* sound/core/oss/pcm_oss.c:2377:3: warning: Assigned value is garbage or undefined [clang-analyzer-core.uninitialized.Assign]
@ 2021-12-17 8:51 kernel test robot
0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2021-12-17 8:51 UTC (permalink / raw)
To: kbuild
[-- Attachment #1: Type: text/plain, Size: 31411 bytes --]
CC: llvm(a)lists.linux.dev
CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Mark Rutland <mark.rutland@arm.com>
CC: Peter Zijlstra <peterz@infradead.org>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 6441998e2e37131b0a4c310af9156d79d3351c16
commit: fc63a6e08a8c97a3dc3a6f2e1946b949b9a6c2d3 locking/atomic: arm: move to ARCH_ATOMIC
date: 7 months ago
:::::: branch date: 9 hours ago
:::::: commit date: 7 months ago
config: arm-randconfig-c002-20211215 (https://download.01.org/0day-ci/archive/20211217/202112171657.WM2Eyr6v-lkp(a)intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dd245bab9fbb364faa1581e4f92ba3119a872fba)
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 arm cross compiling tool for clang build
# apt-get install binutils-arm-linux-gnueabi
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fc63a6e08a8c97a3dc3a6f2e1946b949b9a6c2d3
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout fc63a6e08a8c97a3dc3a6f2e1946b949b9a6c2d3
# save the config file to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm 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 >>)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
sound/core/oss/pcm_oss.c:733:6: note: 'min_period_size' is 0
if (min_period_size) {
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
(cond) ? \
^~~~
sound/core/oss/pcm_oss.c:733:2: note: '?' condition is false
if (min_period_size) {
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value'
(cond) ? \
^
sound/core/oss/pcm_oss.c:733:2: note: Taking false branch
if (min_period_size) {
^
include/linux/compiler.h:56:23: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
sound/core/oss/pcm_oss.c:742:2: note: Assuming 'max_period_size' is not equal to 0
if (max_period_size) {
^
include/linux/compiler.h:56:45: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
sound/core/oss/pcm_oss.c:742:2: note: '?' condition is false
if (max_period_size) {
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
sound/core/oss/pcm_oss.c:742:6: note: 'max_period_size' is not equal to 0
if (max_period_size) {
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
(cond) ? \
^~~~
sound/core/oss/pcm_oss.c:742:2: note: '?' condition is true
if (max_period_size) {
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value'
(cond) ? \
^
sound/core/oss/pcm_oss.c:742:2: note: Taking true branch
if (max_period_size) {
^
include/linux/compiler.h:56:23: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
sound/core/oss/pcm_oss.c:744:21: note: '?' condition is false
max_period_size = rounddown_pow_of_two(max_period_size);
^
include/linux/log2.h:193:2: note: expanded from macro 'rounddown_pow_of_two'
__builtin_constant_p(n) ? ( \
^
sound/core/oss/pcm_oss.c:744:21: note: Calling '__rounddown_pow_of_two'
max_period_size = rounddown_pow_of_two(max_period_size);
^
include/linux/log2.h:195:2: note: expanded from macro 'rounddown_pow_of_two'
__rounddown_pow_of_two(n) \
^~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/log2.h:67:13: note: The result of the left shift is undefined due to shifting by '4294967295', which is greater or equal to the width of type 'unsigned long'
return 1UL << (fls_long(n) - 1);
^ ~~~~~~~~~~~~~~~~~
>> sound/core/oss/pcm_oss.c:2377:3: warning: Assigned value is garbage or undefined [clang-analyzer-core.uninitialized.Assign]
struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
^
sound/core/oss/pcm_oss.c:2396:2: note: Assuming 'rpcm_oss_file' is null
if (rpcm_oss_file)
^
include/linux/compiler.h:56:45: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
sound/core/oss/pcm_oss.c:2396:2: note: '?' condition is false
if (rpcm_oss_file)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
sound/core/oss/pcm_oss.c:2396:6: note: 'rpcm_oss_file' is null
if (rpcm_oss_file)
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
(cond) ? \
^~~~
