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| author | Alex Shi <alex.shi@linaro.org> | 2018-02-01 12:03:41 +0800 |
|---|---|---|
| committer | Alex Shi <alex.shi@linaro.org> | 2018-02-01 12:03:41 +0800 |
| commit | 9cebd248bd83dea5ead3f1ab5f3cbaf241588e37 (patch) | |
| tree | 5f2d8fd7122c345045c476d57cb7c5ad17a4f08b /mm/mmap.c | |
| parent | 4f0ca2b2718d297c88b1c303f2d414327c537636 (diff) | |
| parent | 6c6f924f9c6294944ee6efb1bbd8cdb853582e50 (diff) | |
Merge tag 'v4.9.79' into linux-linaro-lsk-v4.9lsk-v4.9-18.02
This is the 4.9.79 stable release
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 5b48adb4aa56..45ac5b973459 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2240,7 +2240,8 @@ int expand_upwards(struct vm_area_struct *vma, unsigned long address) gap_addr = TASK_SIZE; next = vma->vm_next; - if (next && next->vm_start < gap_addr) { + if (next && next->vm_start < gap_addr && + (next->vm_flags & (VM_WRITE|VM_READ|VM_EXEC))) { if (!(next->vm_flags & VM_GROWSUP)) return -ENOMEM; /* Check that both stack segments have the same anon_vma? */ @@ -2324,7 +2325,8 @@ int expand_downwards(struct vm_area_struct *vma, if (gap_addr > address) return -ENOMEM; prev = vma->vm_prev; - if (prev && prev->vm_end > gap_addr) { + if (prev && prev->vm_end > gap_addr && + (prev->vm_flags & (VM_WRITE|VM_READ|VM_EXEC))) { if (!(prev->vm_flags & VM_GROWSDOWN)) return -ENOMEM; /* Check that both stack segments have the same anon_vma? */ |