From 631c132d062d057d4648c88e5dfa4b8a375d3442 Mon Sep 17 00:00:00 2001 From: Max Reitz Date: Mon, 4 Nov 2013 22:31:56 +0100 Subject: [PATCH 03/87] block: fix vvfat error path for enable_write_target RH-Author: Max Reitz Message-id: <1383604354-12743-6-git-send-email-mreitz@redhat.com> Patchwork-id: 55305 O-Subject: [RHEL-7.0 qemu-kvm PATCH 05/43] block: fix vvfat error path for enable_write_target Bugzilla: 1026524 RH-Acked-by: Kevin Wolf RH-Acked-by: Laszlo Ersek RH-Acked-by: Fam Zheng RH-Acked-by: Stefan Hajnoczi From: Fam Zheng BZ: 1026524 s->qcow and s->qcow_filename are allocated but not freed on error. Fix the possible leaks, remove unnecessary check for bdrv_new(), propagate ret code of bdrv_create() and also the one of enable_write_target(). Signed-off-by: Fam Zheng Reviewed-by: Laszlo Ersek Signed-off-by: Stefan Hajnoczi (cherry picked from commit 78f27bd02ceba4a2f6ac5c725f4d4410eec205ef) Signed-off-by: Max Reitz --- block/vvfat.c | 25 ++++++++++++++----------- 1 file changed, 14 insertions(+), 11 deletions(-) Signed-off-by: Miroslav Rezanina --- block/vvfat.c | 25 ++++++++++++++----------- 1 files changed, 14 insertions(+), 11 deletions(-) diff --git a/block/vvfat.c b/block/vvfat.c index 415fba3..dd0efca 100644 --- a/block/vvfat.c +++ b/block/vvfat.c @@ -1164,8 +1164,8 @@ DLOG(if (stderr == NULL) { s->sector_count = cyls * heads * secs - (s->first_sectors_number - 1); if (qemu_opt_get_bool(opts, "rw", false)) { - if (enable_write_target(s)) { - ret = -EIO; + ret = enable_write_target(s); + if (ret < 0) { goto fail; } bs->read_only = 0; @@ -2918,9 +2918,7 @@ static int enable_write_target(BDRVVVFATState *s) s->qcow_filename = g_malloc(1024); ret = get_tmp_filename(s->qcow_filename, 1024); if (ret < 0) { - g_free(s->qcow_filename); - s->qcow_filename = NULL; - return ret; + goto err; } bdrv_qcow = bdrv_find_format("qcow"); @@ -2928,18 +2926,18 @@ static int enable_write_target(BDRVVVFATState *s) set_option_parameter_int(options, BLOCK_OPT_SIZE, s->sector_count * 512); set_option_parameter(options, BLOCK_OPT_BACKING_FILE, "fat:"); - if (bdrv_create(bdrv_qcow, s->qcow_filename, options) < 0) - return -1; + ret = bdrv_create(bdrv_qcow, s->qcow_filename, options); + if (ret < 0) { + goto err; + } s->qcow = bdrv_new(""); - if (s->qcow == NULL) { - return -1; - } ret = bdrv_open(s->qcow, s->qcow_filename, NULL, BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH, bdrv_qcow); if (ret < 0) { - return ret; + bdrv_delete(s->qcow); + goto err; } #ifndef _WIN32 @@ -2952,6 +2950,11 @@ static int enable_write_target(BDRVVVFATState *s) *(void**)s->bs->backing_hd->opaque = s; return 0; + +err: + g_free(s->qcow_filename); + s->qcow_filename = NULL; + return ret; } static void vvfat_close(BlockDriverState *bs) -- 1.7.1