[ammarfaizi2-block:google/android/kernel/common/android12-5.10 2362/9999] mm/page_pinner.c:304:22: warning: variable 'page_pinner' set but not used

From: kernel test robot
Date: Tue Mar 08 2022 - 22:25:59 EST

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tree: https://github.com/ammarfaizi2/linux-block google/android/kernel/common/android12-5.10
head: fcaaaaae6d4c72eb4084dc136acd478ad09fe0f0
commit: ddc4a48797352076586ef3ab79c6bfaba08fd06e [2362/9999] ANDROID: mm: page_pinner: introduce failure_tracking feature
config: x86_64-randconfig-c007-20220307 (https://download.01.org/0day-ci/archive/20220309/202203091120.mN0fCHUE-lkp@xxxxxxxxx/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d271fc04d5b97b12e6b797c6067d3c96a8d7470e)
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/ammarfaizi2/linux-block/commit/ddc4a48797352076586ef3ab79c6bfaba08fd06e
git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
git fetch --no-tags ammarfaizi2-block google/android/kernel/common/android12-5.10
git checkout ddc4a48797352076586ef3ab79c6bfaba08fd06e
# save the config file 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@xxxxxxxxx>

All warnings (new ones prefixed by >>):

>> mm/page_pinner.c:304:22: warning: variable 'page_pinner' set but not used [-Wunused-but-set-variable]
struct page_pinner *page_pinner;
^
1 warning generated.

Kconfig warnings: (for reference only)
WARNING: unmet direct dependencies detected for DRM_MIPI_DSI
Depends on HAS_IOMEM && DRM
Selected by
- GKI_HIDDEN_DRM_CONFIGS
WARNING: unmet direct dependencies detected for DRM_KMS_CMA_HELPER
Depends on HAS_IOMEM && DRM
Selected by
- GKI_HIDDEN_DRM_CONFIGS
WARNING: unmet direct dependencies detected for DRM_GEM_CMA_HELPER
Depends on HAS_IOMEM && DRM
Selected by
- GKI_HIDDEN_DRM_CONFIGS

