Author: markj Date: Wed Dec 18 18:44:16 2019 New Revision: 355885 URL: https://svnweb.freebsd.org/changeset/base/355885
Log: oce: Tighten input validation in the SIOCGI2C handler. Missing validation meant that it was possible to read 8 bytes beyond the end of sfp_vpd_dump_buffer. Reported by: Ilja Van Sprundel <[email protected]> Reviewed by: delphij, ram MFC after: 3 days Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D22859 Modified: head/sys/dev/oce/oce_if.c Modified: head/sys/dev/oce/oce_if.c ============================================================================== --- head/sys/dev/oce/oce_if.c Wed Dec 18 18:43:44 2019 (r355884) +++ head/sys/dev/oce/oce_if.c Wed Dec 18 18:44:16 2019 (r355885) @@ -593,27 +593,26 @@ oce_ioctl(struct ifnet *ifp, u_long command, caddr_t d if (rc) break; - if (i2c.dev_addr != PAGE_NUM_A0 && - i2c.dev_addr != PAGE_NUM_A2) { + if (i2c.dev_addr == PAGE_NUM_A0) { + offset = i2c.offset; + } else if (i2c.dev_addr == PAGE_NUM_A2) { + offset = TRANSCEIVER_A0_SIZE + i2c.offset; + } else { rc = EINVAL; break; } - if (i2c.len > sizeof(i2c.data)) { + if (i2c.len > sizeof(i2c.data) || + i2c.len + offset > sizeof(sfp_vpd_dump_buffer)) { rc = EINVAL; break; } rc = oce_mbox_read_transrecv_data(sc, i2c.dev_addr); - if(rc) { + if (rc) { rc = -rc; break; } - - if (i2c.dev_addr == PAGE_NUM_A0) - offset = i2c.offset; - else - offset = TRANSCEIVER_A0_SIZE + i2c.offset; memcpy(&i2c.data[0], &sfp_vpd_dump_buffer[offset], i2c.len); _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "[email protected]"
