* [tglx-devel:uaccess/masked 9/11] kernel/futex/futex.h:292:3: error: cannot jump from this asm goto statement to one of its possible targets
@ 2025-10-16 0:14 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2025-10-16 0:14 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: f6ac10db12b5fa73d73089af300ac80c45255fd2 [9/11] futex: Convert to scoped masked user access
config: arm64-randconfig-001-20251016 (https://download.01.org/0day-ci/archive/20251016/202510160811.WXvO1laX-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/20251016/202510160811.WXvO1laX-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/202510160811.WXvO1laX-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from kernel/futex/pi.c:7:
>> kernel/futex/futex.h:292:3: error: cannot jump from this asm goto statement to one of its possible targets
292 | unsafe_get_user(*dest, from, 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)
| ^
kernel/futex/futex.h:294:1: note: possible target of asm goto statement
294 | efault:
| ^
kernel/futex/futex.h:291:2: note: jump exits scope of variable with __attribute__((cleanup))
291 | scoped_masked_user_read_access(from, efault)
| ^
include/linux/uaccess.h:778:2: note: expanded from macro 'scoped_masked_user_read_access'
778 | scoped_masked_user_read_access_size((_usrc), sizeof(*(_usrc)), _elbl)
| ^
include/linux/uaccess.h:766:2: note: expanded from macro 'scoped_masked_user_read_access_size'
766 | __scoped_masked_user_access(read, (_usrc), (_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; \
| ^
In file included from kernel/futex/pi.c:7:
>> kernel/futex/futex.h:292:3: error: cannot jump from this asm goto statement to one of its possible targets
292 | unsafe_get_user(*dest, from, 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)
| ^
kernel/futex/futex.h:294:1: note: possible target of asm goto statement
294 | efault:
| ^
kernel/futex/futex.h:291:2: note: jump exits scope of variable with __attribute__((cleanup))
291 | scoped_masked_user_read_access(from, efault)
| ^
include/linux/uaccess.h:778:2: note: expanded from macro 'scoped_masked_user_read_access'
778 | scoped_masked_user_read_access_size((_usrc), sizeof(*(_usrc)), _elbl)
| ^
include/linux/uaccess.h:766:2: note: expanded from macro 'scoped_masked_user_read_access_size'
766 | __scoped_masked_user_access(read, (_usrc), (_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; \
| ^
In file included from kernel/futex/pi.c:7:
>> kernel/futex/futex.h:292:3: error: cannot jump from this asm goto statement to one of its possible targets
292 | unsafe_get_user(*dest, from, 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)
| ^
kernel/futex/futex.h:294:1: note: possible target of asm goto statement
294 | efault:
| ^
kernel/futex/futex.h:291:2: note: jump exits scope of variable with __attribute__((cleanup))
291 | scoped_masked_user_read_access(from, efault)
| ^
include/linux/uaccess.h:778:2: note: expanded from macro 'scoped_masked_user_read_access'
778 | scoped_masked_user_read_access_size((_usrc), sizeof(*(_usrc)), _elbl)
| ^
include/linux/uaccess.h:766:2: note: expanded from macro 'scoped_masked_user_read_access_size'
766 | __scoped_masked_user_access(read, (_usrc), (_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; \
| ^
In file included from kernel/futex/pi.c:7:
>> kernel/futex/futex.h:292:3: error: cannot jump from this asm goto statement to one of its possible targets
292 | unsafe_get_user(*dest, from, 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)
| ^
kernel/futex/futex.h:294:1: note: possible target of asm goto statement
294 | efault:
| ^
kernel/futex/futex.h:291:2: note: jump exits scope of variable with __attribute__((cleanup))
291 | scoped_masked_user_read_access(from, efault)
| ^
include/linux/uaccess.h:778:2: note: expanded from macro 'scoped_masked_user_read_access'
778 | scoped_masked_user_read_access_size((_usrc), sizeof(*(_usrc)), _elbl)
| ^
