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Re: [PATCH] migration/savevm: release gslist after dump_vmstate_json
From: |
Dr. David Alan Gilbert |
Subject: |
Re: [PATCH] migration/savevm: release gslist after dump_vmstate_json |
Date: |
Wed, 19 Feb 2020 09:59:08 +0000 |
User-agent: |
Mutt/1.13.3 (2020-01-12) |
* address@hidden (address@hidden) wrote:
> From: Pan Nengyuan <address@hidden>
>
> 'list' forgot to free at the end of dump_vmstate_json_to_file(), although
> it's called only once, but seems like a clean code.
>
> Fix the leak as follow:
> Direct leak of 16 byte(s) in 1 object(s) allocated from:
> #0 0x7fb946abd768 in __interceptor_malloc (/lib64/libasan.so.5+0xef768)
> #1 0x7fb945eca445 in g_malloc (/lib64/libglib-2.0.so.0+0x52445)
> #2 0x7fb945ee2066 in g_slice_alloc (/lib64/libglib-2.0.so.0+0x6a066)
> #3 0x7fb945ee3139 in g_slist_prepend (/lib64/libglib-2.0.so.0+0x6b139)
> #4 0x5585db591581 in object_class_get_list_tramp
> /mnt/sdb/qemu-new/qemu/qom/object.c:1084
> #5 0x5585db590f66 in object_class_foreach_tramp
> /mnt/sdb/qemu-new/qemu/qom/object.c:1028
> #6 0x7fb945eb35f7 in g_hash_table_foreach
> (/lib64/libglib-2.0.so.0+0x3b5f7)
> #7 0x5585db59110c in object_class_foreach
> /mnt/sdb/qemu-new/qemu/qom/object.c:1038
> #8 0x5585db5916b6 in object_class_get_list
> /mnt/sdb/qemu-new/qemu/qom/object.c:1092
> #9 0x5585db335ca0 in dump_vmstate_json_to_file
> /mnt/sdb/qemu-new/qemu/migration/savevm.c:638
> #10 0x5585daa5bcbf in main /mnt/sdb/qemu-new/qemu/vl.c:4420
> #11 0x7fb941204812 in __libc_start_main ../csu/libc-start.c:308
> #12 0x5585da29420d in _start
> (/mnt/sdb/qemu-new/qemu/build/x86_64-softmmu/qemu-system-x86_64+0x27f020d)
>
> Indirect leak of 7472 byte(s) in 467 object(s) allocated from:
> #0 0x7fb946abd768 in __interceptor_malloc (/lib64/libasan.so.5+0xef768)
> #1 0x7fb945eca445 in g_malloc (/lib64/libglib-2.0.so.0+0x52445)
> #2 0x7fb945ee2066 in g_slice_alloc (/lib64/libglib-2.0.so.0+0x6a066)
> #3 0x7fb945ee3139 in g_slist_prepend (/lib64/libglib-2.0.so.0+0x6b139)
> #4 0x5585db591581 in object_class_get_list_tramp
> /mnt/sdb/qemu-new/qemu/qom/object.c:1084
> #5 0x5585db590f66 in object_class_foreach_tramp
> /mnt/sdb/qemu-new/qemu/qom/object.c:1028
> #6 0x7fb945eb35f7 in g_hash_table_foreach
> (/lib64/libglib-2.0.so.0+0x3b5f7)
> #7 0x5585db59110c in object_class_foreach
> /mnt/sdb/qemu-new/qemu/qom/object.c:1038
> #8 0x5585db5916b6 in object_class_get_list
> /mnt/sdb/qemu-new/qemu/qom/object.c:1092
> #9 0x5585db335ca0 in dump_vmstate_json_to_file
> /mnt/sdb/qemu-new/qemu/migration/savevm.c:638
> #10 0x5585daa5bcbf in main /mnt/sdb/qemu-new/qemu/vl.c:4420
> #11 0x7fb941204812 in __libc_start_main ../csu/libc-start.c:308
> #12 0x5585da29420d in _start
> (/mnt/sdb/qemu-new/qemu/build/x86_64-softmmu/qemu-system-x86_64+0x27f020d)
>
> Reported-by: Euler Robot <address@hidden>
Good robot!
> Signed-off-by: Pan Nengyuan <address@hidden>
> ---
> migration/savevm.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/migration/savevm.c b/migration/savevm.c
> index f19cb9ec7a..60e6ea8a8d 100644
> --- a/migration/savevm.c
> +++ b/migration/savevm.c
> @@ -665,6 +665,7 @@ void dump_vmstate_json_to_file(FILE *out_file)
> }
> fprintf(out_file, "\n}\n");
> fclose(out_file);
> + g_slist_free(list);
Reviewed-by: Dr. David Alan Gilbert <address@hidden>
> }
>
> static uint32_t calculate_new_instance_id(const char *idstr)
> --
> 2.18.2
>
--
Dr. David Alan Gilbert / address@hidden / Manchester, UK