Re: [PATCH] ublk: prevent invalid access with DEBUG

[Jens Axboe]

On Wed, 26 Nov 2025 12:48:35 +0000, Kevin Brodsky wrote:
> ublk_ch_uring_cmd_local() may jump to the out label before
> initialising the io pointer. This will cause trouble if DEBUG is
> defined, because the pr_devel() call dereferences io. Clang reports:
> 
> drivers/block/ublk_drv.c:2403:6: error: variable 'io' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized]
>  2403 |         if (tag >= ub->dev_info.queue_depth)
>       |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/block/ublk_drv.c:2492:32: note: uninitialized use occurs here
>  2492 |                         __func__, cmd_op, tag, ret, io->flags);
>       |
> 
> [...]

Applied, thanks!

[1/1] ublk: prevent invalid access with DEBUG
      (no commit info)

Best regards,
-- 
Jens Axboe