include/linux/uaccess.h:766:2: note: expanded from macro 'scoped_masked_user_read_access_size'
766 | __scoped_masked_user_access(read, (_usrc), (_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; \
| ^
In file included from kernel/futex/pi.c:7:
kernel/futex/futex.h:301:3: error: cannot jump from this asm goto statement to one of its possible targets
301 | unsafe_put_user(val, to, efault);
| ^
arch/arm64/include/asm/uaccess.h:426:2: note: expanded from macro 'unsafe_put_user'
426 | __raw_put_mem("sttr", x, uaccess_mask_ptr(ptr), label, U)
| ^
arch/arm64/include/asm/uaccess.h:318:3: note: expanded from macro '__raw_put_mem'
318 | __put_mem_asm(str, "%x", __pu_val, (ptr), label, type); \
| ^
arch/arm64/include/asm/uaccess.h:298:2: note: expanded from macro '__put_mem_asm'
298 | asm goto( \
| ^
kernel/futex/futex.h:303:1: note: possible target of asm goto statement
303 | efault:
| ^
kernel/futex/futex.h:300:2: note: jump exits scope of variable with __attribute__((cleanup))
300 | scoped_masked_user_write_access(to, efault)
| ^
include/linux/uaccess.h:808:2: note: expanded from macro 'scoped_masked_user_write_access'
808 | scoped_masked_user_write_access_size((_udst), sizeof(*(_udst)), _elbl)
| ^
include/linux/uaccess.h:796:2: note: expanded from macro 'scoped_masked_user_write_access_size'
796 | __scoped_masked_user_access(write, (_udst), (_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; \
| ^
In file included from kernel/futex/pi.c:7:
kernel/futex/futex.h:301:3: error: cannot jump from this asm goto statement to one of its possible targets
301 | unsafe_put_user(val, to, efault);
| ^
arch/arm64/include/asm/uaccess.h:426:2: note: expanded from macro 'unsafe_put_user'
426 | __raw_put_mem("sttr", x, uaccess_mask_ptr(ptr), label, U)
| ^
arch/arm64/include/asm/uaccess.h:315:3: note: expanded from macro '__raw_put_mem'
315 | __put_mem_asm(str, "%w", __pu_val, (ptr), label, type); \
| ^
arch/arm64/include/asm/uaccess.h:298:2: note: expanded from macro '__put_mem_asm'
298 | asm goto( \
| ^
kernel/futex/futex.h:303:1: note: possible target of asm goto statement
303 | efault:
| ^
kernel/futex/futex.h:300:2: note: jump exits scope of variable with __attribute__((cleanup))
300 | scoped_masked_user_write_access(to, efault)
| ^
include/linux/uaccess.h:808:2: note: expanded from macro 'scoped_masked_user_write_access'
808 | scoped_masked_user_write_access_size((_udst), sizeof(*(_udst)), _elbl)
| ^
include/linux/uaccess.h:796:2: note: expanded from macro 'scoped_masked_user_write_access_size'
796 | __scoped_masked_user_access(write, (_udst), (_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; \
| ^
In file included from kernel/futex/pi.c:7:
kernel/futex/futex.h:301:3: error: cannot jump from this asm goto statement to one of its possible targets
301 | unsafe_put_user(val, to, efault);
| ^
arch/arm64/include/asm/uaccess.h:426:2: note: expanded from macro 'unsafe_put_user'
426 | __raw_put_mem("sttr", x, uaccess_mask_ptr(ptr), label, U)
| ^
arch/arm64/include/asm/uaccess.h:312:3: note: expanded from macro '__raw_put_mem'
312 | __put_mem_asm(str "h", "%w", __pu_val, (ptr), label, type); \
| ^
arch/arm64/include/asm/uaccess.h:298:2: note: expanded from macro '__put_mem_asm'
298 | asm goto( \
| ^
kernel/futex/futex.h:303:1: note: possible target of asm goto statement
303 | efault:
vim +292 kernel/futex/futex.h
283
284 /*
285 * This does a plain atomic user space read, and the user pointer has
286 * already been verified earlier by get_futex_key() to be both aligned
287 * and actually in user space, just like futex_atomic_cmpxchg_inatomic().
288 */
289 static __always_inline int futex_get_value(u32 *dest, u32 __user *from)
290 {
291 scoped_masked_user_read_access(from, efault)
> 292 unsafe_get_user(*dest, from, efault);
293 return 0;
294 efault:
295 return -EFAULT;
296 }
297
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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