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[84.115.213.103]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a6f56da3385sm688365766b.24.2024.06.19.12.43.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Jun 2024 12:43:01 -0700 (PDT) From: Javier Carrasco Date: Wed, 19 Jun 2024 21:42:45 +0200 Subject: [PATCH v2 2/2] USB: serial: garmin_gps: use struct_size to allocate pkt Precedence: bulk X-Mailing-List: linux-hardening@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240619-garmin_gps_counted_by-v2-2-f82f10ebbf28@gmail.com> References: <20240619-garmin_gps_counted_by-v2-0-f82f10ebbf28@gmail.com> In-Reply-To: <20240619-garmin_gps_counted_by-v2-0-f82f10ebbf28@gmail.com> To: Johan Hovold , Greg Kroah-Hartman , Kees Cook , "Gustavo A. R. Silva" , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, llvm@lists.linux.dev, Javier Carrasco X-Mailer: b4 0.14-dev X-Developer-Signature: v=1; a=ed25519-sha256; t=1718826176; l=869; i=javier.carrasco.cruz@gmail.com; s=20240312; h=from:subject:message-id; bh=qCJk9bWEc+/fuCHJqn77Np+/NCaJz6B237shZlGk7wA=; b=cexK0HonegmOr1iAcrxTSFtX32J5Razx8ZpgrRL6ih52oWsn3hR9bgc/J3g0tkdX6cLrnZG8q eEZ8mKg7vbcBWjSIG2VzRHf37QEneJDUhAV9LGoM2IcgC4OZhrLYD1o X-Developer-Key: i=javier.carrasco.cruz@gmail.com; a=ed25519; pk=lzSIvIzMz0JhJrzLXI0HAdPwsNPSSmEn6RbS+PTS9aQ= Use the struct_size macro to calculate the size of the pkt, which includes a trailing flexible array. Suggested-by: Nathan Chancellor Signed-off-by: Javier Carrasco Reviewed-by: Gustavo A. R. Silva Reviewed-by: Kees Cook --- drivers/usb/serial/garmin_gps.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/usb/serial/garmin_gps.c b/drivers/usb/serial/garmin_gps.c index 57df6ad183ff..6d6ec7eed87c 100644 --- a/drivers/usb/serial/garmin_gps.c +++ b/drivers/usb/serial/garmin_gps.c @@ -267,8 +267,7 @@ static int pkt_add(struct garmin_data *garmin_data_p, /* process only packets containing data ... */ if (data_length) { - pkt = kmalloc(sizeof(struct garmin_packet)+data_length, - GFP_ATOMIC); + pkt = kmalloc(struct_size(pkt, data, data_length), GFP_ATOMIC); if (!pkt) return 0;