From: Boris Burkov <boris@bur.io>
To: Khaled ROMDHANI <khaledromdhani216@gmail.com>
Cc: clm@fb.com, josef@toxicpanda.com, dsterba@suse.com,
linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org,
kernel-janitors@vger.kernel.org
Subject: Re: [PATCH-next] fs/btrfs: Fix uninitialized variable
Date: Tue, 13 Apr 2021 10:25:01 -0700 [thread overview]
Message-ID: <YHXT4kIrs28daRER@zen> (raw)
In-Reply-To: <20210413130604.11487-1-khaledromdhani216@gmail.com>
On Tue, Apr 13, 2021 at 02:06:04PM +0100, Khaled ROMDHANI wrote:
> The variable zone is not initialized. It
> may causes a failed assertion.
>
> Addresses-Coverity: ("Uninitialized variables")
>
> Signed-off-by: Khaled ROMDHANI <khaledromdhani216@gmail.com>
Reviewed-by: Boris Burkov <boris@bur.io>
> ---
> fs/btrfs/zoned.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c
> index eeb3ebe11d7a..ee15ab8dccb5 100644
> --- a/fs/btrfs/zoned.c
> +++ b/fs/btrfs/zoned.c
> @@ -136,7 +136,7 @@ static int sb_write_pointer(struct block_device *bdev, struct blk_zone *zones,
> */
> static inline u32 sb_zone_number(int shift, int mirror)
> {
> - u64 zone;
> + u64 zone = 0;
>
> ASSERT(mirror < BTRFS_SUPER_MIRROR_MAX);
Thanks for the fix.
I assume this was dug up by coverity static analysis rather than hitting
it in a live system?
Since there is already an assert for the pre-condition 'mirror < max',
I feel like it would make sense to also add one for mirror > 0.
> switch (mirror) {
> --
> 2.17.1
>
next prev parent reply other threads:[~2021-04-13 17:25 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-13 13:06 [PATCH-next] fs/btrfs: Fix uninitialized variable Khaled ROMDHANI
2021-04-13 17:25 ` Boris Burkov [this message]
2021-04-16 17:32 ` David Sterba
2021-04-17 11:50 ` Khaled Romdhani
2021-04-23 12:42 Khaled ROMDHANI
2021-04-26 20:19 ` David Sterba
2021-04-27 12:18 ` Khaled Romdhani
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