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* [block:for-5.13/io_uring 119/120] fs/io_uring.c:5296:38: sparse: sparse: incorrect type in return expression (different base types)
@ 2021-04-15  2:11 kernel test robot
  0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2021-04-15  2:11 UTC (permalink / raw)
  To: kbuild-all

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-5.13/io_uring
head:   c5de00366e3e675f9e321983d9bd357c1fbea0e9
commit: 9096af3e9c8734a34703bd9fb5ab14292296f911 [119/120] io_uring: add helper for parsing poll events
config: i386-randconfig-s002-20210414 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-280-g2cd6d34e-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?id=9096af3e9c8734a34703bd9fb5ab14292296f911
        git remote add block https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git
        git fetch --no-tags block for-5.13/io_uring
        git checkout 9096af3e9c8734a34703bd9fb5ab14292296f911
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 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 >>)
   fs/io_uring.c:2888:24: sparse: sparse: incorrect type in return expression (different address spaces) @@     expected void [noderef] __user * @@     got struct io_buffer *[assigned] kbuf @@
   fs/io_uring.c:2888:24: sparse:     expected void [noderef] __user *
   fs/io_uring.c:2888:24: sparse:     got struct io_buffer *[assigned] kbuf
   fs/io_uring.c:4189:14: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct file *file @@     got struct file [noderef] __rcu * @@
   fs/io_uring.c:4189:14: sparse:     expected struct file *file
   fs/io_uring.c:4189:14: sparse:     got struct file [noderef] __rcu *
   fs/io_uring.c:4794:72: sparse: sparse: incorrect type in argument 4 (different base types) @@     expected int mask @@     got restricted __poll_t [usertype] mask @@
   fs/io_uring.c:4794:72: sparse:     expected int mask
   fs/io_uring.c:4794:72: sparse:     got restricted __poll_t [usertype] mask
   fs/io_uring.c:4798:21: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned int [usertype] result @@     got restricted __poll_t [usertype] mask @@
   fs/io_uring.c:4798:21: sparse:     expected unsigned int [usertype] result
   fs/io_uring.c:4798:21: sparse:     got restricted __poll_t [usertype] mask
   fs/io_uring.c:4823:29: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned int [usertype] result @@     got restricted __poll_t @@
   fs/io_uring.c:4823:29: sparse:     expected unsigned int [usertype] result
   fs/io_uring.c:4823:29: sparse:     got restricted __poll_t
   fs/io_uring.c:4904:49: sparse: sparse: incorrect type in argument 2 (different base types) @@     expected restricted __poll_t [usertype] mask @@     got unsigned int [usertype] result @@
   fs/io_uring.c:4904:49: sparse:     expected restricted __poll_t [usertype] mask
   fs/io_uring.c:4904:49: sparse:     got unsigned int [usertype] result
   fs/io_uring.c:5053:41: sparse: sparse: incorrect type in argument 4 (different base types) @@     expected int mask @@     got restricted __poll_t [usertype] @@
   fs/io_uring.c:5053:41: sparse:     expected int mask
   fs/io_uring.c:5053:41: sparse:     got restricted __poll_t [usertype]
   fs/io_uring.c:5141:22: sparse: sparse: invalid assignment: |=
   fs/io_uring.c:5141:22: sparse:    left side has type restricted __poll_t
   fs/io_uring.c:5141:22: sparse:    right side has type int
   fs/io_uring.c:5143:22: sparse: sparse: invalid assignment: |=
   fs/io_uring.c:5143:22: sparse:    left side has type restricted __poll_t
   fs/io_uring.c:5143:22: sparse:    right side has type int
   fs/io_uring.c:5148:22: sparse: sparse: invalid assignment: &=
   fs/io_uring.c:5148:22: sparse:    left side has type restricted __poll_t
