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* drivers/misc/habanalabs/common/command_buffer.c:472:24: warning: Assigned value is garbage or undefined [clang-analyzer-core.uninitialized.Assign]
       [not found] <202201242342.1CK6hoP8-lkp@intel.com>
@ 2022-01-27  3:03 ` kernel test robot
  0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2022-01-27  3:03 UTC (permalink / raw)
  To: farah kassabri; +Cc: llvm, kbuild-all, Linux Kernel Mailing List, Oded Gabbay

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   dd81e1c7d5fb126e5fbc5c9e334d7b3ec29a16a0
commit: b9d31cada7d9f137028c11534fff77fec8511690 habanalabs: change wait_for_interrupt implementation
date:   4 weeks ago
config: riscv-randconfig-c006-20220124 (https://download.01.org/0day-ci/archive/20220124/202201242342.1CK6hoP8-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 9006bf424847bf91f0a624ffc27ad165c7b804c4)
reproduce (this is a W=1 build):
         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
         chmod +x ~/bin/make.cross
         # install riscv cross compiling tool for clang build
         # apt-get install binutils-riscv64-linux-gnu
         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b9d31cada7d9f137028c11534fff77fec8511690
         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
         git fetch --no-tags linus master
         git checkout b9d31cada7d9f137028c11534fff77fec8511690
         # save the config file to linux build tree
         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv clang-analyzer

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


clang-analyzer warnings: (new ones prefixed by >>)

 >> drivers/misc/habanalabs/common/command_buffer.c:472:24: warning: Assigned value is garbage or undefined [clang-analyzer-core.uninitialized.Assign]
                            args->out.device_va = device_va;
                                                ^ ~~~~~~~~~
    drivers/misc/habanalabs/common/command_buffer.c:429:18: note: 'device_va' declared without an initial value
            u64 handle = 0, device_va;
                            ^~~~~~~~~
    drivers/misc/habanalabs/common/command_buffer.c:464:8: note: Calling 'hl_cb_info'
                    rc = hl_cb_info(hdev, &hpriv->cb_mgr, args->in.cb_handle,
                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    drivers/misc/habanalabs/common/command_buffer.c:399:6: note: Assuming 'cb' is null
            if (!cb) {
                ^~~
    drivers/misc/habanalabs/common/command_buffer.c:399:2: note: Taking true branch
            if (!cb) {
            ^
    drivers/misc/habanalabs/common/command_buffer.c:400:3: note: Loop condition is false.  Exiting loop
                    dev_err(hdev->dev,
                    ^
    drivers/misc/habanalabs/common/command_buffer.c:403:3: note: Control jumps to line 420
                    goto out;
                    ^
    drivers/misc/habanalabs/common/command_buffer.c:421:2: note: Returning without writing to '*device_va'
            return rc;
            ^
    drivers/misc/habanalabs/common/command_buffer.c:464:8: note: Returning from 'hl_cb_info'
                    rc = hl_cb_info(hdev, &hpriv->cb_mgr, args->in.cb_handle,
                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    drivers/misc/habanalabs/common/command_buffer.c:471:7: note: Assuming the condition is true
                    if (args->in.flags & HL_CB_FLAGS_GET_DEVICE_VA)
                        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    drivers/misc/habanalabs/common/command_buffer.c:471:3: note: Taking true branch
                    if (args->in.flags & HL_CB_FLAGS_GET_DEVICE_VA)
                    ^
    drivers/misc/habanalabs/common/command_buffer.c:472:24: note: Assigned value is garbage or undefined
                            args->out.device_va = device_va;
                                                ^ ~~~~~~~~~

