diff mbox series

[v2,1/3] usb: chipidea: Fix DMA overwrite for Tegra

Message ID	ef8466b834c1726f5404c95c3e192e90460146f8.1695934946.git.mirq-linux@rere.qmqm.pl
State	New
Headers	Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:7 as permitted sender) client-ip=2620:137:e000::3:7; Date: Thu, 28 Sep 2023 23:06:03 +0200 Message-Id: <ef8466b834c1726f5404c95c3e192e90460146f8.1695934946.git.mirq-linux@rere.qmqm.pl> In-Reply-To: <cover.1695934946.git.mirq-linux@rere.qmqm.pl> References: <cover.1695934946.git.mirq-linux@rere.qmqm.pl> Subject: [PATCH v2 1/3] usb: chipidea: Fix DMA overwrite for Tegra MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= <mirq-linux@rere.qmqm.pl> To: Peter Chen <peter.chen@kernel.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Peter Geis <pgwipeout@gmail.com>, Thierry Reding <treding@nvidia.com>, Dmitry Osipenko <digetx@gmail.com> Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org Precedence: bulk
Series	usb: chipidea: An USB DMA fix + cleanups for Tegra \| [v2,0/3] usb: chipidea: An USB DMA fix + cleanups for Tegra [v2,1/3] usb: chipidea: Fix DMA overwrite for Tegra [v2,2/3] usb: chipidea: Simplify Tegra DMA alignment code [v2,3/3] usb: chipidea: tegra: Consistently use dev_err_probe()

Commit Message

Michał Mirosław Sept. 28, 2023, 9:06 p.m. UTC

  Tegra USB controllers seem to issue DMA in full 32-bit words only and thus
may overwrite unevenly-sized buffers.  One such occurrence is detected by
SLUB when receiving a reply to a 1-byte buffer (below).  Fix this by
allocating a bounce buffer also for buffers with sizes not a multiple of 4.

=============================================================================
BUG kmalloc-64 (Tainted: G    B             ): kmalloc Redzone overwritten
-----------------------------------------------------------------------------

0x8555cd02-0x8555cd03 @offset=3330. First byte 0x0 instead of 0xcc
Allocated in usb_get_status+0x2b/0xac age=1 cpu=3 pid=41
 __kmem_cache_alloc_node+0x12f/0x1e4
 __kmalloc+0x33/0x8c
 usb_get_status+0x2b/0xac
 hub_probe+0x5e9/0xcec
 usb_probe_interface+0xbf/0x21c
 really_probe+0xa5/0x2c4
 __driver_probe_device+0x75/0x174
 driver_probe_device+0x31/0x94
 __device_attach_driver+0x65/0xc0
 bus_for_each_drv+0x4b/0x74
 __device_attach+0x69/0x120
 bus_probe_device+0x65/0x6c
 device_add+0x48b/0x5f8
 usb_set_configuration+0x37b/0x6b4
 usb_generic_driver_probe+0x37/0x68
 usb_probe_device+0x35/0xb4
Slab 0xbf622b80 objects=21 used=18 fp=0x8555cdc0 flags=0x800(slab|zone=0)
Object 0x8555cd00 @offset=3328 fp=0x00000000

Redzone  8555ccc0: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
Redzone  8555ccd0: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
Redzone  8555cce0: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
Redzone  8555ccf0: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
Object   8555cd00: 01 00 00 00 cc cc cc cc cc cc cc cc cc cc cc cc  ................
Object   8555cd10: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
Object   8555cd20: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
Object   8555cd30: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
Redzone  8555cd40: cc cc cc cc                                      ....
Padding  8555cd74: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a              ZZZZZZZZZZZZ
CPU: 3 PID: 41 Comm: kworker/3:1 Tainted: G    B              6.6.0-rc1mq-00118-g59786f827ea1 #1115
Hardware name: NVIDIA Tegra SoC (Flattened Device Tree)
Workqueue: usb_hub_wq hub_event
[<8010ca28>] (unwind_backtrace) from [<801090a5>] (show_stack+0x11/0x14)
[<801090a5>] (show_stack) from [<805da2fb>] (dump_stack_lvl+0x4d/0x7c)
[<805da2fb>] (dump_stack_lvl) from [<8026464f>] (check_bytes_and_report+0xb3/0xe4)
[<8026464f>] (check_bytes_and_report) from [<802648e1>] (check_object+0x261/0x290)
[<802648e1>] (check_object) from [<802671b1>] (free_to_partial_list+0x105/0x3f8)
[<802671b1>] (free_to_partial_list) from [<80268613>] (__kmem_cache_free+0x103/0x128)
[<80268613>] (__kmem_cache_free) from [<80425a67>] (usb_get_status+0x73/0xac)
[<80425a67>] (usb_get_status) from [<80421b31>] (hub_probe+0x5e9/0xcec)
[<80421b31>] (hub_probe) from [<80428bbb>] (usb_probe_interface+0xbf/0x21c)
[<80428bbb>] (usb_probe_interface) from [<803ee13d>] (really_probe+0xa5/0x2c4)
[<803ee13d>] (really_probe) from [<803ee3d1>] (__driver_probe_device+0x75/0x174)
[<803ee3d1>] (__driver_probe_device) from [<803ee501>] (driver_probe_device+0x31/0x94)
usb 1-1: device descriptor read/8, error -71

Fixes: fc53d5279094 ("usb: chipidea: tegra: Support host mode")
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
---
 drivers/usb/chipidea/host.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

Comments

Thierry Reding Oct. 11, 2023, 9:51 p.m. UTC | #1

On Thu, Sep 28, 2023 at 11:06:03PM +0200, Michał Mirosław wrote:
> Tegra USB controllers seem to issue DMA in full 32-bit words only and thus
> may overwrite unevenly-sized buffers.  One such occurrence is detected by
> SLUB when receiving a reply to a 1-byte buffer (below).  Fix this by
> allocating a bounce buffer also for buffers with sizes not a multiple of 4.
> 
> =============================================================================
> BUG kmalloc-64 (Tainted: G    B             ): kmalloc Redzone overwritten
> -----------------------------------------------------------------------------
> 
> 0x8555cd02-0x8555cd03 @offset=3330. First byte 0x0 instead of 0xcc
> Allocated in usb_get_status+0x2b/0xac age=1 cpu=3 pid=41
>  __kmem_cache_alloc_node+0x12f/0x1e4
>  __kmalloc+0x33/0x8c
>  usb_get_status+0x2b/0xac
>  hub_probe+0x5e9/0xcec
>  usb_probe_interface+0xbf/0x21c
>  really_probe+0xa5/0x2c4
>  __driver_probe_device+0x75/0x174
>  driver_probe_device+0x31/0x94
>  __device_attach_driver+0x65/0xc0
>  bus_for_each_drv+0x4b/0x74
>  __device_attach+0x69/0x120
>  bus_probe_device+0x65/0x6c
>  device_add+0x48b/0x5f8
>  usb_set_configuration+0x37b/0x6b4
>  usb_generic_driver_probe+0x37/0x68
>  usb_probe_device+0x35/0xb4
> Slab 0xbf622b80 objects=21 used=18 fp=0x8555cdc0 flags=0x800(slab|zone=0)
> Object 0x8555cd00 @offset=3328 fp=0x00000000
> 
> Redzone  8555ccc0: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
> Redzone  8555ccd0: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
> Redzone  8555cce0: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
> Redzone  8555ccf0: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
> Object   8555cd00: 01 00 00 00 cc cc cc cc cc cc cc cc cc cc cc cc  ................
> Object   8555cd10: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
> Object   8555cd20: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
> Object   8555cd30: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
> Redzone  8555cd40: cc cc cc cc                                      ....
> Padding  8555cd74: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a              ZZZZZZZZZZZZ
> CPU: 3 PID: 41 Comm: kworker/3:1 Tainted: G    B              6.6.0-rc1mq-00118-g59786f827ea1 #1115
> Hardware name: NVIDIA Tegra SoC (Flattened Device Tree)
> Workqueue: usb_hub_wq hub_event
> [<8010ca28>] (unwind_backtrace) from [<801090a5>] (show_stack+0x11/0x14)
> [<801090a5>] (show_stack) from [<805da2fb>] (dump_stack_lvl+0x4d/0x7c)
> [<805da2fb>] (dump_stack_lvl) from [<8026464f>] (check_bytes_and_report+0xb3/0xe4)
> [<8026464f>] (check_bytes_and_report) from [<802648e1>] (check_object+0x261/0x290)
> [<802648e1>] (check_object) from [<802671b1>] (free_to_partial_list+0x105/0x3f8)
> [<802671b1>] (free_to_partial_list) from [<80268613>] (__kmem_cache_free+0x103/0x128)
> [<80268613>] (__kmem_cache_free) from [<80425a67>] (usb_get_status+0x73/0xac)
> [<80425a67>] (usb_get_status) from [<80421b31>] (hub_probe+0x5e9/0xcec)
> [<80421b31>] (hub_probe) from [<80428bbb>] (usb_probe_interface+0xbf/0x21c)
> [<80428bbb>] (usb_probe_interface) from [<803ee13d>] (really_probe+0xa5/0x2c4)
> [<803ee13d>] (really_probe) from [<803ee3d1>] (__driver_probe_device+0x75/0x174)
> [<803ee3d1>] (__driver_probe_device) from [<803ee501>] (driver_probe_device+0x31/0x94)
> usb 1-1: device descriptor read/8, error -71
> 
> Fixes: fc53d5279094 ("usb: chipidea: tegra: Support host mode")
> Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
> ---
>  drivers/usb/chipidea/host.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)

Acked-by: Thierry Reding <treding@nvidia.com>

Peter Chen Oct. 12, 2023, 2:28 p.m. UTC | #2

On 23-09-28 23:06:03, Michał Mirosław wrote:
> Tegra USB controllers seem to issue DMA in full 32-bit words only and thus
> may overwrite unevenly-sized buffers.  One such occurrence is detected by
> SLUB when receiving a reply to a 1-byte buffer (below).  Fix this by
> allocating a bounce buffer also for buffers with sizes not a multiple of 4.
> 
> =============================================================================
> BUG kmalloc-64 (Tainted: G    B             ): kmalloc Redzone overwritten
> -----------------------------------------------------------------------------
> 
> 0x8555cd02-0x8555cd03 @offset=3330. First byte 0x0 instead of 0xcc
> Allocated in usb_get_status+0x2b/0xac age=1 cpu=3 pid=41
>  __kmem_cache_alloc_node+0x12f/0x1e4
>  __kmalloc+0x33/0x8c
>  usb_get_status+0x2b/0xac
>  hub_probe+0x5e9/0xcec
>  usb_probe_interface+0xbf/0x21c
>  really_probe+0xa5/0x2c4
>  __driver_probe_device+0x75/0x174
>  driver_probe_device+0x31/0x94
>  __device_attach_driver+0x65/0xc0
>  bus_for_each_drv+0x4b/0x74
>  __device_attach+0x69/0x120
>  bus_probe_device+0x65/0x6c
>  device_add+0x48b/0x5f8
>  usb_set_configuration+0x37b/0x6b4
>  usb_generic_driver_probe+0x37/0x68
>  usb_probe_device+0x35/0xb4
> Slab 0xbf622b80 objects=21 used=18 fp=0x8555cdc0 flags=0x800(slab|zone=0)
> Object 0x8555cd00 @offset=3328 fp=0x00000000
> 
> Redzone  8555ccc0: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
> Redzone  8555ccd0: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
> Redzone  8555cce0: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
> Redzone  8555ccf0: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
> Object   8555cd00: 01 00 00 00 cc cc cc cc cc cc cc cc cc cc cc cc  ................
> Object   8555cd10: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
> Object   8555cd20: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
> Object   8555cd30: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
> Redzone  8555cd40: cc cc cc cc                                      ....
> Padding  8555cd74: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a              ZZZZZZZZZZZZ
> CPU: 3 PID: 41 Comm: kworker/3:1 Tainted: G    B              6.6.0-rc1mq-00118-g59786f827ea1 #1115
> Hardware name: NVIDIA Tegra SoC (Flattened Device Tree)
> Workqueue: usb_hub_wq hub_event
> [<8010ca28>] (unwind_backtrace) from [<801090a5>] (show_stack+0x11/0x14)
> [<801090a5>] (show_stack) from [<805da2fb>] (dump_stack_lvl+0x4d/0x7c)
> [<805da2fb>] (dump_stack_lvl) from [<8026464f>] (check_bytes_and_report+0xb3/0xe4)
> [<8026464f>] (check_bytes_and_report) from [<802648e1>] (check_object+0x261/0x290)
> [<802648e1>] (check_object) from [<802671b1>] (free_to_partial_list+0x105/0x3f8)
> [<802671b1>] (free_to_partial_list) from [<80268613>] (__kmem_cache_free+0x103/0x128)
> [<80268613>] (__kmem_cache_free) from [<80425a67>] (usb_get_status+0x73/0xac)
> [<80425a67>] (usb_get_status) from [<80421b31>] (hub_probe+0x5e9/0xcec)
> [<80421b31>] (hub_probe) from [<80428bbb>] (usb_probe_interface+0xbf/0x21c)
> [<80428bbb>] (usb_probe_interface) from [<803ee13d>] (really_probe+0xa5/0x2c4)
> [<803ee13d>] (really_probe) from [<803ee3d1>] (__driver_probe_device+0x75/0x174)
> [<803ee3d1>] (__driver_probe_device) from [<803ee501>] (driver_probe_device+0x31/0x94)
> usb 1-1: device descriptor read/8, error -71
> 
> Fixes: fc53d5279094 ("usb: chipidea: tegra: Support host mode")
> Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>

Acked-by: Peter Chen <peter.chen@kernel.org>
> ---
>  drivers/usb/chipidea/host.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
> index 08af26b762a2..abddd39d1ff1 100644
> --- a/drivers/usb/chipidea/host.c
> +++ b/drivers/usb/chipidea/host.c
> @@ -411,12 +411,13 @@ static int ci_hdrc_alloc_dma_aligned_buffer(struct urb *urb, gfp_t mem_flags)
>  	const unsigned int ci_hdrc_usb_dma_align = 32;
>  	size_t kmalloc_size;
>  
> -	if (urb->num_sgs || urb->sg || urb->transfer_buffer_length == 0 ||
> -	    !((uintptr_t)urb->transfer_buffer & (ci_hdrc_usb_dma_align - 1)))
> +	if (urb->num_sgs || urb->sg || urb->transfer_buffer_length == 0)
> +		return 0;
> +	if (!((uintptr_t)urb->transfer_buffer & (ci_hdrc_usb_dma_align - 1)) && !(urb->transfer_buffer_length & 3))
>  		return 0;
>  
>  	/* Allocate a buffer with enough padding for alignment */
> -	kmalloc_size = urb->transfer_buffer_length +
> +	kmalloc_size = ALIGN(urb->transfer_buffer_length, 4) +
>  		       sizeof(struct ci_hdrc_dma_aligned_buffer) +
>  		       ci_hdrc_usb_dma_align - 1;
>  
> -- 
> 2.39.2
>

diff mbox series

Patch

diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
index 08af26b762a2..abddd39d1ff1 100644
--- a/drivers/usb/chipidea/host.c
+++ b/drivers/usb/chipidea/host.c
@@ -411,12 +411,13 @@  static int ci_hdrc_alloc_dma_aligned_buffer(struct urb *urb, gfp_t mem_flags)
 	const unsigned int ci_hdrc_usb_dma_align = 32;
 	size_t kmalloc_size;
 
-	if (urb->num_sgs || urb->sg || urb->transfer_buffer_length == 0 ||
-	    !((uintptr_t)urb->transfer_buffer & (ci_hdrc_usb_dma_align - 1)))
+	if (urb->num_sgs || urb->sg || urb->transfer_buffer_length == 0)
+		return 0;
+	if (!((uintptr_t)urb->transfer_buffer & (ci_hdrc_usb_dma_align - 1)) && !(urb->transfer_buffer_length & 3))
 		return 0;
 
 	/* Allocate a buffer with enough padding for alignment */
-	kmalloc_size = urb->transfer_buffer_length +
+	kmalloc_size = ALIGN(urb->transfer_buffer_length, 4) +
 		       sizeof(struct ci_hdrc_dma_aligned_buffer) +
 		       ci_hdrc_usb_dma_align - 1;