* [tglx-devel:uaccess/masked 11/11] fs/select.c:781:4: error: cannot jump from this asm goto statement to one of its possible targets
@ 2025-10-16 1:06 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2025-10-16 1:06 UTC (permalink / raw)
To: Thomas Gleixner; +Cc: llvm, oe-kbuild-all
Hi Thomas,
FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git uaccess/masked
head: acabe15d70b5c158154ca2c0e766e8e90ca15a59
commit: acabe15d70b5c158154ca2c0e766e8e90ca15a59 [11/11] select: Convert to scoped masked user access
config: arm64-randconfig-001-20251016 (https://download.01.org/0day-ci/archive/20251016/202510160910.a7jVqyFo-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 39f292ffa13d7ca0d1edff27ac8fd55024bb4d19)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251016/202510160910.a7jVqyFo-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202510160910.a7jVqyFo-lkp@intel.com/
All errors (new ones prefixed by >>):
>> fs/select.c:781:4: error: cannot jump from this asm goto statement to one of its possible targets
781 | unsafe_get_user(to->size, &from->size, Efault);
| ^
arch/arm64/include/asm/uaccess.h:428:2: note: expanded from macro 'unsafe_get_user'
428 | __raw_get_mem("ldtr", x, uaccess_mask_ptr(ptr), label, U)
| ^
arch/arm64/include/asm/uaccess.h:220:3: note: expanded from macro '__raw_get_mem'
220 | __get_mem_asm(ldr, "%x", __gu_val, (ptr), label, type); \
| ^
arch/arm64/include/asm/uaccess.h:189:2: note: expanded from macro '__get_mem_asm'
189 | asm_goto_output( \
| ^
include/linux/compiler_types.h:513:31: note: expanded from macro 'asm_goto_output'
513 | #define asm_goto_output(x...) asm volatile goto(x)
| ^
fs/select.c:785:1: note: possible target of asm goto statement
785 | Efault:
| ^
fs/select.c:779:3: note: jump exits scope of variable with __attribute__((cleanup))
779 | scoped_masked_user_rw_access(from, Efault) {
| ^
include/linux/uaccess.h:831:2: note: expanded from macro 'scoped_masked_user_rw_access'
831 | scoped_masked_user_rw_access_size((_uptr), sizeof(*(_uptr)), _elbl)
| ^
include/linux/uaccess.h:819:2: note: expanded from macro 'scoped_masked_user_rw_access_size'
819 | __scoped_masked_user_access(rw, (_uptr), (_size), _elbl)
| ^
include/linux/uaccess.h:751:44: note: expanded from macro '__scoped_masked_user_access'
751 | for (CLASS(masked_user_##_mode##_access, scope) (_tmpptr); !____stop; \
| ^
>> fs/select.c:781:4: error: cannot jump from this asm goto statement to one of its possible targets
781 | unsafe_get_user(to->size, &from->size, Efault);
| ^
arch/arm64/include/asm/uaccess.h:428:2: note: expanded from macro 'unsafe_get_user'
428 | __raw_get_mem("ldtr", x, uaccess_mask_ptr(ptr), label, U)
| ^
arch/arm64/include/asm/uaccess.h:217:3: note: expanded from macro '__raw_get_mem'
217 | __get_mem_asm(ldr, "%w", __gu_val, (ptr), label, type); \
| ^
arch/arm64/include/asm/uaccess.h:189:2: note: expanded from macro '__get_mem_asm'
189 | asm_goto_output( \
| ^
include/linux/compiler_types.h:513:31: note: expanded from macro 'asm_goto_output'
513 | #define asm_goto_output(x...) asm volatile goto(x)
| ^
fs/select.c:785:1: note: possible target of asm goto statement
785 | Efault:
| ^
fs/select.c:779:3: note: jump exits scope of variable with __attribute__((cleanup))
779 | scoped_masked_user_rw_access(from, Efault) {
| ^
include/linux/uaccess.h:831:2: note: expanded from macro 'scoped_masked_user_rw_access'
831 | scoped_masked_user_rw_access_size((_uptr), sizeof(*(_uptr)), _elbl)
| ^
include/linux/uaccess.h:819:2: note: expanded from macro 'scoped_masked_user_rw_access_size'
819 | __scoped_masked_user_access(rw, (_uptr), (_size), _elbl)
| ^
include/linux/uaccess.h:751:44: note: expanded from macro '__scoped_masked_user_access'
751 | for (CLASS(masked_user_##_mode##_access, scope) (_tmpptr); !____stop; \
| ^