vim +472 drivers/misc/habanalabs/common/command_buffer.c

f44afb5b5a5d04 drivers/misc/habanalabs/common/command_buffer.c Tomer Tayar    2020-09-02  423
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  424  int hl_cb_ioctl(struct hl_fpriv *hpriv, void *data)
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  425  {
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  426  	union hl_cb_args *args = data;
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  427  	struct hl_device *hdev = hpriv->hdev;
66a76401c50b26 drivers/misc/habanalabs/common/command_buffer.c Ofir Bitton    2020-10-05  428  	enum hl_device_status status;
b9d31cada7d9f1 drivers/misc/habanalabs/common/command_buffer.c farah kassabri 2021-11-02  429  	u64 handle = 0, device_va;
f44afb5b5a5d04 drivers/misc/habanalabs/common/command_buffer.c Tomer Tayar    2020-09-02  430  	u32 usage_cnt = 0;
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  431  	int rc;
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  432
66a76401c50b26 drivers/misc/habanalabs/common/command_buffer.c Ofir Bitton    2020-10-05  433  	if (!hl_device_operational(hdev, &status)) {
3f5398cfbf051d drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-04-06  434  		dev_warn_ratelimited(hdev->dev,
3f5398cfbf051d drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-04-06  435  			"Device is %s. Can't execute CB IOCTL\n",
66a76401c50b26 drivers/misc/habanalabs/common/command_buffer.c Ofir Bitton    2020-10-05  436  			hdev->status[status]);
3f5398cfbf051d drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-04-06  437  		return -EBUSY;
3f5398cfbf051d drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-04-06  438  	}
3f5398cfbf051d drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-04-06  439
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  440  	switch (args->in.op) {
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  441  	case HL_CB_OP_CREATE:
39b425170d35ff drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2020-04-17  442  		if (args->in.cb_size > HL_MAX_CB_SIZE) {
39b425170d35ff drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2020-04-17  443  			dev_err(hdev->dev,
39b425170d35ff drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2020-04-17  444  				"User requested CB size %d must be less than %d\n",
39b425170d35ff drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2020-04-17  445  				args->in.cb_size, HL_MAX_CB_SIZE);
39b425170d35ff drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2020-04-17  446  			rc = -EINVAL;
39b425170d35ff drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2020-04-17  447  		} else {
fa8641a14f2841 drivers/misc/habanalabs/common/command_buffer.c Tomer Tayar    2020-09-07  448  			rc = hl_cb_create(hdev, &hpriv->cb_mgr, hpriv->ctx,
ef6a0f6caa4a5d drivers/misc/habanalabs/common/command_buffer.c Tomer Tayar    2020-07-09  449  					args->in.cb_size, false,
ef6a0f6caa4a5d drivers/misc/habanalabs/common/command_buffer.c Tomer Tayar    2020-07-09  450  					!!(args->in.flags & HL_CB_FLAGS_MAP),
ef6a0f6caa4a5d drivers/misc/habanalabs/common/command_buffer.c Tomer Tayar    2020-07-09  451  					&handle);
39b425170d35ff drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2020-04-17  452  		}
39b425170d35ff drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2020-04-17  453
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  454  		memset(args, 0, sizeof(*args));
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  455  		args->out.cb_handle = handle;
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  456  		break;
39b425170d35ff drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2020-04-17  457
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  458  	case HL_CB_OP_DESTROY:
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  459  		rc = hl_cb_destroy(hdev, &hpriv->cb_mgr,
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  460  					args->in.cb_handle);
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  461  		break;
39b425170d35ff drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2020-04-17  462
f44afb5b5a5d04 drivers/misc/habanalabs/common/command_buffer.c Tomer Tayar    2020-09-02  463  	case HL_CB_OP_INFO:
f44afb5b5a5d04 drivers/misc/habanalabs/common/command_buffer.c Tomer Tayar    2020-09-02  464  		rc = hl_cb_info(hdev, &hpriv->cb_mgr, args->in.cb_handle,
b9d31cada7d9f1 drivers/misc/habanalabs/common/command_buffer.c farah kassabri 2021-11-02  465  				args->in.flags,
b9d31cada7d9f1 drivers/misc/habanalabs/common/command_buffer.c farah kassabri 2021-11-02  466  				&usage_cnt,
b9d31cada7d9f1 drivers/misc/habanalabs/common/command_buffer.c farah kassabri 2021-11-02  467  				&device_va);
b9d31cada7d9f1 drivers/misc/habanalabs/common/command_buffer.c farah kassabri 2021-11-02  468
b9d31cada7d9f1 drivers/misc/habanalabs/common/command_buffer.c farah kassabri 2021-11-02  469  		memset(&args->out, 0, sizeof(args->out));
b9d31cada7d9f1 drivers/misc/habanalabs/common/command_buffer.c farah kassabri 2021-11-02  470
b9d31cada7d9f1 drivers/misc/habanalabs/common/command_buffer.c farah kassabri 2021-11-02  471  		if (args->in.flags & HL_CB_FLAGS_GET_DEVICE_VA)
b9d31cada7d9f1 drivers/misc/habanalabs/common/command_buffer.c farah kassabri 2021-11-02 @472  			args->out.device_va = device_va;
b9d31cada7d9f1 drivers/misc/habanalabs/common/command_buffer.c farah kassabri 2021-11-02  473  		else
f44afb5b5a5d04 drivers/misc/habanalabs/common/command_buffer.c Tomer Tayar    2020-09-02  474  			args->out.usage_cnt = usage_cnt;
f44afb5b5a5d04 drivers/misc/habanalabs/common/command_buffer.c Tomer Tayar    2020-09-02  475  		break;
f44afb5b5a5d04 drivers/misc/habanalabs/common/command_buffer.c Tomer Tayar    2020-09-02  476
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  477  	default:
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  478  		rc = -ENOTTY;
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  479  		break;
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  480  	}
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  481
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  482  	return rc;
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  483  }
be5d926b5c1043 drivers/misc/habanalabs/command_buffer.c        Oded Gabbay    2019-02-16  484

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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2022-01-27  3:03 ` drivers/misc/habanalabs/common/command_buffer.c:472:24: warning: Assigned value is garbage or undefined [clang-analyzer-core.uninitialized.Assign] kernel test robot

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