From: David Laight <David.Laight@ACULAB.COM>
To: 'Aditya Pakki' <pakki001@umn.edu>
Cc: "kjlu@umn.edu" <kjlu@umn.edu>,
Andreas Noever <andreas.noever@gmail.com>,
Michael Jamet <michael.jamet@intel.com>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
Yehezkel Bernat <YehezkelShB@gmail.com>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <jakub.kicinski@netronome.com>,
Jesper Dangaard Brouer <hawk@kernel.org>,
John Fastabend <john.fastabend@gmail.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"xdp-newbies@vger.kernel.org" <xdp-newbies@vger.kernel.org>,
"bpf@vger.kernel.org" <bpf@vger.kernel.org>
Subject: RE: [PATCH] thunderbolt: xdomain: Fix to check return value of kmemdup
Date: Wed, 20 Mar 2019 10:57:54 +0000 [thread overview]
Message-ID: <57793438545e41cc85d00beab7505143@AcuMS.aculab.com> (raw)
In-Reply-To: <20190318225508.7886-1-pakki001@umn.edu>
From: Aditya Pakki
> Sent: 18 March 2019 22:55
>
> kmemdup can fail and return a NULL pointer. The patch modifies the
> signature of tb_xdp_schedule_request and passes the failure error upstream.
>
> Signed-off-by: Aditya Pakki <pakki001@umn.edu>
> ---
> drivers/thunderbolt/xdomain.c | 10 ++++++----
> 1 file changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/thunderbolt/xdomain.c b/drivers/thunderbolt/xdomain.c
> index e27dd8beb94b..b0e9cc30d708 100644
> --- a/drivers/thunderbolt/xdomain.c
> +++ b/drivers/thunderbolt/xdomain.c
> @@ -526,7 +526,7 @@ static void tb_xdp_handle_request(struct work_struct *work)
> kfree(xw);
> }
>
> -static void
> +static bool
> tb_xdp_schedule_request(struct tb *tb, const struct tb_xdp_header *hdr,
> size_t size)
> {
> @@ -534,13 +534,16 @@ tb_xdp_schedule_request(struct tb *tb, const struct tb_xdp_header *hdr,
>
> xw = kmalloc(sizeof(*xw), GFP_KERNEL);
> if (!xw)
> - return;
> + return false;
>
> INIT_WORK(&xw->work, tb_xdp_handle_request);
> xw->pkg = kmemdup(hdr, size, GFP_KERNEL);
> + if (!xw->pkg)
> + return false;
You're leaking 'xw' here.
David
-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)
next prev parent reply other threads:[~2019-03-20 10:56 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-18 22:55 [PATCH] thunderbolt: xdomain: Fix to check return value of kmemdup Aditya Pakki
2019-03-20 10:51 ` Mika Westerberg
2019-03-20 10:57 ` David Laight [this message]
2019-03-20 12:18 ` Mukesh Ojha
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