Re: [PATCH] generic/{349,350,351}: fix scsi_debug parameter quoting issues

[Zorro Lang <zlang@kernel.org>]

On Wed, Sep 23, 2026 at 11:03:15PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <djwong@kernel.org>
> 
> Commit a90ba59dca447d reworked the argument handling code inside
> _get_scsi_debug_dev to put all the remaining arguments (after we extract
> the first four arguments) inside an array that gets passed to modprobe:
> 
> 	opts+=("$@")
> 
> This code takes every command line argument and copies them into the
> array verbatim.  Contrast this to what it did before (excerpted):
> 
> 	opts="...dev_size_mb=$size $@"
> 	echo "scsi_debug options $opts" >> $seqres.full
> 	modprobe scsi_debug $opts
> 
> The old code put all the arguments into a string, then passed the string
> unquoted to modprobe, which means that any spaces in the parameters
> given to _get_scsi_debug_dev become argument separators in the modprobe
> call.  Put more simply, passing "foo=1 bar=1" to _get_scsi_debug_dev
> results in "foo=1" "bar=1" being passed to modprobe.
> 
> Now we no longer do that, which causes these three tests to fail with:
> 
> 	scsi_debug: `1 lbpws10=1' invalid for parameter `lbpws'
> 
> because we're effectively passing lbpws="1 lbpws10=1" to scsi_debug.
> Fix this by removing the quoting from the three tests.
> 
> Cc: <fstests@vger.kernel.org> # v2026.09.22
> Fixes: a90ba59dca447d ("common/scsi_debug: don't slow down I/O")
> Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
> ---

Thanks for finding and fixing it.

Reviewed-by: Zorro Lang <zlang@kernel.org>

>  tests/generic/349 |    2 +-
>  tests/generic/350 |    2 +-
>  tests/generic/351 |    4 ++--
>  3 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/tests/generic/349 b/tests/generic/349
> index 72fbda412ea41c..0d019d4ab46170 100755
> --- a/tests/generic/349
> +++ b/tests/generic/349
> @@ -20,7 +20,7 @@ _require_scsi_debug
>  _require_xfs_io_command "fzero"
>  
>  echo "Create and format"
> -dev=$(_get_scsi_debug_dev 512 512 0 4 "lbpws=1 lbpws10=1")
> +dev=$(_get_scsi_debug_dev 512 512 0 4 lbpws=1 lbpws10=1)
>  _pwrite_byte 0x62 0 4m $dev >> $seqres.full
>  
>  echo "Zero range"
> diff --git a/tests/generic/350 b/tests/generic/350
> index 6079a8d5032303..7dcdda03a613ff 100755
> --- a/tests/generic/350
> +++ b/tests/generic/350
> @@ -20,7 +20,7 @@ _require_scsi_debug
>  _require_xfs_io_command "fpunch"
>  
>  echo "Create and format"
> -dev=$(_get_scsi_debug_dev 512 512 0 4 "lbpws=1 lbpws10=1")
> +dev=$(_get_scsi_debug_dev 512 512 0 4 lbpws=1 lbpws10=1)
>  _pwrite_byte 0x62 0 4m $dev >> $seqres.full
>  
>  echo "Zero punch"
> diff --git a/tests/generic/351 b/tests/generic/351
> index e73b70e4d7957e..374ea1afe46d76 100755
> --- a/tests/generic/351
> +++ b/tests/generic/351
> @@ -27,7 +27,7 @@ _require_xfs_io_command "fzero"
>  _require_xfs_io_command "fpunch"
>  
>  echo "Create and format"
> -dev=$(_get_scsi_debug_dev 4096 4096 0 4 "lbpws=1 lbpws10=1")
> +dev=$(_get_scsi_debug_dev 4096 4096 0 4 lbpws=1 lbpws10=1)
>  _pwrite_byte 0x62 0 4m $dev >> $seqres.full
>  $XFS_IO_PROG -c "fsync" $dev
>  
> @@ -70,7 +70,7 @@ echo "Destroy device"
>  _put_scsi_debug_dev
>  
>  echo "Create w/o unmap or writesame and format"
> -dev=$(_get_scsi_debug_dev 512 512 0 4 "lbpws=0 lbpws10=0 lbpu=0 write_same_length=0 unmap_max_blocks=0")
> +dev=$(_get_scsi_debug_dev 512 512 0 4 lbpws=0 lbpws10=0 lbpu=0 write_same_length=0 unmap_max_blocks=0)
>  _pwrite_byte 0x62 0 4m $dev >> $seqres.full
>  $XFS_IO_PROG -c "fsync" $dev
>