diff options
| author |   Jan-Simon Möller <jsmoeller@linuxfoundation.org> | 2017-07-25 16:28:17 +0200 |
|---|---|---|
| committer | Jan-Simon Moeller <jsmoeller@linuxfoundation.org> | 2017-07-26 11:28:45 +0000 |
| commit | 986afefd22b5c6184ad42667bbc203ee47e83431 (patch) | |
| tree | 027696719ede2e5388fabf40a94f85b0ec09da34 /meta-agl-bsp/recipes-kernel/linux/linux-yocto/4.4-0002-Allow-stack-to-grow-up-to-address-space-limit.patch | |
| parent | 2c450f52870636176ae3ab7e9ba7596d45ecf85d (diff) | |
Fix cve patch for kernel 4.4 on intel joule [master/dab]
Bug-AGL: SPEC-766
Change-Id: Ibe60bc5ba5ba505bdc71a199cf14fb25e2acefbd
Signed-off-by: Jan-Simon Möller <jsmoeller@linuxfoundation.org>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/10369
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-boot-test: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
Reviewed-by: Dominig ar Foll <dominig.arfoll@fridu.net>
Diffstat (limited to 'meta-agl-bsp/recipes-kernel/linux/linux-yocto/4.4-0002-Allow-stack-to-grow-up-to-address-space-limit.patch')
| -rw-r--r-- | meta-agl-bsp/recipes-kernel/linux/linux-yocto/4.4-0002-Allow-stack-to-grow-up-to-address-space-limit.patch | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/meta-agl-bsp/recipes-kernel/linux/linux-yocto/4.4-0002-Allow-stack-to-grow-up-to-address-space-limit.patch b/meta-agl-bsp/recipes-kernel/linux/linux-yocto/4.4-0002-Allow-stack-to-grow-up-to-address-space-limit.patch new file mode 100644 index 000000000..d0c94cef2 --- /dev/null +++ b/meta-agl-bsp/recipes-kernel/linux/linux-yocto/4.4-0002-Allow-stack-to-grow-up-to-address-space-limit.patch @@ -0,0 +1,51 @@ +From cd20f002742028366c33b38b3ca613eaee4582c9 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 5e043dd..fcf4c88 100644 +--- a/mm/mmap.c ++++ b/mm/mmap.c +@@ -2172,16 +2172,19 @@ 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 + |