CC: [email protected] CC: [email protected] BCC: [email protected] CC: [email protected] TO: Chris Down <[email protected]> CC: Petr Mladek <[email protected]>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: f443e374ae131c168a065ea1748feac6b2e76613 commit: 337015573718b161891a3473d25f59273f2e626b printk: Userspace format indexing support date: 8 months ago :::::: branch date: 20 hours ago :::::: commit date: 8 months ago config: arm-randconfig-c002-20220312 (https://download.01.org/0day-ci/archive/20220321/[email protected]/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 276ca87382b8f16a65bddac700202924228982f6) 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=337015573718b161891a3473d25f59273f2e626b git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 337015573718b161891a3473d25f59273f2e626b # 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 <[email protected]> clang-analyzer warnings: (new ones prefixed by >>) ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ fs/ufs/dir.c:179:2: note: Value stored to 'p' is never read p = (struct ufs_dir_entry *)(kaddr + offs); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Suppressed 7 warnings (7 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. 10 warnings generated. Suppressed 10 warnings (10 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. Suppressed 10 warnings (10 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. Suppressed 10 warnings (10 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. Suppressed 10 warnings (10 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. Suppressed 10 warnings (10 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. Suppressed 10 warnings (10 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. Suppressed 10 warnings (10 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. Suppressed 10 warnings (10 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 (7 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 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 (7 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 (7 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 (7 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 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 (7 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 (7 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 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 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. 7 warnings generated. Suppressed 7 warnings (7 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. 7 warnings generated. Suppressed 7 warnings (7 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. 7 warnings generated. fs/bfs/dir.c:228:2: warning: Value stored to 'error' is never read [clang-analyzer-deadcode.DeadStores] error = -EPERM; ^ ~~~~~~ fs/bfs/dir.c:228:2: note: Value stored to 'error' is never read error = -EPERM; ^ ~~~~~~ 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. 8 warnings generated. Suppressed 8 warnings (8 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. 8 warnings generated. Suppressed 8 warnings (8 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. 8 warnings generated. Suppressed 8 warnings (8 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. 58 warnings generated. >> drivers/gpu/drm/radeon/radeon_atombios.c:2816:4: warning: Dereference of >> null pointer [clang-analyzer-core.NullDereference] rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.voltage; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/radeon/radeon_atombios.c:2765:6: note: Assuming the condition is true if (atom_parse_data_header(mode_info->atom_context, index, NULL, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/radeon/radeon_atombios.c:2765:2: note: Taking true branch if (atom_parse_data_header(mode_info->atom_context, index, NULL, ^ drivers/gpu/drm/radeon/radeon_atombios.c:2767:3: note: Control jumps to 'case 5:' at line 2774 switch (frev) { ^ drivers/gpu/drm/radeon/radeon_atombios.c:2776:4: note: Execution continues on line 2785 break; ^ drivers/gpu/drm/radeon/radeon_atombios.c:2785:6: note: 'state_index' is equal to 0 if (state_index == 0) { ^~~~~~~~~~~ drivers/gpu/drm/radeon/radeon_atombios.c:2785:2: note: Taking true branch if (state_index == 0) { ^ drivers/gpu/drm/radeon/radeon_atombios.c:2786:26: