arch/powerpc/sysdev/xive/common.c:1845:50: warning: '%ld' directive output may be truncated writing between 1 and 20 bytes into a region of size 13
From: kernel test robot
Date: Wed Oct 18 2023 - 07:01:17 EST
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 06dc10eae55b5ceabfef287a7e5f16ceea204aa0
commit: 33e67710beda78aed38a2fe10be6088d4aeb1c53 cpumask: switch for_each_cpu{,_not} to use for_each_bit()
date: 1 year, 1 month ago
config: powerpc64-randconfig-r003-20230828 (https://download.01.org/0day-ci/archive/20231018/202310181858.EyyD4USk-lkp@xxxxxxxxx/config)
compiler: powerpc64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231018/202310181858.EyyD4USk-lkp@xxxxxxxxx/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202310181858.EyyD4USk-lkp@xxxxxxxxx/
All warnings (new ones prefixed by >>):
arch/powerpc/sysdev/xive/common.c: In function 'xive_core_debug_init':
>> arch/powerpc/sysdev/xive/common.c:1845:50: warning: '%ld' directive output may be truncated writing between 1 and 20 bytes into a region of size 13 [-Wformat-truncation=]
1845 | snprintf(name, sizeof(name), "cpu%ld", cpu);
| ^~~
In function 'xive_core_debugfs_create',
inlined from 'xive_core_debug_init' at arch/powerpc/sysdev/xive/common.c:1861:3:
arch/powerpc/sysdev/xive/common.c:1845:46: note: directive argument in the range [-9223372036854775808, 4294967294]
1845 | snprintf(name, sizeof(name), "cpu%ld", cpu);
| ^~~~~~~~
arch/powerpc/sysdev/xive/common.c:1845:17: note: 'snprintf' output between 5 and 24 bytes into a destination of size 16
1845 | snprintf(name, sizeof(name), "cpu%ld", cpu);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
arch/powerpc/platforms/pseries/lpar.c: In function '__machine_initcall_pseries_vpa_debugfs_init':
>> arch/powerpc/platforms/pseries/lpar.c:2032:36: warning: '%ld' directive writing between 1 and 20 bytes into a region of size 12 [-Wformat-overflow=]
2032 | sprintf(name, "cpu-%ld", i);
| ^~~
In function 'vpa_debugfs_init',
inlined from '__machine_initcall_pseries_vpa_debugfs_init' at arch/powerpc/platforms/pseries/lpar.c:2038:1:
arch/powerpc/platforms/pseries/lpar.c:2032:31: note: directive argument in the range [-9223372036854775808, 4294967294]
2032 | sprintf(name, "cpu-%ld", i);
| ^~~~~~~~~
arch/powerpc/platforms/pseries/lpar.c:2032:17: note: 'sprintf' output between 6 and 25 bytes into a destination of size 16
2032 | sprintf(name, "cpu-%ld", i);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
vim +1845 arch/powerpc/sysdev/xive/common.c
08f3f610214f39 Cédric Le Goater 2021-11-05 1827
412877dfae3dc1 Cédric Le Goater 2021-11-05 1828 static void xive_core_debugfs_create(void)
930914b7d528fc Cédric Le Goater 2020-03-06 1829 {
baed14de78b5ee Cédric Le Goater 2021-11-05 1830 struct dentry *xive_dir;
08f3f610214f39 Cédric Le Goater 2021-11-05 1831 struct dentry *xive_eq_dir;
08f3f610214f39 Cédric Le Goater 2021-11-05 1832 long cpu;
08f3f610214f39 Cédric Le Goater 2021-11-05 1833 char name[16];
baed14de78b5ee Cédric Le Goater 2021-11-05 1834
baed14de78b5ee Cédric Le Goater 2021-11-05 1835 xive_dir = debugfs_create_dir("xive", arch_debugfs_dir);
baed14de78b5ee Cédric Le Goater 2021-11-05 1836 if (IS_ERR(xive_dir))
baed14de78b5ee Cédric Le Goater 2021-11-05 1837 return;
baed14de78b5ee Cédric Le Goater 2021-11-05 1838
33e1d4a152ce55 Cédric Le Goater 2021-11-05 1839 debugfs_create_file("ipis", 0400, xive_dir,
33e1d4a152ce55 Cédric Le Goater 2021-11-05 1840 NULL, &xive_ipi_debug_fops);
baed14de78b5ee Cédric Le Goater 2021-11-05 1841 debugfs_create_file("interrupts", 0400, xive_dir,
baed14de78b5ee Cédric Le Goater 2021-11-05 1842 NULL, &xive_irq_debug_fops);
08f3f610214f39 Cédric Le Goater 2021-11-05 1843 xive_eq_dir = debugfs_create_dir("eqs", xive_dir);
08f3f610214f39 Cédric Le Goater 2021-11-05 1844 for_each_possible_cpu(cpu) {
08f3f610214f39 Cédric Le Goater 2021-11-05 @1845 snprintf(name, sizeof(name), "cpu%ld", cpu);
08f3f610214f39 Cédric Le Goater 2021-11-05 1846 debugfs_create_file(name, 0400, xive_eq_dir, (void *)cpu,
08f3f610214f39 Cédric Le Goater 2021-11-05 1847 &xive_eq_debug_fops);
08f3f610214f39 Cédric Le Goater 2021-11-05 1848 }
d7bc1e376cb786 Cédric Le Goater 2021-11-05 1849 debugfs_create_bool("store-eoi", 0600, xive_dir, &xive_store_eoi);
2a2ac8a7018b95 Cédric Le Goater 2021-12-01 1850
2a2ac8a7018b95 Cédric Le Goater 2021-12-01 1851 if (xive_ops->debug_create)
2a2ac8a7018b95 Cédric Le Goater 2021-12-01 1852 xive_ops->debug_create(xive_dir);
412877dfae3dc1 Cédric Le Goater 2021-11-05 1853 }
412877dfae3dc1 Cédric Le Goater 2021-11-05 1854 #else
412877dfae3dc1 Cédric Le Goater 2021-11-05 1855 static inline void xive_core_debugfs_create(void) { }
412877dfae3dc1 Cédric Le Goater 2021-11-05 1856 #endif /* CONFIG_DEBUG_FS */
412877dfae3dc1 Cédric Le Goater 2021-11-05 1857
:::::: The code at line 1845 was first introduced by commit
:::::: 08f3f610214f395561bbda03344e641579f6e917 powerpc/xive: Add a debugfs file to dump EQs
:::::: TO: Cédric Le Goater <clg@xxxxxxxx>
:::::: CC: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
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