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Tue, 08 Mar 2022 10:12:30 -0800 (PST) Received: from [192.168.1.11] ([94.103.229.107]) by smtp.gmail.com with ESMTPSA id bt23-20020a056512261700b00443e7fa1c26sm3609793lfb.261.2022.03.08.10.12.29 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 08 Mar 2022 10:12:30 -0800 (PST) Content-Type: multipart/mixed; boundary="------------0kTuiRdFeR90XioQw3UoZwvE" Message-ID: Date: Tue, 8 Mar 2022 21:12:28 +0300 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.6.1 Subject: Re: [syzbot] KASAN: use-after-free Read in port100_send_complete Content-Language: en-US To: syzbot , krzysztof.kozlowski@canonical.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <000000000000cb6dd805d9b8cbb8@google.com> From: Pavel Skripkin In-Reply-To: <000000000000cb6dd805d9b8cbb8@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is a multi-part message in MIME format. --------------0kTuiRdFeR90XioQw3UoZwvE Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 3/8/22 21:03, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 38f80f42147f MAINTAINERS: Remove dead patchwork link > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=14b0d321700000 > kernel config: https://syzkaller.appspot.com/x/.config?x=542b2708133cc492 > dashboard link: https://syzkaller.appspot.com/bug?extid=16bcb127fb73baeecb14 > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14a63d21700000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17d21be1700000 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+16bcb127fb73baeecb14@syzkaller.appspotmail.com > > port100 5-1:0.0: NFC: Urb failure (status -71) > ================================================================== > BUG: KASAN: use-after-free in port100_send_complete+0x16e/0x1a0 drivers/nfc/port100.c:935 > Read of size 1 at addr ffff88801bb59540 by task ksoftirqd/2/26 We need to kill urbs on disconnect, since urbs callbacks they may access freed memory #syz test git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master With regards, Pavel Skripkin --------------0kTuiRdFeR90XioQw3UoZwvE Content-Type: text/plain; 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