Message ID | 20220504014440.3697851-9-keescook@chromium.org (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id s11-20020a170902b18b00b0015e8d4eb258sm7004776plr.162.2022.05.03.18.47.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 May 2022 18:47:39 -0700 (PDT) From: Kees Cook <keescook@chromium.org> To: "Gustavo A . R . Silva" <gustavoars@kernel.org> Cc: Kees Cook <keescook@chromium.org>, Luca Coelho <luciano.coelho@intel.com>, Kalle Valo <kvalo@kernel.org>, "David S. Miller" <davem@davemloft.net>, Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>, Johannes Berg <johannes@sipsolutions.net>, Gregory Greenman <gregory.greenman@intel.com>, Eric Dumazet <edumazet@google.com>, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, Alexei Starovoitov <ast@kernel.org>, alsa-devel@alsa-project.org, Al Viro <viro@zeniv.linux.org.uk>, Andrew Gabbasov <andrew_gabbasov@mentor.com>, Andrew Morton <akpm@linux-foundation.org>, Andy Gross <agross@kernel.org>, Andy Lavr <andy.lavr@gmail.com>, Arend van Spriel <aspriel@gmail.com>, Baowen Zheng <baowen.zheng@corigine.com>, Bjorn Andersson <bjorn.andersson@linaro.org>, Boris Ostrovsky <boris.ostrovsky@oracle.com>, Bradley Grove <linuxdrivers@attotech.com>, brcm80211-dev-list.pdl@broadcom.com, Christian Brauner <brauner@kernel.org>, =?utf-8?q?Christian_G=C3=B6ttsche?= <cgzones@googlemail.com>, Christian Lamparter <chunkeey@googlemail.com>, Chris Zankel <chris@zankel.net>, Cong Wang <cong.wang@bytedance.com>, Daniel Axtens <dja@axtens.net>, Daniel Vetter <daniel.vetter@ffwll.ch>, Dan Williams <dan.j.williams@intel.com>, David Gow <davidgow@google.com>, David Howells <dhowells@redhat.com>, Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>, devicetree@vger.kernel.org, Dexuan Cui <decui@microsoft.com>, Dmitry Kasatkin <dmitry.kasatkin@gmail.com>, Eli Cohen <elic@nvidia.com>, Eric Paris <eparis@parisplace.org>, Eugeniu Rosca <erosca@de.adit-jv.com>, Felipe Balbi <balbi@kernel.org>, Francis Laniel <laniel_francis@privacyrequired.com>, Frank Rowand <frowand.list@gmail.com>, Franky Lin <franky.lin@broadcom.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Guenter Roeck <linux@roeck-us.net>, Haiyang Zhang <haiyangz@microsoft.com>, Hante Meuleman <hante.meuleman@broadcom.com>, Herbert Xu <herbert@gondor.apana.org.au>, Hulk Robot <hulkci@huawei.com>, "James E.J. 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Srinivasan" <kys@microsoft.com>, Lars-Peter Clausen <lars@metafoo.de>, Lee Jones <lee.jones@linaro.org>, Leon Romanovsky <leon@kernel.org>, Liam Girdwood <lgirdwood@gmail.com>, linux1394-devel@lists.sourceforge.net, linux-afs@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-bluetooth@vger.kernel.org, linux-hardening@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-integrity@vger.kernel.org, linux-rdma@vger.kernel.org, linux-scsi@vger.kernel.org, linux-security-module@vger.kernel.org, linux-usb@vger.kernel.org, linux-xtensa@linux-xtensa.org, llvm@lists.linux.dev, Loic Poulain <loic.poulain@linaro.org>, Louis Peens <louis.peens@corigine.com>, Luiz Augusto von Dentz <luiz.dentz@gmail.com>, Marc Dionne <marc.dionne@auristor.com>, Marcel Holtmann <marcel@holtmann.org>, Mark Brown <broonie@kernel.org>, "Martin K. Petersen" <martin.petersen@oracle.com>, Max Filippov <jcmvbkbc@gmail.com>, Mimi Zohar <zohar@linux.ibm.com>, Muchun Song <songmuchun@bytedance.com>, Nathan Chancellor <nathan@kernel.org>, Nick Desaulniers <ndesaulniers@google.com>, =?utf-8?q?Nuno_S=C3=A1?= <nuno.sa@analog.com>, Paul Moore <paul@paul-moore.com>, Rich Felker <dalias@aerifal.cx>, Rob Herring <robh+dt@kernel.org>, Russell King <linux@armlinux.org.uk>, selinux@vger.kernel.org, "Serge E. Hallyn" <serge@hallyn.com>, SHA-cyfmac-dev-list@infineon.com, Simon Horman <simon.horman@corigine.com>, Stefano Stabellini <sstabellini@kernel.org>, Stefan Richter <stefanr@s5r6.in-berlin.de>, Steffen Klassert <steffen.klassert@secunet.com>, Stephen Hemminger <sthemmin@microsoft.com>, Stephen Smalley <stephen.smalley.work@gmail.com>, Tadeusz Struk <tadeusz.struk@linaro.org>, Takashi Iwai <tiwai@suse.com>, Tom Rix <trix@redhat.com>, Udipto Goswami <quic_ugoswami@quicinc.com>, Vincenzo Frascino <vincenzo.frascino@arm.com>, wcn36xx@lists.infradead.org, Wei Liu <wei.liu@kernel.org>, xen-devel@lists.xenproject.org, Xiu Jianfeng <xiujianfeng@huawei.com>, Yang Yingliang <yangyingliang@huawei.com> Subject: [PATCH 08/32] iwlwifi: mvm: Use mem_to_flex_dup() with struct ieee80211_key_conf Date: Tue, 3 May 2022 18:44:17 -0700 Message-Id: <20220504014440.3697851-9-keescook@chromium.