From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Nathan Chancellor <nathan@kernel.org>,
Kees Cook <keescook@chromium.org>,
Jakub Kicinski <kuba@kernel.org>, Sasha Levin <sashal@kernel.org>,
t.sailer@alumni.ethz.ch, davem@davemloft.net,
edumazet@google.com, pabeni@redhat.com, ndesaulniers@google.com,
linux-hams@vger.kernel.org, netdev@vger.kernel.org,
llvm@lists.linux.dev
Subject: [PATCH AUTOSEL 5.15 13/46] hamradio: baycom_epp: Fix return type of baycom_send_packet()
Date: Sun, 18 Dec 2022 11:12:11 -0500 [thread overview]
Message-ID: <20221218161244.930785-13-sashal@kernel.org> (raw)
In-Reply-To: <20221218161244.930785-1-sashal@kernel.org>
From: Nathan Chancellor <nathan@kernel.org>
[ Upstream commit c5733e5b15d91ab679646ec3149e192996a27d5d ]
With clang's kernel control flow integrity (kCFI, CONFIG_CFI_CLANG),
indirect call targets are validated against the expected function
pointer prototype to make sure the call target is valid to help mitigate
ROP attacks. If they are not identical, there is a failure at run time,
which manifests as either a kernel panic or thread getting killed. A
proposed warning in clang aims to catch these at compile time, which
reveals:
drivers/net/hamradio/baycom_epp.c:1119:25: error: incompatible function pointer types initializing 'netdev_tx_t (*)(struct sk_buff *, struct net_device *)' (aka 'enum netdev_tx (*)(struct sk_buff *, struct net_device *)') with an expression of type 'int (struct sk_buff *, struct net_device *)' [-Werror,-Wincompatible-function-pointer-types-strict]
.ndo_start_xmit = baycom_send_packet,
^~~~~~~~~~~~~~~~~~
1 error generated.
->ndo_start_xmit() in 'struct net_device_ops' expects a return type of
'netdev_tx_t', not 'int'. Adjust the return type of baycom_send_packet()
to match the prototype's to resolve the warning and CFI failure.
Link: https://github.com/ClangBuiltLinux/linux/issues/1750
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20221102160610.1186145-1-nathan@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/hamradio/baycom_epp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/hamradio/baycom_epp.c b/drivers/net/hamradio/baycom_epp.c
index 6b6f28d5b8d5..f9d03f7b9101 100644
--- a/drivers/net/hamradio/baycom_epp.c
+++ b/drivers/net/hamradio/baycom_epp.c
@@ -758,7 +758,7 @@ static void epp_bh(struct work_struct *work)
* ===================== network driver interface =========================
*/
-static int baycom_send_packet(struct sk_buff *skb, struct net_device *dev)
+static netdev_tx_t baycom_send_packet(struct sk_buff *skb, struct net_device *dev)
{
struct baycom_state *bc = netdev_priv(dev);
--
2.35.1
next prev parent reply other threads:[~2022-12-18 16:39 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20221218161244.930785-1-sashal@kernel.org>
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 03/46] brcmfmac: return error when getting invalid max_flowrings from dongle Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 04/46] wifi: ath9k: verify the expected usb_endpoints are present Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 05/46] wifi: ar5523: Fix use-after-free on ar5523_cmd() timed out Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 10/46] qed (gcc13): use u16 for fid to be big enough Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 11/46] bpf: make sure skb->len != 0 when redirecting to a tunneling device Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 12/46] net: ethernet: ti: Fix return type of netcp_ndo_start_xmit() Sasha Levin
2022-12-18 16:12 ` Sasha Levin [this message]
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 14/46] wifi: brcmfmac: Fix potential shift-out-of-bounds in brcmf_fw_alloc_request() Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 15/46] igb: Do not free q_vector unless new one was allocated Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 18/46] s390/ctcm: Fix return type of ctc{mp,}m_tx() Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 19/46] s390/netiucv: Fix return type of netiucv_tx() Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 20/46] s390/lcs: Fix return type of lcs_start_xmit() Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 28/46] net: add atomic_long_t to net_device_stats fields Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 29/46] ipv6/sit: use DEV_STATS_INC() to avoid data-races Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 30/46] mrp: introduce active flags to prevent UAF when applicant uninit Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 31/46] ppp: associate skb with a device at tx Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 33/46] ethtool: avoiding integer overflow in ethtool_phys_id() Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 41/46] net: dpaa2: publish MAC stringset to ethtool -S even if MAC is missing Sasha Levin
2022-12-19 11:54 ` Vladimir Oltean
2022-12-24 0:29 ` Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 42/46] wifi: mt76: do not run mt76u_status_worker if the device is not running Sasha Levin
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