diff options
author | Jan-Simon Möller <jsmoeller@linuxfoundation.org> | 2017-06-28 11:46:43 +0200 |
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committer | Jan-Simon Moeller <jsmoeller@linuxfoundation.org> | 2017-06-29 08:57:24 +0000 |
commit | 12fe812bc3200fcacaef62e906956590ded33118 (patch) | |
tree | 0991e234578e1eb1a3c1275e714755888d688391 /meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi-4.4/0003-mm-fix-new-crash-in-unmapped_area_topdown.patch | |
parent | 900c064d040ef371c88215ee92b8c5d743447f76 (diff) |
Fix CVE-2017-1000364 by backporting the patches for rpi3
Backport of patches from upstream for 4.4
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?h=v4.4.74&id=4b359430674caa2c98d0049a6941f157d2a33741
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?h=v4.4.74&id=f41512c6acb71c63cf4e3bd50934365ae2a23891
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?h=v4.4.74&id=1f2284fac2180d7a9442c796d9755e3ce7ab0bd9
Bug-AGL: SPEC-705 SPEC-706
Change-Id: I66fa6e271095c2319791480089a9e6f3392c51d3
Signed-off-by: Jan-Simon Möller <jsmoeller@linuxfoundation.org>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/9875
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-boot-test: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
Reviewed-by: Leon Anavi <leon.anavi@konsulko.com>
Diffstat (limited to 'meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi-4.4/0003-mm-fix-new-crash-in-unmapped_area_topdown.patch')
-rw-r--r-- | meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi-4.4/0003-mm-fix-new-crash-in-unmapped_area_topdown.patch | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi-4.4/0003-mm-fix-new-crash-in-unmapped_area_topdown.patch b/meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi-4.4/0003-mm-fix-new-crash-in-unmapped_area_topdown.patch new file mode 100644 index 000000000..fc8c0dbd6 --- /dev/null +++ b/meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi-4.4/0003-mm-fix-new-crash-in-unmapped_area_topdown.patch @@ -0,0 +1,65 @@ +From 7911c0e350bb30a342518e40aebe2e8729be179d Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Jan-Simon=20M=C3=B6ller?= <jsmoeller@linuxfoundation.org> +Date: Wed, 28 Jun 2017 02:48:06 +0200 +Subject: [PATCH 3/3] mm: fix new crash in unmapped_area_topdown() +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +From 1c182004bcb1cd619b58ba6631b9d88052d18e02 Mon Sep 17 00:00:00 2001 +From: Hugh Dickins <hughd@google.com> +Date: Tue, 20 Jun 2017 02:10:44 -0700 +Subject: [PATCH 3/3] mm: fix new crash in unmapped_area_topdown() + +commit f4cb767d76cf7ee72f97dd76f6cfa6c76a5edc89 upstream. + +Trinity gets kernel BUG at mm/mmap.c:1963! in about 3 minutes of +mmap testing. That's the VM_BUG_ON(gap_end < gap_start) at the +end of unmapped_area_topdown(). Linus points out how MAP_FIXED +(which does not have to respect our stack guard gap intentions) +could result in gap_end below gap_start there. Fix that, and +the similar case in its alternative, unmapped_area(). + +Fixes: 1be7107fbe18 ("mm: larger stack guard gap, between vmas") +Reported-by: Dave Jones <davej@codemonkey.org.uk> +Debugged-by: Linus Torvalds <torvalds@linux-foundation.org> +Signed-off-by: Hugh Dickins <hughd@google.com> +Acked-by: Michal Hocko <mhocko@suse.com> +Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + mm/mmap.c | 6 ++++-- + 1 file changed, 4 insertions(+), 2 deletions(-) + +Signed-off-by: Jan-Simon Möller <jsmoeller@linuxfoundation.org> +--- + mm/mmap.c | 6 ++++-- + 1 file changed, 4 insertions(+), 2 deletions(-) + +diff --git a/mm/mmap.c b/mm/mmap.c +index fcf4c88..0990f8b 100644 +--- a/mm/mmap.c ++++ b/mm/mmap.c +@@ -1771,7 +1771,8 @@ check_current: + /* Check if current node has a suitable gap */ + if (gap_start > high_limit) + return -ENOMEM; +- if (gap_end >= low_limit && gap_end - gap_start >= length) ++ if (gap_end >= low_limit && ++ gap_end > gap_start && gap_end - gap_start >= length) + goto found; + + /* Visit right subtree if it looks promising */ +@@ -1874,7 +1875,8 @@ check_current: + gap_end = vm_start_gap(vma); + if (gap_end < low_limit) + return -ENOMEM; +- if (gap_start <= high_limit && gap_end - gap_start >= length) ++ if (gap_start <= high_limit && ++ gap_end > gap_start && gap_end - gap_start >= length) + goto found; + + /* Visit left subtree if it looks promising */ +-- +2.1.4 + |