arch/powerpc/kexec/ima.c:156:21: sparse: sparse: incorrect type in assignment (different base types)

From: kbuild test robot
Date: Sat May 23 2020 - 17:59:27 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 423b8baf18a8c03f2d6fa99aa447ed0da189bb95
commit: 793b08e2efff3ec020c5c5861d00ed394fcdd488 powerpc/kexec: Move kexec files into a dedicated subdir.
date: 6 months ago
config: powerpc-randconfig-s001-20200524 (attached as .config)
compiler: powerpc64-linux-gcc (GCC) 9.3.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.1-193-gb8fad4bc-dirty
git checkout 793b08e2efff3ec020c5c5861d00ed394fcdd488
# save the attached .config to linux build tree
make W=1 C=1 ARCH=powerpc CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@xxxxxxxxx>


sparse warnings: (new ones prefixed by >>)

>> arch/powerpc/kexec/ima.c:156:21: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned int [usertype] tmp @@ got restrunsigned int [usertype] tmp @@
>> arch/powerpc/kexec/ima.c:156:21: sparse: expected unsigned int [usertype] tmp
>> arch/powerpc/kexec/ima.c:156:21: sparse: got restricted __be32 [usertype]
>> arch/powerpc/kexec/ima.c:161:21: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned long long [usertype] tmp @@ got nsigned long long [usertype] tmp @@
>> arch/powerpc/kexec/ima.c:161:21: sparse: expected unsigned long long [usertype] tmp
>> arch/powerpc/kexec/ima.c:161:21: sparse: got restricted __be64 [usertype]

vim +156 arch/powerpc/kexec/ima.c

ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 147
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 148 static int write_number(void *p, u64 value, int cells)
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 149 {
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 150 if (cells == 1) {
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 151 u32 tmp;
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 152
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 153 if (value > U32_MAX)
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 154 return -EINVAL;
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 155
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 @156 tmp = cpu_to_be32(value);
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 157 memcpy(p, &tmp, sizeof(tmp));
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 158 } else if (cells == 2) {
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 159 u64 tmp;
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 160
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 @161 tmp = cpu_to_be64(value);
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 162 memcpy(p, &tmp, sizeof(tmp));
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 163 } else
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 164 return -EINVAL;
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 165
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 166 return 0;
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 167 }
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 168

:::::: The code at line 156 was first introduced by commit
:::::: ab6b1d1fc4aae6b8bd6fb1422405568094c9b40f powerpc: ima: send the kexec buffer to the next kernel

:::::: TO: Thiago Jung Bauermann <bauerman@xxxxxxxxxxxxxxxxxx>
:::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>

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Attachment: .config.gz
Description: application/gzip