CC: [email protected] CC: [email protected] CC: [email protected] TO: Peter Zijlstra <[email protected]> CC: Thomas Gleixner <[email protected]>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 0280e3c58f92b2fe0e8fbbdf8d386449168de4a8 commit: b968e84b509da593c50dc3db679e1d33de701f78 x86/iopl: Fake iopl(3) CLI/STI usage date: 4 months ago :::::: branch date: 9 hours ago :::::: commit date: 4 months ago config: x86_64-randconfig-c007-20220124 (https://download.01.org/0day-ci/archive/20220126/[email protected]/config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 7b3d30728816403d1fd73cc5082e9fb761262bce) 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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b968e84b509da593c50dc3db679e1d33de701f78 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout b968e84b509da593c50dc3db679e1d33de701f78 # 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 <[email protected]> clang-analyzer warnings: (new ones prefixed by >>) ^ include/linux/minmax.h:38:3: note: expanded from macro '__careful_cmp' __cmp_once(x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y), op)) ^ include/linux/minmax.h:33:3: note: expanded from macro '__cmp_once' __cmp(unique_x, unique_y, op); }) ^ include/linux/minmax.h:28:26: note: expanded from macro '__cmp' #define __cmp(x, y, op) ((x) op (y) ? (x) : (y)) ^ drivers/hwmon/adc128d818.c:217:2: note: The value -128 is assigned to 'regval' regval = clamp_val(DIV_ROUND_CLOSEST(val, 1000), -128, 127); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/hwmon/adc128d818.c:218:29: note: The result of the left shift is undefined because the left operand is negative data->temp[index] = regval << 1; ~~~~~~ ^ 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. 3 warnings generated. drivers/video/fbdev/s1d13xxxfb.c:681:2: warning: Value stored to 'is_dual' is never read [clang-analyzer-deadcode.DeadStores] is_dual = (panel & 0x02) != 0; ^ ~~~~~~~~~~~~~~~~~~~ drivers/video/fbdev/s1d13xxxfb.c:681:2: note: Value stored to 'is_dual' is never read is_dual = (panel & 0x02) != 0; ^ ~~~~~~~~~~~~~~~~~~~ drivers/video/fbdev/s1d13xxxfb.c:683:2: warning: Value stored to 'lcd_bpp' is never read [clang-analyzer-deadcode.DeadStores] lcd_bpp = s1d13xxxfb_width_tab[is_tft][(panel >> 4) & 3]; ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/video/fbdev/s1d13xxxfb.c:683:2: note: Value stored to 'lcd_bpp' is never read lcd_bpp = s1d13xxxfb_width_tab[is_tft][(panel >> 4) & 3]; ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 2 warnings generated. >> arch/x86/kernel/traps.c:533:24: warning: Value stored to 't' during its >> initialization is never read [clang-analyzer-deadcode.DeadStores] struct thread_struct *t = ¤t->thread; ^ ~~~~~~~~~~~~~~~~ arch/x86/kernel/traps.c:533:24: note: Value stored to 't' during its initialization is never read struct thread_struct *t = ¤t->thread; ^ ~~~~~~~~~~~~~~~~ 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. 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. 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. 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. 3 warnings generated. drivers/pci/setup-bus.c:87:2: warning: Use of memory after it is freed [clang-analyzer-unix.Malloc] list_for_each_entry_safe(dev_res, tmp, head, list) { ^ include/linux/list.h:716:7: note: expanded from macro 'list_for_each_entry_safe' n = list_next_entry(pos, member); \ ^ include/linux/list.h:555:2: note: expanded from macro 'list_next_entry' list_entry((pos)->member.next, typeof(*(pos)), member) ^ include/linux/list.h:511:2: note: expanded from macro 'list_entry' container_of(ptr, type, member) ^ include/linux/kernel.h:494:25: note: expanded from macro 'container_of' void *__mptr = (void *)(ptr); \ ^ drivers/pci/setup-bus.c:1907:6: note: Assuming field 'parent' is non-null if (!io_res->parent && align) ^~~~~~~~~~~~~~~ drivers/pci/setup-bus.c:1907:22: note: Left side of '&&' is false if (!io_res->parent && align) ^ drivers/pci/setup-bus.c:1911:6: note: Assuming field 'parent' is non-null if (!mmio_res->parent && align) ^~~~~~~~~~~~~~~~~ drivers/pci/setup-bus.c:1911:24: note: Left side of '&&' is false if (!mmio_res->parent && align) ^ drivers/pci/setup-bus.c:1915:6: note: Assuming field 'parent' is non-null if (!mmio_pref_res->parent && align) ^~~~~~~~~~~~~~~~~~~~~~ drivers/pci/setup-bus.c:1915:29: note: Left side of '&&' is false if (!mmio_pref_res->parent && align) ^ drivers/pci/setup-bus.c:1923:2: note: Calling 'adjust_bridge_window' adjust_bridge_window(bridge, io_res, add_list, resource_size(&io)); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/pci/setup-bus.c:1867:6: note: Assuming field 'parent' is null if (res->parent) ^~~~~~~~~~~ drivers/pci/setup-bus.c:1867:2: note: Taking false branch if (res->parent) ^ drivers/pci/setup-bus.c:1870:6: note: Assuming 'new_size' is not equal to 0 if (!new_size) ^~~~~~~~~ drivers/pci/setup-bus.c:1870:2: note: Taking false branch if (!new_size) ^ drivers/pci/setup-bus.c:1873:6: note: Assuming 'new_size' is <= 'size' if (new_size > size) { ^~~~~~~~~~~~~~~ drivers/pci/setup-bus.c:1873:2: note: Taking false branch if (new_size > size) { ^ drivers/pci/setup-bus.c:1877:13: note: Assuming 'new_size' is >= 'size' } else if (new_size < size) { ^~~~~~~~~~~~~~~ drivers/pci/setup-bus.c:1877:9: note: Taking false branch } else if (new_size < size) { ^ drivers/pci/setup-bus.c:1884:2: note: Calling 'remove_from_list' remove_from_list(add_list, res); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/pci/setup-bus.c:87:2: note: Left side of '&&' is false list_for_each_entry_safe(dev_res, tmp, head, list) { ^ include/linux/list.h:715:13: note: expanded from macro 'list_for_each_entry_safe' for (pos = list_first_entry(head, typeof(*pos), member), \ ^ include/linux/list.h:522:2: note: expanded from macro 'list_first_entry' list_entry((ptr)->next, type, member) ^ include/linux/list.h:511:2: note: expanded from macro 'list_entry' container_of(ptr, type, member) vim +/t +533 arch/x86/kernel/traps.c 59c1dcbed5b51ca Jann Horn 2019-12-19 530 b968e84b509da59 Peter Zijlstra 2021-09-17 531 static bool fixup_iopl_exception(struct pt_regs *regs) b968e84b509da59 Peter Zijlstra 2021-09-17 532 { b968e84b509da59 Peter Zijlstra 2021-09-17 @533 struct thread_struct *t = ¤t->thread; b968e84b509da59 Peter Zijlstra 2021-09-17 534 unsigned char byte; b968e84b509da59 Peter Zijlstra 2021-09-17 535 unsigned long ip; b968e84b509da59 Peter Zijlstra 2021-09-17 536 b968e84b509da59 Peter Zijlstra 2021-09-17 537 if (!IS_ENABLED(CONFIG_X86_IOPL_IOPERM) || t->iopl_emul != 3) b968e84b509da59 Peter Zijlstra 2021-09-17 538 return false; b968e84b509da59 Peter Zijlstra 2021-09-17 539 b968e84b509da59 Peter Zijlstra 2021-09-17 540 if (insn_get_effective_ip(regs, &ip)) b968e84b509da59 Peter Zijlstra 2021-09-17 541 return false; b968e84b509da59 Peter Zijlstra 2021-09-17 542 b968e84b509da59 Peter Zijlstra 2021-09-17 543 if (get_user(byte, (const char __user *)ip)) b968e84b509da59 Peter Zijlstra 2021-09-17 544 return false; b968e84b509da59 Peter Zijlstra 2021-09-17 545 b968e84b509da59 Peter Zijlstra 2021-09-17 546 if (byte != 0xfa && byte != 0xfb) b968e84b509da59 Peter Zijlstra 2021-09-17 547 return false; b968e84b509da59 Peter Zijlstra 2021-09-17 548 b968e84b509da59 Peter Zijlstra 2021-09-17 549 if (!t->iopl_warn && printk_ratelimit()) { b968e84b509da59 Peter Zijlstra 2021-09-17 550 pr_err("%s[%d] attempts to use CLI/STI, pretending it's a NOP, ip:%lx", b968e84b509da59 Peter Zijlstra 2021-09-17 551 current->comm, task_pid_nr(current), ip); b968e84b509da59 Peter Zijlstra 2021-09-17 552 print_vma_addr(KERN_CONT " in ", ip); b968e84b509da59 Peter Zijlstra 2021-09-17 553 pr_cont("\n"); b968e84b509da59 Peter Zijlstra 2021-09-17 554 t->iopl_warn = 1; b968e84b509da59 Peter Zijlstra 2021-09-17 555 } b968e84b509da59 Peter Zijlstra 2021-09-17 556 b968e84b509da59 Peter Zijlstra 2021-09-17 557 regs->ip += 1; b968e84b509da59 Peter Zijlstra 2021-09-17 558 return true; b968e84b509da59 Peter Zijlstra 2021-09-17 559 } b968e84b509da59 Peter Zijlstra 2021-09-17 560 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected] _______________________________________________ kbuild mailing list -- [email protected] To unsubscribe send an email to [email protected]
