Hello,
Devm-allocated data should not be kfreed. The label probe_out_free does
not look necessary.
julia
---------- Forwarded message ----------
Date: Mon, 24 Feb 2020 11:49:07 +0800
From: kbuild test robot <lkp@xxxxxxxxx>
To: kbuild@xxxxxxxxxxxx
Cc: Julia Lawall <julia.lawall@xxxxxxx>
Subject: Re: [PATCH 1/1] i2c: imc: Add support for Intel iMC SMBus host
controller.
CC: kbuild-all@xxxxxxxxxxxx
In-Reply-To: <1582498270-50674-2-git-send-email-schaecsn@xxxxxxx>
References: <1582498270-50674-2-git-send-email-schaecsn@xxxxxxx>
TO: Stefan Schaeckeler <schaecsn@xxxxxxx>
CC: linux-i2c@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Andy Lutomirski <luto@xxxxxxxxxx>
Hi Stefan,
I love your patch! Perhaps something to improve:
[auto build test WARNING on wsa/i2c/for-next]
[also build test WARNING on linux/master linus/master v5.6-rc2 next-20200221]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]
url: https://github.com/0day-ci/linux/commits/Stefan-Schaeckeler/i2c-imc-Add-support-for-Intel-iMC-SMBus-host-controller/20200224-065435
base: https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git i2c/for-next
:::::: branch date: 5 hours ago
:::::: commit date: 5 hours ago
If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@xxxxxxxxx>
Reported-by: Julia Lawall <julia.lawall@xxxxxxx>
>> drivers/i2c/busses/i2c-imc.c:447:1-6: WARNING: invalid free of devm_ allocated data
# https://github.com/0day-ci/linux/commit/d7855ea60367262eb4f8252da00de63a0b546234
git remote add linux-review https://github.com/0day-ci/linux
git remote update linux-review
git checkout d7855ea60367262eb4f8252da00de63a0b546234
vim +447 drivers/i2c/busses/i2c-imc.c
d7855ea6036726 Stefan Schaeckeler 2020-02-23 382
d7855ea6036726 Stefan Schaeckeler 2020-02-23 383 static int imc_probe(struct pci_dev *dev, const struct pci_device_id *id)
d7855ea6036726 Stefan Schaeckeler 2020-02-23 384 {
d7855ea6036726 Stefan Schaeckeler 2020-02-23 385 int i, j, err;
d7855ea6036726 Stefan Schaeckeler 2020-02-23 386 struct imc_priv *priv;
d7855ea6036726 Stefan Schaeckeler 2020-02-23 387 struct pci_dev *sad; /* System Address Decoder */
d7855ea6036726 Stefan Schaeckeler 2020-02-23 388 u32 sadcntl;
d7855ea6036726 Stefan Schaeckeler 2020-02-23 389
d7855ea6036726 Stefan Schaeckeler 2020-02-23 390 /* Sanity check. This device is always at 0x13.0 */
d7855ea6036726 Stefan Schaeckeler 2020-02-23 391 if (dev->devfn != PCI_DEVFN(0x13, 0))
d7855ea6036726 Stefan Schaeckeler 2020-02-23 392 return -ENODEV;
d7855ea6036726 Stefan Schaeckeler 2020-02-23 393
d7855ea6036726 Stefan Schaeckeler 2020-02-23 394 priv = devm_kzalloc(&dev->dev, sizeof(*priv), GFP_KERNEL);
d7855ea6036726 Stefan Schaeckeler 2020-02-23 395 if (!priv)
d7855ea6036726 Stefan Schaeckeler 2020-02-23 396 return -ENOMEM;
d7855ea6036726 Stefan Schaeckeler 2020-02-23 397 priv->pci_dev = dev;
d7855ea6036726 Stefan Schaeckeler 2020-02-23 398 pci_set_drvdata(dev, priv);
d7855ea6036726 Stefan Schaeckeler 2020-02-23 399
d7855ea6036726 Stefan Schaeckeler 2020-02-23 400 /*
d7855ea6036726 Stefan Schaeckeler 2020-02-23 401 * From sad, we learn the local node id of the socket.
d7855ea6036726 Stefan Schaeckeler 2020-02-23 402 *
d7855ea6036726 Stefan Schaeckeler 2020-02-23 403 * The socket will not change at runtime and so we throw away sad.
