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Thu, 29 Jun 2023 06:57:00 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 75660C433C0; Thu, 29 Jun 2023 06:56:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1688021819; bh=80x9r4LA4LA8BeaDnMdX/U9titGstiwY3o42Eq8vAJ4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=sAkj89fiv0JOyNbijWqEAiU7v1mL0pOvHud315hdN241vw4P9f6eupO0S66jWQXa7 l698FZJlYwlLqG3KheHBQZp46gaAUmCQtAX+H3/iFM98oIJQbGLp6a2ORMtuNXvfOy AnF2JXdy60njlCN5CZ8QIaClf9LXSNzIoKHEJgPg= Date: Thu, 29 Jun 2023 08:56:57 +0200 From: Greg KH To: liujf628995 Cc: catalin.marinas@arm.com, akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, syzkaller@googlegroups.com, security@kernel.org, secalert@redhat.com Subject: Re: use-after-free in =?utf-8?Q?kmemleak?= =?utf-8?B?X3NjYW7vvJ8=?= Message-ID: <2023062958-twistable-rut-e684@gregkh> References: <59a9e693.270f.1890529db99.Coremail.liujf628995@126.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <59a9e693.270f.1890529db99.Coremail.liujf628995@126.com> X-Rspamd-Queue-Id: 5D92416001E X-Rspam-User: X-Rspamd-Server: rspam02 X-Stat-Signature: 66c8gj43m6e64xogpcofw1u7xgoprqgu X-HE-Tag: 1688021821-529324 X-HE-Meta: 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 adQeCGDd G6m+8UWTq5m5AheuvPoI9aIX8iNqhYPctdA62czIoz+nrrk/EznLkOoTKd2JGoRPS/M94WApZyoYXrmxcdXOQOcs3sBCaCJ6IEmn/3/6SwTb6UBIhFITI04OWrIXQXFkypi3m5uF+fDEQ1wI+TTiUbPKG+oQH5Olhm9fsn8E7LXoYUYRdepaqLuqcEpPhfjrJ6/VeEytiOyK8uDCug/CpDXCOFzq+4g+K7XQNZJpLEE2Qizu4UWxLz64b595uiFCkNzWedTPix2XRx/oDJwfQKq7f+wvXgMxKI5kdCntgGM7Tq7YVuInF+wgfVkU9qeAZgJEUBBspS0OifCnx5XUWnRWhtkLo9phCCjSbpAbHShYzyJcnq8xd7LGp+CLvB840xHDC X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Jun 29, 2023 at 11:19:36AM +0800, liujf628995 wrote: > hello,here is a crash from syzkaller,it looks like happened in kmemleak scan.It could not be reproduced by syzkaller because this should not have been caused by syscall fuzz.I don't know what rhe reason for this，please check it.My fuzzed linux kernel is linux-6.2（commit/c9c3395d5e3dcc6daee66c6908354d47bf98cb0c） If you have a reproducer or a patch, we will be glad to review it, otherwise just sending syzbot reports like this (especially in html format which is rejected by the mailing lists), will not go very far as we have loads of them already. thanks, greg k-h