diff options
Diffstat (limited to 'mm/mprotect.c')
| -rw-r--r-- | mm/mprotect.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/mm/mprotect.c b/mm/mprotect.c index 883e2cc85cad..e552f5e0ccbd 100644 --- a/mm/mprotect.c +++ b/mm/mprotect.c @@ -563,7 +563,7 @@ static int do_mprotect_pkey(unsigned long start, size_t len, error = -ENOMEM; if (!vma) goto out; - prev = vma->vm_prev; + if (unlikely(grows & PROT_GROWSDOWN)) { if (vma->vm_start >= end) goto out; @@ -581,8 +581,11 @@ static int do_mprotect_pkey(unsigned long start, size_t len, goto out; } } + if (start > vma->vm_start) prev = vma; + else + prev = vma->vm_prev; for (nstart = start ; ; ) { unsigned long mask_off_old_flags; |