From: Nick Piggin <npiggin@suse.de>
Date: Wed, 14 Feb 2007 11:36:32 +0000 (+0100)
Subject: [PATCH] mincore: fill in results properly
X-Git-Tag: firefly_0821_release~31212
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4a76ef036ac415c28d1adbaf2b7a74040b84d4c2;p=firefly-linux-kernel-4.4.55.git

[PATCH] mincore: fill in results properly

Paper bag time. Thanks to Randy for noticing that I didn't actually assign
'present' to anything.

Unfortunately my original patch passed the few simple test cases I gave it,
purely by coincidence.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/mm/mincore.c b/mm/mincore.c
index 9780097e3812..9c1d0a426e95 100644
--- a/mm/mincore.c
+++ b/mm/mincore.c
@@ -125,6 +125,8 @@ static long do_mincore(unsigned long addr, unsigned char *vec, unsigned long pag
 #endif
 			}
 		}
+
+		vec[i] = present;
 	}
 	pte_unmap_unlock(ptep-1, ptl);
 
@@ -135,6 +137,9 @@ none_mapped:
 		pgoff = linear_page_index(vma, addr);
 		for (i = 0; i < nr; i++, pgoff++)
 			vec[i] = mincore_page(vma->vm_file->f_mapping, pgoff);
+	} else {
+		for (i = 0; i < nr; i++)
+			vec[i] = 0;
 	}
 
 	return nr;