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220504014440.3697851-1-keescook@chromium.org> References: <20220504014440.3697851-1-keescook@chromium.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2437; h=from:subject; bh=kqrSs6qCwh+Lec2OX97eOmuBYGTxbYZO/oveyYvsSyU=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBicdqCYob8Le101GWyzNPT8SUQLcWbnMdLaBLnNMKi PFuQ5FWJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCYnHaggAKCRCJcvTf3G3AJrrrD/ 41pLe3vLmy1DT131k402AnWkbvKKTeLHCfdZOZOBG/caJXqmnpOxwil6RAxg5u6hN5hKr+gqoQg3jM PjxMAKOnj4UigmA4/hMbFkpe2UAFQce0nHR1yDX9KirGdKMvnAq1KmeZTOvAK12ubsFuw1otFOoOY9 il9bAkoOcb67DGRv3WnjeBeJAIZesPeob+hkdIGXBLwjDM9HsKNWnS0CO4faN9H2UB5yHtan5AE3fY ejNDT+faux7HktJ5LMXGuFK8hNTMT6DzsBUJMh/VqnJUQfz4J8NZnt1C2fhjm2UKTMJJXaSL2VTIls +E869VhJZmwXhnjNOoXxgs2ypZPdZn7bJMJt9MVXQCWOJ/r5Z4HL//NjQwlMsxa5eN/OtY6fhuJmQa Kt081e3mYWawz+yHoGLyrxfgEVcaxPetNNZbtFWAguSAm+2kDAVJoYtbd1P/PeFNxjV9iclz5KMbsR vfwg2FoAJ4/UE7uv/e9hwMg874lDgZBVxecyw2BfPg0CFqa9KiQ4QmpYRs8HaRBhJQv/jDtfxWqnVh RhanF8E/YIf8Mwjneo+/nQykVNYJP+mnin2t2PXGGQTtyZfdgc4mogRxpnvnUcDOoGAndvfOm8tHL7 lnC6lEffqiIvIoLzddv1Yrb2IU0R/a/tFtHusn7zJ+WlS695vP3r1pDWMDUg== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: <linux-integrity.vger.kernel.org> X-Mailing-List: linux-integrity@vger.kernel.org |
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Introduce flexible array struct memcpy() helpers
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expand
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diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c index 406f0a50a5bf..23cade528dcf 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c @@ -4108,7 +4108,7 @@ int iwl_mvm_add_pasn_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif, int ret; u16 queue; struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); - struct ieee80211_key_conf *keyconf; + struct ieee80211_key_conf *keyconf = NULL; ret = iwl_mvm_allocate_int_sta(mvm, sta, 0, NL80211_IFTYPE_UNSPECIFIED, @@ -4122,15 +4122,11 @@ int iwl_mvm_add_pasn_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif, if (ret) goto out; - keyconf = kzalloc(sizeof(*keyconf) + key_len, GFP_KERNEL); - if (!keyconf) { + if (mem_to_flex_dup(&keyconf, key, key_len, GFP_KERNEL)) { ret = -ENOBUFS; goto out; } - keyconf->cipher = cipher; - memcpy(keyconf->key, key, key_len); - keyconf->keylen = key_len; ret = iwl_mvm_send_sta_key(mvm, sta->sta_id, keyconf, false, 0, NULL, 0, 0, true); diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 75880fc70700..4abe52963a96 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -1890,8 +1890,8 @@ struct ieee80211_key_conf { u8 hw_key_idx; s8 keyidx; u16 flags; - u8 keylen; - u8 key[]; + DECLARE_FLEX_ARRAY_ELEMENTS_COUNT(u8, keylen); + DECLARE_FLEX_ARRAY_ELEMENTS(u8, key); }; #define IEEE80211_MAX_PN_LEN 16
As part of the work to perform bounds checking on all memcpy() uses, replace the open-coded a deserialization of bytes out of memory into a trailing flexible array by using a flex_array.h helper to perform the allocation, bounds checking, and copying. Cc: Luca Coelho <luciano.coelho@intel.com> Cc: Kalle Valo <kvalo@kernel.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Paolo Abeni <pabeni@redhat.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Gregory Greenman <gregory.greenman@intel.com> Cc: Eric Dumazet <edumazet@google.com> Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> --- drivers/net/wireless/intel/iwlwifi/mvm/sta.c | 8 ++------ include/net/mac80211.h | 4 ++-- 2 files changed, 4 insertions(+), 8 deletions(-)