d7855ea6036726 Stefan Schaeckeler 2020-02-23 404 */
d7855ea6036726 Stefan Schaeckeler 2020-02-23 405 sad = imc_get_related_device(dev->bus, PCI_DEVFN(0x0f, 5),
d7855ea6036726 Stefan Schaeckeler 2020-02-23 406 PCI_DEVICE_ID_INTEL_BROADWELL_IMC_SAD);
d7855ea6036726 Stefan Schaeckeler 2020-02-23 407 if (!sad) {
d7855ea6036726 Stefan Schaeckeler 2020-02-23 408 err = -ENODEV;
d7855ea6036726 Stefan Schaeckeler 2020-02-23 409 goto probe_out_free;
d7855ea6036726 Stefan Schaeckeler 2020-02-23 410 }
d7855ea6036726 Stefan Schaeckeler 2020-02-23 411 pci_read_config_dword(sad, SADCNTL, &sadcntl);
d7855ea6036726 Stefan Schaeckeler 2020-02-23 412 pci_dev_put(sad);
d7855ea6036726 Stefan Schaeckeler 2020-02-23 413
d7855ea6036726 Stefan Schaeckeler 2020-02-23 414 /*
d7855ea6036726 Stefan Schaeckeler 2020-02-23 415 * From pcu, we access the CLTT polling interval.
d7855ea6036726 Stefan Schaeckeler 2020-02-23 416 *
d7855ea6036726 Stefan Schaeckeler 2020-02-23 417 * The polling interval is set by BIOS. We assume it will not change at
d7855ea6036726 Stefan Schaeckeler 2020-02-23 418 * runtime and cache the initial value.
d7855ea6036726 Stefan Schaeckeler 2020-02-23 419 */
d7855ea6036726 Stefan Schaeckeler 2020-02-23 420 priv->pcu.pci_dev = imc_get_related_device(dev->bus, PCI_DEVFN(0x1e, 1),
d7855ea6036726 Stefan Schaeckeler 2020-02-23 421 PCI_DEVICE_ID_INTEL_BROADWELL_IMC_PCU);
d7855ea6036726 Stefan Schaeckeler 2020-02-23 422 if (!priv->pcu.pci_dev) {
d7855ea6036726 Stefan Schaeckeler 2020-02-23 423 err = -ENODEV;
d7855ea6036726 Stefan Schaeckeler 2020-02-23 424 goto probe_out_free;
d7855ea6036726 Stefan Schaeckeler 2020-02-23 425 }
d7855ea6036726 Stefan Schaeckeler 2020-02-23 426 pci_read_config_dword(priv->pcu.pci_dev, TSODCNTL,
d7855ea6036726 Stefan Schaeckeler 2020-02-23 427 &priv->pcu.tsod_polling_interval);
d7855ea6036726 Stefan Schaeckeler 2020-02-23 428
d7855ea6036726 Stefan Schaeckeler 2020-02-23 429 mutex_init(&priv->pcu.mutex);
d7855ea6036726 Stefan Schaeckeler 2020-02-23 430
d7855ea6036726 Stefan Schaeckeler 2020-02-23 431 for (i = 0; i < 2; i++) {
d7855ea6036726 Stefan Schaeckeler 2020-02-23 432 err = imc_init_channelpair(priv, i,
d7855ea6036726 Stefan Schaeckeler 2020-02-23 433 sadcntl & SADCNTL_LOCAL_NODEID_MASK);
d7855ea6036726 Stefan Schaeckeler 2020-02-23 434 if (err)
d7855ea6036726 Stefan Schaeckeler 2020-02-23 435 goto probe_out_free_channelpair;
d7855ea6036726 Stefan Schaeckeler 2020-02-23 436 }
d7855ea6036726 Stefan Schaeckeler 2020-02-23 437
d7855ea6036726 Stefan Schaeckeler 2020-02-23 438 return 0;
d7855ea6036726 Stefan Schaeckeler 2020-02-23 439
d7855ea6036726 Stefan Schaeckeler 2020-02-23 440 probe_out_free_channelpair:
d7855ea6036726 Stefan Schaeckeler 2020-02-23 441 for (j = 0; j < i; j++)
d7855ea6036726 Stefan Schaeckeler 2020-02-23 442 imc_free_channelpair(priv, j);
d7855ea6036726 Stefan Schaeckeler 2020-02-23 443
d7855ea6036726 Stefan Schaeckeler 2020-02-23 444 mutex_destroy(&priv->pcu.mutex);
d7855ea6036726 Stefan Schaeckeler 2020-02-23 445
d7855ea6036726 Stefan Schaeckeler 2020-02-23 446 probe_out_free:
d7855ea6036726 Stefan Schaeckeler 2020-02-23 @447 kfree(priv);
d7855ea6036726 Stefan Schaeckeler 2020-02-23 448 return err;
d7855ea6036726 Stefan Schaeckeler 2020-02-23 449 }
d7855ea6036726 Stefan Schaeckeler 2020-02-23 450
---
0-DAY CI Kernel Test Service, Intel Corporation
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