diff options
| author |   Jan-Simon Möller <jsmoeller@linuxfoundation.org> | 2017-06-28 12:58:35 +0200 |
|---|---|---|
| committer | Jan-Simon Moeller <jsmoeller@linuxfoundation.org> | 2017-06-29 08:57:55 +0000 |
| commit | 79c117d899accd877128ac0bc9144a080e9b9233 (patch) | |
| tree | 800a07e3678d26a927684b9ae7f5292b4d44cb42 /meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/files/0002-Allow-stack-to-grow-up-to-address-space-limit.patch | |
| parent | 4220a13fe29cdde2f2a82a1ec1de0ff3f7aedc63 (diff) | |
Fix CVE-2017-1000364 by backporting the patches for gen3
Backport of patches from upstream for 4.9
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?h=linux-4.9.y&id=cfc0eb403816c5c4f9667d959de5e22789b5421e
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?h=linux-4.9.y&id=5d10ad6297260e9b85e7645ee544a6115bb229e4
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?h=linux-4.9.y&id=ce7fe8595902c3f03ef528c2dc1928b3f4b67fcf
Bug-AGL: SPEC-705 SPEC-707
Change-Id: I6ff3543fbe09e29511acc1f7a27c5ac961ada28d
Signed-off-by: Jan-Simon Möller <jsmoeller@linuxfoundation.org>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/9885
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
Reviewed-by: Stéphane Desneux <stephane.desneux@iot.bzh>
Diffstat (limited to 'meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/files/0002-Allow-stack-to-grow-up-to-address-space-limit.patch')
| -rw-r--r-- | meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/files/0002-Allow-stack-to-grow-up-to-address-space-limit.patch | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/files/0002-Allow-stack-to-grow-up-to-address-space-limit.patch b/meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/files/0002-Allow-stack-to-grow-up-to-address-space-limit.patch new file mode 100644 index 000000000..10e247197 --- /dev/null +++ b/meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/files/0002-Allow-stack-to-grow-up-to-address-space-limit.patch @@ -0,0 +1,51 @@ +From 9e8b9c4bd3b16bd70d8be10c465bd0a91ac569fa Mon Sep 17 00:00:00 2001 +From: Helge Deller <deller@gmx.de> +Date: Mon, 19 Jun 2017 17:34:05 +0200 +Subject: [PATCH 2/3] Allow stack to grow up to address space limit + +commit bd726c90b6b8ce87602208701b208a208e6d5600 upstream. + +Fix expand_upwards() on architectures with an upward-growing stack (parisc, +metag and partly IA-64) to allow the stack to reliably grow exactly up to +the address space limit given by TASK_SIZE. + +Signed-off-by: Helge Deller <deller@gmx.de> +Acked-by: Hugh Dickins <hughd@google.com> +Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + mm/mmap.c | 13 ++++++++----- + 1 file changed, 8 insertions(+), 5 deletions(-) + +diff --git a/mm/mmap.c b/mm/mmap.c +index 26542b3..d71a61e 100644 +--- a/mm/mmap.c ++++ b/mm/mmap.c +@@ -2224,16 +2224,19 @@ int expand_upwards(struct vm_area_struct *vma, unsigned long address) + if (!(vma->vm_flags & VM_GROWSUP)) + return -EFAULT; + +- /* Guard against wrapping around to address 0. */ ++ /* Guard against exceeding limits of the address space. */ + address &= PAGE_MASK; +- address += PAGE_SIZE; +- if (!address) ++ if (address >= TASK_SIZE) + return -ENOMEM; ++ address += PAGE_SIZE; + + /* Enforce stack_guard_gap */ + gap_addr = address + stack_guard_gap; +- if (gap_addr < address) +- return -ENOMEM; ++ ++ /* Guard against overflow */ ++ if (gap_addr < address || gap_addr > TASK_SIZE) ++ gap_addr = TASK_SIZE; ++ + next = vma->vm_next; + if (next && next->vm_start < gap_addr) { + if (!(next->vm_flags & VM_GROWSUP)) +-- +2.1.4 + |