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SubjectRe: [PATCH 01/14] ubi: fastmap: Read PEB numbers more carefully
Hi Richard,

I love your patch! Perhaps something to improve:

[auto build test WARNING on mtd/master]
[also build test WARNING on v4.17 next-20180613]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Richard-Weinberger/ubi-Fastmap-updates/20180614-052830
base: git://git.infradead.org/linux-mtd.git master
reproduce:
# apt-get install sparse
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

>> drivers/mtd/ubi/fastmap.c:110:14: sparse: incorrect type in assignment (different base types) @@ expected restricted __be32 [usertype] pnum @@ got [usertype] pnum @@
drivers/mtd/ubi/fastmap.c:110:14: expected restricted __be32 [usertype] pnum
drivers/mtd/ubi/fastmap.c:110:14: got unsigned int
>> drivers/mtd/ubi/fastmap.c:111:13: sparse: restricted __be32 degrades to integer
>> drivers/mtd/ubi/fastmap.c:112:27: sparse: incorrect type in assignment (different base types) @@ expected int [signed] <noident> @@ got restricted __be3int [signed] <noident> @@
drivers/mtd/ubi/fastmap.c:112:27: expected int [signed] <noident>
drivers/mtd/ubi/fastmap.c:112:27: got restricted __be32 [usertype] pnum
drivers/mtd/ubi/fastmap.c:116:13: sparse: restricted __be32 degrades to integer
drivers/mtd/ubi/fastmap.c:116:25: sparse: restricted __be32 degrades to integer
drivers/mtd/ubi/fastmap.c:121:27: sparse: incorrect type in assignment (different base types) @@ expected int [signed] <noident> @@ got restricted __be3int [signed] <noident> @@
drivers/mtd/ubi/fastmap.c:121:27: expected int [signed] <noident>
drivers/mtd/ubi/fastmap.c:121:27: got restricted __be32 [usertype] pnum
drivers/mtd/ubi/fastmap.c:604:23: sparse: incorrect type in assignment (different base types) @@ expected unsigned long long [unsigned] max_sqnum @@ got nsigned long long [unsigned] max_sqnum @@
drivers/mtd/ubi/fastmap.c:604:23: expected unsigned long long [unsigned] max_sqnum
drivers/mtd/ubi/fastmap.c:604:23: got restricted __be64 [usertype] sqnum
drivers/mtd/ubi/fastmap.c:1075:17: sparse: incorrect type in assignment (different base types) @@ expected restricted __be32 [usertype] tmp_crc @@ got [usertype] tmp_crc @@
drivers/mtd/ubi/fastmap.c:1075:17: expected restricted __be32 [usertype] tmp_crc
drivers/mtd/ubi/fastmap.c:1075:17: got unsigned int
drivers/mtd/ubi/fastmap.c:1077:13: sparse: incorrect type in assignment (different base types) @@ expected restricted __be32 [usertype] crc @@ got [usertype] crc @@
drivers/mtd/ubi/fastmap.c:1077:13: expected restricted __be32 [usertype] crc
drivers/mtd/ubi/fastmap.c:1077:13: got unsigned int
drivers/mtd/ubi/fastmap.c:1086:22: sparse: incorrect type in assignment (different base types) @@ expected restricted __be64 [usertype] sqnum @@ got unsigned lonrestricted __be64 [usertype] sqnum @@
drivers/mtd/ubi/fastmap.c:1086:22: expected restricted __be64 [usertype] sqnum
drivers/mtd/ubi/fastmap.c:1086:22: got unsigned long long [unsigned] [assigned] sqnum

vim +110 drivers/mtd/ubi/fastmap.c

103
104 static bool read_pnum(struct ubi_device *ubi, struct ubi_attach_info *ai,
105 __be32 pnum, int *out_pnum)
106 {
107 int ret = true;
108 int max_pnum = ubi->peb_count;
109
> 110 pnum = be32_to_cpu(pnum);
> 111 if (pnum == UBI_UNKNOWN) {
> 112 *out_pnum = pnum;
113 goto out;
114 }
115
116 if (pnum < 0 || pnum >= max_pnum) {
117 ubi_err(ubi, "fastmap references PEB out of range: %i", pnum);
118 ret = false;
119 goto out;
120 } else {
121 *out_pnum = pnum;
122 }
123
124 out:
125 return ret;
126 }
127

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation

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