note: Calling 'kzalloc' rdev->pm.power_state = kzalloc(sizeof(struct radeon_power_state), GFP_KERNEL); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/slab.h:721:9: note: Calling 'kmalloc' return kmalloc(size, flags | __GFP_ZERO); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/slab.h:579:2: note: Taking false branch if (__builtin_constant_p(size)) { ^ include/linux/slab.h:596:2: note: Returning pointer return __kmalloc(size, flags); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/slab.h:721:9: note: Returning from 'kmalloc' return kmalloc(size, flags | __GFP_ZERO); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/slab.h:721:2: note: Returning pointer return kmalloc(size, flags | __GFP_ZERO); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/radeon/radeon_atombios.c:2786:26: note: Returning from 'kzalloc' rdev->pm.power_state = kzalloc(sizeof(struct radeon_power_state), GFP_KERNEL); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/radeon/radeon_atombios.c:2786:3: note: Value assigned to field 'power_state' rdev->pm.power_state = kzalloc(sizeof(struct radeon_power_state), GFP_KERNEL); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/radeon/radeon_atombios.c:2787:7: note: Assuming field 'power_state' is null if (rdev->pm.power_state) { ^~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/radeon/radeon_atombios.c:2787:3: note: Taking false branch if (rdev->pm.power_state) { ^ drivers/gpu/drm/radeon/radeon_atombios.c:2814:6: note: Assuming field 'default_power_state_index' is >= 0 if (rdev->pm.default_power_state_index >= 0) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/radeon/radeon_atombios.c:2814:2: note: Taking true branch if (rdev->pm.default_power_state_index >= 0) ^ drivers/gpu/drm/radeon/radeon_atombios.c:2816:4: note: Dereference of null pointer rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.voltage; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Suppressed 57 warnings (8 in non-user code, 49 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 (7 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 (7 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 (7 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 (7 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. 14 warnings generated. drivers/scsi/sg.c:701:3: warning: 4th function call argument is an uninitialized value [clang-analyzer-core.CallAndMessage] printk_ratelimited(KERN_WARNING ^ include/linux/printk.h:628:3: note: expanded from macro 'printk_ratelimited' printk(fmt, ##__VA_ARGS__); \ ^ ~~~~~~~~~~~ include/linux/printk.h:434:44: note: expanded from macro 'printk' #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__) ^ ~~~~~~~~~~~ include/linux/printk.h:430:3: note: expanded from macro 'printk_index_wrap' _p_func(_fmt, ##__VA_ARGS__); \ ^ ~~~~~~~~~~~ drivers/scsi/sg.c:615:11: note: Calling 'sg_check_file_access' retval = sg_check_file_access(filp, __func__); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/scsi/sg.c:222:22: note: Left side of '&&' is false if (filp->f_cred != current_real_cred()) { ^ include/linux/cred.h:308:2: note: expanded from macro 'current_real_cred' rcu_dereference_protected(current->real_cred, 1) ^ include/linux/rcupdate.h:587:2: note: expanded from macro 'rcu_dereference_protected' __rcu_dereference_protected((p), (c), __rcu) vim +2816 drivers/gpu/drm/radeon/radeon_atombios.c b0e664140a1703 Alex Deucher 2010-11-22 2754 560154e9a27f2f Alex Deucher 2010-11-22 2755 void radeon_atombios_get_power_modes(struct radeon_device *rdev) 560154e9a27f2f Alex Deucher 2010-11-22 2756 { 560154e9a27f2f Alex Deucher 2010-11-22 2757 struct radeon_mode_info *mode_info = &rdev->mode_info; 560154e9a27f2f Alex Deucher 2010-11-22 2758 int index = GetIndexIntoMasterTable(DATA, PowerPlayInfo); 560154e9a27f2f Alex Deucher 2010-11-22 2759 u16 data_offset; 560154e9a27f2f Alex Deucher 2010-11-22 2760 u8 frev, crev; 560154e9a27f2f Alex Deucher 2010-11-22 2761 int state_index = 0; 560154e9a27f2f Alex Deucher 2010-11-22 2762 560154e9a27f2f Alex Deucher 2010-11-22 2763 rdev->pm.default_power_state_index = -1; 560154e9a27f2f Alex Deucher 2010-11-22 2764 560154e9a27f2f Alex Deucher 2010-11-22 2765 if (atom_parse_data_header(mode_info->atom_context, index, NULL, 560154e9a27f2f Alex Deucher 2010-11-22 2766 &frev, &crev, &data_offset)) { 560154e9a27f2f