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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=nQymcUIFYias8gCT71HYL6ML7ZvTT1Jm9pVu9Eri+4I=; b=F+Dec8sZUZmpDVCdqWhWdJdWUicsnkO/RvGp9t3m6CSHToSJ4CIApZdPhPzGpmJpUh AGQqMDFPIfVtgYzgKGpm7rKRouSL9zDoaeAKkOPgVDMLWB21YTynfUznnbKyoGHKHgXL P5ny24u6I565zu5Q/p2KaQlj5VfJepZRh0sSbbfa1Ea7tEM5HqE3qm1zb9r/T+QcID4y K1MFHk5waRARUpXwDFOFzn28yW64xOSkgCWuZKO6N3AdHJtsnccQIjyhmgiWUAxG96Wh gEHPXU9yMGpQS2u74nVJG5hQoIFAhp567TCRkdBC3/bOh37Ar72pyDCLTrc7DGRXV3A4 Id0g== X-Gm-Message-State: AOAM531nv+26ddHYDzBSoP1VgJMhU720jbU2L2rNWZabuSV0kKEJhXNQ RWR4F+cbrqtN1R0BpCCHv8QREOvuwUaU7wGGaQvBAAnsptNn X-Google-Smtp-Source: ABdhPJxYFXn/qXiKcwCG+2wJepq4EIpagF1BGYLUytmXoy7n1TGaADpttBHAHpNrDhuSufi1cnYq1zSXAwLSv2jaqWsLZUyQm4Wg MIME-Version: 1.0 X-Received: by 2002:a05:6638:2047:: with SMTP id t7mr15580860jaj.134.1614603367762; Mon, 01 Mar 2021 04:56:07 -0800 (PST) Date: Mon, 01 Mar 2021 04:56:07 -0800 In-Reply-To: <0000000000002525c205b604547a@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000030504905bc792423@google.com> Subject: Re: KASAN: null-ptr-deref Write in bdi_put From: syzbot To: aik@ozlabs.ru, akpm@linux-foundation.org, axboe@kernel.dk, hch@lst.de, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mingo@kernel.org, mingo@redhat.com, peterz@infradead.org, rostedt@goodmis.org, syzkaller-bugs@googlegroups.com, will@kernel.org Content-Type: text/plain; charset="UTF-8" X-Stat-Signature: ebgxu3y9co85sn3f5ftpo4kzsh766zm1 X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 1F6FF80192E1 Received-SPF: none (m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com>: No applicable sender policy available) receiver=imf27; identity=mailfrom; envelope-from="<3Z-Q8YAkbACwaghSITTMZIXXQL.OWWOTMcaMZKWVbMVb.KWU@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com>"; helo=mail-io1-f70.google.com; client-ip=209.85.166.70 X-HE-DKIM-Result: none/none X-HE-Tag: 1614603359-590448 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: syzbot suspects this issue was fixed by commit: commit 2d2f6f1b4799428d160c021dd652bc3e3593945e Author: Christoph Hellwig Date: Thu Jan 7 18:36:40 2021 +0000 block: pre-initialize struct block_device in bdev_alloc_inode bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1424a5b6d00000 start commit: 71c061d2 Merge tag 'for-5.11-rc2-tag' of git://git.kernel... git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=33b7f56c5bf0f684 dashboard link: https://syzkaller.appspot.com/bug?extid=aded2f2ab94d81727898 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=143f7fc0d00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1089023f500000 If the result looks correct, please mark the issue as fixed by replying with: #syz fix: block: pre-initialize struct block_device in bdev_alloc_inode For information about bisection process see: https://goo.gl/tpsmEJ#bisection