* [PATCH] bugfix in memory.c
@ 2001-07-29 10:10 velizarb
0 siblings, 0 replies; only message in thread
From: velizarb @ 2001-07-29 10:10 UTC (permalink / raw)
To: Linux Kernel mailing list
The following is a bugfix against memory.c:lock_kiovec,
At line 649 we have:
if (!PageLocked(page)) {
which assumes page is the page we failed to lock, and if it is unlocked after calling
the unlock_kiovec we have a page which has been mapped twice, but page has been modified
and it doesn't contain the expected value.
Patch is against 2.4.8-pre1, Comments are welcome.
--
--- memory.c.old Sun Jul 29 12:38:19 2001
+++ memory.c Sun Jul 29 12:39:04 2001
@@ -619,9 +619,10 @@
if (TryLockPage(page)) {
while (j--) {
- page = *(--ppage);
- if (page)
- UnlockPage(page);
+ struct page *tmp;
+ tmp = *(--ppage);
+ if (tmp)
+ UnlockPage(tmp);
}
goto retry;
}
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