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From: zkabelac@sourceware.org To: lvm-devel@redhat.com, lvm2-cvs@sourceware.org Subject: LVM2 ./WHATS_NEW lib/format_text/import_vsn1.c ... Date: Sun, 13 Mar 2011 23:05:00 -0000 [thread overview] Message-ID: <20110313230549.16622.qmail@sourceware.org> (raw) CVSROOT: /cvs/lvm2 Module name: LVM2 Changes by: zkabelac@sourceware.org 2011-03-13 23:05:49 Modified files: . : WHATS_NEW lib/format_text: import_vsn1.c lib/format1 : import-export.c lib/metadata : metadata.c Log message: Fix allocation of system_id As code uses strncpy(system_id, NAME_LEN) and doesn't set '\0' Fix it by always allocating NAME_LEN + 1 buffer size and with zalloc we always get '\0' as the last byte. This bug may trigger some unexpected behavior of the string operation code - depends on the pool allocator. FIXME: refactor this code to alloc_vg. Patches: http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/WHATS_NEW.diff?cvsroot=lvm2&r1=1.1953&r2=1.1954 http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/lib/format_text/import_vsn1.c.diff?cvsroot=lvm2&r1=1.84&r2=1.85 http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/lib/format1/import-export.c.diff?cvsroot=lvm2&r1=1.116&r2=1.117 http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/lib/metadata/metadata.c.diff?cvsroot=lvm2&r1=1.448&r2=1.449 --- LVM2/WHATS_NEW 2011/03/13 22:57:51 1.1953 +++ LVM2/WHATS_NEW 2011/03/13 23:05:48 1.1954 @@ -1,5 +1,6 @@ Version 2.02.85 - =================================== + Fix allocation of system_id buffer in volume_group structure. Fix buffer allocation in build_dm_uuid(). Fix readlink usage inside get_primary_dev(). Use format instance mempool where possible and adequate. --- LVM2/lib/format_text/import_vsn1.c 2011/03/11 14:50:15 1.84 +++ LVM2/lib/format_text/import_vsn1.c 2011/03/13 23:05:48 1.85 @@ -666,7 +666,7 @@ if (!(vg = alloc_vg("read_vg", fid->fmt->cmd, vgn->key))) return_NULL; - if (!(vg->system_id = dm_pool_zalloc(vg->vgmem, NAME_LEN))) + if (!(vg->system_id = dm_pool_zalloc(vg->vgmem, NAME_LEN + 1))) goto_bad; vgn = vgn->child; --- LVM2/lib/format1/import-export.c 2010/11/30 22:57:35 1.116 +++ LVM2/lib/format1/import-export.c 2011/03/13 23:05:48 1.117 @@ -225,7 +225,7 @@ if (!(vg->name = dm_pool_strdup(mem, (char *)dl->pvd.vg_name))) return_0; - if (!(vg->system_id = dm_pool_alloc(mem, NAME_LEN))) + if (!(vg->system_id = dm_pool_zalloc(mem, NAME_LEN + 1))) return_0; *vg->system_id = '\0'; --- LVM2/lib/metadata/metadata.c 2011/03/11 15:10:17 1.448 +++ LVM2/lib/metadata/metadata.c 2011/03/13 23:05:49 1.449 @@ -934,7 +934,7 @@ } vg->status = (RESIZEABLE_VG | LVM_READ | LVM_WRITE); - if (!(vg->system_id = dm_pool_alloc(vg->vgmem, NAME_LEN))) + if (!(vg->system_id = dm_pool_zalloc(vg->vgmem, NAME_LEN + 1))) goto_bad; *vg->system_id = '\0';
next reply other threads:[~2011-03-13 23:05 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-03-13 23:05 zkabelac [this message] -- strict thread matches above, loose matches on Subject: below -- 2005-05-09 16:59 agk
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