From: kernel test robot <lkp@intel.com>
To: "Thomas Weißschuh " <linux@weissschuh.net>
Cc: oe-kbuild-all@lists.linux.dev, Michal Simek <monstr@monstr.eu>,
David Gow <david@davidgow.net>
Subject: [linux-next:master 5037/8910] drivers/scsi/megaraid.c:3523:29: sparse: sparse: Using plain integer as NULL pointer
Date: Wed, 23 Sep 2026 11:10:48 +0800 [thread overview]
Message-ID: <202609231106.jUL3t8MA-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: a8c591ed6b672915e0be57843f943a2a723aff40
commit: 54c35131e628e1a18f02365495a24a73a1fb515e [5037/8910] microblaze: uaccess: Zero out destination on failed get_user()
config: microblaze-randconfig-r1302-20260923 (https://download.01.org/0day-ci/archive/20260923/202609231106.jUL3t8MA-lkp@intel.com/config)
compiler: microblaze-linux-gcc (GCC) 13.4.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260923/202609231106.jUL3t8MA-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202609231106.jUL3t8MA-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
>> drivers/scsi/megaraid.c:3523:29: sparse: sparse: Using plain integer as NULL pointer
drivers/scsi/megaraid.c:3540:29: sparse: sparse: Using plain integer as NULL pointer
drivers/scsi/megaraid.c:4464:26: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void volatile [noderef] __iomem *addr @@ got void * @@
drivers/scsi/megaraid.c:4464:26: sparse: expected void volatile [noderef] __iomem *addr
drivers/scsi/megaraid.c:4464:26: sparse: got void *
drivers/scsi/megaraid.c:4523:26: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void volatile [noderef] __iomem *addr @@ got void * @@
drivers/scsi/megaraid.c:4523:26: sparse: expected void volatile [noderef] __iomem *addr
drivers/scsi/megaraid.c:4523:26: sparse: got void *
vim +3523 drivers/scsi/megaraid.c
^1da177e4c3f415 Linus Torvalds 2005-04-16 3488
^1da177e4c3f415 Linus Torvalds 2005-04-16 3489 /*
^1da177e4c3f415 Linus Torvalds 2005-04-16 3490 * mega_n_to_m()
2b46e5c14218c73 Damien Le Moal 2020-07-06 3491 * @arg: user address
2b46e5c14218c73 Damien Le Moal 2020-07-06 3492 * @mc: mailbox command
^1da177e4c3f415 Linus Torvalds 2005-04-16 3493 *
^1da177e4c3f415 Linus Torvalds 2005-04-16 3494 * Updates the status information to the application, depending on application
^1da177e4c3f415 Linus Torvalds 2005-04-16 3495 * conforms to older mimd ioctl interface or newer NIT ioctl interface
^1da177e4c3f415 Linus Torvalds 2005-04-16 3496 */
^1da177e4c3f415 Linus Torvalds 2005-04-16 3497 static int
^1da177e4c3f415 Linus Torvalds 2005-04-16 3498 mega_n_to_m(void __user *arg, megacmd_t *mc)
^1da177e4c3f415 Linus Torvalds 2005-04-16 3499 {
^1da177e4c3f415 Linus Torvalds 2005-04-16 3500 nitioctl_t __user *uiocp;
^1da177e4c3f415 Linus Torvalds 2005-04-16 3501 megacmd_t __user *umc;
^1da177e4c3f415 Linus Torvalds 2005-04-16 3502 mega_passthru __user *upthru;
^1da177e4c3f415 Linus Torvalds 2005-04-16 3503 struct uioctl_t __user *uioc_mimd;
^1da177e4c3f415 Linus Torvalds 2005-04-16 3504 char signature[8] = {0};
^1da177e4c3f415 Linus Torvalds 2005-04-16 3505
^1da177e4c3f415 Linus Torvalds 2005-04-16 3506 /*
^1da177e4c3f415 Linus Torvalds 2005-04-16 3507 * check is the application conforms to NIT.
