tree: https://git.kernel.org/pub/scm/linux/kernel/git/melver/linux.git review/uaccess-logging head: b0aa74824d0cd2fca9a45f5328b355949217f721 commit: 8ebb2cf0597b5485d0e3aa745fb79d9495ac9b97 [4/6] uaccess-buffer: add CONFIG_GENERIC_ENTRY support config: i386-randconfig-s031-20211207 (https://download.01.org/0day-ci/archive/20211210/202112100515.6IGZbs7H-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/melver/linux.git/commit/?... git remote add melver https://git.kernel.org/pub/scm/linux/kernel/git/melver/linux.git git fetch --no-tags melver review/uaccess-logging git checkout 8ebb2cf0597b5485d0e3aa745fb79d9495ac9b97 # save the config file to linux build tree mkdir build_dir make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) kernel/uaccess-buffer.c:62:31: sparse: expected struct spinlock [usertype] *lock kernel/uaccess-buffer.c:62:31: sparse: got struct spinlock [noderef] __rcu * kernel/uaccess-buffer.c:65:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@ kernel/uaccess-buffer.c:65:33: sparse: expected struct spinlock [usertype] *lock kernel/uaccess-buffer.c:65:33: sparse: got struct spinlock [noderef] __rcu * vim +62 kernel/uaccess-buffer.c b3442207580a7a Peter Collingbourne 2021-12-07 59 b3442207580a7a Peter Collingbourne 2021-12-07 60 void __uaccess_buffer_post_exit_loop(void) b3442207580a7a Peter Collingbourne 2021-12-07 61 { b3442207580a7a Peter Collingbourne 2021-12-07 @62 spin_lock_irq(&current->sighand->siglock); b3442207580a7a Peter Collingbourne 2021-12-07 63 current->blocked = current->real_blocked; b3442207580a7a Peter Collingbourne 2021-12-07 64 recalc_sigpending(); b3442207580a7a Peter Collingbourne 2021-12-07 65 spin_unlock_irq(&current->sighand->siglock); b3442207580a7a Peter Collingbourne 2021-12-07 66 } b3442207580a7a Peter Collingbourne 2021-12-07 67 b3442207580a7a Peter Collingbourne 2021-12-07 68 void uaccess_buffer_free(struct task_struct *tsk) b3442207580a7a Peter Collingbourne 2021-12-07 69 { b3442207580a7a Peter Collingbourne 2021-12-07 70 struct uaccess_buffer_info *buf = &tsk->uaccess_buffer; b3442207580a7a Peter Collingbourne 2021-12-07 71 b3442207580a7a Peter Collingbourne 2021-12-07 72 kfree(buf->kbegin); b3442207580a7a Peter Collingbourne 2021-12-07 73 clear_syscall_work(UACCESS_BUFFER_EXIT); b3442207580a7a Peter Collingbourne 2021-12-07 74 buf->kbegin = buf->kcur = buf->kend = NULL; b3442207580a7a Peter Collingbourne 2021-12-07 75 } b3442207580a7a Peter Collingbourne 2021-12-07 76 b3442207580a7a Peter Collingbourne 2021-12-07 77 void __uaccess_buffer_syscall_entry(void) b3442207580a7a Peter Collingbourne 2021-12-07 78 { b3442207580a7a Peter Collingbourne 2021-12-07 79 struct uaccess_buffer_info *buf = &current->uaccess_buffer; b3442207580a7a Peter Collingbourne 2021-12-07 80 struct uaccess_descriptor desc; b3442207580a7a Peter Collingbourne 2021-12-07 81 b3442207580a7a Peter Collingbourne 2021-12-07 82 if (get_user(buf->desc_ptr, buf->desc_ptr_ptr) || !buf->desc_ptr || b3442207580a7a Peter Collingbourne 2021-12-07 @83 put_user(0, buf->desc_ptr_ptr) || b3442207580a7a Peter Collingbourne 2021-12-07 84 copy_from_user(&desc, buf->desc_ptr, sizeof(desc))) b3442207580a7a Peter Collingbourne 2021-12-07 85 return; b3442207580a7a Peter Collingbourne 2021-12-07 86 b3442207580a7a Peter Collingbourne 2021-12-07 87 if (desc.size > 1024) b3442207580a7a Peter Collingbourne 2021-12-07 88 desc.size = 1024; b3442207580a7a Peter Collingbourne 2021-12-07 89 b3442207580a7a Peter Collingbourne 2021-12-07 90 if (buf->kend - buf->kbegin != desc.size) b3442207580a7a Peter Collingbourne 2021-12-07 91 buf->kbegin = b3442207580a7a Peter Collingbourne 2021-12-07 92 krealloc_array(buf->kbegin, desc.size, b3442207580a7a Peter Collingbourne 2021-12-07 93 sizeof(struct uaccess_buffer_entry), b3442207580a7a Peter Collingbourne 2021-12-07 94 GFP_KERNEL); b3442207580a7a Peter Collingbourne 2021-12-07 95 if (!buf->kbegin) b3442207580a7a Peter Collingbourne 2021-12-07 96 return; b3442207580a7a Peter Collingbourne 2021-12-07 97 b3442207580a7a Peter Collingbourne 2021-12-07 98 set_syscall_work(UACCESS_BUFFER_EXIT); b3442207580a7a Peter Collingbourne 2021-12-07 99 buf->kcur = buf->kbegin; b3442207580a7a Peter Collingbourne 2021-12-07 100 buf->kend = buf->kbegin + desc.size; b3442207580a7a Peter Collingbourne 2021-12-07 101 buf->ubegin = b3442207580a7a Peter Collingbourne 2021-12-07 102 (struct uaccess_buffer_entry __user *)(unsigned long)desc.addr; b3442207580a7a Peter Collingbourne 2021-12-07 103 } b3442207580a7a Peter Collingbourne 2021-12-07 104 :::::: The code at line 62 was first introduced by commit :::::: b3442207580a7ad112ed80ebff4f516282979c3b uaccess-buffer: add core code :::::: TO: Peter Collingbourne <pcc(a)google.com&gt; :::::: CC: Marco Elver <elver(a)google.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org