Re: [PATCH 062/190] Revert "scsi: libfc: remove unnecessary assertion on ep variable"

[Greg Kroah-Hartman]

On Wed, Apr 21, 2021 at 02:58:57PM +0200, Greg Kroah-Hartman wrote:
> This reverts commit 52b894393cecdc303990e834778d39b85d0553fc.
> 
> Commits from @umn.edu addresses have been found to be submitted in "bad
> faith" to try to test the kernel community's ability to review "known
> malicious" changes.  The result of these submissions can be found in a
> paper published at the 42nd IEEE Symposium on Security and Privacy
> entitled, "Open Source Insecurity: Stealthily Introducing
> Vulnerabilities via Hypocrite Commits" written by Qiushi Wu (University
> of Minnesota) and Kangjie Lu (University of Minnesota).
> 
> Because of this, all submissions from this group must be reverted from
> the kernel tree and will need to be re-reviewed again to determine if
> they actually are a valid fix.  Until that work is complete, remove this
> change to ensure that no problems are being introduced into the
> codebase.
> 
> Cc: https
> Cc: Hannes Reinecke <hare@xxxxxxx>
> Cc: Aditya Pakki <pakki001@xxxxxxx>
> Cc: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> ---
>  drivers/target/tcm_fc/tfc_io.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/target/tcm_fc/tfc_io.c b/drivers/target/tcm_fc/tfc_io.c
> index bbe2e29612fa..15d557a11f63 100644
> --- a/drivers/target/tcm_fc/tfc_io.c
> +++ b/drivers/target/tcm_fc/tfc_io.c
> @@ -220,6 +220,7 @@ void ft_recv_write_data(struct ft_cmd *cmd, struct fc_frame *fp)
>  	ep = fc_seq_exch(seq);
>  	lport = ep->lp;
>  	if (cmd->was_ddp_setup) {
> +		BUG_ON(!ep);
>  		BUG_ON(!lport);
>  		/*
>  		 * Since DDP (Large Rx offload) was setup for this request,
> -- 
> 2.31.1
> 

The original was obviously correct, so I'll drop this revert.

thanks,

greg k-h