sound/core/oss/pcm_oss.c:2396:2: note: '?' condition is false
if (rpcm_oss_file)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value'
(cond) ? \
^
sound/core/oss/pcm_oss.c:2396:2: note: Taking false branch
if (rpcm_oss_file)
^
include/linux/compiler.h:56:23: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
sound/core/oss/pcm_oss.c:2399:17: note: Calling 'kzalloc'
pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/slab.h:686:9: note: Storing uninitialized value
return kmalloc(size, flags | __GFP_ZERO);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sound/core/oss/pcm_oss.c:2399:17: note: Returning from 'kzalloc'
pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sound/core/oss/pcm_oss.c:2400:6: note: Assuming 'pcm_oss_file' is not equal to null
if (pcm_oss_file == NULL)
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
sound/core/oss/pcm_oss.c:2400:2: note: '?' condition is false
if (pcm_oss_file == NULL)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
sound/core/oss/pcm_oss.c:2400:6: note: 'pcm_oss_file' is not equal to null
if (pcm_oss_file == NULL)
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
(cond) ? \
^~~~
sound/core/oss/pcm_oss.c:2400:2: note: '?' condition is false
if (pcm_oss_file == NULL)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value'
(cond) ? \
--
^~~~
sound/core/oss/pcm_oss.c:2421:3: note: '?' condition is false
if (err < 0) {
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
sound/core/oss/pcm_oss.c:2421:7: note: 'err' is < 0
if (err < 0) {
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
(cond) ? \
^~~~
sound/core/oss/pcm_oss.c:2421:3: note: '?' condition is true
if (err < 0) {
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value'
(cond) ? \
^
sound/core/oss/pcm_oss.c:2421:3: note: Taking true branch
if (err < 0) {
^
include/linux/compiler.h:56:23: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
sound/core/oss/pcm_oss.c:2422:4: note: Calling 'snd_pcm_oss_release_file'
snd_pcm_oss_release_file(pcm_oss_file);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sound/core/oss/pcm_oss.c:2374:7: note: 'pcm_oss_file' is non-null
if (!pcm_oss_file)
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
sound/core/oss/pcm_oss.c:2374:2: note: '?' condition is false
if (!pcm_oss_file)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
sound/core/oss/pcm_oss.c:2374:7: note: 'pcm_oss_file' is non-null
if (!pcm_oss_file)
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
(cond) ? \
^~~~
sound/core/oss/pcm_oss.c:2374:2: note: '?' condition is false
if (!pcm_oss_file)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value'
(cond) ? \
^
sound/core/oss/pcm_oss.c:2374:2: note: Taking false branch
if (!pcm_oss_file)
^
include/linux/compiler.h:56:23: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
sound/core/oss/pcm_oss.c:2376:7: note: The value 0 is assigned to 'cidx'
for (cidx = 0; cidx < 2; ++cidx) {
^~~~~~~~
sound/core/oss/pcm_oss.c:2376:2: note: Loop condition is true. Entering loop body
for (cidx = 0; cidx < 2; ++cidx) {
^
sound/core/oss/pcm_oss.c:2377:3: note: Assigned value is garbage or undefined
struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> sound/core/oss/pcm_oss.c:2430:6: warning: Branch condition evaluates to a garbage value [clang-analyzer-core.uninitialized.Branch]
if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
sound/core/oss/pcm_oss.c:2396:2: note: Assuming 'rpcm_oss_file' is null
if (rpcm_oss_file)
^
include/linux/compiler.h:56:45: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
sound/core/oss/pcm_oss.c:2396:2: note: '?' condition is false
if (rpcm_oss_file)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
sound/core/oss/pcm_oss.c:2396:6: note: 'rpcm_oss_file' is null
if (rpcm_oss_file)
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
(cond) ? \
^~~~
sound/core/oss/pcm_oss.c:2396:2: note: '?' condition is false
if (rpcm_oss_file)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value'
(cond) ? \
^
sound/core/oss/pcm_oss.c:2396:2: note: Taking false branch
if (rpcm_oss_file)
^
include/linux/compiler.h:56:23: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
sound/core/oss/pcm_oss.c:2399:17: note: Calling 'kzalloc'
pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/slab.h:686:9: note: Storing uninitialized value
return kmalloc(size, flags | __GFP_ZERO);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sound/core/oss/pcm_oss.c:2399:17: note: Returning from 'kzalloc'
pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sound/core/oss/pcm_oss.c:2400:6: note: Assuming 'pcm_oss_file' is not equal to null
if (pcm_oss_file == NULL)
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
sound/core/oss/pcm_oss.c:2400:2: note: '?' condition is false
if (pcm_oss_file == NULL)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
sound/core/oss/pcm_oss.c:2400:6: note: 'pcm_oss_file' is not equal to null
if (pcm_oss_file == NULL)
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
(cond) ? \
^~~~
sound/core/oss/pcm_oss.c:2400:2: note: '?' condition is false
if (pcm_oss_file == NULL)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
vim +2377 sound/core/oss/pcm_oss.c
^1da177e4c3f41 Linus Torvalds 2005-04-16 2370
6ac77bc180fbd9 Takashi Iwai 2005-11-17 2371 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
^1da177e4c3f41 Linus Torvalds 2005-04-16 2372 {
^1da177e4c3f41 Linus Torvalds 2005-04-16 2373 int cidx;
7eaa943c8ed8e9 Takashi Iwai 2008-08-08 2374 if (!pcm_oss_file)
7eaa943c8ed8e9 Takashi Iwai 2008-08-08 2375 return 0;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2376 for (cidx = 0; cidx < 2; ++cidx) {
6ac77bc180fbd9 Takashi Iwai 2005-11-17 @2377 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
3bf75f9b90c981 Takashi Iwai 2006-03-27 2378 if (substream)
^1da177e4c3f41 Linus Torvalds 2005-04-16 2379 snd_pcm_release_substream(substream);
^1da177e4c3f41 Linus Torvalds 2005-04-16 2380 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 2381 kfree(pcm_oss_file);
^1da177e4c3f41 Linus Torvalds 2005-04-16 2382 return 0;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2383 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 2384
^1da177e4c3f41 Linus Torvalds 2005-04-16 2385 static int snd_pcm_oss_open_file(struct file *file,
6ac77bc180fbd9 Takashi Iwai 2005-11-17 2386 struct snd_pcm *pcm,
6ac77bc180fbd9 Takashi Iwai 2005-11-17 2387 struct snd_pcm_oss_file **rpcm_oss_file,
^1da177e4c3f41 Linus Torvalds 2005-04-16 2388 int minor,
060d77b9c04acd Takashi Iwai 2006-03-27 2389 struct snd_pcm_oss_setup *setup)
^1da177e4c3f41 Linus Torvalds 2005-04-16 2390 {
3bf75f9b90c981 Takashi Iwai 2006-03-27 2391 int idx, err;
6ac77bc180fbd9 Takashi Iwai 2005-11-17 2392 struct snd_pcm_oss_file *pcm_oss_file;
3bf75f9b90c981 Takashi Iwai 2006-03-27 2393 struct snd_pcm_substream *substream;
aeb5d727062a02 Al Viro 2008-09-02 2394 fmode_t f_mode = file->f_mode;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2395
7eaa943c8ed8e9 Takashi Iwai 2008-08-08 2396 if (rpcm_oss_file)
^1da177e4c3f41 Linus Torvalds 2005-04-16 2397 *rpcm_oss_file = NULL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2398
ca2c0966562cfb Takashi Iwai 2005-09-09 2399 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
^1da177e4c3f41 Linus Torvalds 2005-04-16 2400 if (pcm_oss_file == NULL)
^1da177e4c3f41 Linus Torvalds 2005-04-16 2401 return -ENOMEM;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2402
^1da177e4c3f41 Linus Torvalds 2005-04-16 2403 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
^1da177e4c3f41 Linus Torvalds 2005-04-16 2404 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
^1da177e4c3f41 Linus Torvalds 2005-04-16 2405 f_mode = FMODE_WRITE;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2406
0df63e44c3e315 Takashi Iwai 2006-04-28 2407 file->f_flags &= ~O_APPEND;
3bf75f9b90c981 Takashi Iwai 2006-03-27 2408 for (idx = 0; idx < 2; idx++) {
060d77b9c04acd Takashi Iwai 2006-03-27 2409 if (setup[idx].disable)
3bf75f9b90c981 Takashi Iwai 2006-03-27 2410 continue;
6cb53e7ed77d42 Takashi Iwai 2006-08-02 2411 if (! pcm->streams[idx].substream_count)
6cb53e7ed77d42 Takashi Iwai 2006-08-02 2412 continue; /* no matching substream */
3bf75f9b90c981 Takashi Iwai 2006-03-27 2413 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
3bf75f9b90c981 Takashi Iwai 2006-03-27 2414 if (! (f_mode & FMODE_WRITE))
3bf75f9b90c981 Takashi Iwai 2006-03-27 2415 continue;
3bf75f9b90c981 Takashi Iwai 2006-03-27 2416 } else {
3bf75f9b90c981 Takashi Iwai 2006-03-27 2417 if (! (f_mode & FMODE_READ))
3bf75f9b90c981 Takashi Iwai 2006-03-27 2418 continue;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2419 }
3bf75f9b90c981 Takashi Iwai 2006-03-27 2420 err = snd_pcm_open_substream(pcm, idx, file, &substream);
^1da177e4c3f41 Linus Torvalds 2005-04-16 2421 if (err < 0) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 2422 snd_pcm_oss_release_file(pcm_oss_file);
^1da177e4c3f41 Linus Torvalds 2005-04-16 2423 return err;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2424 }
3bf75f9b90c981 Takashi Iwai 2006-03-27 2425
3bf75f9b90c981 Takashi Iwai 2006-03-27 2426 pcm_oss_file->streams[idx] = substream;
060d77b9c04acd Takashi Iwai 2006-03-27 2427 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
^1da177e4c3f41 Linus Torvalds 2005-04-16 2428 }
3bf75f9b90c981 Takashi Iwai 2006-03-27 2429
bbdc1b7dbe4157 OGAWA Hirofumi 2006-04-06 @2430 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 2431 snd_pcm_oss_release_file(pcm_oss_file);
3bf75f9b90c981 Takashi Iwai 2006-03-27 2432 return -EINVAL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2433 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 2434
^1da177e4c3f41 Linus Torvalds 2005-04-16 2435 file->private_data = pcm_oss_file;
7eaa943c8ed8e9 Takashi Iwai 2008-08-08 2436 if (rpcm_oss_file)
^1da177e4c3f41 Linus Torvalds 2005-04-16 2437 *rpcm_oss_file = pcm_oss_file;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2438 return 0;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2439 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 2440
:::::: The code at line 2377 was first introduced by commit
:::::: 6ac77bc180fbd985988015020c2e2347e802959d [ALSA] Remove xxx_t typedefs: PCM OSS-emulation
:::::: TO: Takashi Iwai <tiwai@suse.de>
:::::: CC: Jaroslav Kysela <perex@suse.cz>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
^ permalink raw reply [flat|nested] 2+ messages in thread
* sound/core/oss/pcm_oss.c:2377:3: warning: Assigned value is garbage or undefined [clang-analyzer-core.uninitialized.Assign]
@ 2021-12-16 23:08 kernel test robot
0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2021-12-16 23:08 UTC (permalink / raw)
To: kbuild
[-- Attachment #1: Type: text/plain, Size: 31411 bytes --]
CC: llvm(a)lists.linux.dev
CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Mark Rutland <mark.rutland@arm.com>
CC: Peter Zijlstra <peterz@infradead.org>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: fa36bbe6d43f3bbce1f10a187e153587c7584d83
commit: fc63a6e08a8c97a3dc3a6f2e1946b949b9a6c2d3 locking/atomic: arm: move to ARCH_ATOMIC
date: 7 months ago
:::::: branch date: 4 hours ago
:::::: commit date: 7 months ago
config: arm-randconfig-c002-20211215 (https://download.01.org/0day-ci/archive/20211217/202112170722.QJcRozeU-lkp(a)intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dd245bab9fbb364faa1581e4f92ba3119a872fba)
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 arm cross compiling tool for clang build
# apt-get install binutils-arm-linux-gnueabi
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fc63a6e08a8c97a3dc3a6f2e1946b949b9a6c2d3
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout fc63a6e08a8c97a3dc3a6f2e1946b949b9a6c2d3
# save the config file to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm 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 >>)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
sound/core/oss/pcm_oss.c:733:6: note: 'min_period_size' is 0
if (min_period_size) {
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
(cond) ? \
^~~~
sound/core/oss/pcm_oss.c:733:2: note: '?' condition is false
if (min_period_size) {
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value'
(cond) ? \
^
sound/core/oss/pcm_oss.c:733:2: note: Taking false branch
if (min_period_size) {
^
include/linux/compiler.h:56:23: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
sound/core/oss/pcm_oss.c:742:2: note: Assuming 'max_period_size' is not equal to 0
if (max_period_size) {
^
