Message ID | 20210727205855.411487-37-keescook@chromium.org |
---|---|
State | New |
Headers | show
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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id y9sm5034698pgr.10.2021.07.27.14.16.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Jul 2021 14:16:50 -0700 (PDT) From: Kees Cook <keescook@chromium.org> To: linux-hardening@vger.kernel.org Cc: Kees Cook <keescook@chromium.org>, "Gustavo A. R. Silva" <gustavoars@kernel.org>, Keith Packard <keithpac@amazon.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-staging@lists.linux.dev, linux-block@vger.kernel.org, linux-kbuild@vger.kernel.org, clang-built-linux@googlegroups.com Subject: [PATCH 36/64] scsi: ibmvscsi: Avoid multi-field memset() overflow by aiming at srp Date: Tue, 27 Jul 2021 13:58:27 -0700 Message-Id: <20210727205855.411487-37-keescook@chromium.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210727205855.411487-1-keescook@chromium.org> References: <20210727205855.411487-1-keescook@chromium.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1097; h=from:subject; bh=Nq1NUVDlF5HB2sL3wLI4PgmWfjw6IdyQL7mY1ITGnck=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBhAHOI21reOQg8BrkfHddEuElFGDIapR2heYw3xo22 cpdsHDuJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCYQBziAAKCRCJcvTf3G3AJvhsD/ 9f+BKlmaFnyRZQcn1rlNDY2vh+rNTRxOLWqPkDfUPDZZ97wHv4DBEpdLaXiuhCZf608S+816myOXX+ nT5UFOcdgLS8KSNQsCYAiZ8y6i6Tg4+eSRQunUnuVzVL3O98L0xqB46WaeeYx70RA6j5DnKbLOchNN AjaSeeQx0pnsg9cSycqn8lvZyqETRhU90TKbfnJtqIX4NEONgrTzdm8ZKbhe4RYUabvOxhjbiw7+j9 yYitnuR8to7ti1pifqARyJJrmpvyFicfspMm+frwRLM1W6LA/s7nG8iAQ5sTn/uzoB9cCj+SweTPkR m+AsViv0F1qTlCBahXchUqn2qo8JD0BZvitJ3EW1JR1OuFzTXkm4GT0+sh7Nv+hcTpQyriLzuTKuzz 4K32VkFr/Ngh4JofcvGrq47NeW+rPy+OefZwviXvKsNZmypkxuWROPihUMZHdjHbE7DCVwLoKFC64l rmccyM+XL5CwKYV01CmnjIZnKBVjuCh5PKcGpt7afr5ogG6tc2TUnvcY8lifwBGzsgS0nVOPT47wjG me8YQ4+eL1qJGzSl6NZ2krfvFMNxWRLa1UuLhO6PDmXxr8+1VYVWWQltkkcbKYEWarHuOvOxN+DOaB KeSbdbqc2xxk6w2cz+t6Eez7On01QP+vgWhE9arlnKCLSEH75mw7tmX/ZlrA== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: <linux-wireless.vger.kernel.org> X-Mailing-List: linux-wireless@vger.kernel.org |
Series |
Introduce strict memcpy() bounds checking
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expand
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diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c index e6a3eaaa57d9..7e8beb42d2d3 100644 --- a/drivers/scsi/ibmvscsi/ibmvscsi.c +++ b/drivers/scsi/ibmvscsi/ibmvscsi.c @@ -1055,8 +1055,8 @@ static int ibmvscsi_queuecommand_lck(struct scsi_cmnd *cmnd, return SCSI_MLQUEUE_HOST_BUSY; /* Set up the actual SRP IU */ + memset(&evt_struct->iu.srp, 0x00, SRP_MAX_IU_LEN); srp_cmd = &evt_struct->iu.srp.cmd; - memset(srp_cmd, 0x00, SRP_MAX_IU_LEN); srp_cmd->opcode = SRP_CMD; memcpy(srp_cmd->cdb, cmnd->cmnd, sizeof(srp_cmd->cdb)); int_to_scsilun(lun, &srp_cmd->lun);
In preparation for FORTIFY_SOURCE performing compile-time and run-time field bounds checking for memset(), avoid intentionally writing across neighboring fields. Instead of writing beyond the end of evt_struct->iu.srp.cmd, target the upper union (evt_struct->iu.srp) instead, as that's what is being wiped. Signed-off-by: Kees Cook <keescook@chromium.org> --- drivers/scsi/ibmvscsi/ibmvscsi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)