Re: [PATCH] vl: Don't mismatch g_strsplit()/g_free()

[Laurent Vivier <laurent@vivier.eu>]

Le 10/01/2020 à 04:16, pannengyuan@huawei.com a écrit :
> From: Pan Nengyuan <pannengyuan@huawei.com>
> 
> It's a mismatch between g_strsplit and g_free, it will cause a memory leak as follow:
> 
> [root@localhost]# ./aarch64-softmmu/qemu-system-aarch64 -accel help
> Accelerators supported in QEMU binary:
> tcg
> kvm
> =================================================================
> ==1207900==ERROR: LeakSanitizer: detected memory leaks
> 
> Direct leak of 8 byte(s) in 2 object(s) allocated from:
>     #0 0xfffd700231cb in __interceptor_malloc (/lib64/libasan.so.4+0xd31cb)
>     #1 0xfffd6ec57163 in g_malloc (/lib64/libglib-2.0.so.0+0x57163)
>     #2 0xfffd6ec724d7 in g_strndup (/lib64/libglib-2.0.so.0+0x724d7)
>     #3 0xfffd6ec73d3f in g_strsplit (/lib64/libglib-2.0.so.0+0x73d3f)
>     #4 0xaaab66be5077 in main /mnt/sdc/qemu-master/qemu-4.2.0-rc0/vl.c:3517
>     #5 0xfffd6e140b9f in __libc_start_main (/lib64/libc.so.6+0x20b9f)
>     #6 0xaaab66bf0f53  (./build/aarch64-softmmu/qemu-system-aarch64+0x8a0f53)
> 
> Direct leak of 2 byte(s) in 2 object(s) allocated from:
>     #0 0xfffd700231cb in __interceptor_malloc (/lib64/libasan.so.4+0xd31cb)
>     #1 0xfffd6ec57163 in g_malloc (/lib64/libglib-2.0.so.0+0x57163)
>     #2 0xfffd6ec7243b in g_strdup (/lib64/libglib-2.0.so.0+0x7243b)
>     #3 0xfffd6ec73e6f in g_strsplit (/lib64/libglib-2.0.so.0+0x73e6f)
>     #4 0xaaab66be5077 in main /mnt/sdc/qemu-master/qemu-4.2.0-rc0/vl.c:3517
>     #5 0xfffd6e140b9f in __libc_start_main (/lib64/libc.so.6+0x20b9f)
>     #6 0xaaab66bf0f53  (./build/aarch64-softmmu/qemu-system-aarch64+0x8a0f53)
> 
> Reported-by: Euler Robot <euler.robot@huawei.com>
> Signed-off-by: Pan Nengyuan <pannengyuan@huawei.com>
> ---
>  vl.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/vl.c b/vl.c
> index 86474a55c9..2fa5cb3b9a 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -3476,7 +3476,7 @@ int main(int argc, char **argv, char **envp)
>                              gchar **optname = g_strsplit(typename,
>                                                           ACCEL_CLASS_SUFFIX, 0);
>                              printf("%s\n", optname[0]);
> -                            g_free(optname);
> +                            g_strfreev(optname);
>                          }
>                          g_free(typename);
>                      }
> 

Reviewed-by: Laurent Vivier <laurent@vivier.eu>