include/linux/compiler.h:56:45: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
sound/core/oss/pcm_oss.c:742:2: note: '?' condition is false
if (max_period_size) {
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
sound/core/oss/pcm_oss.c:742:6: note: 'max_period_size' is not equal to 0
if (max_period_size) {
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
(cond) ? \
^~~~
sound/core/oss/pcm_oss.c:742:2: note: '?' condition is true
if (max_period_size) {
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value'
(cond) ? \
^
sound/core/oss/pcm_oss.c:742:2: note: Taking true branch
if (max_period_size) {
^
include/linux/compiler.h:56:23: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
sound/core/oss/pcm_oss.c:744:21: note: '?' condition is false
max_period_size = rounddown_pow_of_two(max_period_size);
^
include/linux/log2.h:193:2: note: expanded from macro 'rounddown_pow_of_two'
__builtin_constant_p(n) ? ( \
^
sound/core/oss/pcm_oss.c:744:21: note: Calling '__rounddown_pow_of_two'
max_period_size = rounddown_pow_of_two(max_period_size);
^
include/linux/log2.h:195:2: note: expanded from macro 'rounddown_pow_of_two'
__rounddown_pow_of_two(n) \
^~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/log2.h:67:13: note: The result of the left shift is undefined due to shifting by '4294967295', which is greater or equal to the width of type 'unsigned long'
return 1UL << (fls_long(n) - 1);
^ ~~~~~~~~~~~~~~~~~
>> sound/core/oss/pcm_oss.c:2377:3: warning: Assigned value is garbage or undefined [clang-analyzer-core.uninitialized.Assign]
struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
^
sound/core/oss/pcm_oss.c:2396:2: note: Assuming 'rpcm_oss_file' is null
if (rpcm_oss_file)
^
include/linux/compiler.h:56:45: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
sound/core/oss/pcm_oss.c:2396:2: note: '?' condition is false
if (rpcm_oss_file)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
sound/core/oss/pcm_oss.c:2396:6: note: 'rpcm_oss_file' is null
if (rpcm_oss_file)
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
(cond) ? \
^~~~
sound/core/oss/pcm_oss.c:2396:2: note: '?' condition is false
if (rpcm_oss_file)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value'
(cond) ? \
^
sound/core/oss/pcm_oss.c:2396:2: note: Taking false branch
if (rpcm_oss_file)
^
include/linux/compiler.h:56:23: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
sound/core/oss/pcm_oss.c:2399:17: note: Calling 'kzalloc'
pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/slab.h:686:9: note: Storing uninitialized value
return kmalloc(size, flags | __GFP_ZERO);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sound/core/oss/pcm_oss.c:2399:17: note: Returning from 'kzalloc'
pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sound/core/oss/pcm_oss.c:2400:6: note: Assuming 'pcm_oss_file' is not equal to null
if (pcm_oss_file == NULL)
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
sound/core/oss/pcm_oss.c:2400:2: note: '?' condition is false
if (pcm_oss_file == NULL)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
sound/core/oss/pcm_oss.c:2400:6: note: 'pcm_oss_file' is not equal to null
if (pcm_oss_file == NULL)
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
(cond) ? \
^~~~
sound/core/oss/pcm_oss.c:2400:2: note: '?' condition is false
if (pcm_oss_file == NULL)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value'
(cond) ? \
--
^~~~
sound/core/oss/pcm_oss.c:2421:3: note: '?' condition is false
if (err < 0) {
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
sound/core/oss/pcm_oss.c:2421:7: note: 'err' is < 0
if (err < 0) {
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
(cond) ? \
^~~~
sound/core/oss/pcm_oss.c:2421:3: note: '?' condition is true
if (err < 0) {
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value'
(cond) ? \
^
sound/core/oss/pcm_oss.c:2421:3: note: Taking true branch
if (err < 0) {
^
include/linux/compiler.h:56:23: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
sound/core/oss/pcm_oss.c:2422:4: note: Calling 'snd_pcm_oss_release_file'
snd_pcm_oss_release_file(pcm_oss_file);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sound/core/oss/pcm_oss.c:2374:7: note: 'pcm_oss_file' is non-null
