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| author | David S. Miller <davem@davemloft.net> | 2010-02-20 13:53:16 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-20 13:53:16 -0800 |
| commit | 198d2f63a6096fe575b696b13ba61b62c620266f (patch) | |
| tree | d0c2b0697370cc670029cd1eb2a80c35c71eac60 /fs/exec.c | |
| parent | 0da2b300b91ddeb9944c3fb4faaf78c1c482c0af (diff) | |
| parent | 1f474646fdc36b457606bbcd6a3592e6cbd31ac4 (diff) | |
| download | kernel-crypto-198d2f63a6096fe575b696b13ba61b62c620266f.tar.gz kernel-crypto-198d2f63a6096fe575b696b13ba61b62c620266f.tar.xz kernel-crypto-198d2f63a6096fe575b696b13ba61b62c620266f.zip | |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
Diffstat (limited to 'fs/exec.c')
| -rw-r--r-- | fs/exec.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/fs/exec.c b/fs/exec.c index 0790a107ff7..e95c692ef0e 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -571,6 +571,9 @@ int setup_arg_pages(struct linux_binprm *bprm, struct vm_area_struct *prev = NULL; unsigned long vm_flags; unsigned long stack_base; + unsigned long stack_size; + unsigned long stack_expand; + unsigned long rlim_stack; #ifdef CONFIG_STACK_GROWSUP /* Limit stack size to 1GB */ @@ -627,10 +630,24 @@ int setup_arg_pages(struct linux_binprm *bprm, goto out_unlock; } + stack_expand = EXTRA_STACK_VM_PAGES * PAGE_SIZE; + stack_size = vma->vm_end - vma->vm_start; + /* + * Align this down to a page boundary as expand_stack + * will align it up. + */ + rlim_stack = rlimit(RLIMIT_STACK) & PAGE_MASK; + rlim_stack = min(rlim_stack, stack_size); #ifdef CONFIG_STACK_GROWSUP - stack_base = vma->vm_end + EXTRA_STACK_VM_PAGES * PAGE_SIZE; + if (stack_size + stack_expand > rlim_stack) + stack_base = vma->vm_start + rlim_stack; + else + stack_base = vma->vm_end + stack_expand; #else - stack_base = vma->vm_start - EXTRA_STACK_VM_PAGES * PAGE_SIZE; + if (stack_size + stack_expand > rlim_stack) + stack_base = vma->vm_end - rlim_stack; + else + stack_base = vma->vm_start - stack_expand; #endif ret = expand_stack(vma, stack_base); if (ret) |