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charset=us-ascii Content-Disposition: inline X-Rspamd-Queue-Id: 64EBD180004 X-Stat-Signature: hkhcxgja9ud1x4btfx86fgsc8mdqdgww X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1679429881-839923 X-HE-Meta: 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 nNRXtuvU 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 2faac9a98f010cf5b342fa89ac489c4586364e6e commit: 0df8bdd5e3b3e557ce2c2575fce0c64c5dd1045a stackleak: move stack_erasing sysctl to stackleak.c date: 1 year, 2 months ago config: arm64-randconfig-s032-20230321 (https://download.01.org/0day-ci/archive/20230322/202303220449.l6Q32ILq-lkp@intel.com/config) compiler: aarch64-linux-gcc (GCC) 12.1.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.4-39-gce1a6720-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0df8bdd5e3b3e557ce2c2575fce0c64c5dd1045a git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 0df8bdd5e3b3e557ce2c2575fce0c64c5dd1045a # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm64 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm64 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot | Link: https://lore.kernel.org/oe-kbuild-all/202303220449.l6Q32ILq-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) >> kernel/stackleak.c:33:50: sparse: sparse: incorrect type in argument 3 (different address spaces) @@ expected void * @@ got void [noderef] __user *buffer @@ kernel/stackleak.c:33:50: sparse: expected void * kernel/stackleak.c:33:50: sparse: got void [noderef] __user *buffer >> kernel/stackleak.c:53:35: sparse: sparse: incorrect type in initializer (incompatible argument 3 (different address spaces)) @@ expected int ( [usertype] *proc_handler )( ... ) @@ got int ( * )( ... ) @@ kernel/stackleak.c:53:35: sparse: expected int ( [usertype] *proc_handler )( ... ) kernel/stackleak.c:53:35: sparse: got int ( * )( ... ) vim +33 kernel/stackleak.c 964c9dff0091893 Alexander Popov 2018-08-17 22 0df8bdd5e3b3e55 Xiaoming Ni 2022-01-21 23 #ifdef CONFIG_SYSCTL 0df8bdd5e3b3e55 Xiaoming Ni 2022-01-21 24 static int stack_erasing_sysctl(struct ctl_table *table, int write, 0df8bdd5e3b3e55 Xiaoming Ni 2022-01-21 25 void __user *buffer, size_t *lenp, loff_t *ppos) 964c9dff0091893 Alexander Popov 2018-08-17 26 { 964c9dff0091893 Alexander Popov 2018-08-17 27 int ret = 0; 964c9dff0091893 Alexander Popov 2018-08-17 28 int state = !static_branch_unlikely(&stack_erasing_bypass); 964c9dff0091893 Alexander Popov 2018-08-17 29 int prev_state = state; 964c9dff0091893 Alexander Popov 2018-08-17 30 964c9dff0091893 Alexander Popov 2018-08-17 31 table->data = &state; 964c9dff0091893 Alexander Popov 2018-08-17 32 table->maxlen = sizeof(int); 964c9dff0091893 Alexander Popov 2018-08-17 @33 ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); 964c9dff0091893 Alexander Popov 2018-08-17 34 state = !!state; 964c9dff0091893 Alexander Popov 2018-08-17 35 if (ret || !write || state == prev_state) 964c9dff0091893 Alexander Popov 2018-08-17 36 return ret; 964c9dff0091893 Alexander Popov 2018-08-17 37 964c9dff0091893 Alexander Popov 2018-08-17 38 if (state) 964c9dff0091893 Alexander Popov 2018-08-17 39 static_branch_disable(&stack_erasing_bypass); 964c9dff0091893 Alexander Popov 2018-08-17 40 else 964c9dff0091893 Alexander Popov 2018-08-17 41 static_branch_enable(&stack_erasing_bypass); 964c9dff0091893 Alexander Popov 2018-08-17 42 964c9dff0091893 Alexander Popov 2018-08-17 43 pr_warn("stackleak: kernel stack erasing is %s\n", 964c9dff0091893 Alexander Popov 2018-08-17 44 state ? "enabled" : "disabled"); 964c9dff0091893 Alexander Popov 2018-08-17 45 return ret; 964c9dff0091893 Alexander Popov 2018-08-17 46 } 0df8bdd5e3b3e55 Xiaoming Ni 2022-01-21 47 static struct ctl_table stackleak_sysctls[] = { 0df8bdd5e3b3e55 Xiaoming Ni 2022-01-21 48 { 0df8bdd5e3b3e55 Xiaoming Ni 2022-01-21 49 .procname = "stack_erasing", 0df8bdd5e3b3e55 Xiaoming Ni 2022-01-21 50 .data = NULL, 0df8bdd5e3b3e55 Xiaoming Ni 2022-01-21 51 .maxlen = sizeof(int), 0df8bdd5e3b3e55 Xiaoming Ni 2022-01-21 52 .mode = 0600, 0df8bdd5e3b3e55 Xiaoming Ni 2022-01-21 @53 .proc_handler = stack_erasing_sysctl, 0df8bdd5e3b3e55 Xiaoming Ni 2022-01-21 54 .extra1 = SYSCTL_ZERO, 0df8bdd5e3b3e55 Xiaoming Ni 2022-01-21 55 .extra2 = SYSCTL_ONE, 0df8bdd5e3b3e55 Xiaoming Ni 2022-01-21 56 }, 0df8bdd5e3b3e55 Xiaoming Ni 2022-01-21 57 {} 0df8bdd5e3b3e55 Xiaoming Ni 2022-01-21 58 }; 0df8bdd5e3b3e55 Xiaoming Ni 2022-01-21 59 :::::: The code at line 33 was first introduced by commit :::::: 964c9dff0091893a9a74a88edf984c6da0b779f7 stackleak: Allow runtime disabling of kernel stack erasing :::::: TO: Alexander Popov :::::: CC: Kees Cook -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests