From: Amir Goldstein <amir73il@gmail.com>
To: Mimi Zohar <zohar@linux.ibm.com>
Cc: syzbot <syzbot+b42fe626038981fb7bfa@syzkaller.appspotmail.com>,
hdanton@sina.com, linux-fsdevel@vger.kernel.org,
linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, linux-unionfs@vger.kernel.org,
miklos@szeredi.hu, mszeredi@redhat.com,
syzbot@syzkalhler.appspotmail.com,
syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk
Subject: Re: [syzbot] [integrity] [overlayfs] possible deadlock in mnt_want_write (2)
Date: Thu, 5 Oct 2023 16:22:20 +0300 [thread overview]
Message-ID: <CAOQ4uxgfJ4owqzh99t65MyT5A99BbwkLQ-sHumCUWyqSw-Rd5g@mail.gmail.com> (raw)
In-Reply-To: <25f6950a67be079e32ad5b4139b1e89e367a91ba.camel@linux.ibm.com>
On Thu, Oct 5, 2023 at 4:14 PM Mimi Zohar <zohar@linux.ibm.com> wrote:
>
> On Thu, 2023-10-05 at 13:26 +0300, Amir Goldstein wrote:
> > On Thu, Oct 5, 2023 at 12:59 PM syzbot
> > <syzbot+b42fe626038981fb7bfa@syzkaller.appspotmail.com> wrote:
> > >
> > > Hello,
> > >
> > > syzbot tried to test the proposed patch but the build/boot failed:
> >
> > My mistake. Please try again:
> >
> > #syz test: https://github.com/amir73il/linux ima-ovl-fix
>
> Thanks, Amir. "mutext_init(&iint->mutex); moved, but the status
> initialization lines 161-166 were dropped. They're needed by IMA-
> appraisal for signature verification.
>
> iint->ima_file_status = INTEGRITY_UNKNOWN;
> iint->ima_mmap_status = INTEGRITY_UNKNOWN;
> iint->ima_bprm_status = INTEGRITY_UNKNOWN;
> iint->ima_read_status = INTEGRITY_UNKNOWN;
> iint->ima_creds_status = INTEGRITY_UNKNOWN;
> iint->evm_status = INTEGRITY_UNKNOWN;
>
They are dropped from iint_init_once()
They are not needed there because there are now set
in every iint allocation in iint_init_always()
instead of being set in iint_free()
This is the standard practice for slab objects.
See inode_init_once()/inode_init_always().
Thanks,
Amir.
next prev parent reply other threads:[~2023-10-05 15:52 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <00000000000067d24205c4d0e599@google.com>
2021-07-19 15:11 ` [syzbot] possible deadlock in mnt_want_write (2) Miklos Szeredi
2021-07-22 13:50 ` Mimi Zohar
2022-07-02 17:27 ` syzbot
2022-07-05 12:53 ` Mimi Zohar
[not found] ` <20220706121038.2045-1-hdanton@sina.com>
2022-07-06 22:24 ` Mimi Zohar
2023-06-06 9:12 ` Miklos Szeredi
2023-06-06 9:12 ` syzbot
2023-06-06 9:13 ` Miklos Szeredi
2023-10-04 16:45 ` [syzbot] [integrity] [overlayfs] " syzbot
2023-10-05 9:36 ` Amir Goldstein
2023-10-05 9:59 ` syzbot
2023-10-05 10:26 ` Amir Goldstein
2023-10-05 10:46 ` syzbot
2023-10-05 11:47 ` Mimi Zohar
2023-10-05 13:22 ` Amir Goldstein [this message]
2023-10-05 13:35 ` Mimi Zohar
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