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charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit Hi Kees, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 6a68cec16b647791d448102376a7eec2820e874f commit: 32e42ab9fc88a884435c27527a433f61c4d2b61b sched/task_stack: Add missing const qualifier to end_of_stack() date: 5 days ago config: loongarch-randconfig-r112-20250801 (https://download.01.org/0day-ci/archive/20250801/202508011029.WGeVHkWa-lkp@intel.com/config) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 8f09b03aebb71c154f3bbe725c29e3f47d37c26e) reproduce: (https://download.01.org/0day-ci/archive/20250801/202508011029.WGeVHkWa-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 | Closes: https://lore.kernel.org/oe-kbuild-all/202508011029.WGeVHkWa-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) >> kernel/kstack_erase.c:34:56: sparse: sparse: incorrect type in argument 3 (different address spaces) @@ expected void * @@ got void [noderef] __user *buffer @@ kernel/kstack_erase.c:34:56: sparse: expected void * kernel/kstack_erase.c:34:56: sparse: got void [noderef] __user *buffer >> kernel/kstack_erase.c:54:35: sparse: sparse: incorrect type in initializer (incompatible argument 3 (different address spaces)) @@ expected int ( [usertype] *proc_handler )( ... ) @@ got int ( * )( ... ) @@ kernel/kstack_erase.c:54:35: sparse: expected int ( [usertype] *proc_handler )( ... ) kernel/kstack_erase.c:54:35: sparse: got int ( * )( ... ) vim +34 kernel/kstack_erase.c 964c9dff009189 kernel/stackleak.c Alexander Popov 2018-08-17 23 0df8bdd5e3b3e5 kernel/stackleak.c Xiaoming Ni 2022-01-21 24 #ifdef CONFIG_SYSCTL 78eb4ea25cd5fd kernel/stackleak.c Joel Granados 2024-07-24 25 static int stack_erasing_sysctl(const struct ctl_table *table, int write, 0df8bdd5e3b3e5 kernel/stackleak.c Xiaoming Ni 2022-01-21 26 void __user *buffer, size_t *lenp, loff_t *ppos) 964c9dff009189 kernel/stackleak.c Alexander Popov 2018-08-17 27 { 964c9dff009189 kernel/stackleak.c Alexander Popov 2018-08-17 28 int ret = 0; 964c9dff009189 kernel/stackleak.c Alexander Popov 2018-08-17 29 int state = !static_branch_unlikely(&stack_erasing_bypass); 964c9dff009189 kernel/stackleak.c Alexander Popov 2018-08-17 30 int prev_state = state; 0e148d3cca0dc1 kernel/stackleak.c Thomas Weißschuh 2024-05-03 31 struct ctl_table table_copy = *table; 964c9dff009189 kernel/stackleak.c Alexander Popov 2018-08-17 32 0e148d3cca0dc1 kernel/stackleak.c Thomas Weißschuh 2024-05-03 33 table_copy.data = &state; 0e148d3cca0dc1 kernel/stackleak.c Thomas Weißschuh 2024-05-03 @34 ret = proc_dointvec_minmax(&table_copy, write, buffer, lenp, ppos); 964c9dff009189 kernel/stackleak.c Alexander Popov 2018-08-17 35 state = !!state; 964c9dff009189 kernel/stackleak.c Alexander Popov 2018-08-17 36 if (ret || !write || state == prev_state) 964c9dff009189 kernel/stackleak.c Alexander Popov 2018-08-17 37 return ret; 964c9dff009189 kernel/stackleak.c Alexander Popov 2018-08-17 38 964c9dff009189 kernel/stackleak.c Alexander Popov 2018-08-17 39 if (state) 964c9dff009189 kernel/stackleak.c Alexander Popov 2018-08-17 40 static_branch_disable(&stack_erasing_bypass); 964c9dff009189 kernel/stackleak.c Alexander Popov 2018-08-17 41 else 964c9dff009189 kernel/stackleak.c Alexander Popov 2018-08-17 42 static_branch_enable(&stack_erasing_bypass); 964c9dff009189 kernel/stackleak.c Alexander Popov 2018-08-17 43 964c9dff009189 kernel/stackleak.c Alexander Popov 2018-08-17 44 pr_warn("stackleak: kernel stack erasing is %s\n", 62e9c1e8ecee87 kernel/stackleak.c Thorsten Blum 2024-12-22 45 str_enabled_disabled(state)); 964c9dff009189 kernel/stackleak.c Alexander Popov 2018-08-17 46 return ret; 964c9dff009189 kernel/stackleak.c Alexander Popov 2018-08-17 47 } 1751f872cc97f9 kernel/stackleak.c Joel Granados 2025-01-28 48 static const struct ctl_table stackleak_sysctls[] = { 0df8bdd5e3b3e5 kernel/stackleak.c Xiaoming Ni 2022-01-21 49 { 0df8bdd5e3b3e5 kernel/stackleak.c Xiaoming Ni 2022-01-21 50 .procname = "stack_erasing", 0df8bdd5e3b3e5 kernel/stackleak.c Xiaoming Ni 2022-01-21 51 .data = NULL, 0df8bdd5e3b3e5 kernel/stackleak.c Xiaoming Ni 2022-01-21 52 .maxlen = sizeof(int), 0df8bdd5e3b3e5 kernel/stackleak.c Xiaoming Ni 2022-01-21 53 .mode = 0600, 0df8bdd5e3b3e5 kernel/stackleak.c Xiaoming Ni 2022-01-21 @54 .proc_handler = stack_erasing_sysctl, 0df8bdd5e3b3e5 kernel/stackleak.c Xiaoming Ni 2022-01-21 55 .extra1 = SYSCTL_ZERO, 0df8bdd5e3b3e5 kernel/stackleak.c Xiaoming Ni 2022-01-21 56 .extra2 = SYSCTL_ONE, 0df8bdd5e3b3e5 kernel/stackleak.c Xiaoming Ni 2022-01-21 57 }, 0df8bdd5e3b3e5 kernel/stackleak.c Xiaoming Ni 2022-01-21 58 }; 0df8bdd5e3b3e5 kernel/stackleak.c Xiaoming Ni 2022-01-21 59 :::::: The code at line 34 was first introduced by commit :::::: 0e148d3cca0dc1a7c6063939f6cb9ba4866c39a7 stackleak: Use a copy of the ctl_table argument :::::: TO: Thomas Weißschuh :::::: CC: Kees Cook -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki