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Message-ID: <202208172048.fQ9UABUn-lkp@intel.com>
Date: Wed, 17 Aug 2022 21:00:45 +0800
From: kernel test robot <lkp@...el.com>
To: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [kas:lam 5/13] drivers/char/ipmi/ipmi_watchdog.c:768:37: sparse:
sparse: incorrect type in assignment (different address spaces)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git lam
head: 8836fbd6cd3120383a0bc63cd54c7dd55639ed49
commit: 2600a472582e2968633831d430c2a1366ad3e8b1 [5/13] x86/uaccess: Provide untagged_addr() and remove tags before address check
config: x86_64-randconfig-s021-20220815
compiler: gcc-11 (Debian 11.3.0-5) 11.3.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.4-39-gce1a6720-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git/commit/?id=2600a472582e2968633831d430c2a1366ad3e8b1
git remote add kas https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git
git fetch --no-tags kas lam
git checkout 2600a472582e2968633831d430c2a1366ad3e8b1
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>
sparse warnings: (new ones prefixed by >>)
>> drivers/char/ipmi/ipmi_watchdog.c:768:37: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected char const [noderef] __user *__ptr_clean @@ got char const * @@
drivers/char/ipmi/ipmi_watchdog.c:768:37: sparse: expected char const [noderef] __user *__ptr_clean
drivers/char/ipmi/ipmi_watchdog.c:768:37: sparse: got char const *
--
>> drivers/input/serio/serport.c:216:21: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected unsigned long [noderef] __user *__ptr_clean @@ got unsigned long * @@
drivers/input/serio/serport.c:216:21: sparse: expected unsigned long [noderef] __user *__ptr_clean
drivers/input/serio/serport.c:216:21: sparse: got unsigned long *
vim +768 drivers/char/ipmi/ipmi_watchdog.c
55929332c92e5d Arnd Bergmann 2010-04-27 750
^1da177e4c3f41 Linus Torvalds 2005-04-16 751 static ssize_t ipmi_write(struct file *file,
^1da177e4c3f41 Linus Torvalds 2005-04-16 752 const char __user *buf,
^1da177e4c3f41 Linus Torvalds 2005-04-16 753 size_t len,
^1da177e4c3f41 Linus Torvalds 2005-04-16 754 loff_t *ppos)
^1da177e4c3f41 Linus Torvalds 2005-04-16 755 {
^1da177e4c3f41 Linus Torvalds 2005-04-16 756 int rv;
^1da177e4c3f41 Linus Torvalds 2005-04-16 757
^1da177e4c3f41 Linus Torvalds 2005-04-16 758 if (len) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 759 if (!nowayout) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 760 size_t i;
^1da177e4c3f41 Linus Torvalds 2005-04-16 761
^1da177e4c3f41 Linus Torvalds 2005-04-16 762 /* In case it was set long ago */
^1da177e4c3f41 Linus Torvalds 2005-04-16 763 expect_close = 0;
^1da177e4c3f41 Linus Torvalds 2005-04-16 764
^1da177e4c3f41 Linus Torvalds 2005-04-16 765 for (i = 0; i != len; i++) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 766 char c;
^1da177e4c3f41 Linus Torvalds 2005-04-16 767
^1da177e4c3f41 Linus Torvalds 2005-04-16 @768 if (get_user(c, buf + i))
^1da177e4c3f41 Linus Torvalds 2005-04-16 769 return -EFAULT;
^1da177e4c3f41 Linus Torvalds 2005-04-16 770 if (c == 'V')
^1da177e4c3f41 Linus Torvalds 2005-04-16 771 expect_close = 42;
^1da177e4c3f41 Linus Torvalds 2005-04-16 772 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 773 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 774 rv = ipmi_heartbeat();
^1da177e4c3f41 Linus Torvalds 2005-04-16 775 if (rv)
^1da177e4c3f41 Linus Torvalds 2005-04-16 776 return rv;
^1da177e4c3f41 Linus Torvalds 2005-04-16 777 }
3976df9b04c113 Mark Rustad 2008-07-10 778 return len;
^1da177e4c3f41 Linus Torvalds 2005-04-16 779 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 780
:::::: The code at line 768 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2
:::::: TO: Linus Torvalds <torvalds@...970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@...970.osdl.org>
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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