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Subject[f2fs bug] infinite loop in f2fs_get_meta_page_nofail()
[moved linux-fsdevel to Bcc]

On Wed, Oct 07, 2020 at 02:18:19AM -0700, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: a804ab08 Add linux-next specific files for 20201006
> git tree: linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=17fe30bf900000
> kernel config: https://syzkaller.appspot.com/x/.config?x=26c1b4cc4a62ccb
> dashboard link: https://syzkaller.appspot.com/bug?extid=ee250ac8137be41d7b13
> compiler: gcc (GCC) 10.1.0-syz 20200507
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1336413b900000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12f7392b900000
>
> The issue was bisected to:
>
> commit eede846af512572b1f30b34f9889d7df64c017d4
> Author: Jaegeuk Kim <jaegeuk@kernel.org>
> Date: Fri Oct 2 21:17:35 2020 +0000
>
> f2fs: f2fs_get_meta_page_nofail should not be failed
>

Jaegeuk, it looks like the loop you added in the above commit doesn't terminate
if the requested page is beyond the end of the device.

- Eric

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