From: Dan Carpenter <dan.carpenter@oracle.com>
To: kys@microsoft.com
Cc: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org,
devel@linuxdriverproject.org, olaf@aepfle.de, apw@canonical.com,
jasowang@redhat.com, sthemmin@microsoft.com,
Michael.H.Kelley@microsoft.com, vkuznets@redhat.com,
Haiyang Zhang <haiyangz@microsoft.com>
Subject: Re: [PATCH V2 5/5] Tools: hv: kvp: Fix a warning of buffer overflow with gcc 8.0.1
Date: Thu, 18 Oct 2018 09:32:31 +0300 [thread overview]
Message-ID: <20181018063230.v6hp5e3agk62c3s3@mwanda> (raw)
In-Reply-To: <20181018050932.27932-5-kys@linuxonhyperv.com>
On Thu, Oct 18, 2018 at 05:09:32AM +0000, kys@linuxonhyperv.com wrote:
> From: Dexuan Cui <decui@microsoft.com>
>
> The patch fixes:
>
> hv_kvp_daemon.c: In function 'kvp_set_ip_info':
> hv_kvp_daemon.c:1305:2: note: 'snprintf' output between 41 and 4136 bytes
> into a destination of size 4096
>
> The "(unsigned int)str_len" is to avoid:
>
> hv_kvp_daemon.c:1309:30: warning: comparison of integer expressions of
> different signedness: 'int' and 'long unsigned int' [-Wsign-compare]
>
Ugh... Any tool with the most basic flow analysis would realize this
was a false positive. We use at least three static analyzers which
catch signedness bugs. Can we turn off GCC's warning on this until they
improve it a bit?
regards,
dan carpenter
next prev parent reply other threads:[~2018-10-18 6:33 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-18 5:08 [PATCH V2 0/5] Drivers: hv: Miscellaneous fixes kys
2018-10-18 5:09 ` [PATCH V2 1/5] Drivers: hv: vmbus: Get rid of unnecessary state in hv_context kys
2018-10-18 5:09 ` [PATCH V2 2/5] hv_utils: update name in struct hv_driver util_drv kys
2018-10-18 5:09 ` [PATCH V2 3/5] Drivers: hv: kvp: Fix the recent regression caused by incorrect clean-up kys
2018-10-24 15:37 ` Michael Kelley
2018-10-31 23:23 ` Dexuan Cui
2018-11-01 18:56 ` gregkh
2018-11-01 19:22 ` Dexuan Cui
2018-11-02 4:54 ` gregkh
2018-11-11 4:18 ` Dexuan Cui
2018-11-11 17:09 ` gregkh
2018-11-02 21:55 ` KY Srinivasan
2018-11-01 19:38 ` Haiyang Zhang
2018-10-18 5:09 ` [PATCH V2 4/5] Drivers: hv: kvp: Use %u to print U32 kys
2018-10-18 5:09 ` [PATCH V2 5/5] Tools: hv: kvp: Fix a warning of buffer overflow with gcc 8.0.1 kys
2018-10-18 6:32 ` Dan Carpenter [this message]
2018-10-18 15:08 ` David Laight
2018-10-24 15:04 ` [PATCH V2 1/5] Drivers: hv: vmbus: Get rid of unnecessary state in hv_context Michael Kelley
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