Date: Sat, 19 Oct 2019 08:08:06 +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: r353757 - head/stand/libsa/zfs Message-ID: <201910190808.x9J886Jk089303@repo.freebsd.org>
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Author: tsoome Date: Sat Oct 19 08:08:06 2019 New Revision: 353757 URL: https://svnweb.freebsd.org/changeset/base/353757 Log: loader: zfs_fmtdev can crash when pool discovery did fail and we have no spa When zfs probe did fail and no spa was created, but zfs_fmtdev() is called, we will crash while dereferencing spa (NULL pointer dereference). MFC after: 1 week Modified: head/stand/libsa/zfs/zfs.c Modified: head/stand/libsa/zfs/zfs.c ============================================================================== --- head/stand/libsa/zfs/zfs.c Sat Oct 19 07:53:20 2019 (r353756) +++ head/stand/libsa/zfs/zfs.c Sat Oct 19 08:08:06 2019 (r353757) @@ -769,11 +769,16 @@ zfs_fmtdev(void *vdev) if (dev->dd.d_dev->dv_type != DEVT_ZFS) return (buf); - if (dev->pool_guid == 0) { - spa = STAILQ_FIRST(&zfs_pools); + /* Do we have any pools? */ + spa = STAILQ_FIRST(&zfs_pools); + if (spa == NULL) + return (buf); + + if (dev->pool_guid == 0) dev->pool_guid = spa->spa_guid; - } else + else spa = spa_find_by_guid(dev->pool_guid); + if (spa == NULL) { printf("ZFS: can't find pool by guid\n"); return (buf);
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