From: Andrey Ryabinin <ryabinin.a.a@gmail.com>
To: Dmitry Vyukov <dvyukov@google.com>
Cc: Tejun Heo <tj@kernel.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
syzkaller <syzkaller@googlegroups.com>,
Kostya Serebryany <kcc@google.com>,
Alexander Potapenko <glider@google.com>
Subject: Re: fs: GPF in locked_inode_to_wb_and_lock_list
Date: Thu, 21 Apr 2016 12:45:21 +0300 [thread overview]
Message-ID: <CAPAsAGzD1tk-zi+Khu-e3=8=vQL8e4huZmd1pRKVJ7gm0n6ajA@mail.gmail.com> (raw)
In-Reply-To: <CACT4Y+arruy73K7kATxByuGqJKr=vfmOGqxiQAVgLaJ3DZsV9g@mail.gmail.com>
2016-04-21 11:35 GMT+03:00 Dmitry Vyukov <dvyukov@google.com>:
>
> ffffffff818884dd: 48 8b 03 mov (%rbx),%rax
>
> So whatever load "&wb->bdi->wb" produces is a NULL deref. (is it wb
> that is NULL?)
Yes it's NULL wb, because there is only one load:
mov (%rbx),%rax => rax = wb->bdi
add $0x50,%rax => rax = &bdi->wb
next prev parent reply other threads:[~2016-04-21 9:45 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-18 9:44 fs: GPF in locked_inode_to_wb_and_lock_list Dmitry Vyukov
2016-04-20 21:14 ` Tejun Heo
2016-04-21 8:25 ` Dmitry Vyukov
2016-04-21 9:10 ` Andrey Ryabinin
2016-04-21 9:29 ` Dmitry Vyukov
2016-04-21 16:14 ` Tejun Heo
2016-04-21 8:35 ` Dmitry Vyukov
2016-04-21 9:45 ` Andrey Ryabinin [this message]
2016-04-21 10:00 ` Dmitry Vyukov
2016-04-21 17:06 ` Tejun Heo
2016-04-22 18:55 ` Dmitry Vyukov
2016-06-06 17:46 ` Dmitry Vyukov
2016-06-17 16:04 ` [PATCH] block: flush writeback dwork before detaching a bdev inode from it Tejun Heo
2016-06-20 13:31 ` Jan Kara
2016-06-20 13:38 ` Dmitry Vyukov
2016-06-20 17:40 ` Tejun Heo
2016-06-21 12:58 ` Dmitry Vyukov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='CAPAsAGzD1tk-zi+Khu-e3=8=vQL8e4huZmd1pRKVJ7gm0n6ajA@mail.gmail.com' \
--to=ryabinin.a.a@gmail.com \
--cc=dvyukov@google.com \
--cc=glider@google.com \
--cc=kcc@google.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=syzkaller@googlegroups.com \
--cc=tj@kernel.org \
--cc=viro@zeniv.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).