X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fmm%2Fshmem.c;fp=kernel%2Fmm%2Fshmem.c;h=1b11ccc0a3b75ab5bd28aa401f2e0800870962c6;hb=52f993b8e89487ec9ee15a7fb4979e0f09a45b27;hp=ea5a70cfc1d828bb09cc236c91835fd090c3e875;hpb=c189ccac5702322ed843fe17057035b7222a59b6;p=kvmfornfv.git

diff --git a/kernel/mm/shmem.c b/kernel/mm/shmem.c
index ea5a70cfc..1b11ccc0a 100644
--- a/kernel/mm/shmem.c
+++ b/kernel/mm/shmem.c
@@ -2153,9 +2153,11 @@ static long shmem_fallocate(struct file *file, int mode, loff_t offset,
 									NULL);
 		if (error) {
 			/* Remove the !PageUptodate pages we added */
-			shmem_undo_range(inode,
-				(loff_t)start << PAGE_CACHE_SHIFT,
-				(loff_t)index << PAGE_CACHE_SHIFT, true);
+			if (index > start) {
+				shmem_undo_range(inode,
+				 (loff_t)start << PAGE_CACHE_SHIFT,
+				 ((loff_t)index << PAGE_CACHE_SHIFT) - 1, true);
+			}
 			goto undone;
 		}