* [PATCH] mmap: EINVAL not ENOMEM when rejecting VM_GROWS
@ 2012-03-06 20:28 Hugh Dickins
0 siblings, 0 replies; only message in thread
From: Hugh Dickins @ 2012-03-06 20:28 UTC (permalink / raw)
To: Linus Torvalds; +Cc: Al Viro, Andrew Morton, linux-kernel, linux-mm
Currently error is -ENOMEM when rejecting VM_GROWSDOWN|VM_GROWSUP
from shared anonymous: hoist the file case's -EINVAL up for both.
Signed-off-by: Hugh Dickins <hughd@google.com>
---
mm/mmap.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- 3.3.0-rc6+/mm/mmap.c 2012-03-05 16:38:23.741975593 -0800
+++ linux/mm/mmap.c 2012-03-06 12:14:32.704674576 -0800
@@ -1266,8 +1266,9 @@ munmap_back:
vma->vm_pgoff = pgoff;
INIT_LIST_HEAD(&vma->anon_vma_chain);
+ error = -EINVAL; /* when rejecting VM_GROWSDOWN|VM_GROWSUP */
+
if (file) {
- error = -EINVAL;
if (vm_flags & (VM_GROWSDOWN|VM_GROWSUP))
goto free_vma;
if (vm_flags & VM_DENYWRITE) {
--
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