Date: Wed, 7 Nov 2018 21:36:52 +0000 (UTC) From: Toomas Soome <tsoome@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r340240 - head/stand/common Message-ID: <201811072136.wA7Laq8q042277@repo.freebsd.org>
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Author: tsoome Date: Wed Nov 7 21:36:52 2018 New Revision: 340240 URL: https://svnweb.freebsd.org/changeset/base/340240 Log: loader: ptable_open() check for ptable_cd9660read result is wrong The ptable_*read() functions return NULL on read errors (and partition table closed as an side effect). The ptable_open must check the return value and act properly. PR: 232483 Reported by: lev Reviewed by: lev,cem Differential Revision: https://reviews.freebsd.org/D17890 Modified: head/stand/common/part.c Modified: head/stand/common/part.c ============================================================================== --- head/stand/common/part.c Wed Nov 7 21:01:14 2018 (r340239) +++ head/stand/common/part.c Wed Nov 7 21:36:52 2018 (r340240) @@ -675,10 +675,12 @@ ptable_open(void *dev, uint64_t sectors, uint16_t sect table->type = PTABLE_NONE; STAILQ_INIT(&table->entries); - if (ptable_iso9660read(table, dev, dread) != NULL) { - if (table->type == PTABLE_ISO9660) - goto out; - } + if (ptable_iso9660read(table, dev, dread) == NULL) { + /* Read error. */ + table = NULL; + goto out; + } else if (table->type == PTABLE_ISO9660) + goto out; #ifdef LOADER_VTOC8_SUPPORT if (be16dec(buf + offsetof(struct vtoc8, magic)) == VTOC_MAGIC) {
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