lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20190801184244.3169074-4-songliubraving@fb.com>
Date:   Thu, 1 Aug 2019 11:42:40 -0700
From:   Song Liu <songliubraving@...com>
To:     <linux-mm@...ck.org>, <linux-fsdevel@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <matthew.wilcox@...cle.com>, <kirill.shutemov@...ux.intel.com>,
        <kernel-team@...com>, <william.kucharski@...cle.com>,
        <akpm@...ux-foundation.org>, <hdanton@...a.com>,
        Song Liu <songliubraving@...com>
Subject: [PATCH v10 3/7] filemap: update offset check in filemap_fault()

With THP, current check of offset:

    VM_BUG_ON_PAGE(page->index != offset, page);

is no longer accurate. Update it to:

    VM_BUG_ON_PAGE(page_to_pgoff(page) != offset, page);

Acked-by: Rik van Riel <riel@...riel.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Acked-by: Johannes Weiner <hannes@...xchg.org>
Signed-off-by: Song Liu <songliubraving@...com>
---
 mm/filemap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index aaee1ef96f6d..97c7b7b92c20 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2542,7 +2542,7 @@ vm_fault_t filemap_fault(struct vm_fault *vmf)
 		put_page(page);
 		goto retry_find;
 	}
-	VM_BUG_ON_PAGE(page->index != offset, page);
+	VM_BUG_ON_PAGE(page_to_pgoff(page) != offset, page);
 
 	/*
 	 * We have a locked page in the page cache, now we need to check
-- 
2.17.1

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