clang-analyzer warnings: (new ones prefixed by >>)
^~~~~~
drivers/scsi/myrb.c:478:56: note: Left side of '&&' is false
if (status == MYRB_NO_STDBY_RBLD_OR_CHECK_IN_PROGRESS &&
^
drivers/scsi/myrb.c:481:6: note: 'status' is not equal to MYRB_NO_STDBY_RBLD_OR_CHECK_IN_PROGRESS
if (status != MYRB_NO_STDBY_RBLD_OR_CHECK_IN_PROGRESS) {
^~~~~~
drivers/scsi/myrb.c:481:2: note: Taking true branch
if (status != MYRB_NO_STDBY_RBLD_OR_CHECK_IN_PROGRESS) {
^
drivers/scsi/myrb.c:483:23: note: The left operand of '-' is a garbage value
rbld_buf.ldev_size - rbld_buf.blocks_left;
~~~~~~~~~~~~~~~~~~ ^
drivers/scsi/myrb.c:1937:24: warning: The left operand of '!=' is a garbage value [clang-analyzer-core.UndefinedBinaryOperatorResult]
if (rbld_buf.ldev_num != sdev->id ||
^
drivers/scsi/myrb.c:2160:9: note: Calling 'rebuild_show'
return rebuild_show(dev, attr, buf);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/scsi/myrb.c:1927:29: note: Left side of '&&' is false
struct scsi_device *sdev = to_scsi_device(dev);
^
include/scsi/scsi_device.h:244:2: note: expanded from macro 'to_scsi_device'
container_of(d, struct scsi_device, sdev_gendev)
^
include/linux/kernel.h:853:61: note: expanded from macro 'container_of'
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
^
drivers/scsi/myrb.c:1927:29: note: Taking false branch
struct scsi_device *sdev = to_scsi_device(dev);
^
include/scsi/scsi_device.h:244:2: note: expanded from macro 'to_scsi_device'
container_of(d, struct scsi_device, sdev_gendev)
^
include/linux/kernel.h:853:2: note: expanded from macro 'container_of'
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
^
include/linux/build_bug.h:39:37: note: expanded from macro 'BUILD_BUG_ON_MSG'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^
include/linux/compiler_types.h:323:2: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^
include/linux/compiler_types.h:311:2: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
^
include/linux/compiler_types.h:303:3: note: expanded from macro '__compiletime_assert'
if (!(condition)) \
^
drivers/scsi/myrb.c:1927:29: note: Loop condition is false. Exiting loop
struct scsi_device *sdev = to_scsi_device(dev);
^
include/scsi/scsi_device.h:244:2: note: expanded from macro 'to_scsi_device'
container_of(d, struct scsi_device, sdev_gendev)
^
include/linux/kernel.h:853:2: note: expanded from macro 'container_of'
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
^
include/linux/build_bug.h:39:37: note: expanded from macro 'BUILD_BUG_ON_MSG'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^
include/linux/compiler_types.h:323:2: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^
include/linux/compiler_types.h:311:2: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
^
include/linux/compiler_types.h:301:2: note: expanded from macro '__compiletime_assert'
do { \
^
drivers/scsi/myrb.c:1932:6: note: Assuming the condition is false
if (sdev->channel < myrb_logical_channel(sdev->host))
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/scsi/myrb.c:1932:2: note: Taking false branch
if (sdev->channel < myrb_logical_channel(sdev->host))
^
drivers/scsi/myrb.c:1935:11: note: Calling 'myrb_get_rbld_progress'
status = myrb_get_rbld_progress(cb, &rbld_buf);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/scsi/myrb.c:451:6: note: Assuming 'rbld_buf' is null
if (!rbld_buf)
^~~~~~~~~
drivers/scsi/myrb.c:451:2: note: Taking true branch
if (!rbld_buf)
^
drivers/scsi/myrb.c:452:3: note: Returning without writing to 'rbld->ldev_num'
return MYRB_STATUS_RBLD_NOT_CHECKED;
^
drivers/scsi/myrb.c:1935:11: note: Returning from 'myrb_get_rbld_progress'
status = myrb_get_rbld_progress(cb, &rbld_buf);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/scsi/myrb.c:1937:24: note: The left operand of '!=' is a garbage value
if (rbld_buf.ldev_num != sdev->id ||
~~~~~~~~~~~~~~~~~ ^
Suppressed 18 warnings (6 in non-user code, 12 with check filters).
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.
Suppressed 5 warnings (5 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.
7 warnings generated.
>> mm/page_pinner.c:312:2: warning: Value stored to 'page_pinner' is never read [clang-analyzer-deadcode.DeadStores]
page_pinner = get_page_pinner(page_ext);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~
mm/page_pinner.c:312:2: note: Value stored to 'page_pinner' is never read
page_pinner = get_page_pinner(page_ext);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~
Suppressed 6 warnings (5 in non-user code, 1 with check filters).
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.
Suppressed 5 warnings (5 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.
Suppressed 5 warnings (5 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.
Suppressed 5 warnings (5 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.
6 warnings generated.
Suppressed 6 warnings (6 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.
6 warnings generated.
Suppressed 6 warnings (6 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.
Suppressed 5 warnings (5 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.
Suppressed 5 warnings (5 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.
4 warnings generated.
Suppressed 4 warnings (4 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.
Suppressed 5 warnings (5 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.
4 warnings generated.
Suppressed 4 warnings (4 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.
Suppressed 5 warnings (5 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.
4 warnings generated.
Suppressed 4 warnings (4 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.
Suppressed 5 warnings (5 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.
12 warnings generated.
drivers/scsi/smartpqi/smartpqi_init.c:1650:4: warning: Value stored to 'count' is never read [clang-analyzer-deadcode.DeadStores]
count += scnprintf(buffer + count,
^ ~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/scsi/smartpqi/smartpqi_init.c:1650:4: note: Value stored to 'count' is never read
count += scnprintf(buffer + count,
^ ~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/scsi/smartpqi/smartpqi_init.c:1662:4: warning: Value stored to 'count' is never read [clang-analyzer-deadcode.DeadStores]
count += scnprintf(buffer + count,
^ ~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/scsi/smartpqi/smartpqi_init.c:1662:4: note: Value stored to 'count' is never read
count += scnprintf(buffer + count,
^ ~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/scsi/smartpqi/smartpqi_init.c:2117:19: warning: Access to field 'wwid' results in a dereference of a null pointer (loaded from variable 'phys_lun_ext_entry') [clang-analyzer-core.NullDereference]
device->wwid = phys_lun_ext_entry->wwid;
^~~~~~~~~~~~~~~~~~
drivers/scsi/smartpqi/smartpqi_init.c:1976:7: note: Calling 'pqi_get_device_lists'
rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/scsi/smartpqi/smartpqi_init.c:1001:6: note: 'rc' is 0
if (rc)
^~
drivers/scsi/smartpqi/smartpqi_init.c:1001:2: note: Taking false branch
if (rc)
^
drivers/scsi/smartpqi/smartpqi_init.c:1006:6: note: 'rc' is 0
if (rc)
^~
drivers/scsi/smartpqi/smartpqi_init.c:1006:2: note: Taking false branch
if (rc)
^
drivers/scsi/smartpqi/smartpqi_init.c:1016:6: note: 'logdev_data' is non-null
if (logdev_data) {
^~~~~~~~~~~
drivers/scsi/smartpqi/smartpqi_init.c:1016:2: note: Taking true branch
if (logdev_data) {
^
drivers/scsi/smartpqi/smartpqi_init.c:1031:6: note: Assuming 'internal_logdev_list' is non-null
if (!internal_logdev_list) {
^~~~~~~~~~~~~~~~~~~~~
drivers/scsi/smartpqi/smartpqi_init.c:1031:2: note: Taking false branch
if (!internal_logdev_list) {
^
drivers/scsi/smartpqi/smartpqi_init.c:1047:2: note: Returning zero, which participates in a condition later
return 0;
^~~~~~~~
drivers/scsi/smartpqi/smartpqi_init.c:1976:7: note: Returning from 'pqi_get_device_lists'
rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/scsi/smartpqi/smartpqi_init.c:1977:6: note: 'rc' is 0
if (rc)
^~
drivers/scsi/smartpqi/smartpqi_init.c:1977:2: note: Taking false branch
if (rc)
--
__X64_SYS_STUBx(x, name, __VA_ARGS__) \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:96:2: note: expanded from macro '__X64_SYS_STUBx'
__SYS_STUBx(x64, sys##name, \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:79:10: note: expanded from macro '__SYS_STUBx'
return __se_##name(__VA_ARGS__); \
^~~~~~~~~~~~~~~~~~~~~~~~
note: expanded from here
fs/pipe.c:1013:1: note: Calling '__do_sys_pipe'
SYSCALL_DEFINE1(pipe, int __user *, fildes)
^
include/linux/syscalls.h:213:36: note: expanded from macro 'SYSCALL_DEFINE1'
#define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/syscalls.h:224:2: note: expanded from macro 'SYSCALL_DEFINEx'
__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:234:14: note: expanded from macro '__SYSCALL_DEFINEx'
long ret = __do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__));\
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
note: expanded from here
fs/pipe.c:1015:9: note: Calling 'do_pipe2'
return do_pipe2(fildes, 0);
^~~~~~~~~~~~~~~~~~~
fs/pipe.c:992:10: note: Calling '__do_pipe_flags'
error = __do_pipe_flags(fd, files, flags);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/pipe.c:941:2: note: Taking false branch
if (flags & ~(O_CLOEXEC | O_NONBLOCK | O_DIRECT | O_NOTIFICATION_PIPE))
^
fs/pipe.c:944:10: note: Calling 'create_pipe_files'
error = create_pipe_files(files, flags);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/pipe.c:899:7: note: 'inode' is non-null
if (!inode)
^~~~~
fs/pipe.c:899:2: note: Taking false branch
if (!inode)
^
fs/pipe.c:902:2: note: Taking false branch
if (flags & O_NOTIFICATION_PIPE) {
^
fs/pipe.c:914:2: note: Taking false branch
if (IS_ERR(f)) {
^
fs/pipe.c:924:2: note: Taking true branch
if (IS_ERR(res[0])) {
^
fs/pipe.c:944:10: note: Returning from 'create_pipe_files'
error = create_pipe_files(files, flags);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/pipe.c:945:6: note: Assuming 'error' is 0
if (error)
^~~~~
fs/pipe.c:945:2: note: Taking false branch
if (error)
^
fs/pipe.c:949:6: note: Assuming 'error' is >= 0
if (error < 0)
^~~~~~~~~
fs/pipe.c:949:2: note: Taking false branch
if (error < 0)
^
fs/pipe.c:954:6: note: Assuming 'error' is >= 0
if (error < 0)
^~~~~~~~~
fs/pipe.c:954:2: note: Taking false branch
if (error < 0)
^
fs/pipe.c:961:2: note: Returning zero, which participates in a condition later
return 0;
^~~~~~~~
fs/pipe.c:992:10: note: Returning from '__do_pipe_flags'
error = __do_pipe_flags(fd, files, flags);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/pipe.c:993:7: note: 'error' is 0
if (!error) {
^~~~~
fs/pipe.c:993:2: note: Taking true branch
if (!error) {
^
