+ mm-gup-fix-potential-pgmap-refcnt-leak-in-__gup_device_huge-fix-fix.patch added to -mm tree

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



The patch titled
     Subject: mm-gup-fix-potential-pgmap-refcnt-leak-in-__gup_device_huge-fix-fix
has been added to the -mm tree.  Its filename is
     mm-gup-fix-potential-pgmap-refcnt-leak-in-__gup_device_huge-fix-fix.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-gup-fix-potential-pgmap-refcnt-leak-in-__gup_device_huge-fix-fix.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-gup-fix-potential-pgmap-refcnt-leak-in-__gup_device_huge-fix-fix.patch

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next and is updated
there every 3-4 working days

------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: mm-gup-fix-potential-pgmap-refcnt-leak-in-__gup_device_huge-fix-fix

fix return value

Cc: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>
Cc: Jan Kara <jack@xxxxxxx>
Cc: John Hubbard <jhubbard@xxxxxxxxxx>
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 mm/gup.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/mm/gup.c~mm-gup-fix-potential-pgmap-refcnt-leak-in-__gup_device_huge-fix-fix
+++ a/mm/gup.c
@@ -2240,6 +2240,7 @@ static int __gup_device_huge(unsigned lo
 {
 	int nr_start = *nr;
 	struct dev_pagemap *pgmap = NULL;
+	int ret = 1;
 
 	do {
 		struct page *page = pfn_to_page(pfn);
@@ -2247,12 +2248,14 @@ static int __gup_device_huge(unsigned lo
 		pgmap = get_dev_pagemap(pfn, pgmap);
 		if (unlikely(!pgmap)) {
 			undo_dev_pagemap(nr, nr_start, flags, pages);
+			ret = 0;
 			break;
 		}
 		SetPageReferenced(page);
 		pages[*nr] = page;
 		if (unlikely(!try_grab_page(page, flags))) {
 			undo_dev_pagemap(nr, nr_start, flags, pages);
+			ret = 0;
 			break;
 		}
 		(*nr)++;
@@ -2260,7 +2263,7 @@ static int __gup_device_huge(unsigned lo
 	} while (addr += PAGE_SIZE, addr != end);
 
 	put_dev_pagemap(pgmap);
-	return 1;
+	return ret;
 }
 
 static int __gup_device_huge_pmd(pmd_t orig, pmd_t *pmdp, unsigned long addr,
_

Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are

mm.patch
mm-gup-fix-potential-pgmap-refcnt-leak-in-__gup_device_huge-fix.patch
mm-gup-fix-potential-pgmap-refcnt-leak-in-__gup_device_huge-fix-fix.patch
lazy-tlb-allow-lazy-tlb-mm-refcounting-to-be-configurable-fix.patch
mm-compaction-optimize-proactive-compaction-deferrals-fix.patch
mm-compaction-support-triggering-of-proactive-compaction-by-user-fix.patch
mm-mempolicy-convert-from-atomic_t-to-refcount_t-on-mempolicy-refcnt-fix.patch
mm-damon-implement-primitives-for-the-virtual-memory-address-spaces-fix.patch
mm-damon-implement-a-debugfs-based-user-space-interface-fix.patch
mm-damon-implement-a-debugfs-based-user-space-interface-fix-fix.patch
fs-epoll-use-a-per-cpu-counter-for-users-watches-count-fix-fix.patch
log-if-a-core-dump-is-aborted-due-to-changed-file-permissions-fix.patch
linux-next-rejects.patch
linux-next-git-rejects.patch
kernel-forkc-export-kernel_thread-to-modules.patch




[Index of Archives]     [Kernel Archive]     [IETF Annouce]     [DCCP]     [Netdev]     [Networking]     [Security]     [Bugtraq]     [Yosemite]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux SCSI]

  Powered by Linux