Re: "BUG: kernel NULL pointer dereference," when unmounting filesystem hitted by enospc error

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On 27/10/2019 14:24, Su Yue wrote:
[...]
> 
> Interesting thing I met too. That's not reproducible on my VM but
> host (Archlinux v5.3.6 same kernel config).
> 
> What's more interesting is that v5.3.7 seems to have fixed the bug.
> After some bisect. The commit is
> 
> commit 417d26300214f7b593a99c6bc8badb66492ae322
> Author: Qu Wenruo <wqu@xxxxxxxx>
> Date:   Mon Sep 23 14:56:14 2019 +0800
> 
>     btrfs: relocation: fix use-after-free on dead relocation roots
> 
>     commit 1fac4a54374f7ef385938f3c6cf7649c0fe4f6cd upstream.
> 

Good catch, cherry-picking this commit on top of v5.3.5 resolves the
issue in my setup.

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Johannes Thumshirn                            SUSE Labs Filesystems
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