linux-kernel - Re: KMSAN: uninit-value in udf_evict

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Date:   Fri, 25 Sep 2020 12:33:15 +0200
From:   Jan Kara <jack@...e.cz>
To:     syzbot <syzbot+91f02b28f9bb5f5f1341@...kaller.appspotmail.com>
Cc:     glider@...gle.com, jack@...e.com, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: KMSAN: uninit-value in udf_evict_inode

On Thu 24-09-20 22:18:21, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    c5a13b33 kmsan: clang-format core
> git tree:       https://github.com/google/kmsan.git master
> console output: https://syzkaller.appspot.com/x/log.txt?x=142cf809900000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=20f149ad694ba4be
> dashboard link: https://syzkaller.appspot.com/bug?extid=91f02b28f9bb5f5f1341
> compiler:       clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81)
> userspace arch: i386
> 
> 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+91f02b28f9bb5f5f1341@...kaller.appspotmail.com
> 
> UDF-fs: warning (device loop3): udf_load_vrs: No anchor found
> UDF-fs: Scanning with blocksize 512 failed
> UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000)
> UDF-fs: error (device loop3): udf_read_inode: (ino 1328) failed !bh
> =====================================================
> BUG: KMSAN: uninit-value in udf_evict_inode+0x382/0x7d0 fs/udf/inode.c:150

Yeah, easy enough. I'll send a fix.

								Honza
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR