From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: stable@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
patches@lists.linux.dev, Jimmy Assarsson <extja@kvaser.com>,
Anssi Hannula <anssi.hannula@bitwise.fi>,
Marc Kleine-Budde <mkl@pengutronix.de>,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.15 14/36] can: kvaser_usb: hydra: help gcc-13 to figure out cmd_len
Date: Thu, 23 Feb 2023 14:06:50 +0100 [thread overview]
Message-ID: <20230223130429.732145967@linuxfoundation.org> (raw)
In-Reply-To: <20230223130429.072633724@linuxfoundation.org>
From: Marc Kleine-Budde <mkl@pengutronix.de>
[ Upstream commit f006229135b7debf4037adb1eb93e358559593db ]
Debian's gcc-13 [1] throws the following error in
kvaser_usb_hydra_cmd_size():
[1] gcc version 13.0.0 20221214 (experimental) [master r13-4693-g512098a3316] (Debian 13-20221214-1)
| drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c:502:65: error:
| array subscript ‘struct kvaser_cmd_ext[0]’ is partly outside array
| bounds of ‘unsigned char[32]’ [-Werror=array-bounds=]
| 502 | ret = le16_to_cpu(((struct kvaser_cmd_ext *)cmd)->len);
kvaser_usb_hydra_cmd_size() returns the size of given command. It
depends on the command number (cmd->header.cmd_no). For extended
commands (cmd->header.cmd_no == CMD_EXTENDED) the above shown code is
executed.
Help gcc to recognize that this code path is not taken in all cases,
by calling kvaser_usb_hydra_cmd_size() directly after assigning the
command number.
Fixes: aec5fb2268b7 ("can: kvaser_usb: Add support for Kvaser USB hydra family")
Cc: Jimmy Assarsson <extja@kvaser.com>
Cc: Anssi Hannula <anssi.hannula@bitwise.fi>
Link: https://lore.kernel.org/all/20221219110104.1073881-1-mkl@pengutronix.de
Tested-by: Jimmy Assarsson <extja@kvaser.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../net/can/usb/kvaser_usb/kvaser_usb_hydra.c | 33 ++++++++++++++-----
1 file changed, 24 insertions(+), 9 deletions(-)
diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c
index 6cc65bf28d03e..562105b8a6327 100644
--- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c
+++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c
@@ -545,6 +545,7 @@ static int kvaser_usb_hydra_send_simple_cmd(struct kvaser_usb *dev,
u8 cmd_no, int channel)
{
struct kvaser_cmd *cmd;
+ size_t cmd_len;
int err;
cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL);
@@ -552,6 +553,7 @@ static int kvaser_usb_hydra_send_simple_cmd(struct kvaser_usb *dev,
return -ENOMEM;
cmd->header.cmd_no = cmd_no;
+ cmd_len = kvaser_usb_hydra_cmd_size(cmd);
if (channel < 0) {
kvaser_usb_hydra_set_cmd_dest_he
(cmd, KVASER_USB_HYDRA_HE_ADDRESS_ILLEGAL);
@@ -568,7 +570,7 @@ static int kvaser_usb_hydra_send_simple_cmd(struct kvaser_usb *dev,
kvaser_usb_hydra_set_cmd_transid
(cmd, kvaser_usb_hydra_get_next_transid(dev));
- err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd));
+ err = kvaser_usb_send_cmd(dev, cmd, cmd_len);
if (err)
goto end;
@@ -584,6 +586,7 @@ kvaser_usb_hydra_send_simple_cmd_async(struct kvaser_usb_net_priv *priv,
{
struct kvaser_cmd *cmd;
struct kvaser_usb *dev = priv->dev;
+ size_t cmd_len;
int err;
cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_ATOMIC);
@@ -591,14 +594,14 @@ kvaser_usb_hydra_send_simple_cmd_async(struct kvaser_usb_net_priv *priv,
return -ENOMEM;
cmd->header.cmd_no = cmd_no;
+ cmd_len = kvaser_usb_hydra_cmd_size(cmd);
kvaser_usb_hydra_set_cmd_dest_he
(cmd, dev->card_data.hydra.channel_to_he[priv->channel]);
kvaser_usb_hydra_set_cmd_transid
(cmd, kvaser_usb_hydra_get_next_transid(dev));
- err = kvaser_usb_send_cmd_async(priv, cmd,
- kvaser_usb_hydra_cmd_size(cmd));
+ err = kvaser_usb_send_cmd_async(priv, cmd, cmd_len);
if (err)
kfree(cmd);
@@ -742,6 +745,7 @@ static int kvaser_usb_hydra_get_single_capability(struct kvaser_usb *dev,
{
struct kvaser_usb_dev_card_data *card_data = &dev->card_data;
struct kvaser_cmd *cmd;
+ size_t cmd_len;
u32 value = 0;
u32 mask = 0;
u16 cap_cmd_res;
@@ -753,13 +757,14 @@ static int kvaser_usb_hydra_get_single_capability(struct kvaser_usb *dev,
return -ENOMEM;
cmd->header.cmd_no = CMD_GET_CAPABILITIES_REQ;
+ cmd_len = kvaser_usb_hydra_cmd_size(cmd);
cmd->cap_req.cap_cmd = cpu_to_le16(cap_cmd_req);
kvaser_usb_hydra_set_cmd_dest_he(cmd, card_data->hydra.sysdbg_he);
kvaser_usb_hydra_set_cmd_transid
(cmd, kvaser_usb_hydra_get_next_transid(dev));
- err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd));
+ err = kvaser_usb_send_cmd(dev, cmd, cmd_len);
if (err)
goto end;
@@ -1582,6 +1587,7 @@ static int kvaser_usb_hydra_get_busparams(struct kvaser_usb_net_priv *priv,
struct kvaser_usb *dev = priv->dev;
struct kvaser_usb_net_hydra_priv *hydra = priv->sub_priv;
struct kvaser_cmd *cmd;
+ size_t cmd_len;
int err;
if (!hydra)
@@ -1592,6 +1598,7 @@ static int kvaser_usb_hydra_get_busparams(struct kvaser_usb_net_priv *priv,
return -ENOMEM;
cmd->header.cmd_no = CMD_GET_BUSPARAMS_REQ;
+ cmd_len = kvaser_usb_hydra_cmd_size(cmd);
kvaser_usb_hydra_set_cmd_dest_he
(cmd, dev->card_data.hydra.channel_to_he[priv->channel]);
kvaser_usb_hydra_set_cmd_transid
@@ -1601,7 +1608,7 @@ static int kvaser_usb_hydra_get_busparams(struct kvaser_usb_net_priv *priv,
reinit_completion(&priv->get_busparams_comp);
- err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd));
+ err = kvaser_usb_send_cmd(dev, cmd, cmd_len);
if (err)
return err;
@@ -1628,6 +1635,7 @@ static int kvaser_usb_hydra_set_bittiming(const struct net_device *netdev,
struct kvaser_cmd *cmd;
struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
struct kvaser_usb *dev = priv->dev;
+ size_t cmd_len;
int err;
cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL);
@@ -1635,6 +1643,7 @@ static int kvaser_usb_hydra_set_bittiming(const struct net_device *netdev,
return -ENOMEM;
cmd->header.cmd_no = CMD_SET_BUSPARAMS_REQ;
+ cmd_len = kvaser_usb_hydra_cmd_size(cmd);
memcpy(&cmd->set_busparams_req.busparams_nominal, busparams,
sizeof(cmd->set_busparams_req.busparams_nominal));
@@ -1643,7 +1652,7 @@ static int kvaser_usb_hydra_set_bittiming(const struct net_device *netdev,
kvaser_usb_hydra_set_cmd_transid
(cmd, kvaser_usb_hydra_get_next_transid(dev));
- err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd));
+ err = kvaser_usb_send_cmd(dev, cmd, cmd_len);
kfree(cmd);
@@ -1656,6 +1665,7 @@ static int kvaser_usb_hydra_set_data_bittiming(const struct net_device *netdev,
struct kvaser_cmd *cmd;
struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
struct kvaser_usb *dev = priv->dev;
+ size_t cmd_len;
int err;
cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL);
@@ -1663,6 +1673,7 @@ static int kvaser_usb_hydra_set_data_bittiming(const struct net_device *netdev,
return -ENOMEM;
cmd->header.cmd_no = CMD_SET_BUSPARAMS_FD_REQ;
+ cmd_len = kvaser_usb_hydra_cmd_size(cmd);
memcpy(&cmd->set_busparams_req.busparams_data, busparams,
sizeof(cmd->set_busparams_req.busparams_data));
@@ -1680,7 +1691,7 @@ static int kvaser_usb_hydra_set_data_bittiming(const struct net_device *netdev,
kvaser_usb_hydra_set_cmd_transid
(cmd, kvaser_usb_hydra_get_next_transid(dev));
- err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd));
+ err = kvaser_usb_send_cmd(dev, cmd, cmd_len);
kfree(cmd);
@@ -1808,6 +1819,7 @@ static int kvaser_usb_hydra_get_software_info(struct kvaser_usb *dev)
static int kvaser_usb_hydra_get_software_details(struct kvaser_usb *dev)
{
struct kvaser_cmd *cmd;
+ size_t cmd_len;
int err;
u32 flags;
struct kvaser_usb_dev_card_data *card_data = &dev->card_data;
@@ -1817,6 +1829,7 @@ static int kvaser_usb_hydra_get_software_details(struct kvaser_usb *dev)
return -ENOMEM;
cmd->header.cmd_no = CMD_GET_SOFTWARE_DETAILS_REQ;
+ cmd_len = kvaser_usb_hydra_cmd_size(cmd);
cmd->sw_detail_req.use_ext_cmd = 1;
kvaser_usb_hydra_set_cmd_dest_he
(cmd, KVASER_USB_HYDRA_HE_ADDRESS_ILLEGAL);
@@ -1824,7 +1837,7 @@ static int kvaser_usb_hydra_get_software_details(struct kvaser_usb *dev)
kvaser_usb_hydra_set_cmd_transid
(cmd, kvaser_usb_hydra_get_next_transid(dev));
- err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd));
+ err = kvaser_usb_send_cmd(dev, cmd, cmd_len);
if (err)
goto end;
@@ -1942,6 +1955,7 @@ static int kvaser_usb_hydra_set_opt_mode(const struct kvaser_usb_net_priv *priv)
{
struct kvaser_usb *dev = priv->dev;
struct kvaser_cmd *cmd;
+ size_t cmd_len;
int err;
if ((priv->can.ctrlmode &
@@ -1957,6 +1971,7 @@ static int kvaser_usb_hydra_set_opt_mode(const struct kvaser_usb_net_priv *priv)
return -ENOMEM;
cmd->header.cmd_no = CMD_SET_DRIVERMODE_REQ;
+ cmd_len = kvaser_usb_hydra_cmd_size(cmd);
kvaser_usb_hydra_set_cmd_dest_he
(cmd, dev->card_data.hydra.channel_to_he[priv->channel]);
kvaser_usb_hydra_set_cmd_transid
@@ -1966,7 +1981,7 @@ static int kvaser_usb_hydra_set_opt_mode(const struct kvaser_usb_net_priv *priv)
else
cmd->set_ctrlmode.mode = KVASER_USB_HYDRA_CTRLMODE_NORMAL;
- err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd));
+ err = kvaser_usb_send_cmd(dev, cmd, cmd_len);
kfree(cmd);
return err;
--
2.39.0
next prev parent reply other threads:[~2023-02-23 13:11 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-23 13:06 [PATCH 5.15 00/36] 5.15.96-rc1 review Greg Kroah-Hartman
2023-02-23 13:06 ` [PATCH 5.15 01/36] drm/etnaviv: dont truncate physical page address Greg Kroah-Hartman
2023-02-23 13:06 ` [PATCH 5.15 02/36] wifi: rtl8xxxu: gen2: Turn on the rate control Greg Kroah-Hartman
2023-02-23 13:06 ` [PATCH 5.15 03/36] drm/edid: Fix minimum bpc supported with DSC1.2 for HDMI sink Greg Kroah-Hartman
2023-02-23 13:06 ` [PATCH 5.15 04/36] clk: mxl: Switch from direct readl/writel based IO to regmap based IO Greg Kroah-Hartman
2023-02-23 13:06 ` [PATCH 5.15 05/36] clk: mxl: Remove redundant spinlocks Greg Kroah-Hartman
2023-02-23 13:06 ` [PATCH 5.15 06/36] clk: mxl: Add option to override gate clks Greg Kroah-Hartman
2023-02-23 13:06 ` [PATCH 5.15 07/36] clk: mxl: Fix a clk entry by adding relevant flags Greg Kroah-Hartman
2023-02-23 13:06 ` [PATCH 5.15 08/36] powerpc: dts: t208x: Mark MAC1 and MAC2 as 10G Greg Kroah-Hartman
2023-02-23 13:06 ` [PATCH 5.15 09/36] clk: mxl: syscon_node_to_regmap() returns error pointers Greg Kroah-Hartman
2023-02-23 13:06 ` [PATCH 5.15 10/36] random: always mix cycle counter in add_latent_entropy() Greg Kroah-Hartman
2023-02-23 13:06 ` [PATCH 5.15 11/36] KVM: x86: Fail emulation during EMULTYPE_SKIP on any exception Greg Kroah-Hartman
2023-02-23 13:06 ` [PATCH 5.15 12/36] KVM: SVM: Skip WRMSR fastpath on VM-Exit if next RIP isnt valid Greg Kroah-Hartman
2023-02-23 13:06 ` [PATCH 5.15 13/36] KVM: VMX: Execute IBPB on emulated VM-exit when guest has IBRS Greg Kroah-Hartman
2023-02-23 13:06 ` Greg Kroah-Hartman [this message]
2023-02-23 13:06 ` [PATCH 5.15 15/36] powerpc: dts: t208x: Disable 10G on MAC1 and MAC2 Greg Kroah-Hartman
2023-02-23 13:06 ` [PATCH 5.15 16/36] powerpc: use generic version of arch_is_kernel_initmem_freed() Greg Kroah-Hartman
2023-02-23 13:06 ` [PATCH 5.15 17/36] powerpc/vmlinux.lds: Ensure STRICT_ALIGN_SIZE is at least page aligned Greg Kroah-Hartman
2023-02-23 13:06 ` [PATCH 5.15 18/36] powerpc/vmlinux.lds: Add an explicit symbol for the SRWX boundary Greg Kroah-Hartman
2023-02-23 13:06 ` [PATCH 5.15 19/36] powerpc/64s/radix: Fix crash with unaligned relocated kernel Greg Kroah-Hartman
2023-02-23 13:06 ` [PATCH 5.15 20/36] powerpc/64s/radix: Fix RWX mapping with " Greg Kroah-Hartman
2023-02-23 13:06 ` [PATCH 5.15 21/36] drm/i915/gvt: fix double free bug in split_2MB_gtt_entry Greg Kroah-Hartman
2023-02-23 13:06 ` [PATCH 5.15 22/36] uaccess: Add speculation barrier to copy_from_user() Greg Kroah-Hartman
2023-02-23 13:06 ` [PATCH 5.15 23/36] binder: read pre-translated fds from sender buffer Greg Kroah-Hartman
2023-02-23 13:07 ` [PATCH 5.15 24/36] binder: defer copies of pre-patched txn data Greg Kroah-Hartman
2023-02-23 13:07 ` [PATCH 5.15 25/36] binder: fix pointer cast warning Greg Kroah-Hartman
2023-02-23 13:07 ` [PATCH 5.15 26/36] binder: Address corner cases in deferred copy and fixup Greg Kroah-Hartman
2023-02-23 13:07 ` [PATCH 5.15 27/36] binder: Gracefully handle BINDER_TYPE_FDA objects with num_fds=0 Greg Kroah-Hartman
2023-02-23 13:07 ` [PATCH 5.15 28/36] nbd: fix possible overflow on first_minor in nbd_dev_add() Greg Kroah-Hartman
2023-02-23 13:07 ` [PATCH 5.15 29/36] wifi: mwifiex: Add missing compatible string for SD8787 Greg Kroah-Hartman
2023-02-23 13:07 ` [PATCH 5.15 30/36] audit: update the mailing list in MAINTAINERS Greg Kroah-Hartman
2023-02-23 13:07 ` [PATCH 5.15 31/36] ext4: Fix function prototype mismatch for ext4_feat_ktype Greg Kroah-Hartman
2023-02-23 13:07 ` [PATCH 5.15 32/36] kbuild: Add CONFIG_PAHOLE_VERSION Greg Kroah-Hartman
2023-02-23 13:07 ` [PATCH 5.15 33/36] scripts/pahole-flags.sh: Use pahole-version.sh Greg Kroah-Hartman
2023-02-23 13:07 ` [PATCH 5.15 34/36] lib/Kconfig.debug: Use CONFIG_PAHOLE_VERSION Greg Kroah-Hartman
2023-02-23 13:07 ` [PATCH 5.15 35/36] lib/Kconfig.debug: Allow BTF + DWARF5 with pahole 1.21+ Greg Kroah-Hartman
2023-02-23 13:07 ` [PATCH 5.15 36/36] Revert "net/sched: taprio: make qdisc_leaf() see the per-netdev-queue pfifo child qdiscs" Greg Kroah-Hartman
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