From: Eric Biggers <ebiggers@kernel.org>
To: syzbot <syzbot+e1374b2ec8f6a25ab2e5@syzkaller.appspotmail.com>
Cc: Mimi Zohar <zohar@linux.ibm.com>,
linux-integrity@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [IMA] Re: possible deadlock in get_user_pages_unlocked (2)
Date: Sun, 23 Jun 2019 15:16:50 -0700 [thread overview]
Message-ID: <20190623221650.GE772@sol.localdomain> (raw)
In-Reply-To: <20190610190622.GI63833@gmail.com>
On Mon, Jun 10, 2019 at 12:06:23PM -0700, Eric Biggers wrote:
> On Tue, Jun 04, 2019 at 06:16:00PM -0700, syzbot wrote:
> > syzbot has bisected this bug to:
> >
> > commit 69d61f577d147b396be0991b2ac6f65057f7d445
> > Author: Mimi Zohar <zohar@linux.ibm.com>
> > Date: Wed Apr 3 21:47:46 2019 +0000
> >
> > ima: verify mprotect change is consistent with mmap policy
> >
> > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1055a2f2a00000
> > start commit: 56b697c6 Add linux-next specific files for 20190604
> > git tree: linux-next
> > final crash: https://syzkaller.appspot.com/x/report.txt?x=1255a2f2a00000
> > console output: https://syzkaller.appspot.com/x/log.txt?x=1455a2f2a00000
> > kernel config: https://syzkaller.appspot.com/x/.config?x=4248d6bc70076f7d
> > dashboard link: https://syzkaller.appspot.com/bug?extid=e1374b2ec8f6a25ab2e5
> > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=165757eea00000
> > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10dd3e86a00000
> >
> > Reported-by: syzbot+e1374b2ec8f6a25ab2e5@syzkaller.appspotmail.com
> > Fixes: 69d61f577d14 ("ima: verify mprotect change is consistent with mmap
> > policy")
> >
> > For information about bisection process see: https://goo.gl/tpsmEJ#bisection
> >
>
> Hi Mimi, it seems your change to call ima_file_mmap() from
> security_file_mprotect() violates the locking order by taking i_rwsem while
> mmap_sem is held.
>
> - Eric
This patch was dropped from linux-next, so let's invalidate the bug report.
#syz invalid
- Eric
parent reply other threads:[~2019-06-24 1:52 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20190610190622.GI63833@gmail.com>]
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=20190623221650.GE772@sol.localdomain \
--to=ebiggers@kernel.org \
--cc=linux-integrity@vger.kernel.org \
--cc=syzbot+e1374b2ec8f6a25ab2e5@syzkaller.appspotmail.com \
--cc=syzkaller-bugs@googlegroups.com \
--cc=zohar@linux.ibm.com \
/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