From: Michal Hocko <mhocko@kernel.org> To: Dan Carpenter <dan.carpenter@oracle.com> Cc: Andrew Morton <akpm@linux-foundation.org>, Mike Kravetz <mike.kravetz@oracle.com>, "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>, Jan Kara <jack@suse.cz>, Ross Zwisler <ross.zwisler@linux.intel.com>, Lorenzo Stoakes <lstoakes@gmail.com>, "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>, Dan Williams <dan.j.williams@intel.com>, linux-mm@kvack.org, kernel-janitors@vger.kernel.org Subject: Re: [patch linux-next] userfaultfd: hugetlbfs: unmap the correct pointer Date: Thu, 12 Jan 2017 19:33:27 +0000 [thread overview] Message-ID: <20170112193327.GB8558@dhcp22.suse.cz> (raw) In-Reply-To: <20170112192052.GB12157@mwanda> On Thu 12-01-17 22:20:52, Dan Carpenter wrote: > kunmap_atomic() and kunmap() take different pointers. People often get > these mixed up. > > Fixes: 16374db2e9a0 ("userfaultfd: hugetlbfs: fix __mcopy_atomic_hugetlb retry/error processing") This looks like a linux-next sha1. This is not stable and will change... > Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> > > diff --git a/mm/memory.c b/mm/memory.c > index 6012a05..dfd3604 100644 > --- a/mm/memory.c > +++ b/mm/memory.c > @@ -4172,7 +4172,7 @@ long copy_huge_page_from_user(struct page *dst_page, > (const void __user *)(src + i * PAGE_SIZE), > PAGE_SIZE); > if (allow_pagefault) > - kunmap(page_kaddr); > + kunmap(dst_page + 1); I guess you meant dst_page + i > else > kunmap_atomic(page_kaddr); > -- Michal Hocko SUSE Labs
WARNING: multiple messages have this Message-ID (diff)
From: Michal Hocko <mhocko@kernel.org> To: Dan Carpenter <dan.carpenter@oracle.com> Cc: Andrew Morton <akpm@linux-foundation.org>, Mike Kravetz <mike.kravetz@oracle.com>, "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>, Jan Kara <jack@suse.cz>, Ross Zwisler <ross.zwisler@linux.intel.com>, Lorenzo Stoakes <lstoakes@gmail.com>, "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>, Dan Williams <dan.j.williams@intel.com>, linux-mm@kvack.org, kernel-janitors@vger.kernel.org Subject: Re: [patch linux-next] userfaultfd: hugetlbfs: unmap the correct pointer Date: Thu, 12 Jan 2017 20:33:27 +0100 [thread overview] Message-ID: <20170112193327.GB8558@dhcp22.suse.cz> (raw) In-Reply-To: <20170112192052.GB12157@mwanda> On Thu 12-01-17 22:20:52, Dan Carpenter wrote: > kunmap_atomic() and kunmap() take different pointers. People often get > these mixed up. > > Fixes: 16374db2e9a0 ("userfaultfd: hugetlbfs: fix __mcopy_atomic_hugetlb retry/error processing") This looks like a linux-next sha1. This is not stable and will change... > Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> > > diff --git a/mm/memory.c b/mm/memory.c > index 6012a05..dfd3604 100644 > --- a/mm/memory.c > +++ b/mm/memory.c > @@ -4172,7 +4172,7 @@ long copy_huge_page_from_user(struct page *dst_page, > (const void __user *)(src + i * PAGE_SIZE), > PAGE_SIZE); > if (allow_pagefault) > - kunmap(page_kaddr); > + kunmap(dst_page + 1); I guess you meant dst_page + i > else > kunmap_atomic(page_kaddr); > -- Michal Hocko SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2017-01-12 19:33 UTC|newest] Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-01-12 19:20 [patch linux-next] userfaultfd: hugetlbfs: unmap the correct pointer Dan Carpenter 2017-01-12 19:20 ` Dan Carpenter 2017-01-12 19:33 ` Michal Hocko [this message] 2017-01-12 19:33 ` Michal Hocko 2017-01-13 8:16 ` Dan Carpenter 2017-01-13 8:16 ` Dan Carpenter 2017-01-13 8:26 ` Michal Hocko 2017-01-13 8:26 ` Michal Hocko 2017-01-13 8:40 ` Dan Carpenter 2017-01-13 8:40 ` Dan Carpenter 2017-01-13 8:26 ` [patch v2 " Dan Carpenter 2017-01-13 8:26 ` Dan Carpenter 2017-01-13 8:40 ` Michal Hocko 2017-01-13 8:40 ` Michal Hocko 2017-01-13 16:29 ` Mike Kravetz 2017-01-13 16:29 ` Mike Kravetz 2017-01-14 0:02 ` Hugh Dickins 2017-01-14 0:02 ` Hugh Dickins 2017-01-14 0:13 ` Andrew Morton 2017-01-14 0:13 ` Andrew Morton 2017-01-14 6:56 ` Dan Carpenter 2017-01-14 6:56 ` Dan Carpenter 2017-01-14 6:55 ` Dan Carpenter 2017-01-14 6:55 ` Dan Carpenter
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