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Fri, 27 Mar 2026 09:15:16 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id pHIJO6RKxmkIEQAAD6G6ig (envelope-from ); Fri, 27 Mar 2026 09:15:16 +0000 Date: Fri, 27 Mar 2026 09:15:15 +0000 From: Pedro Falcato To: "Lorenzo Stoakes (Oracle)" Cc: Andrew Morton , "Liam R . Howlett" , Vlastimil Babka , Jann Horn , Jeff Xu , David Hildenbrand , linux-mm@kvack.org, linux-kernel@vger.kernel.org, antonius Subject: Re: [PATCH mm-hotfixes] mm/mseal: update VMA end correctly on merge Message-ID: References: <20260327090640.146308-1-ljs@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260327090640.146308-1-ljs@kernel.org> X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 88E76A0019 X-Stat-Signature: zokhfwqefugq798qaureffutxow7dyjb X-HE-Tag: 1774602919-330728 X-HE-Meta: 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 eBy1tn7t USBKvkVOvFgKowZ+gVWuUrDsVPmF+qs3goEifti8NPqUziPVOTGs+0GVjS8IaSRKp7gyKyWe/wl31UlFw6DxgTEEh7DzwkHL4xOBz+6iK2IBYhGZ+Y3jMpj9zxwKFSO49bRBOK8JA0cYB8BtuMgtjkVTR1ZF2zA2yLVPLgdVBXLuPFnUwhTlcCuJe6LULlfCbaeYhQlIz60R13/5O6ozH8u2dVJlP282DnmzGSuuaS0re0pazQcw2fJb6QiHJNoWj6IbR5SY8/jBD4IJG7can5jDQgDUwU773A6kwyk8QKYdo4fVpE8RmHNeUU2M3BOAr4E9W9iv4cV+Bvf6/TU5LiYy3H0Y3GqN6ahmYI+Md5ep8jXosvkMHewqYYssytTKExWW0H1O+XTK0XvFT6Medto5woA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Mar 27, 2026 at 09:06:40AM +0000, Lorenzo Stoakes (Oracle) wrote: > Previously we stored the end of the current VMA in curr_end, and then upon > iterating to the next VMA updated curr_start to curr_end to advance to the > next VMA. > > However, this doesn't take into account the fact that a VMA might be > updated due to a merge by vma_modify_flags(), which can result in curr_end > being stale and thus, upon setting curr_start to curr_end, ending up with > an incorrect curr_start on the next iteration. > > Resolve the issue by setting curr_end to vma->vm_end unconditionally to > ensure this value remains updated should this occur. > > Signed-off-by: Lorenzo Stoakes (Oracle) > Fixes: 6c2da14ae1e0 ("mm/mseal: rework mseal apply logic") > Cc: > Reported-by: Antonius > Closes: https://lore.kernel.org/linux-mm/CAK8a0jyHXqBpt8Xe8v9SNDbnRiwz7OthA8SKY=NLRY7smPEP3Q@mail.gmail.com/ Reviewed-by: Pedro Falcato -- Pedro