Message ID | 20240820235730.2852400-2-Liam.Howlett@oracle.com (mailing list archive) |
---|---|
State | New |
Headers | show
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Howlett" <Liam.Howlett@oracle.com> To: Andrew Morton <akpm@linux-foundation.org> Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Suren Baghdasaryan <surenb@google.com>, Lorenzo Stoakes <lorenzo.stoakes@oracle.com>, Matthew Wilcox <willy@infradead.org>, Vlastimil Babka <vbabka@suse.cz>, sidhartha.kumar@oracle.com, Bert Karwatzki <spasswolf@web.de>, Jiri Olsa <olsajiri@gmail.com>, Kees Cook <kees@kernel.org>, "Paul E . McKenney" <paulmck@kernel.org>, "Liam R. Howlett" <Liam.Howlett@Oracle.com>, Lorenzo Stoakes <lstoakes@gmail.com> Subject: [PATCH v6 01/20] mm/vma: Correctly position vma_iterator in __split_vma() Date: Tue, 20 Aug 2024 19:57:10 -0400 Message-ID: <20240820235730.2852400-2-Liam.Howlett@oracle.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240820235730.2852400-1-Liam.Howlett@oracle.com> References: <20240820235730.2852400-1-Liam.Howlett@oracle.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: YT4PR01CA0112.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:d7::11) To DS0PR10MB7933.namprd10.prod.outlook.com (2603:10b6:8:1b8::15) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS0PR10MB7933:EE_|PH0PR10MB7099:EE_ X-MS-Office365-Filtering-Correlation-Id: 353a9446-2b49-4b15-6eea-08dcc173e5a2 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|7416014|376014; X-Microsoft-Antispam-Message-Info: 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Avoid MAP_FIXED gap exposure
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diff --git a/mm/vma.c b/mm/vma.c index 5850f7c0949b..066de79b7b73 100644 --- a/mm/vma.c +++ b/mm/vma.c @@ -177,7 +177,7 @@ void unmap_region(struct mm_struct *mm, struct ma_state *mas, /* * __split_vma() bypasses sysctl_max_map_count checking. We use this where it * has already been checked or doesn't make sense to fail. - * VMA Iterator will point to the end VMA. + * VMA Iterator will point to the original VMA. */ static int __split_vma(struct vma_iterator *vmi, struct vm_area_struct *vma, unsigned long addr, int new_below) @@ -246,6 +246,9 @@ static int __split_vma(struct vma_iterator *vmi, struct vm_area_struct *vma, /* Success. */ if (new_below) vma_next(vmi); + else + vma_prev(vmi); + return 0; out_free_mpol: