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Sat, 26 Apr 2025 13:46:44 +0000 Message-ID: <12b34414-94cc-4f84-ae63-0ecc38bf5efb@windriver.com> Date: Sat, 26 Apr 2025 21:46:38 +0800 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH V2 1/2] remoteproc: imx_rproc: release carveout under imx_rproc after rproc_attach() fails To: Peng Fan Cc: andersson@kernel.org, mathieu.poirier@linaro.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-remoteproc@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20250426065348.1234391-1-xiaolei.wang@windriver.com> <20250426065348.1234391-2-xiaolei.wang@windriver.com> <20250426131804.GA13806@nxa18884-linux> Content-Language: en-US From: xiaolei wang In-Reply-To: <20250426131804.GA13806@nxa18884-linux> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: TYCP286CA0151.JPNP286.PROD.OUTLOOK.COM (2603:1096:400:383::8) To 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Fan wrote: > CAUTION: This email comes from a non Wind River email account! > Do not click links or open attachments unless you recognize the sender and know the content is safe. > > On Sat, Apr 26, 2025 at 02:53:47PM +0800, Xiaolei Wang wrote: >> When rproc->state = RPROC_DETACHED and rproc_attach() is used >> to attach to the remote processor, if rproc_handle_resources() >> returns a failure, the resources allocated by rproc_prepare_device() >> should be released, otherwise the following memory leak will occur. >> >> Therefore, add imx_rproc_unprepare() to imx_rproc to release the >> memory allocated in imx_rproc_prepare(). >> >> unreferenced object 0xffff0000861c5d00 (size 128): >> comm "kworker/u12:3", pid 59, jiffies 4294893509 (age 149.220s) >> hex dump (first 32 bytes): >> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ >> 00 00 02 88 00 00 00 00 00 00 10 00 00 00 00 00 ............ >> backtrace: >> [<00000000f949fe18>] slab_post_alloc_hook+0x98/0x37c >> [<00000000adbfb3e7>] __kmem_cache_alloc_node+0x138/0x2e0 >> [<00000000521c0345>] kmalloc_trace+0x40/0x158 >> [<000000004e330a49>] rproc_mem_entry_init+0x60/0xf8 >> [<000000002815755e>] imx_rproc_prepare+0xe0/0x180 >> [<0000000003f61b4e>] rproc_boot+0x2ec/0x528 >> [<00000000e7e994ac>] rproc_add+0x124/0x17c >> [<0000000048594076>] imx_rproc_probe+0x4ec/0x5d4 >> [<00000000efc298a1>] platform_probe+0x68/0xd8 >> [<00000000110be6fe>] really_probe+0x110/0x27c >> [<00000000e245c0ae>] __driver_probe_device+0x78/0x12c >> [<00000000f61f6f5e>] driver_probe_device+0x3c/0x118 >> [<00000000a7874938>] __device_attach_driver+0xb8/0xf8 >> [<0000000065319e69>] bus_for_each_drv+0x84/0xe4 >> [<00000000db3eb243>] __device_attach+0xfc/0x18c >> [<0000000072e4e1a4>] device_initial_probe+0x14/0x20 >> > Fix Tag? I will add it > >> Signed-off-by: Xiaolei Wang >> --- >> drivers/remoteproc/imx_rproc.c | 14 ++++++++++++++ >> 1 file changed, 14 insertions(+) >> >> diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c >> index 74299af1d7f1..c489bd15ee91 100644 >> --- a/drivers/remoteproc/imx_rproc.c >> +++ b/drivers/remoteproc/imx_rproc.c >> @@ -595,6 +595,19 @@ static int imx_rproc_prepare(struct rproc *rproc) >> return 0; >> } >> >> +static int imx_rproc_unprepare(struct rproc *rproc) >> +{ >> + struct rproc_mem_entry *entry, *tmp; >> + >> + rproc_coredump_cleanup(rproc); >> + /* clean up carveout allocations */ >> + list_for_each_entry_safe(entry, tmp, &rproc->carveouts, node) { >> + list_del(&entry->node); >> + kfree(entry); >> + } >> + return 0; > Could "rproc_resource_cleanup(rproc);" be used here? Thanks for your suggestion, I will try it thanks xiaolei > > Regards, > Peng