Re: [syzbot] possible deadlock in blk_request_module
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From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Date: 2021-09-23 04:10:51
Hello, Jens. On 2021/09/23 9:52, syzbot wrote:
Hello, syzbot found the following issue on: HEAD commit: 93ff9f13be91 Merge tag 's390-5.15-3' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15d5b33d300000 kernel config: https://syzkaller.appspot.com/x/.config?x=6d93fe4341f98704 dashboard link: https://syzkaller.appspot.com/bug?extid=384fb45e189bf86b6bb9 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+384fb45e189bf86b6bb9@syzkaller.appspotmail.com
Will you pick up https://lkml.kernel.org/r/e205f13d-18ff-a49c-0988-7de6ea5ff823@i-love.sakura.ne.jp which avoids add_disk() with brd_devices_mutex held? Also, will you pick up https://lkml.kernel.org/r/692fdc1a-6396-dcf4-c700-2d822f161053@i-love.sakura.ne.jp which avoids double kfree() ?