   fs/io_uring.c:5148:22: sparse:    right side has type int
   fs/io_uring.c:5150:14: sparse: sparse: invalid assignment: |=
   fs/io_uring.c:5150:14: sparse:    left side has type restricted __poll_t
   fs/io_uring.c:5150:14: sparse:    right side has type int
   fs/io_uring.c:5164:67: sparse: sparse: incorrect type in argument 4 (different base types) @@     expected int mask @@     got restricted __poll_t [assigned] [usertype] mask @@
   fs/io_uring.c:5164:67: sparse:     expected int mask
   fs/io_uring.c:5164:67: sparse:     got restricted __poll_t [assigned] [usertype] mask
   fs/io_uring.c:5165:52: sparse: sparse: incorrect type in argument 5 (different base types) @@     expected int events @@     got restricted __poll_t [usertype] events @@
   fs/io_uring.c:5165:52: sparse:     expected int events
   fs/io_uring.c:5165:52: sparse:     got restricted __poll_t [usertype] events
   fs/io_uring.c:5295:24: sparse: sparse: invalid assignment: |=
   fs/io_uring.c:5295:24: sparse:    left side has type unsigned int
   fs/io_uring.c:5295:24: sparse:    right side has type restricted __poll_t
   fs/io_uring.c:5296:65: sparse: sparse: restricted __poll_t degrades to integer
   fs/io_uring.c:5296:29: sparse: sparse: restricted __poll_t degrades to integer
>> fs/io_uring.c:5296:38: sparse: sparse: incorrect type in return expression (different base types) @@     expected restricted __poll_t @@     got unsigned int @@
   fs/io_uring.c:5296:38: sparse:     expected restricted __poll_t
   fs/io_uring.c:5296:38: sparse:     got unsigned int
   fs/io_uring.c:5361:16: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned int [usertype] events @@     got restricted __poll_t @@
   fs/io_uring.c:5361:16: sparse:     expected unsigned int [usertype] events
   fs/io_uring.c:5361:16: sparse:     got restricted __poll_t
   fs/io_uring.c:5367:34: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __poll_t [usertype] events @@     got unsigned int [usertype] events @@
   fs/io_uring.c:5367:34: sparse:     expected restricted __poll_t [usertype] events
   fs/io_uring.c:5367:34: sparse:     got unsigned int [usertype] events
   fs/io_uring.c:5376:30: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __poll_t [usertype] events @@     got unsigned int [usertype] events @@
   fs/io_uring.c:5376:30: sparse:     expected restricted __poll_t [usertype] events
   fs/io_uring.c:5376:30: sparse:     got unsigned int [usertype] events
   fs/io_uring.c:5444:35: sparse: sparse: invalid assignment: &=
   fs/io_uring.c:5444:35: sparse:    left side has type restricted __poll_t
   fs/io_uring.c:5444:35: sparse:    right side has type int
   fs/io_uring.c:5445:54: sparse: sparse: restricted __poll_t degrades to integer
   fs/io_uring.c:5445:35: sparse: sparse: invalid assignment: |=
   fs/io_uring.c:5445:35: sparse:    left side has type restricted __poll_t
   fs/io_uring.c:5445:35: sparse:    right side has type unsigned int
   fs/io_uring.c:7202:9: sparse: sparse: context imbalance in 'io_sq_thread_unpark' - wrong count at exit
   fs/io_uring.c:7213:9: sparse: sparse: context imbalance in 'io_sq_thread_park' - wrong count at exit

vim +5296 fs/io_uring.c

  5284	
  5285	static __poll_t io_poll_parse_events(const struct io_uring_sqe *sqe,
  5286					     unsigned int flags)
  5287	{
  5288		u32 events;
  5289	
  5290		events = READ_ONCE(sqe->poll32_events);
  5291	#ifdef __BIG_ENDIAN
  5292		events = swahw32(events);
  5293	#endif
  5294		if (!(flags & IORING_POLL_ADD_MULTI))
  5295			events |= EPOLLONESHOT;
> 5296		return demangle_poll(events) | (events & (EPOLLEXCLUSIVE|EPOLLONESHOT));
  5297	}
  5298	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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