fs/pipe.c:994:7: note: Assuming the condition is true
if (unlikely(copy_to_user(fildes, fd, sizeof(fd)))) {
^
include/linux/compiler.h:78:40: note: expanded from macro 'unlikely'
# define unlikely(x) __builtin_expect(!!(x), 0)
^~~~
fs/pipe.c:994:3: note: Taking false branch
if (unlikely(copy_to_user(fildes, fd, sizeof(fd)))) {
^
fs/pipe.c:1002:4: note: 2nd function call argument is an uninitialized value
fd_install(fd[1], files[1]);
^ ~~~~~~~~
Suppressed 10 warnings (5 in non-user code, 5 with check filters).
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.
Suppressed 5 warnings (5 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.
7 warnings generated.
>> mm/page_pinner.c:312:2: warning: Value stored to 'page_pinner' is never read [clang-analyzer-deadcode.DeadStores]
page_pinner = get_page_pinner(page_ext);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~
mm/page_pinner.c:312:2: note: Value stored to 'page_pinner' is never read
page_pinner = get_page_pinner(page_ext);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~
Suppressed 6 warnings (5 in non-user code, 1 with check filters).
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.
Suppressed 5 warnings (5 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.
Suppressed 5 warnings (5 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.
Suppressed 5 warnings (5 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.
4 warnings generated.
Suppressed 4 warnings (4 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.
1 warning generated.
Suppressed 1 warnings (1 with check filters).
5 warnings generated.
Suppressed 5 warnings (5 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.
7 warnings generated.
Suppressed 7 warnings (6 in non-user code, 1 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (6 in non-user code, 1 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (6 in non-user code, 1 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (6 in non-user code, 1 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
14 warnings generated.
drivers/scsi/aic7xxx/aic79xx_osm.c:561:2: 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(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n"
^~~~~~
drivers/scsi/aic7xxx/aic79xx_osm.c:561:2: 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(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n"
^~~~~~
drivers/scsi/aic7xxx/aic79xx_osm.c:563:2: warning: Call to function 'strcat' 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 'strlcat'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
strcat(bp, ahd->description);
^~~~~~
drivers/scsi/aic7xxx/aic79xx_osm.c:563:2: note: Call to function 'strcat' 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 'strlcat'. CWE-119
strcat(bp, ahd->description);
^~~~~~
drivers/scsi/aic7xxx/aic79xx_osm.c:564:2: warning: Call to function 'strcat' 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 'strlcat'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
strcat(bp, ">\n"
^~~~~~
drivers/scsi/aic7xxx/aic79xx_osm.c:564:2: note: Call to function 'strcat' 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 'strlcat'. CWE-119
strcat(bp, ">\n"
^~~~~~
drivers/scsi/aic7xxx/aic79xx_osm.c:567:2: warning: Call to function 'strcat' 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 'strlcat'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
strcat(bp, ahd_info);
^~~~~~
drivers/scsi/aic7xxx/aic79xx_osm.c:567:2: note: Call to function 'strcat' 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 'strlcat'. CWE-119
strcat(bp, ahd_info);
^~~~~~
drivers/scsi/aic7xxx/aic79xx_osm.c:649:2: warning: Value stored to 'tinfo' is never read [clang-analyzer-deadcode.DeadStores]
tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/scsi/aic7xxx/aic79xx_osm.c:649:2: note: Value stored to 'tinfo' is never read
tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/scsi/aic7xxx/aic79xx_osm.c:1239:3: 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(new_name, buf);
^~~~~~
drivers/scsi/aic7xxx/aic79xx_osm.c:1239:3: 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(new_name, buf);
^~~~~~
drivers/scsi/aic7xxx/aic79xx_osm.c:2257:2: warning: Value stored to 'saved_scsiid' is never read [clang-analyzer-deadcode.DeadStores]
saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/scsi/aic7xxx/aic79xx_osm.c:2257:2: note: Value stored to 'saved_scsiid' is never read
saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~
Suppressed 7 warnings (6 in non-user code, 1 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
kernel/trace/ring_buffer.c:1985:2: warning: Value stored to 'size' is never read [clang-analyzer-deadcode.DeadStores]
size = nr_pages * BUF_PAGE_SIZE;
^ ~~~~~~~~~~~~~~~~~~~~~~~~
kernel/trace/ring_buffer.c:1985:2: note: Value stored to 'size' is never read
size = nr_pages * BUF_PAGE_SIZE;
^ ~~~~~~~~~~~~~~~~~~~~~~~~
Suppressed 6 warnings (5 in non-user code, 1 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
11 warnings generated.
kernel/trace/trace.c:353:2: warning: Access to field 'next' results in a dereference of a null pointer [clang-analyzer-core.NullDereference]
rcu_assign_pointer(*p, (*p)->next);
^
include/linux/rcupdate.h:424:35: note: expanded from macro 'rcu_assign_pointer'
uintptr_t _r_a_p__v = (uintptr_t)(v); \
^
kernel/trace/trace.c:396:2: note: Value assigned to 'ftrace_exports_list'
mutex_lock(&ftrace_export_lock);
^

