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Re: [kernel-hardening] Re: [PATCH 3.18 01/33] Revert "stackprotector: Increase the per-task stack canarys random range from 32 bits to 64 bits on 64-bit platforms"

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On Mon, Jun 05, 2017 at 01:06:52PM -0700, Eric Biggers wrote:
> On Mon, Jun 05, 2017 at 12:13:11PM -0700, Kees Cook wrote:
> > On Mon, Jun 5, 2017 at 9:16 AM, Greg Kroah-Hartman
> > <gregkh@linuxfoundation.org> wrote:
> > > 3.18-stable review patch.  If anyone has any objections, please let me know.
> > >
> > > ------------------
> > >
> > > From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > >
> > > This reverts commit 609a3e81550b0b4ea87197b0f59455a7bcff975a which is
> > > commit 5ea30e4e58040cfd6434c2f33dc3ea76e2c15b05 upstream.
> > >
> > > It shouldn't have been backported to 3.18, as we do not have
> > > get_random_long() in that kernel tree.
> > 
> > It should be possible to trivially backport
> > ec9ee4acd97c0039a61c0ae4f12705767ae62153 to gain get_random_long().
> > 
> > -Kees
> 
> If that's done it may be a good idea to take
> b1132deac01c2332d234fa821a70022796b79182 as well, which fixed an alignment bug
> in get_random_long().

Good idea for both of these, I'll do that in the next round of releases.

thanks,

greg k-h

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[PATCH 3.18 00/33] 3.18.56-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-05 18:20 +0200
  [PATCH 3.18 06/33] s390/qeth: avoid null pointer dereference on OSN Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-05 18:20 +0200
  [PATCH 3.18 23/33] mm/migrate: fix refcount handling when !hugepage_migration_supported() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-05 18:20 +0200
  [PATCH 3.18 20/33] ALSA: hda - apply STAC_9200_DELL_M22 quirk for Dell Latitude D430 Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-05 18:20 +0200
  [PATCH 3.18 12/33] ipv6: Check ip6_find_1stfragopt() return value properly. Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-05 18:20 +0200
  [PATCH 3.18 16/33] sctp: fix ICMP processing if skb is non-linear Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-05 18:20 +0200
  [PATCH 3.18 30/33] xfs: fix up quotacheck buffer list error handling Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-05 18:20 +0200
  [PATCH 3.18 22/33] drm/gma500/psb: Actually use VBT mode when it is found Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-05 18:30 +0200
  [PATCH 3.18 33/33] xfs: fix unaligned access in xfs_btree_visit_blocks Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-05 19:40 +0200
  [PATCH 3.18 08/33] sctp: fix src address selection if using secondary addresses for ipv6 Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-05 19:40 +0200
  [PATCH 3.18 14/33] ipv6: fix out of bound writes in __ip6_append_data() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-05 19:40 +0200
  [PATCH 3.18 29/33] xfs: prevent multi-fsb dir readahead from reading random blocks Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-05 19:40 +0200
  [PATCH 3.18 32/33] xfs: bad assertion for delalloc an extent that start at i_size Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-05 19:40 +0200
  [PATCH 3.18 27/33] xfs: fix over-copying of getbmap parameters from userspace Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-05 19:40 +0200
  [PATCH 3.18 21/33] slub/memcg: cure the brainless abuse of sysfs attributes Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-05 19:40 +0200
  [PATCH 3.18 31/33] xfs: fix indlen accounting error on partial delalloc conversion Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-05 19:40 +0200
  Re: [PATCH 3.18 01/33] Revert "stackprotector: Increase the per-task  stack canarys random range from 32 bits to 64 bits on 64-bit platforms" Kees Cook <keescook@chromium.org> - 2017-06-05 21:20 +0200
    Re: [kernel-hardening] Re: [PATCH 3.18 01/33] Revert  "stackprotector: Increase the per-task stack canarys random range from 32  bits to 64 bits on 64-bit platforms" Eric Biggers <ebiggers3@gmail.com> - 2017-06-05 22:10 +0200
      Re: [kernel-hardening] Re: [PATCH 3.18 01/33] Revert  "stackprotector: Increase the per-task stack canarys random range from 32  bits to 64 bits on 64-bit platforms" Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-06 09:30 +0200
  Re: [PATCH 3.18 00/33] 3.18.56-stable review Shuah Khan <shuahkh@osg.samsung.com> - 2017-06-05 22:40 +0200
  Re: [PATCH 3.18 00/33] 3.18.56-stable review Guenter Roeck <linux@roeck-us.net> - 2017-06-06 00:10 +0200
  Re: [PATCH 3.18 00/33] 3.18.56-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-06 09:30 +0200
    Re: [PATCH 3.18 00/33] 3.18.56-stable review Kevin Hilman <khilman@baylibre.com> - 2017-06-06 23:00 +0200

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