From: "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>
To: Dmitry Kasatkin <dmitry.kasatkin@huawei.com>
Cc: Sasha Levin <sashal@kernel.org>,
Al Viro <viro@zeniv.linux.org.uk>,
yuehaibing <yuehaibing@huawei.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
"keescook@chromium.org" <keescook@chromium.org>,
"stable@vger.kernel.org" <stable@vger.kernel.org>
Subject: Re: [PATCH -next] exec: Fix mem leak in kernel_read_file
Date: Wed, 13 Mar 2019 07:38:05 -0700 [thread overview]
Message-ID: <20190313143805.GB7489@kroah.com> (raw)
In-Reply-To: <0bd9d01037354048a1d45be1ce96714f@huawei.com>
On Wed, Mar 13, 2019 at 02:12:30PM +0000, Dmitry Kasatkin wrote:
>
>
>
>
>
>
> From: Sasha Levin <sashal@kernel.org>
> Sent: Tuesday, March 12, 2019 1:16 AM
> To: Dmitry Kasatkin
> Cc: Al Viro; yuehaibing; linux-kernel@vger.kernel.org; linux-fsdevel@vger.kernel.org; keescook@chromium.org; stable@vger.kernel.org; gregkh@google.com
> Subject: Re: [PATCH -next] exec: Fix mem leak in kernel_read_file
>
> On Mon, Mar 11, 2019 at 04:59:14PM +0000, Dmitry Kasatkin wrote:
> >
> >From: Al Viro <viro@ftp.linux.org.uk> on behalf of Al Viro <viro@zeniv.linux.org.uk>
> >Sent: Tuesday, February 19, 2019 4:25 AM
> >To: yuehaibing
> >Cc: linux-kernel@vger.kernel.org; linux-fsdevel@vger.kernel.org; Dmitry Kasatkin; keescook@chromium.org
> >Subject: Re: [PATCH -next] exec: Fix mem leak in kernel_read_file
> >
> >On Tue, Feb 19, 2019 at 10:10:38AM +0800, YueHaibing wrote:
> >> syzkaller report this:
> >> BUG: memory leak
> >> unreferenced object 0xffffc9000488d000 (size 9195520):
> >> comm "syz-executor.0", pid 2752, jiffies 4294787496 (age 18.757s)
> >> hex dump (first 32 bytes):
> >> ff ff ff ff ff ff ff ff a8 00 00 00 01 00 00 00 ................
> >> 02 00 00 00 00 00 00 00 80 a1 7a c1 ff ff ff ff ..........z.....
> >> backtrace:
> >> [<000000000863775c>] __vmalloc_node mm/vmalloc.c:1795 [inline]
> >> [<000000000863775c>] __vmalloc_node_flags mm/vmalloc.c:1809 [inline]
> >> [<000000000863775c>] vmalloc+0x8c/0xb0 mm/vmalloc.c:1831
> >> [<000000003f668111>] kernel_read_file+0x58f/0x7d0 fs/exec.c:924
> >> [<000000002385813f>] kernel_read_file_from_fd+0x49/0x80 fs/exec.c:993
> >> [<0000000011953ff1>] __do_sys_finit_module+0x13b/0x2a0 kernel/module.c:3895
> >> [<000000006f58491f>] do_syscall_64+0x147/0x600 arch/x86/entry/common.c:290
> >> [<00000000ee78baf4>] entry_SYSCALL_64_after_hwframe+0x49/0xbe
> >> [<00000000241f889b>] 0xffffffffffffffff
> >>
> >> It should goto 'out_free' lable to free allocated buf while kernel_read
> >> fails.
> >
> >Applied.
> >
> >
> >This must be applied to stables as well...
>
> > It's already in all relevant stable trees...
>
> I only can see in longterm 4.19.
>
> What about 4.9 and 4.14?
It was in the queue already for that (you can see it on git.kernel.org),
and they are now part of the -rc releases that are currently out for
review.
thanks,
greg k-h
next prev parent reply other threads:[~2019-03-13 14:38 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-19 2:10 [PATCH -next] exec: Fix mem leak in kernel_read_file YueHaibing
2019-02-19 2:25 ` Al Viro
2019-03-11 16:59 ` Dmitry Kasatkin
2019-03-11 23:16 ` Sasha Levin
2019-03-13 14:12 ` Dmitry Kasatkin
2019-03-13 14:38 ` gregkh [this message]
2019-03-13 15:00 ` Dmitry Kasatkin
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