^1da177e4c3f415 Linus Torvalds 2005-04-16 3508 */
^1da177e4c3f415 Linus Torvalds 2005-04-16 3509 if( copy_from_user(signature, arg, 7) )
^1da177e4c3f415 Linus Torvalds 2005-04-16 3510 return -EFAULT;
^1da177e4c3f415 Linus Torvalds 2005-04-16 3511
^1da177e4c3f415 Linus Torvalds 2005-04-16 3512 if( memcmp(signature, "MEGANIT", 7) == 0 ) {
^1da177e4c3f415 Linus Torvalds 2005-04-16 3513
^1da177e4c3f415 Linus Torvalds 2005-04-16 3514 uiocp = arg;
^1da177e4c3f415 Linus Torvalds 2005-04-16 3515
^1da177e4c3f415 Linus Torvalds 2005-04-16 3516 if( put_user(mc->status, (u8 __user *)&MBOX_P(uiocp)->status) )
^1da177e4c3f415 Linus Torvalds 2005-04-16 3517 return (-EFAULT);
^1da177e4c3f415 Linus Torvalds 2005-04-16 3518
^1da177e4c3f415 Linus Torvalds 2005-04-16 3519 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
^1da177e4c3f415 Linus Torvalds 2005-04-16 3520
^1da177e4c3f415 Linus Torvalds 2005-04-16 3521 umc = MBOX_P(uiocp);
^1da177e4c3f415 Linus Torvalds 2005-04-16 3522
^1da177e4c3f415 Linus Torvalds 2005-04-16 @3523 if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
^1da177e4c3f415 Linus Torvalds 2005-04-16 3524 return -EFAULT;
^1da177e4c3f415 Linus Torvalds 2005-04-16 3525
^1da177e4c3f415 Linus Torvalds 2005-04-16 3526 if( put_user(mc->status, (u8 __user *)&upthru->scsistatus))
^1da177e4c3f415 Linus Torvalds 2005-04-16 3527 return (-EFAULT);
^1da177e4c3f415 Linus Torvalds 2005-04-16 3528 }
^1da177e4c3f415 Linus Torvalds 2005-04-16 3529 }
^1da177e4c3f415 Linus Torvalds 2005-04-16 3530 else {
^1da177e4c3f415 Linus Torvalds 2005-04-16 3531 uioc_mimd = arg;
^1da177e4c3f415 Linus Torvalds 2005-04-16 3532
^1da177e4c3f415 Linus Torvalds 2005-04-16 3533 if( put_user(mc->status, (u8 __user *)&uioc_mimd->mbox[17]) )
^1da177e4c3f415 Linus Torvalds 2005-04-16 3534 return (-EFAULT);
^1da177e4c3f415 Linus Torvalds 2005-04-16 3535
^1da177e4c3f415 Linus Torvalds 2005-04-16 3536 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
^1da177e4c3f415 Linus Torvalds 2005-04-16 3537
^1da177e4c3f415 Linus Torvalds 2005-04-16 3538 umc = (megacmd_t __user *)uioc_mimd->mbox;
^1da177e4c3f415 Linus Torvalds 2005-04-16 3539
^1da177e4c3f415 Linus Torvalds 2005-04-16 3540 if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
^1da177e4c3f415 Linus Torvalds 2005-04-16 3541 return (-EFAULT);
^1da177e4c3f415 Linus Torvalds 2005-04-16 3542
^1da177e4c3f415 Linus Torvalds 2005-04-16 3543 if( put_user(mc->status, (u8 __user *)&upthru->scsistatus) )
^1da177e4c3f415 Linus Torvalds 2005-04-16 3544 return (-EFAULT);
^1da177e4c3f415 Linus Torvalds 2005-04-16 3545 }
^1da177e4c3f415 Linus Torvalds 2005-04-16 3546 }
^1da177e4c3f415 Linus Torvalds 2005-04-16 3547
^1da177e4c3f415 Linus Torvalds 2005-04-16 3548 return 0;
^1da177e4c3f415 Linus Torvalds 2005-04-16 3549 }
^1da177e4c3f415 Linus Torvalds 2005-04-16 3550
:::::: The code at line 3523 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2
:::::: TO: Linus Torvalds <torvalds@ppc970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@ppc970.osdl.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
reply other threads:[~2026-09-23 3:11 UTC|newest]
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