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Date: Wed, 25 Aug 2021 16:48:51 +0800
From: kernel test robot <lkp@...el.com>
To: "Rafael J. Wysocki" <rjw@...ysocki.net>,
Linux ACPI <linux-acpi@...r.kernel.org>
Cc: clang-built-linux@...glegroups.com, kbuild-all@...ts.01.org,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ACPI: power: Use acpi_handle_debug() to pring debug
messages
Hi "Rafael,
I love your patch! Perhaps something to improve:
[auto build test WARNING on pm/linux-next]
[also build test WARNING on linus/master v5.14-rc7 next-20210824]
[cannot apply to linux/master]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Rafael-J-Wysocki/ACPI-power-Use-acpi_handle_debug-to-pring-debug-messages/20210824-231858
base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: x86_64-randconfig-c007-20210824 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d26000e4cc2bc65e207a84fa26cb6e374d60aa12)
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
# https://github.com/0day-ci/linux/commit/055f14fe49e9668695c38bec833ba2ba599df466
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Rafael-J-Wysocki/ACPI-power-Use-acpi_handle_debug-to-pring-debug-messages/20210824-231858
git checkout 055f14fe49e9668695c38bec833ba2ba599df466
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 clang-analyzer
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
clang-analyzer warnings: (new ones prefixed by >>)
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
arch/x86/kernel/cpu/mtrr/generic.c:427:2: warning: Value stored to 'high_width' is never read [clang-analyzer-deadcode.DeadStores]
high_width = (__ffs64(size_or_mask) - (32 - PAGE_SHIFT) + 3) / 4;
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/x86/kernel/cpu/mtrr/generic.c:427:2: note: Value stored to 'high_width' is never read
high_width = (__ffs64(size_or_mask) - (32 - PAGE_SHIFT) + 3) / 4;
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
arch/x86/kernel/cpu/mtrr/cleanup.c:950:4: warning: Value stored to 'highest_pfn' is never read [clang-analyzer-deadcode.DeadStores]
highest_pfn = range[nr_range].end;
^ ~~~~~~~~~~~~~~~~~~~
arch/x86/kernel/cpu/mtrr/cleanup.c:950:4: note: Value stored to 'highest_pfn' is never read
highest_pfn = range[nr_range].end;
^ ~~~~~~~~~~~~~~~~~~~
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
>> drivers/acpi/power.c:436:14: warning: Value stored to 'handle' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
acpi_handle handle = resource->device.handle;
^~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~
drivers/acpi/power.c:436:14: note: Value stored to 'handle' during its initialization is never read
acpi_handle handle = resource->device.handle;
^~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~
drivers/acpi/power.c:956:2: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
strcpy(acpi_device_name(device), ACPI_POWER_DEVICE_NAME);
^~~~~~
drivers/acpi/power.c:956:2: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
strcpy(acpi_device_name(device), ACPI_POWER_DEVICE_NAME);
^~~~~~
drivers/acpi/power.c:957:2: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
strcpy(acpi_device_class(device), ACPI_POWER_CLASS);
^~~~~~
drivers/acpi/power.c:957:2: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
strcpy(acpi_device_class(device), ACPI_POWER_CLASS);
^~~~~~
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
drivers/acpi/bus.c:1257:2: warning: Value stored to 'status' is never read [clang-analyzer-deadcode.DeadStores]
status = acpi_install_table_handler(acpi_bus_table_handler, NULL);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/acpi/bus.c:1257:2: note: Value stored to 'status' is never read
status = acpi_install_table_handler(acpi_bus_table_handler, NULL);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
drivers/acpi/glue.c:161:3: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
strcpy(buf, PHYSICAL_NODE_STRING);
^~~~~~
drivers/acpi/glue.c:161:3: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
strcpy(buf, PHYSICAL_NODE_STRING);
^~~~~~
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
10 warnings generated.
drivers/acpi/scan.c:1102:3: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
strcpy(device->pnp.bus_id, "ACPI");
^~~~~~
drivers/acpi/scan.c:1102:3: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
strcpy(device->pnp.bus_id, "ACPI");
^~~~~~
drivers/acpi/scan.c:1108:3: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
strcpy(device->pnp.bus_id, "PWRF");
^~~~~~
drivers/acpi/scan.c:1108:3: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
strcpy(device->pnp.bus_id, "PWRF");
^~~~~~
drivers/acpi/scan.c:1111:3: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
strcpy(device->pnp.bus_id, "SLPF");
^~~~~~
drivers/acpi/scan.c:1111:3: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
strcpy(device->pnp.bus_id, "SLPF");
^~~~~~
drivers/acpi/scan.c:1114:3: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
strcpy(device->pnp.bus_id, "ECDT");
^~~~~~
drivers/acpi/scan.c:1114:3: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
strcpy(device->pnp.bus_id, "ECDT");
^~~~~~
drivers/acpi/scan.c:1125:3: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
strcpy(device->pnp.bus_id, bus_id);
^~~~~~
drivers/acpi/scan.c:1125:3: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
strcpy(device->pnp.bus_id, bus_id);
^~~~~~
drivers/acpi/scan.c:1373:4: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME);
^~~~~~
drivers/acpi/scan.c:1373:4: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME);
^~~~~~
drivers/acpi/scan.c:1374:4: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
strcpy(pnp->device_class, ACPI_BUS_CLASS);
^~~~~~
drivers/acpi/scan.c:1374:4: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
strcpy(pnp->device_class, ACPI_BUS_CLASS);
^~~~~~
drivers/acpi/scan.c:2143:29: warning: Dereference of null pointer [clang-analyzer-core.NullDereference]
bool skip = !first_pass && device->flags.visited;
^
drivers/acpi/scan.c:2614:2: note: Calling 'acpi_bus_scan'
acpi_bus_scan(ACPI_ROOT_OBJECT);
vim +/handle +436 drivers/acpi/power.c
433
434 static int acpi_power_off_unlocked(struct acpi_power_resource *resource)
435 {
> 436 acpi_handle handle = resource->device.handle;
437 int result = 0;
438
439 if (!resource->ref_count) {
440 acpi_handle_debug(handle, "Power resource already off\n");
441 return 0;
442 }
443
444 if (--resource->ref_count) {
445 acpi_handle_debug(handle, "Power resource still in use\n");
446 } else {
447 result = __acpi_power_off(resource);
448 if (result)
449 resource->ref_count++;
450 }
451 return result;
452 }
453
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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