Messages in this thread | | | Date | Thu, 18 Nov 2021 03:30:15 +0800 | From | kernel test robot <> | Subject | arch/x86/kernel/signal.c:936:9: sparse: sparse: incorrect type in argument 1 (different address spaces) |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: ee1703cda8dc777e937dec172da55beaf1a74919 commit: 3aac3ebea08f2d342364f827c8979ab0e1dd591e x86/signal: Implement sigaltstack size validation date: 3 weeks ago config: i386-randconfig-s001-20211109 (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/torvalds/linux.git/commit/?id=3aac3ebea08f2d342364f827c8979ab0e1dd591e git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 3aac3ebea08f2d342364f827c8979ab0e1dd591e # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386
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/signal.c:358:9: sparse: sparse: cast removes address space '__user' of expression arch/x86/kernel/signal.c:358:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got unsigned long long [usertype] * @@ arch/x86/kernel/signal.c:358:9: sparse: expected void const volatile [noderef] __user *ptr arch/x86/kernel/signal.c:358:9: sparse: got unsigned long long [usertype] * arch/x86/kernel/signal.c:358:9: sparse: sparse: cast removes address space '__user' of expression arch/x86/kernel/signal.c:358:9: sparse: sparse: cast removes address space '__user' of expression arch/x86/kernel/signal.c:358:9: sparse: sparse: cast removes address space '__user' of expression arch/x86/kernel/signal.c:358:9: sparse: sparse: cast removes address space '__user' of expression arch/x86/kernel/signal.c:358:9: sparse: sparse: cast removes address space '__user' of expression arch/x86/kernel/signal.c:358:9: sparse: sparse: cast removes address space '__user' of expression arch/x86/kernel/signal.c:358:9: sparse: sparse: cast removes address space '__user' of expression arch/x86/kernel/signal.c:358:9: sparse: sparse: cast removes address space '__user' of expression arch/x86/kernel/signal.c:358:9: sparse: sparse: cast removes address space '__user' of expression arch/x86/kernel/signal.c:418:9: sparse: sparse: cast removes address space '__user' of expression arch/x86/kernel/signal.c:418:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got unsigned long long [usertype] * @@ arch/x86/kernel/signal.c:418:9: sparse: expected void const volatile [noderef] __user *ptr arch/x86/kernel/signal.c:418:9: sparse: got unsigned long long [usertype] * arch/x86/kernel/signal.c:418:9: sparse: sparse: cast removes address space '__user' of expression arch/x86/kernel/signal.c:418:9: sparse: sparse: cast removes address space '__user' of expression arch/x86/kernel/signal.c:418:9: sparse: sparse: cast removes address space '__user' of expression arch/x86/kernel/signal.c:418:9: sparse: sparse: cast removes address space '__user' of expression arch/x86/kernel/signal.c:418:9: sparse: sparse: cast removes address space '__user' of expression arch/x86/kernel/signal.c:418:9: sparse: sparse: cast removes address space '__user' of expression arch/x86/kernel/signal.c:418:9: sparse: sparse: cast removes address space '__user' of expression arch/x86/kernel/signal.c:418:9: sparse: sparse: cast removes address space '__user' of expression arch/x86/kernel/signal.c:418:9: sparse: sparse: cast removes address space '__user' of expression >> arch/x86/kernel/signal.c:936:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct lockdep_map const *lock @@ got struct lockdep_map [noderef] __rcu * @@ arch/x86/kernel/signal.c:936:9: sparse: expected struct lockdep_map const *lock arch/x86/kernel/signal.c:936:9: sparse: got struct lockdep_map [noderef] __rcu *
vim +936 arch/x86/kernel/signal.c
924 925 /* 926 * MINSIGSTKSZ is 2048 and can't be changed despite the fact that AVX512 927 * exceeds that size already. As such programs might never use the 928 * sigaltstack they just continued to work. While always checking against 929 * the real size would be correct, this might be considered a regression. 930 * 931 * Therefore avoid the sanity check, unless enforced by kernel config or 932 * command line option. 933 */ 934 bool sigaltstack_size_valid(size_t ss_size) 935 { > 936 lockdep_assert_held(¤t->sighand->siglock); 937 938 if (strict_sigaltstack_size) 939 return ss_size > get_sigframe_size(); 940 941 return true; 942 } 943 #endif /* CONFIG_DYNAMIC_SIGFRAME */ 944
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