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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2015-05-15 13:06:06 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-05-15 13:06:06 -0700 |
| commit | 4b470f120817a16ea28da6141ea6e3a3040b297b (patch) | |
| tree | 8550d22831fb39fee6c758a5904c37ec81b9e2f7 /fs | |
| parent | Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip (diff) | |
| parent | parisc,metag: Fix crashes due to stack randomization on stack-grows-upwards architectures (diff) | |
| download | linux-dev-4b470f120817a16ea28da6141ea6e3a3040b297b.tar.xz linux-dev-4b470f120817a16ea28da6141ea6e3a3040b297b.zip | |
Merge branch 'parisc-4.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc fixes from Helge Deller:
"One important patch which fixes crashes due to stack randomization on
architectures where the stack grows upwards (currently parisc and
metag only).
This bug went unnoticed on parisc since kernel 3.14 where the flexible
mmap memory layout support was added by commit 9dabf60dc4ab. The
changes in fs/exec.c are inside an #ifdef CONFIG_STACK_GROWSUP section
and will not affect other platforms.
The other two patches rename args of the kthread_arg() function and
fixes a printk output"
* 'parisc-4.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc,metag: Fix crashes due to stack randomization on stack-grows-upwards architectures
parisc: copy_thread(): rename 'arg' argument to 'kthread_arg'
parisc: %pf is only for function pointers
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/exec.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/exec.c b/fs/exec.c index 49a1c61433b7..1977c2a553ac 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -659,6 +659,9 @@ int setup_arg_pages(struct linux_binprm *bprm, if (stack_base > STACK_SIZE_MAX) stack_base = STACK_SIZE_MAX; + /* Add space for stack randomization. */ + stack_base += (STACK_RND_MASK << PAGE_SHIFT); + /* Make sure we didn't let the argument array grow too large. */ if (vma->vm_end - vma->vm_start > stack_base) return -ENOMEM; |