From d09b8364d9f89c9d5f36dc983c4d4a36bb7388b9 Mon Sep 17 00:00:00 2001 From: Pan Nengyuan Date: Thu, 16 Jan 2020 17:29:29 +0800 Subject: [PATCH] block: fix memleaks in bdrv_refresh_filename If we call the qmp 'query-block' while qemu is working on 'block-commit', it will cause memleaks. The memory leak stack is as follow: Indirect leak of 12360 byte(s) in 3 object(s) allocated from: #0 0x7f80f0b6d970 in __interceptor_calloc (/lib64/libasan.so.5+0xef970) #1 0x7f80ee86049d in g_malloc0 (/lib64/libglib-2.0.so.0+0x5249d) #2 0x55ea95b5bb67 in qdict_new /mnt/sdb/qemu/qobject/qdict.c #3 0x55ea956cd043 in bdrv_refresh_filename /mnt/sdb/qemu/block.c #4 0x55ea956cc950 in bdrv_refresh_filename /mnt/sdb/qemu/block.c #5 0x55ea956cc950 in bdrv_refresh_filename /mnt/sdb/qemu/block.c #6 0x55ea956cc950 in bdrv_refresh_filename /mnt/sdb/qemu/block.c #7 0x55ea958818ea in bdrv_block_device_info /mnt/sdb/qemu/block/qapi.c #8 0x55ea958879de in bdrv_query_info /mnt/sdb/qemu/block/qapi.c #9 0x55ea9588b58f in qmp_query_block /mnt/sdb/qemu/block/qapi.c #10 0x55ea95567392 in qmp_marshal_query_block qapi/qapi-commands-block-core.c Indirect leak of 4120 byte(s) in 1 object(s) allocated from: #0 0x7f80f0b6d970 in __interceptor_calloc (/lib64/libasan.so.5+0xef970) #1 0x7f80ee86049d in g_malloc0 (/lib64/libglib-2.0.so.0+0x5249d) #2 0x55ea95b5bb67 in qdict_new /mnt/sdb/qemu/qobject/qdict.c #3 0x55ea956cd043 in bdrv_refresh_filename /mnt/sdb/qemu/block.c #4 0x55ea956cc950 in bdrv_refresh_filename /mnt/sdb/qemu/block.c #5 0x55ea956cc950 in bdrv_refresh_filename /mnt/sdb/qemu/block.c #6 0x55ea9569f301 in bdrv_backing_attach /mnt/sdb/qemu/block.c #7 0x55ea956a99dd in bdrv_replace_child_noperm /mnt/sdb/qemu/block.c #8 0x55ea956b9b53 in bdrv_replace_node /mnt/sdb/qemu/block.c #9 0x55ea956b9e49 in bdrv_append /mnt/sdb/qemu/block.c #10 0x55ea958c3472 in commit_start /mnt/sdb/qemu/block/commit.c #11 0x55ea94b68ab0 in qmp_block_commit /mnt/sdb/qemu/blockdev.c Reported-by: Euler Robot Signed-off-by: Pan Nengyuan --- block.c | 1 + 1 file changed, 1 insertion(+) diff --git a/block.c b/block.c index 9ae5c0e..52bad05 100644 --- a/block.c +++ b/block.c @@ -6048,6 +6048,7 @@ void bdrv_refresh_filename(BlockDriverState *bs) child->bs->exact_filename); pstrcpy(bs->filename, sizeof(bs->filename), child->bs->filename); + qobject_unref(child->bs->full_open_options); bs->full_open_options = qobject_ref(child->bs->full_open_options); return; -- 1.8.3.1