Alex Deucher 2010-11-22 2767 switch (frev) { 560154e9a27f2f Alex Deucher 2010-11-22 2768 case 1: 560154e9a27f2f Alex Deucher 2010-11-22 2769 case 2: 560154e9a27f2f Alex Deucher 2010-11-22 2770 case 3: 560154e9a27f2f Alex Deucher 2010-11-22 2771 state_index = radeon_atombios_parse_power_table_1_3(rdev); 560154e9a27f2f Alex Deucher 2010-11-22 2772 break; 560154e9a27f2f Alex Deucher 2010-11-22 2773 case 4: 560154e9a27f2f Alex Deucher 2010-11-22 2774 case 5: 560154e9a27f2f Alex Deucher 2010-11-22 2775 state_index = radeon_atombios_parse_power_table_4_5(rdev); 560154e9a27f2f Alex Deucher 2010-11-22 2776 break; b0e664140a1703 Alex Deucher 2010-11-22 2777 case 6: b0e664140a1703 Alex Deucher 2010-11-22 2778 state_index = radeon_atombios_parse_power_table_6(rdev); b0e664140a1703 Alex Deucher 2010-11-22 2779 break; 560154e9a27f2f Alex Deucher 2010-11-22 2780 default: 560154e9a27f2f Alex Deucher 2010-11-22 2781 break; 56278a8edacee9 Alex Deucher 2009-12-28 2782 } f8e6bfc2ce1628 Alex Deucher 2013-04-25 2783 } f8e6bfc2ce1628 Alex Deucher 2013-04-25 2784 f8e6bfc2ce1628 Alex Deucher 2013-04-25 2785 if (state_index == 0) { 0975b16274bad1 Alex Deucher 2011-02-02 2786 rdev->pm.power_state = kzalloc(sizeof(struct radeon_power_state), GFP_KERNEL); 0975b16274bad1 Alex Deucher 2011-02-02 2787 if (rdev->pm.power_state) { 8f3f1c9a22a642 Alex Deucher 2011-11-04 2788 rdev->pm.power_state[0].clock_info = 6396bb221514d2 Kees Cook 2018-06-12 2789 kcalloc(1, 6396bb221514d2 Kees Cook 2018-06-12 2790 sizeof(struct radeon_pm_clock_info), 6396bb221514d2 Kees Cook 2018-06-12 2791 GFP_KERNEL); 8f3f1c9a22a642 Alex Deucher 2011-11-04 2792 if (rdev->pm.power_state[0].clock_info) { 56278a8edacee9 Alex Deucher 2009-12-28 2793 /* add the default mode */ 0ec0e74f784ca0 Alex Deucher 2009-12-23 2794 rdev->pm.power_state[state_index].type = 0ec0e74f784ca0 Alex Deucher 2009-12-23 2795 POWER_STATE_TYPE_DEFAULT; 56278a8edacee9 Alex Deucher 2009-12-28 2796 rdev->pm.power_state[state_index].num_clock_modes = 1; 56278a8edacee9 Alex Deucher 2009-12-28 2797 rdev->pm.power_state[state_index].clock_info[0].mclk = rdev->clock.default_mclk; 56278a8edacee9 Alex Deucher 2009-12-28 2798 rdev->pm.power_state[state_index].clock_info[0].sclk = rdev->clock.default_sclk; 56278a8edacee9 Alex Deucher 2009-12-28 2799 rdev->pm.power_state[state_index].default_clock_mode = 56278a8edacee9 Alex Deucher 2009-12-28 2800 &rdev->pm.power_state[state_index].clock_info[0]; 56278a8edacee9 Alex Deucher 2009-12-28 2801 rdev->pm.power_state[state_index].clock_info[0].voltage.type = VOLTAGE_NONE; 79daedc942813c Alex Deucher 2010-04-22 2802 rdev->pm.power_state[state_index].pcie_lanes = 16; a48b9b4edb8bb8 Alex Deucher 2010-04-22 2803 rdev->pm.default_power_state_index = state_index; a48b9b4edb8bb8 Alex Deucher 2010-04-22 2804 rdev->pm.power_state[state_index].flags = 0; 56278a8edacee9 Alex Deucher 2009-12-28 2805 state_index++; 56278a8edacee9 Alex Deucher 2009-12-28 2806 } 0975b16274bad1 Alex Deucher 2011-02-02 2807 } 8f3f1c9a22a642 Alex Deucher 2011-11-04 2808 } 02b17cc05372ab Alex Deucher 2010-04-22 2809 56278a8edacee9 Alex Deucher 2009-12-28 2810 rdev->pm.num_power_states = state_index; 771fe6b912fca5 Jerome Glisse 2009-06-05 2811 a48b9b4edb8bb8 Alex Deucher 2010-04-22 2812 rdev->pm.current_power_state_index = rdev->pm.default_power_state_index; a48b9b4edb8bb8 Alex Deucher 2010-04-22 2813 rdev->pm.current_clock_mode_index = 0; 4376eee92e5a83 Alexander Müller 2011-12-30 2814 if (rdev->pm.default_power_state_index >= 0) 4376eee92e5a83 Alexander Müller 2011-12-30 2815 rdev->pm.current_vddc = 4376eee92e5a83 Alexander Müller 2011-12-30 @2816 rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.voltage; 4376eee92e5a83 Alexander Müller 2011-12-30 2817 else 4376eee92e5a83 Alexander Müller 2011-12-30 2818 rdev->pm.current_vddc = 0; 56278a8edacee9 Alex Deucher 2009-12-28 2819 } 56278a8edacee9 Alex Deucher 2009-12-28 2820 :::::: The code at line 2816 was first introduced by commit :::::: 4376eee92e5a8332b470040e672ea99cd44c826a drm/radeon/kms/atom: fix possible segfault in pm setup :::::: TO: Alexander Müller <[email protected]> :::::: CC: Dave Airlie <[email protected]> -- 0-DAY CI Kernel Test Service https://01.org/lkp _______________________________________________ kbuild mailing list -- [email protected] To unsubscribe send an email to [email protected]
