Messages in this thread | | | Date | Sat, 16 Jul 2022 05:25:10 +0800 | From | kernel test robot <> | Subject | kernel/trace/trace_events_user.c:811:13: sparse: sparse: cast removes address space '__user' of expression |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 9b59ec8d50a1f28747ceff9a4f39af5deba9540e commit: 7f5a08c79df35e68f1a43033450c5050f12bc155 user_events: Add minimal support for trace_event into ftrace date: 5 months ago config: sparc64-randconfig-s031-20220716 (https://download.01.org/0day-ci/archive/20220716/202207160536.yQsO3FQC-lkp@intel.com/config) compiler: sparc64-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=7f5a08c79df35e68f1a43033450c5050f12bc155 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 7f5a08c79df35e68f1a43033450c5050f12bc155 # 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=sparc64 SHELL=/bin/bash drivers/usb/gadget/function/ drivers/virtio/ kernel/trace/
If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@intel.com>
sparse warnings: (new ones prefixed by >>) kernel/trace/trace_events_user.c:747:16: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/trace/trace_events_user.c:747:16: sparse: void [noderef] __rcu * kernel/trace/trace_events_user.c:747:16: sparse: void * >> kernel/trace/trace_events_user.c:811:13: sparse: sparse: cast removes address space '__user' of expression >> kernel/trace/trace_events_user.c:811:13: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] __user *buf @@ got char * @@ kernel/trace/trace_events_user.c:811:13: sparse: expected void [noderef] __user *buf kernel/trace/trace_events_user.c:811:13: sparse: got char * kernel/trace/trace_events_user.c:827:16: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/trace/trace_events_user.c:827:16: sparse: void [noderef] __rcu * kernel/trace/trace_events_user.c:827:16: sparse: void * kernel/trace/trace_events_user.c:854:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/trace/trace_events_user.c:854:9: sparse: void [noderef] __rcu * kernel/trace/trace_events_user.c:854:9: sparse: void *
vim +/__user +811 kernel/trace/trace_events_user.c
801 802 static ssize_t user_events_write(struct file *file, const char __user *ubuf, 803 size_t count, loff_t *ppos) 804 { 805 struct iovec iov; 806 struct iov_iter i; 807 808 if (unlikely(*ppos != 0)) 809 return -EFAULT; 810 > 811 if (unlikely(import_single_range(READ, (char *)ubuf, count, &iov, &i))) 812 return -EFAULT; 813 814 return user_events_write_core(file, &i); 815 } 816
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