if (!pcm_oss_file)
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
sound/core/oss/pcm_oss.c:2374:2: note: '?' condition is false
if (!pcm_oss_file)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
sound/core/oss/pcm_oss.c:2374:7: note: 'pcm_oss_file' is non-null
if (!pcm_oss_file)
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
(cond) ? \
^~~~
sound/core/oss/pcm_oss.c:2374:2: note: '?' condition is false
if (!pcm_oss_file)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value'
(cond) ? \
^
sound/core/oss/pcm_oss.c:2374:2: note: Taking false branch
if (!pcm_oss_file)
^
include/linux/compiler.h:56:23: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
sound/core/oss/pcm_oss.c:2376:7: note: The value 0 is assigned to 'cidx'
for (cidx = 0; cidx < 2; ++cidx) {
^~~~~~~~
sound/core/oss/pcm_oss.c:2376:2: note: Loop condition is true. Entering loop body
for (cidx = 0; cidx < 2; ++cidx) {
^
sound/core/oss/pcm_oss.c:2377:3: note: Assigned value is garbage or undefined
struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> sound/core/oss/pcm_oss.c:2430:6: warning: Branch condition evaluates to a garbage value [clang-analyzer-core.uninitialized.Branch]
if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
sound/core/oss/pcm_oss.c:2396:2: note: Assuming 'rpcm_oss_file' is null
if (rpcm_oss_file)
^
include/linux/compiler.h:56:45: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
sound/core/oss/pcm_oss.c:2396:2: note: '?' condition is false
if (rpcm_oss_file)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
sound/core/oss/pcm_oss.c:2396:6: note: 'rpcm_oss_file' is null
if (rpcm_oss_file)
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
(cond) ? \
^~~~
sound/core/oss/pcm_oss.c:2396:2: note: '?' condition is false
if (rpcm_oss_file)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value'
(cond) ? \
^
sound/core/oss/pcm_oss.c:2396:2: note: Taking false branch
if (rpcm_oss_file)
^
include/linux/compiler.h:56:23: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
sound/core/oss/pcm_oss.c:2399:17: note: Calling 'kzalloc'
pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/slab.h:686:9: note: Storing uninitialized value
return kmalloc(size, flags | __GFP_ZERO);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sound/core/oss/pcm_oss.c:2399:17: note: Returning from 'kzalloc'
pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sound/core/oss/pcm_oss.c:2400:6: note: Assuming 'pcm_oss_file' is not equal to null
if (pcm_oss_file == NULL)
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
sound/core/oss/pcm_oss.c:2400:2: note: '?' condition is false
if (pcm_oss_file == NULL)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
sound/core/oss/pcm_oss.c:2400:6: note: 'pcm_oss_file' is not equal to null
if (pcm_oss_file == NULL)
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
(cond) ? \
^~~~
sound/core/oss/pcm_oss.c:2400:2: note: '?' condition is false
if (pcm_oss_file == NULL)
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
vim +2377 sound/core/oss/pcm_oss.c
^1da177e4c3f41 Linus Torvalds 2005-04-16 2370
6ac77bc180fbd9 Takashi Iwai 2005-11-17 2371 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
^1da177e4c3f41 Linus Torvalds 2005-04-16 2372 {
^1da177e4c3f41 Linus Torvalds 2005-04-16 2373 int cidx;
7eaa943c8ed8e9 Takashi Iwai 2008-08-08 2374 if (!pcm_oss_file)
7eaa943c8ed8e9 Takashi Iwai 2008-08-08 2375 return 0;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2376 for (cidx = 0; cidx < 2; ++cidx) {
6ac77bc180fbd9 Takashi Iwai 2005-11-17 @2377 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
3bf75f9b90c981 Takashi Iwai 2006-03-27 2378 if (substream)
^1da177e4c3f41 Linus Torvalds 2005-04-16 2379 snd_pcm_release_substream(substream);
^1da177e4c3f41 Linus Torvalds 2005-04-16 2380 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 2381 kfree(pcm_oss_file);
^1da177e4c3f41 Linus Torvalds 2005-04-16 2382 return 0;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2383 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 2384
^1da177e4c3f41 Linus Torvalds 2005-04-16 2385 static int snd_pcm_oss_open_file(struct file *file,
