CC: [email protected] CC: [email protected] TO: Alex Sverdlin <[email protected]> CC: "Russell King (Oracle)" <[email protected]>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: ee1703cda8dc777e937dec172da55beaf1a74919 commit: 79f32b221b18c15a98507b101ef4beb52444cc6f ARM: 9079/1: ftrace: Add MODULE_PLTS support date: 5 months ago :::::: branch date: 3 hours ago :::::: commit date: 5 months ago config: arm-randconfig-m031-20211104 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> Reported-by: Dan Carpenter <[email protected]> smatch warnings: arch/arm/kernel/module-plts.c:65 get_module_plt() warn: we never enter this loop vim +65 arch/arm/kernel/module-plts.c 79f32b221b18c1 Alex Sverdlin 2021-05-05 50 7d485f647c1f4a Ard Biesheuvel 2014-11-24 51 u32 get_module_plt(struct module *mod, unsigned long loc, Elf32_Addr val) 7d485f647c1f4a Ard Biesheuvel 2014-11-24 52 { b7ede5a1f5905a Ard Biesheuvel 2017-02-22 53 struct mod_plt_sec *pltsec = !in_init(mod, loc) ? &mod->arch.core : b7ede5a1f5905a Ard Biesheuvel 2017-02-22 54 &mod->arch.init; 79f32b221b18c1 Alex Sverdlin 2021-05-05 55 struct plt_entries *plt; 79f32b221b18c1 Alex Sverdlin 2021-05-05 56 int idx; 79f32b221b18c1 Alex Sverdlin 2021-05-05 57 79f32b221b18c1 Alex Sverdlin 2021-05-05 58 /* cache the address, ELF header is available only during module load */ 79f32b221b18c1 Alex Sverdlin 2021-05-05 59 if (!pltsec->plt_ent) 79f32b221b18c1 Alex Sverdlin 2021-05-05 60 pltsec->plt_ent = (struct plt_entries *)pltsec->plt->sh_addr; 79f32b221b18c1 Alex Sverdlin 2021-05-05 61 plt = pltsec->plt_ent; b7ede5a1f5905a Ard Biesheuvel 2017-02-22 62 79f32b221b18c1 Alex Sverdlin 2021-05-05 63 prealloc_fixed(pltsec, plt); 79f32b221b18c1 Alex Sverdlin 2021-05-05 64 79f32b221b18c1 Alex Sverdlin 2021-05-05 @65 for (idx = 0; idx < ARRAY_SIZE(fixed_plts); ++idx) 79f32b221b18c1 Alex Sverdlin 2021-05-05 66 if (plt->lit[idx] == val) 79f32b221b18c1 Alex Sverdlin 2021-05-05 67 return (u32)&plt->ldr[idx]; 35fa91eed817d2 Ard Biesheuvel 2016-08-16 68 79f32b221b18c1 Alex Sverdlin 2021-05-05 69 idx = 0; 66e94ba3c8ea5f Ard Biesheuvel 2016-08-18 70 /* 66e94ba3c8ea5f Ard Biesheuvel 2016-08-18 71 * Look for an existing entry pointing to 'val'. Given that the 66e94ba3c8ea5f Ard Biesheuvel 2016-08-18 72 * relocations are sorted, this will be the last entry we allocated. 66e94ba3c8ea5f Ard Biesheuvel 2016-08-18 73 * (if one exists). 66e94ba3c8ea5f Ard Biesheuvel 2016-08-18 74 */ b7ede5a1f5905a Ard Biesheuvel 2017-02-22 75 if (pltsec->plt_count > 0) { b7ede5a1f5905a Ard Biesheuvel 2017-02-22 76 plt += (pltsec->plt_count - 1) / PLT_ENT_COUNT; b7ede5a1f5905a Ard Biesheuvel 2017-02-22 77 idx = (pltsec->plt_count - 1) % PLT_ENT_COUNT; 7d485f647c1f4a Ard Biesheuvel 2014-11-24 78 66e94ba3c8ea5f Ard Biesheuvel 2016-08-18 79 if (plt->lit[idx] == val) 66e94ba3c8ea5f Ard Biesheuvel 2016-08-18 80 return (u32)&plt->ldr[idx]; 66e94ba3c8ea5f Ard Biesheuvel 2016-08-18 81 66e94ba3c8ea5f Ard Biesheuvel 2016-08-18 82 idx = (idx + 1) % PLT_ENT_COUNT; 66e94ba3c8ea5f Ard Biesheuvel 2016-08-18 83 if (!idx) 66e94ba3c8ea5f Ard Biesheuvel 2016-08-18 84 plt++; 66e94ba3c8ea5f Ard Biesheuvel 2016-08-18 85 } 66e94ba3c8ea5f Ard Biesheuvel 2016-08-18 86 b7ede5a1f5905a Ard Biesheuvel 2017-02-22 87 pltsec->plt_count++; b7ede5a1f5905a Ard Biesheuvel 2017-02-22 88 BUG_ON(pltsec->plt_count * PLT_ENT_SIZE > pltsec->plt->sh_size); 7d485f647c1f4a Ard Biesheuvel 2014-11-24 89 66e94ba3c8ea5f Ard Biesheuvel 2016-08-18 90 if (!idx) 7d485f647c1f4a Ard Biesheuvel 2014-11-24 91 /* Populate a new set of entries */ 7d485f647c1f4a Ard Biesheuvel 2014-11-24 92 *plt = (struct plt_entries){ 7d485f647c1f4a Ard Biesheuvel 2014-11-24 93 { [0 ... PLT_ENT_COUNT - 1] = PLT_ENT_LDR, }, 7d485f647c1f4a Ard Biesheuvel 2014-11-24 94 { val, } 7d485f647c1f4a Ard Biesheuvel 2014-11-24 95 }; 66e94ba3c8ea5f Ard Biesheuvel 2016-08-18 96 else 66e94ba3c8ea5f Ard Biesheuvel 2016-08-18 97 plt->lit[idx] = val; 66e94ba3c8ea5f Ard Biesheuvel 2016-08-18 98 66e94ba3c8ea5f Ard Biesheuvel 2016-08-18 99 return (u32)&plt->ldr[idx]; 7d485f647c1f4a Ard Biesheuvel 2014-11-24 100 } 7d485f647c1f4a Ard Biesheuvel 2014-11-24 101 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected]
.config.gz
Description: application/gzip
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