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Linux aarch64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 MIME-Version: 1.0 In-Reply-To: <20190611093744.GA9783@ubuntu> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190611_025420_003000_7B3EC9E9 X-CRM114-Status: GOOD ( 17.27 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Gen, No idea why I'm being cc'd on this but hey... ;-) On 11/06/2019 10:37, Gen Zhang wrote: > On Thu, May 30, 2019 at 11:39:49AM +0800, Gen Zhang wrote: >> In knav_pool_create(), 'pool->name' is allocated by kstrndup(). It >> returns NULL when fails. So 'pool->name' should be checked. And free >> 'pool' when error. >> >> Signed-off-by: Gen Zhang >> --- >> diff --git a/drivers/soc/ti/knav_qmss_queue.c b/drivers/soc/ti/knav_qmss_queue.c >> index 8b41837..0f8cb28 100644 >> --- a/drivers/soc/ti/knav_qmss_queue.c >> +++ b/drivers/soc/ti/knav_qmss_queue.c >> @@ -814,6 +814,12 @@ void *knav_pool_create(const char *name, >> } >> >> pool->name = kstrndup(name, KNAV_NAME_SIZE - 1, GFP_KERNEL); >> + if (!pool->name) { >> + dev_err(kdev->dev, "failed to duplicate for pool(%s)\n", >> + name); There is no need to output anything, the kernel will be loud enough if you run out of memory. >> + ret = -ENOMEM; >> + goto err_name; >> + } >> pool->kdev = kdev; >> pool->dev = kdev->dev; >> >> @@ -864,6 +870,7 @@ void *knav_pool_create(const char *name, >> mutex_unlock(&knav_dev_lock); >> err: >> kfree(pool->name); >> +err_name: kfree(NULL) is perfectly valid, there is no need to create a second label. Just branch to the existing error label. >> devm_kfree(kdev->dev, pool); >> return ERR_PTR(ret); >> } > Can anyone look into this patch? > > Thanks > Gen > The real question is whether this is actually an error at all. pool->name doesn't seem to be used for anything but debug information, and the printing code can perfectly accommodate a NULL pointer. Thanks, M. -- Jazz is not dead. It just smells funny... _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel