:39:52 -07:00

kcore.c

UPSTREAM: fs/proc/kcore.c: Add bounce buffer for ktext data

2016-10-12 17:34:22 +05:30

kmsg.c

…

loadavg.c

…

Makefile

proc: Implement /proc/thread-self to point at the directory of the current thread

2014-08-04 10:07:11 -07:00

meminfo.c

mm: get rid of 'vmalloc_info' from /proc/meminfo

2015-11-01 17:09:15 -08:00

namespaces.c

ptrace: use fsuid, fsgid, effective creds for fs access checks

2016-02-25 12:01:16 -08:00

nommu.c

vfs: add seq_file_path() helper

2015-06-23 18:01:07 -04:00

page.c

proc: add cond_resched to /proc/kpage* read/write loop

2015-09-10 13:29:01 -07:00

proc_net.c

VFS: normal filesystems (and lustre): d_inode() annotations

2015-04-15 15:06:57 -04:00

proc_sysctl.c

fs: Drop unlikely before IS_ERR(_OR_NULL)

2015-09-29 15:13:58 +02:00

proc_tty.c

proc: remove proc_tty_ldisc variable

2014-08-08 15:57:22 -07:00

root.c

proc: prevent stacking filesystems on top

2016-06-24 10:18:20 -07:00

self.c

don't pass nameidata to ->follow_link()

2015-05-10 22:20:15 -04:00

softirqs.c

…

stat.c

genirq: Prevent proc race against freeing of irq descriptors

2014-12-13 13:33:07 +01:00

task_mmu.c

Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android

2016-09-20 15:18:54 +08:00

task_nommu.c

proc: revert /proc/<pid>/maps [stack:TID] annotation

2016-09-15 08:27:46 +02:00

thread_self.c

don't pass nameidata to ->follow_link()

2015-05-10 22:20:15 -04:00

uptime.c

cputime: Default implementation of nsecs -> cputime conversion

2014-03-13 15:56:43 +01:00

version.c

…

vmcore.c

vmcore: fix PT_NOTE n_namesz, n_descsz overflow issue

2015-02-17 14:34:52 -08:00