6ac77bc180fbd9 Takashi Iwai 2005-11-17 2386 struct snd_pcm *pcm,
6ac77bc180fbd9 Takashi Iwai 2005-11-17 2387 struct snd_pcm_oss_file **rpcm_oss_file,
^1da177e4c3f41 Linus Torvalds 2005-04-16 2388 int minor,
060d77b9c04acd Takashi Iwai 2006-03-27 2389 struct snd_pcm_oss_setup *setup)
^1da177e4c3f41 Linus Torvalds 2005-04-16 2390 {
3bf75f9b90c981 Takashi Iwai 2006-03-27 2391 int idx, err;
6ac77bc180fbd9 Takashi Iwai 2005-11-17 2392 struct snd_pcm_oss_file *pcm_oss_file;
3bf75f9b90c981 Takashi Iwai 2006-03-27 2393 struct snd_pcm_substream *substream;
aeb5d727062a02 Al Viro 2008-09-02 2394 fmode_t f_mode = file->f_mode;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2395
7eaa943c8ed8e9 Takashi Iwai 2008-08-08 2396 if (rpcm_oss_file)
^1da177e4c3f41 Linus Torvalds 2005-04-16 2397 *rpcm_oss_file = NULL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2398
ca2c0966562cfb Takashi Iwai 2005-09-09 2399 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
^1da177e4c3f41 Linus Torvalds 2005-04-16 2400 if (pcm_oss_file == NULL)
^1da177e4c3f41 Linus Torvalds 2005-04-16 2401 return -ENOMEM;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2402
^1da177e4c3f41 Linus Torvalds 2005-04-16 2403 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
^1da177e4c3f41 Linus Torvalds 2005-04-16 2404 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
^1da177e4c3f41 Linus Torvalds 2005-04-16 2405 f_mode = FMODE_WRITE;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2406
0df63e44c3e315 Takashi Iwai 2006-04-28 2407 file->f_flags &= ~O_APPEND;
3bf75f9b90c981 Takashi Iwai 2006-03-27 2408 for (idx = 0; idx < 2; idx++) {
060d77b9c04acd Takashi Iwai 2006-03-27 2409 if (setup[idx].disable)
3bf75f9b90c981 Takashi Iwai 2006-03-27 2410 continue;
6cb53e7ed77d42 Takashi Iwai 2006-08-02 2411 if (! pcm->streams[idx].substream_count)
6cb53e7ed77d42 Takashi Iwai 2006-08-02 2412 continue; /* no matching substream */
3bf75f9b90c981 Takashi Iwai 2006-03-27 2413 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
3bf75f9b90c981 Takashi Iwai 2006-03-27 2414 if (! (f_mode & FMODE_WRITE))
3bf75f9b90c981 Takashi Iwai 2006-03-27 2415 continue;
3bf75f9b90c981 Takashi Iwai 2006-03-27 2416 } else {
3bf75f9b90c981 Takashi Iwai 2006-03-27 2417 if (! (f_mode & FMODE_READ))
3bf75f9b90c981 Takashi Iwai 2006-03-27 2418 continue;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2419 }
3bf75f9b90c981 Takashi Iwai 2006-03-27 2420 err = snd_pcm_open_substream(pcm, idx, file, &substream);
^1da177e4c3f41 Linus Torvalds 2005-04-16 2421 if (err < 0) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 2422 snd_pcm_oss_release_file(pcm_oss_file);
^1da177e4c3f41 Linus Torvalds 2005-04-16 2423 return err;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2424 }
3bf75f9b90c981 Takashi Iwai 2006-03-27 2425
3bf75f9b90c981 Takashi Iwai 2006-03-27 2426 pcm_oss_file->streams[idx] = substream;
060d77b9c04acd Takashi Iwai 2006-03-27 2427 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
^1da177e4c3f41 Linus Torvalds 2005-04-16 2428 }
3bf75f9b90c981 Takashi Iwai 2006-03-27 2429
bbdc1b7dbe4157 OGAWA Hirofumi 2006-04-06 @2430 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 2431 snd_pcm_oss_release_file(pcm_oss_file);
3bf75f9b90c981 Takashi Iwai 2006-03-27 2432 return -EINVAL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2433 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 2434
^1da177e4c3f41 Linus Torvalds 2005-04-16 2435 file->private_data = pcm_oss_file;
7eaa943c8ed8e9 Takashi Iwai 2008-08-08 2436 if (rpcm_oss_file)
^1da177e4c3f41 Linus Torvalds 2005-04-16 2437 *rpcm_oss_file = pcm_oss_file;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2438 return 0;
^1da177e4c3f41 Linus Torvalds 2005-04-16 2439 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 2440
:::::: The code at line 2377 was first introduced by commit
:::::: 6ac77bc180fbd985988015020c2e2347e802959d [ALSA] Remove xxx_t typedefs: PCM OSS-emulation
:::::: TO: Takashi Iwai <tiwai@suse.de>
:::::: CC: Jaroslav Kysela <perex@suse.cz>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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