Messages in this thread | | | Date | Mon, 11 Oct 2021 17:18:47 +0800 | From | kernel test robot <> | Subject | [tglx-devel:x86/fpu 62/77] arch/x86/kernel/fpu/xstate.c:1311:9: sparse: sparse: dereference of noderef expression |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git x86/fpu head: a365ccb2764d58791ee5946b16fa0ffceb17021f commit: 1220c1c84393869a348163238581fef56cf60a84 [62/77] x86/arch_prctl: Add controls for dynamic XSTATE components config: x86_64-randconfig-s021-20211011 (attached as .config) 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/tglx/devel.git/commit/?id=1220c1c84393869a348163238581fef56cf60a84 git remote add tglx-devel https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git git fetch --no-tags tglx-devel x86/fpu git checkout 1220c1c84393869a348163238581fef56cf60a84 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kernel/fpu/
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
sparse warnings: (new ones prefixed by >>) arch/x86/kernel/fpu/xstate.c:1424:39: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@ arch/x86/kernel/fpu/xstate.c:1424:39: sparse: expected struct spinlock [usertype] *lock arch/x86/kernel/fpu/xstate.c:1424:39: sparse: got struct spinlock [noderef] __rcu * arch/x86/kernel/fpu/xstate.c:1427:41: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@ arch/x86/kernel/fpu/xstate.c:1427:41: sparse: expected struct spinlock [usertype] *lock arch/x86/kernel/fpu/xstate.c:1427:41: sparse: got struct spinlock [noderef] __rcu * >> arch/x86/kernel/fpu/xstate.c:1311:9: sparse: sparse: dereference of noderef expression
vim +1311 arch/x86/kernel/fpu/xstate.c
1304 1305 #ifdef CONFIG_DYNAMIC_SIGALTSTACK 1306 static int validate_sigaltstack(unsigned int usize) 1307 { 1308 struct task_struct *thread, *leader = current->group_leader; 1309 unsigned long framesize = get_sigframe_size(); 1310 > 1311 assert_spin_locked(¤t->sighand->siglock); 1312 1313 framesize += usize - fpu_user_cfg.default_size; 1314 for_each_thread(leader, thread) { 1315 if (thread->sas_ss_size && thread->sas_ss_size < framesize) 1316 return -ENOSPC; 1317 } 1318 return 0; 1319 } 1320
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