>> fs/select.c:781:4: error: cannot jump from this asm goto statement to one of its possible targets
781 | unsafe_get_user(to->size, &from->size, Efault);
| ^
arch/arm64/include/asm/uaccess.h:428:2: note: expanded from macro 'unsafe_get_user'
428 | __raw_get_mem("ldtr", x, uaccess_mask_ptr(ptr), label, U)
| ^
arch/arm64/include/asm/uaccess.h:214:3: note: expanded from macro '__raw_get_mem'
214 | __get_mem_asm(ldr "h", "%w", __gu_val, (ptr), label, type); \
| ^
arch/arm64/include/asm/uaccess.h:189:2: note: expanded from macro '__get_mem_asm'
189 | asm_goto_output( \
| ^
include/linux/compiler_types.h:513:31: note: expanded from macro 'asm_goto_output'
513 | #define asm_goto_output(x...) asm volatile goto(x)
| ^
fs/select.c:785:1: note: possible target of asm goto statement
785 | Efault:
| ^
fs/select.c:779:3: note: jump exits scope of variable with __attribute__((cleanup))
779 | scoped_masked_user_rw_access(from, Efault) {
| ^
include/linux/uaccess.h:831:2: note: expanded from macro 'scoped_masked_user_rw_access'
831 | scoped_masked_user_rw_access_size((_uptr), sizeof(*(_uptr)), _elbl)
| ^
include/linux/uaccess.h:819:2: note: expanded from macro 'scoped_masked_user_rw_access_size'
819 | __scoped_masked_user_access(rw, (_uptr), (_size), _elbl)
| ^
include/linux/uaccess.h:751:44: note: expanded from macro '__scoped_masked_user_access'
751 | for (CLASS(masked_user_##_mode##_access, scope) (_tmpptr); !____stop; \
| ^
>> fs/select.c:781:4: error: cannot jump from this asm goto statement to one of its possible targets
781 | unsafe_get_user(to->size, &from->size, Efault);
| ^
arch/arm64/include/asm/uaccess.h:428:2: note: expanded from macro 'unsafe_get_user'
428 | __raw_get_mem("ldtr", x, uaccess_mask_ptr(ptr), label, U)
| ^
arch/arm64/include/asm/uaccess.h:211:3: note: expanded from macro '__raw_get_mem'
211 | __get_mem_asm(ldr "b", "%w", __gu_val, (ptr), label, type); \
| ^
arch/arm64/include/asm/uaccess.h:189:2: note: expanded from macro '__get_mem_asm'
189 | asm_goto_output( \
| ^
include/linux/compiler_types.h:513:31: note: expanded from macro 'asm_goto_output'
513 | #define asm_goto_output(x...) asm volatile goto(x)
| ^
fs/select.c:785:1: note: possible target of asm goto statement
785 | Efault:
| ^
fs/select.c:779:3: note: jump exits scope of variable with __attribute__((cleanup))
779 | scoped_masked_user_rw_access(from, Efault) {
| ^
include/linux/uaccess.h:831:2: note: expanded from macro 'scoped_masked_user_rw_access'
831 | scoped_masked_user_rw_access_size((_uptr), sizeof(*(_uptr)), _elbl)
| ^
include/linux/uaccess.h:819:2: note: expanded from macro 'scoped_masked_user_rw_access_size'
819 | __scoped_masked_user_access(rw, (_uptr), (_size), _elbl)
| ^
include/linux/uaccess.h:751:44: note: expanded from macro '__scoped_masked_user_access'
751 | for (CLASS(masked_user_##_mode##_access, scope) (_tmpptr); !____stop; \
| ^
fs/select.c:780:4: error: cannot jump from this asm goto statement to one of its possible targets
780 | unsafe_get_user(to->p, &from->p, Efault);
| ^
arch/arm64/include/asm/uaccess.h:428:2: note: expanded from macro 'unsafe_get_user'
428 | __raw_get_mem("ldtr", x, uaccess_mask_ptr(ptr), label, U)
| ^
arch/arm64/include/asm/uaccess.h:220:3: note: expanded from macro '__raw_get_mem'
220 | __get_mem_asm(ldr, "%x", __gu_val, (ptr), label, type); \
| ^
arch/arm64/include/asm/uaccess.h:189:2: note: expanded from macro '__get_mem_asm'
189 | asm_goto_output( \
| ^
include/linux/compiler_types.h:513:31: note: expanded from macro 'asm_goto_output'
513 | #define asm_goto_output(x...) asm volatile goto(x)
| ^
fs/select.c:785:1: note: possible target of asm goto statement
785 | Efault:
| ^
fs/select.c:779:3: note: jump exits scope of variable with __attribute__((cleanup))
779 | scoped_masked_user_rw_access(from, Efault) {
| ^
include/linux/uaccess.h:831:2: note: expanded from macro 'scoped_masked_user_rw_access'
831 | scoped_masked_user_rw_access_size((_uptr), sizeof(*(_uptr)), _elbl)
| ^
include/linux/uaccess.h:819:2: note: expanded from macro 'scoped_masked_user_rw_access_size'
819 | __scoped_masked_user_access(rw, (_uptr), (_size), _elbl)
| ^
include/linux/uaccess.h:751:44: note: expanded from macro '__scoped_masked_user_access'
751 | for (CLASS(masked_user_##_mode##_access, scope) (_tmpptr); !____stop; \
| ^
fs/select.c:780:4: error: cannot jump from this asm goto statement to one of its possible targets
780 | unsafe_get_user(to->p, &from->p, Efault);
| ^
arch/arm64/include/asm/uaccess.h:428:2: note: expanded from macro 'unsafe_get_user'
428 | __raw_get_mem("ldtr", x, uaccess_mask_ptr(ptr), label, U)
| ^
arch/arm64/include/asm/uaccess.h:217:3: note: expanded from macro '__raw_get_mem'
217 | __get_mem_asm(ldr, "%w", __gu_val, (ptr), label, type); \
| ^
arch/arm64/include/asm/uaccess.h:189:2: note: expanded from macro '__get_mem_asm'
189 | asm_goto_output( \
| ^
include/linux/compiler_types.h:513:31: note: expanded from macro 'asm_goto_output'
513 | #define asm_goto_output(x...) asm volatile goto(x)
| ^
fs/select.c:785:1: note: possible target of asm goto statement
785 | Efault:
| ^
fs/select.c:779:3: note: jump exits scope of variable with __attribute__((cleanup))
779 | scoped_masked_user_rw_access(from, Efault) {
| ^
include/linux/uaccess.h:831:2: note: expanded from macro 'scoped_masked_user_rw_access'
831 | scoped_masked_user_rw_access_size((_uptr), sizeof(*(_uptr)), _elbl)
| ^
include/linux/uaccess.h:819:2: note: expanded from macro 'scoped_masked_user_rw_access_size'
819 | __scoped_masked_user_access(rw, (_uptr), (_size), _elbl)
| ^
include/linux/uaccess.h:751:44: note: expanded from macro '__scoped_masked_user_access'
751 | for (CLASS(masked_user_##_mode##_access, scope) (_tmpptr); !____stop; \
| ^
fs/select.c:780:4: error: cannot jump from this asm goto statement to one of its possible targets
780 | unsafe_get_user(to->p, &from->p, Efault);
| ^
arch/arm64/include/asm/uaccess.h:428:2: note: expanded from macro 'unsafe_get_user'
428 | __raw_get_mem("ldtr", x, uaccess_mask_ptr(ptr), label, U)
| ^
arch/arm64/include/asm/uaccess.h:214:3: note: expanded from macro '__raw_get_mem'
214 | __get_mem_asm(ldr "h", "%w", __gu_val, (ptr), label, type); \
| ^
arch/arm64/include/asm/uaccess.h:189:2: note: expanded from macro '__get_mem_asm'
189 | asm_goto_output( \
vim +781 fs/select.c
7e71609f64ec81 Al Viro 2020-02-19 773
7e71609f64ec81 Al Viro 2020-02-19 774 static inline int get_sigset_argpack(struct sigset_argpack *to,
7e71609f64ec81 Al Viro 2020-02-19 775 struct sigset_argpack __user *from)
7e71609f64ec81 Al Viro 2020-02-19 776 {
7e71609f64ec81 Al Viro 2020-02-19 777 // the path is hot enough for overhead of copy_from_user() to matter
7e71609f64ec81 Al Viro 2020-02-19 778 if (from) {
acabe15d70b5c1 Thomas Gleixner 2025-08-13 779 scoped_masked_user_rw_access(from, Efault) {
7e71609f64ec81 Al Viro 2020-02-19 780 unsafe_get_user(to->p, &from->p, Efault);
7e71609f64ec81 Al Viro 2020-02-19 @781 unsafe_get_user(to->size, &from->size, Efault);
acabe15d70b5c1 Thomas Gleixner 2025-08-13 782 }
7e71609f64ec81 Al Viro 2020-02-19 783 }
7e71609f64ec81 Al Viro 2020-02-19 784 return 0;
7e71609f64ec81 Al Viro 2020-02-19 785 Efault:
7e71609f64ec81 Al Viro 2020-02-19 786 return -EFAULT;
7e71609f64ec81 Al Viro 2020-02-19 787 }
7e71609f64ec81 Al Viro 2020-02-19 788
:::::: The code at line 781 was first introduced by commit
:::::: 7e71609f64ec81b8367b7fa59ab06bb571d17e3b pselect6() and friends: take handling the combined 6th/7th args into helper
:::::: TO: Al Viro <viro@zeniv.linux.org.uk>
:::::: CC: Al Viro <viro@zeniv.linux.org.uk>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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