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net/mlx5: Fix uninitialized variable bug in outlen_write()

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If sscanf() return 0, outlen is uninitialized and used in kzalloc(),
this is unexpected. We should return -EINVAL if the string is invalid.

Fixes: e126ba97db ("mlx5: Add driver for Mellanox Connect-IB adapters")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
YueHaibing 2022-11-21 19:22:04 +08:00 committed by Saeed Mahameed
parent e87c6a832f
commit 3f5769a074
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethernet/mellanox/mlx5/core/cmd.c
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@ -1497,8 +1497,8 @@ static ssize_t outlen_write(struct file *filp, const char __user *buf,
return -EFAULT;
err = sscanf(outlen_str, "%d", &outlen);
if (err < 0)
return err;
if (err != 1)
return -EINVAL;
ptr = kzalloc(outlen, GFP_KERNEL);
if (!ptr)