linux-kernel - Re: Regression in longterm 4.19: f2fs: use generic EFSBADCRC/EFSCORRUPTED

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Message-ID: <20191013214440.GA20196@amd>
Date:   Sun, 13 Oct 2019 23:44:41 +0200
From:   Pavel Machek <pavel@....cz>
To:     Andrew Macks <andypoo@...il.com>, stable@...nel.org,
        Greg KH <greg@...ah.com>,
        kernel list <linux-kernel@...r.kernel.org>
Cc:     Chao Yu <yuchao0@...wei.com>, Jaegeuk Kim <jaegeuk@...nel.org>
Subject: Re: Regression in longterm 4.19: f2fs: use generic
 EFSBADCRC/EFSCORRUPTED

On Sat 2019-10-12 21:55:24, Andrew Macks wrote:
> Sorry for version typo in the previous message.
> 
> In addition to 4.19, the issue was also backported to 4.14 and 5.2.
> 
> 4.14, 4.19 and 5.2 are all missing the EINVAL fix from 5.3.

Ouch.

Well, when I seen the patch, I thought "looks like the bug is not
serious enough for -stable". I guess I should have spoken up.

Anyway, I guess we need to either revert  59a5cea41dd0a or backport
38fb6d0ea34299d97b too....

So I guess Greg and lists need to be cc-ed... and 

Thanks for the report and sorry for the trouble....

								Pavel


> Andrew.
> 
> On Sat, 12 Oct 2019 at 21:39, Andrew Macks <andypoo@...il.com> wrote:
> 
> > Hi - there is a nasty regression which was recently introduced into
> > longterm 4.19.76.
> >
> > 59a5cea41dd0ae706ab83f8ecd64199aadefb493 was committed to 4.19, however it
> > introduces a regression that filesystems no longer mount if do_mounts
> > iterates through them after F2FS.  This surfaced on one of my servers as
> > F2FS superblock check happens before btrfs mount is attempted.
> >
> > With this code, my server panicked after kernel upgrade as btrfs mount
> > wasn't attempted.
> >
> > This issue has already been fixed in 5.3 with this patch in July, but it
> > was missed from the 4.19 backport.
> >
> > 38fb6d0ea34299d97b031ed64fe994158b6f8eb3
> > f2fs: use EINVAL for superblock with invalid magic
> >
> > Andypoo.
> >

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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