qcow_filename is allocated in enable_write_target(), called by
vvfat_open(), but never free'd. Free it in vvfat_close().
This fixes (QEMU built with --enable-sanitizers):
Direct leak of 4096 byte(s) in 1 object(s) allocated from:
#0 0x55d7a363773f in malloc
(/mnt/scratch/qemu/sanitizer/qemu-system-x86_64+0x1dab73f)
#1 0x7f55c6447958 in g_malloc (/lib64/libglib-2.0.so.0+0x58958)
#2 0x55d7a5e123aa in vvfat_open block/vvfat.c:1236:19
#3 0x55d7a5a5363f in bdrv_open_driver block.c:1526:15
#4 0x55d7a5a9d369 in bdrv_open_common block.c:1802:11
#5 0x55d7a5a609f1 in bdrv_open_inherit block.c:3444:11
#6 0x55d7a5a65411 in bdrv_open_child_bs block.c:3079:10
#7 0x55d7a5a60079 in bdrv_open_inherit block.c:3391:19
#8 0x55d7a5a65da3 in bdrv_open block.c:3537:12
#9 0x55d7a5b33f6a in blk_new_open block/block-backend.c:421:10
#10 0x55d7a5a0a33e in blockdev_init blockdev.c:610:15
#11 0x55d7a5a088e7 in drive_new blockdev.c:994:11
#12 0x55d7a51b10c4 in drive_init_func softmmu/vl.c:636:12
#13 0x55d7a620e148 in qemu_opts_foreach util/qemu-option.c:1167:14
#14 0x55d7a51b0e20 in configure_blockdev softmmu/vl.c:695:9
#15 0x55d7a51a70b5 in qemu_create_early_backends softmmu/vl.c:1895:5
#16 0x55d7a519bf87 in qemu_init softmmu/vl.c:3551:5
#17 0x55d7a366f619 in main softmmu/main.c:49:5
Fixes: 8475ea48544 ("block/vvfat: Do not unref qcow on closing backing bdrv")
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
block/vvfat.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/block/vvfat.c b/block/vvfat.c
index 54807f82ca1..5a4a7915220 100644
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -3233,6 +3233,7 @@ static void vvfat_close(BlockDriverState *bs)
array_free(&(s->directory));
array_free(&(s->mapping));
g_free(s->cluster_buffer);
+ g_free(s->qcow_filename);
if (s->qcow) {
migrate_del_blocker(s->migration_blocker);
--
2.26.3