linux-kernel - Re: [PATCH] udf: remove reporting loc in debug output

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Date:   Wed, 1 Feb 2023 15:14:33 -0800
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Tom Rix <trix@...hat.com>
Cc:     jack@...e.com, nathan@...nel.org, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev
Subject: Re: [PATCH] udf: remove reporting loc in debug output

On Fri, Jan 27, 2023 at 08:29:06AM -0800, Tom Rix wrote:
> clang build fails with
> fs/udf/partition.c:86:28: error: variable 'loc' is uninitialized when used here [-Werror,-Wuninitialized]
>                           sb, block, partition, loc, index);
>                                                 ^~~
> 
> loc is now only know when bh is valid.  So remove reporting loc in debug output.

typo: s/know/known/

> 
> Fixes: 4215db46d538 ("udf: Use udf_bread() in udf_get_pblock_virt15()")
> Signed-off-by: Tom Rix <trix@...hat.com>

Thanks Tom, kernelci has also been reporting this.
https://lore.kernel.org/linux-next/?q=error%3A+variable+%27loc%27+is+uninitialized+when+used+here

Reported-by: "kernelci.org bot" <bot@...nelci.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>

> ---
>  fs/udf/partition.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/udf/partition.c b/fs/udf/partition.c
> index 92765d2f6958..5bcfe78d5cab 100644
> --- a/fs/udf/partition.c
> +++ b/fs/udf/partition.c
> @@ -82,8 +82,8 @@ uint32_t udf_get_pblock_virt15(struct super_block *sb, uint32_t block,
>  
>  	bh = udf_bread(sbi->s_vat_inode, newblock, 0, &err);
>  	if (!bh) {
> -		udf_debug("get_pblock(UDF_VIRTUAL_MAP:%p,%u,%u) VAT: %u[%u]\n",
> -			  sb, block, partition, loc, index);
> +		udf_debug("get_pblock(UDF_VIRTUAL_MAP:%p,%u,%u)\n",
> +			  sb, block, partition);
>  		return 0xFFFFFFFF;
>  	}
>  
> -- 
> 2.26.3
> 
>