vim +/page_pinner +304 mm/page_pinner.c

300
301 void __page_pinner_migration_failed(struct page *page)
302 {
303 struct page_ext *page_ext = lookup_page_ext(page);
> 304 struct page_pinner *page_pinner;
305 depot_stack_handle_t handle;
306 unsigned long flags;
307 unsigned int idx;
308
309 if (unlikely(!page_ext))
310 return;
311
> 312 page_pinner = get_page_pinner(page_ext);
313 if (!test_bit(PAGE_EXT_PINNER_MIGRATION_FAILED, &page_ext->flags))
314 return;
315
316 handle = save_stack(GFP_NOWAIT|__GFP_NOWARN);
317
318 spin_lock_irqsave(&acf_pinner.lock, flags);
319 idx = acf_pinner.index++;
320 acf_pinner.index %= LONTERM_PIN_BUCKETS;
321
322 acf_pinner.pinner[idx].handle = handle;
323 acf_pinner.pinner[idx].ts_usec = ktime_to_us(ktime_get_boottime());
324 acf_pinner.pinner[idx].page_flags = page->flags;
325 acf_pinner.pinner[idx].page_mt = get_pageblock_migratetype(page);
326 acf_pinner.pinner[idx].pfn = page_to_pfn(page);
327 spin_unlock_irqrestore(&acf_pinner.lock, flags);
328 }
329 EXPORT_SYMBOL(__page_pinner_migration_failed);
330

---
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