Date: Thu, 22 Nov 2018 16:55:09 +0000 (UTC) From: Ed Maste <emaste@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r340771 - head/sys/dev/proto Message-ID: <201811221655.wAMGt9p5089696@repo.freebsd.org>
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Author: emaste Date: Thu Nov 22 16:55:09 2018 New Revision: 340771 URL: https://svnweb.freebsd.org/changeset/base/340771 Log: proto: change device permissions to 0600 C Turt reports that the driver is not thread safe and may have exploitable races. Note that the proto device is intended for prototyping and development, and is not for use on production systems. From the man page: SECURITY CONSIDERATIONS Because programs have direct access to the hardware, the proto driver is inherently insecure. It is not advisable to use this driver on a production machine. The proto device is not included in any of FreeBSD's kernel config files (although the module is built). The issues in the proto device still need to be fixed, and the device is inherently (and intentionally) insecure, but it might as well be limited to root only. admbugs: 782 Reported by: C Turt <ecturt@gmail.com> MFC after: 3 days Sponsored by: The FreeBSD Foundation Modified: head/sys/dev/proto/proto_core.c Modified: head/sys/dev/proto/proto_core.c ============================================================================== --- head/sys/dev/proto/proto_core.c Thu Nov 22 16:53:30 2018 (r340770) +++ head/sys/dev/proto/proto_core.c Thu Nov 22 16:55:09 2018 (r340771) @@ -196,7 +196,7 @@ proto_attach(device_t dev) case SYS_RES_MEMORY: case SYS_RES_IOPORT: r->r_size = rman_get_size(r->r_d.res); - r->r_u.cdev = make_dev(&proto_devsw, res, 0, 0, 0666, + r->r_u.cdev = make_dev(&proto_devsw, res, 0, 0, 0600, "proto/%s/%02x.%s", device_get_desc(dev), r->r_rid, (r->r_type == SYS_RES_IOPORT) ? "io" : "mem"); r->r_u.cdev->si_drv1 = sc; @@ -204,7 +204,7 @@ proto_attach(device_t dev) break; case PROTO_RES_PCICFG: r->r_size = 4096; - r->r_u.cdev = make_dev(&proto_devsw, res, 0, 0, 0666, + r->r_u.cdev = make_dev(&proto_devsw, res, 0, 0, 0600, "proto/%s/pcicfg", device_get_desc(dev)); r->r_u.cdev->si_drv1 = sc; r->r_u.cdev->si_drv2 = r; @@ -212,7 +212,7 @@ proto_attach(device_t dev) case PROTO_RES_BUSDMA: r->r_d.busdma = proto_busdma_attach(sc); r->r_size = 0; /* no read(2) nor write(2) */ - r->r_u.cdev = make_dev(&proto_devsw, res, 0, 0, 0666, + r->r_u.cdev = make_dev(&proto_devsw, res, 0, 0, 0600, "proto/%s/busdma", device_get_desc(dev)); r->r_u.cdev->si_drv1 = sc; r->r_u.cdev->si_drv2 = r;
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