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Re: [Qemu-block] [Qemu-devel] [PATCH] pr-manager: Fix invalid g_free() c


From: Philippe Mathieu-Daudé
Subject: Re: [Qemu-block] [Qemu-devel] [PATCH] pr-manager: Fix invalid g_free() crash bug
Date: Thu, 22 Aug 2019 16:54:01 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0

On 8/22/19 3:38 PM, Markus Armbruster wrote:
> pr_manager_worker() passes its @opaque argument to g_free().  Wrong;
> it points to pr_manager_worker()'s automatic @data.  Broken when
> commit 2f3a7ab39be converted @data from heap- to stack-allocated.  Fix
> by deleting the g_free().
> 
> Fixes: 2f3a7ab39bec4ba8022dc4d42ea641165b004e3e
> Cc: address@hidden
> Signed-off-by: Markus Armbruster <address@hidden>
> ---
>  scsi/pr-manager.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/scsi/pr-manager.c b/scsi/pr-manager.c
> index ee43663576..0c866e8698 100644
> --- a/scsi/pr-manager.c
> +++ b/scsi/pr-manager.c
> @@ -39,7 +39,6 @@ static int pr_manager_worker(void *opaque)
>      int fd = data->fd;
>      int r;
>  
> -    g_free(data);
>      trace_pr_manager_run(fd, hdr->cmdp[0], hdr->cmdp[1]);
>  
>      /* The reference was taken in pr_manager_execute.  */
> 

Reviewed-by: Philippe Mathieu-Daudé <address@hidden>



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