* Re: [IMA] Re: possible deadlock in get_user_pages_unlocked (2)
[not found] ` <20190610190622.GI63833@gmail.com>
@ 2019-06-23 22:16 ` Eric Biggers
0 siblings, 0 replies; only message in thread
From: Eric Biggers @ 2019-06-23 22:16 UTC (permalink / raw)
To: syzbot; +Cc: Mimi Zohar, linux-integrity, syzkaller-bugs
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
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