From: Al Viro <viro@ZenIV.linux.org.uk>
To: Dmitry Vyukov <dvyukov@google.com>
Cc: "linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
syzkaller <syzkaller@googlegroups.com>
Subject: Re: fs: GPF in bd_mount
Date: Sun, 4 Sep 2016 15:06:07 +0100 [thread overview]
Message-ID: <20160904140606.GE2356@ZenIV.linux.org.uk> (raw)
In-Reply-To: <CACT4Y+ZWSweA948A7ZHCjsAepnugHPNSnZC_mnonG3ts5ZSASg@mail.gmail.com>
On Sun, Sep 04, 2016 at 12:43:28PM +0200, Dmitry Vyukov wrote:
AFAICS, it's been introduced in commit 3684aa7099e0ab1038a1a1bf717ae60ffc3018d1
Author: Shaohua Li <shli@fb.com>
Date: Mon Feb 22 15:27:40 2016 -0700
block-dev: enable writeback cgroup support
See if you can reproduce it after the following:
ed fs/block_dev.c <<'EOF'
/bd_mount/
/if/s/dent/!IS_ERR(dent)/
wq
EOF
Said that, I'm not sure why mount_pseudo() would be returning any errors;
rejection should happen in the caller (due to MS_NOUSER in the flags), but
I don't understand what would trigger it on mount_pseudo() level...
next prev parent reply other threads:[~2016-09-04 15:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-04 10:43 fs: GPF in bd_mount Dmitry Vyukov
2016-09-04 14:06 ` Al Viro [this message]
2016-09-04 14:29 ` Al Viro
2016-09-05 8:43 ` Dmitry Vyukov
2016-09-04 14:08 ` Mateusz Guzik
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