From: Yu Zhao <yuzhao@google.com>
To: Matthew Wilcox <willy@infradead.org>
Cc: Uladzislau Rezki <urezki@gmail.com>,
Zorro Lang <zlang@redhat.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
bugzilla-daemon@kernel.org, linux-s390@vger.kernel.org,
linux-xfs@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Linux-MM <linux-mm@kvack.org>, Kees Cook <keescook@chromium.org>
Subject: Re: [Bug 216073] New: [s390x] kernel BUG at mm/usercopy.c:101! usercopy: Kernel memory exposure attempt detected from vmalloc 'n o area' (offset 0, size 1)!
Date: Sun, 12 Jun 2022 12:43:45 -0600 [thread overview]
Message-ID: <CAOUHufan8+uombVMSSrKra-8Cu5pSJj80LVa6QrGbFzBmUQHxg@mail.gmail.com> (raw)
In-Reply-To: <YqYq846zFUInllTw@casper.infradead.org>
On Sun, Jun 12, 2022 at 12:05 PM Matthew Wilcox <willy@infradead.org> wrote:
>
> On Sun, Jun 12, 2022 at 11:59:58AM -0600, Yu Zhao wrote:
> > Please let me know if there is something we want to test -- I can
> > reproduce the problem reliably:
> >
> > ------------[ cut here ]------------
> > kernel BUG at mm/usercopy.c:101!
>
> The line right before cut here would have been nice ;-)
Right.
$ grep usercopy:
usercopy: Kernel memory exposure attempt detected from vmalloc (offset
2882303761517129920, size 11)!
usercopy: Kernel memory exposure attempt detected from vmalloc (offset
8574853690513436864, size 11)!
usercopy: Kernel memory exposure attempt detected from vmalloc (offset
7998392938210013376, size 11)!
...
> https://lore.kernel.org/linux-mm/YqXU+oU7wayOcmCe@casper.infradead.org/
>
> might fix your problem, but I can't be sure without that line.
Thanks, it worked!
next prev parent reply other threads:[~2022-06-12 18:45 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-216073-27@https.bugzilla.kernel.org/>
2022-06-06 22:13 ` [Bug 216073] New: [s390x] kernel BUG at mm/usercopy.c:101! usercopy: Kernel memory exposure attempt detected from vmalloc 'n o area' (offset 0, size 1)! Andrew Morton
2022-06-07 15:05 ` Alexander Gordeev
2022-06-08 2:19 ` Zorro Lang
2022-06-08 19:13 ` Alexander Gordeev
2022-06-09 2:49 ` Zorro Lang
2022-06-12 4:42 ` Zorro Lang
2022-06-12 11:58 ` Matthew Wilcox
2022-06-12 13:03 ` Uladzislau Rezki
2022-06-12 17:26 ` Matthew Wilcox
2022-06-12 17:59 ` Yu Zhao
2022-06-12 18:05 ` Matthew Wilcox
2022-06-12 18:43 ` Yu Zhao [this message]
2022-06-12 19:52 ` Matthew Wilcox
2022-06-12 20:53 ` Yu Zhao
2022-06-12 19:07 ` Uladzislau Rezki
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