diff options
Diffstat (limited to 'sys-kernel/cairn-sources/files/5.10.9/hardened-patches/0094-x86_64-bound-mmap-between-legacy-modern-bases.patch')
| -rw-r--r-- | sys-kernel/cairn-sources/files/5.10.9/hardened-patches/0094-x86_64-bound-mmap-between-legacy-modern-bases.patch | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/sys-kernel/cairn-sources/files/5.10.9/hardened-patches/0094-x86_64-bound-mmap-between-legacy-modern-bases.patch b/sys-kernel/cairn-sources/files/5.10.9/hardened-patches/0094-x86_64-bound-mmap-between-legacy-modern-bases.patch new file mode 100644 index 000000000000..0c4b52905e2f --- /dev/null +++ b/sys-kernel/cairn-sources/files/5.10.9/hardened-patches/0094-x86_64-bound-mmap-between-legacy-modern-bases.patch @@ -0,0 +1,37 @@ +From c30867dd77734d7b2b894878719358c026ee0d05 Mon Sep 17 00:00:00 2001 +From: Daniel Micay <danielmicay@gmail.com> +Date: Tue, 4 Jul 2017 14:50:54 -0400 +Subject: [PATCH 094/113] x86_64: bound mmap between legacy/modern bases + +--- + arch/x86/kernel/sys_x86_64.c | 7 ++----- + 1 file changed, 2 insertions(+), 5 deletions(-) + +diff --git a/arch/x86/kernel/sys_x86_64.c b/arch/x86/kernel/sys_x86_64.c +index c4e35a3b3733..e30ec4c750d1 100644 +--- a/arch/x86/kernel/sys_x86_64.c ++++ b/arch/x86/kernel/sys_x86_64.c +@@ -113,10 +113,7 @@ static void find_start_end(unsigned long addr, unsigned long flags, + } + + *begin = get_mmap_base(1); +- if (in_32bit_syscall()) +- *end = task_size_32bit(); +- else +- *end = task_size_64bit(addr > DEFAULT_MAP_WINDOW); ++ *end = get_mmap_base(0); + } + + unsigned long +@@ -193,7 +190,7 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, + + info.flags = VM_UNMAPPED_AREA_TOPDOWN; + info.length = len; +- info.low_limit = PAGE_SIZE; ++ info.low_limit = get_mmap_base(1); + info.high_limit = get_mmap_base(0); + + /* +-- +2.30.0 + |