From: Dan Carpenter <dan.carpenter@oracle.com>
To: kbuild@lists.01.org,
Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@xilinx.com>
Cc: lkp@intel.com, kbuild-all@lists.01.org,
linux-arm-kernel@lists.infradead.org,
Michal Simek <monstr@monstr.eu>
Subject: [xlnx:xlnx_rebase_v5.10 1377/1762] drivers/mtd/spi-nor/core.c:2246 spi_nor_read_id() error: we previously assumed 'nor->spimem' could be null (see line 2228)
Date: Tue, 31 Aug 2021 11:53:11 +0300 [thread overview]
Message-ID: <202108311024.yIMfmnhL-lkp@intel.com> (raw)
tree: https://github.com/Xilinx/linux-xlnx xlnx_rebase_v5.10
head: 09a4215f61493584f4410cab3477003e4046dab9
commit: d50528bd5db19df218fd9bd1e226a5644b769007 [1377/1762] spi: spi-cadence-quadspi: Added support for DDR PHY mode
config: arm-randconfig-m031-20210830 (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
New smatch warnings:
drivers/mtd/spi-nor/core.c:2246 spi_nor_read_id() error: we previously assumed 'nor->spimem' could be null (see line 2228)
Old smatch warnings:
drivers/mtd/spi-nor/core.c:1072 write_ear() error: uninitialized symbol 'code'.
drivers/mtd/spi-nor/core.c:1474 spi_nor_init_erase_cmd_list() warn: passing a valid pointer to 'PTR_ERR'
drivers/mtd/spi-nor/core.c:1487 spi_nor_init_erase_cmd_list() warn: passing a valid pointer to 'PTR_ERR'
vim +2246 drivers/mtd/spi-nor/core.c
06bb6f5a69dfc5 drivers/mtd/spi-nor/spi-nor.c Rafał Miłecki 2015-08-10 2221 static const struct flash_info *spi_nor_read_id(struct spi_nor *nor)
b199489d37b21c drivers/mtd/spi-nor/spi-nor.c Huang Shijie 2014-02-24 2222 {
9ec4bbcb2044ea drivers/mtd/spi-nor/core.c Boris Brezillon 2020-03-13 2223 const struct flash_info *info;
f173f26a4d543f drivers/mtd/spi-nor/spi-nor.c Vignesh Raghavendra 2019-08-06 2224 u8 *id = nor->bouncebuf;
2dcbfe365b1303 drivers/mtd/spi-nor/spi-nor.c Jonathan Neuschäfer 2020-02-23 2225 unsigned int i;
2dcbfe365b1303 drivers/mtd/spi-nor/spi-nor.c Jonathan Neuschäfer 2020-02-23 2226 int ret;
b199489d37b21c drivers/mtd/spi-nor/spi-nor.c Huang Shijie 2014-02-24 2227
b35b9a10362d20 drivers/mtd/spi-nor/spi-nor.c Boris Brezillon 2019-08-06 @2228 if (nor->spimem) {
^^^^^^^^^^^
Check for NULL
b35b9a10362d20 drivers/mtd/spi-nor/spi-nor.c Boris Brezillon 2019-08-06 2229 struct spi_mem_op op =
b35b9a10362d20 drivers/mtd/spi-nor/spi-nor.c Boris Brezillon 2019-08-06 2230 SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_RDID, 1),
b35b9a10362d20 drivers/mtd/spi-nor/spi-nor.c Boris Brezillon 2019-08-06 2231 SPI_MEM_OP_NO_ADDR,
b35b9a10362d20 drivers/mtd/spi-nor/spi-nor.c Boris Brezillon 2019-08-06 2232 SPI_MEM_OP_NO_DUMMY,
b35b9a10362d20 drivers/mtd/spi-nor/spi-nor.c Boris Brezillon 2019-08-06 2233 SPI_MEM_OP_DATA_IN(SPI_NOR_MAX_ID_LEN, id, 1));
b35b9a10362d20 drivers/mtd/spi-nor/spi-nor.c Boris Brezillon 2019-08-06 2234
2dcbfe365b1303 drivers/mtd/spi-nor/spi-nor.c Jonathan Neuschäfer 2020-02-23 2235 ret = spi_mem_exec_op(nor->spimem, &op);
b35b9a10362d20 drivers/mtd/spi-nor/spi-nor.c Boris Brezillon 2019-08-06 2236 } else {
2dcbfe365b1303 drivers/mtd/spi-nor/spi-nor.c Jonathan Neuschäfer 2020-02-23 2237 ret = nor->controller_ops->read_reg(nor, SPINOR_OP_RDID, id,
b35b9a10362d20 drivers/mtd/spi-nor/spi-nor.c Boris Brezillon 2019-08-06 2238 SPI_NOR_MAX_ID_LEN);
b35b9a10362d20 drivers/mtd/spi-nor/spi-nor.c Boris Brezillon 2019-08-06 2239 }
2dcbfe365b1303 drivers/mtd/spi-nor/spi-nor.c Jonathan Neuschäfer 2020-02-23 2240 if (ret) {
2dcbfe365b1303 drivers/mtd/spi-nor/spi-nor.c Jonathan Neuschäfer 2020-02-23 2241 dev_dbg(nor->dev, "error %d reading JEDEC ID\n", ret);
2dcbfe365b1303 drivers/mtd/spi-nor/spi-nor.c Jonathan Neuschäfer 2020-02-23 2242 return ERR_PTR(ret);
b199489d37b21c drivers/mtd/spi-nor/spi-nor.c Huang Shijie 2014-02-24 2243 }
b199489d37b21c drivers/mtd/spi-nor/spi-nor.c Huang Shijie 2014-02-24 2244
d50528bd5db19d drivers/mtd/spi-nor/core.c Sai Krishna Potthuri 2021-02-02 2245 for (i = 0; i < SPI_NOR_MAX_ID_LEN; i++)
d50528bd5db19d drivers/mtd/spi-nor/core.c Sai Krishna Potthuri 2021-02-02 @2246 nor->spimem->device_id[i] = id[i];
^^^^^^^^^^^
Unchecked dereference.
d50528bd5db19d drivers/mtd/spi-nor/core.c Sai Krishna Potthuri 2021-02-02 2247
9ec4bbcb2044ea drivers/mtd/spi-nor/core.c Boris Brezillon 2020-03-13 2248 for (i = 0; i < ARRAY_SIZE(manufacturers); i++) {
9ec4bbcb2044ea drivers/mtd/spi-nor/core.c Boris Brezillon 2020-03-13 2249 info = spi_nor_search_part_by_id(manufacturers[i]->parts,
9ec4bbcb2044ea drivers/mtd/spi-nor/core.c Boris Brezillon 2020-03-13 2250 manufacturers[i]->nparts,
9ec4bbcb2044ea drivers/mtd/spi-nor/core.c Boris Brezillon 2020-03-13 2251 id);
9ec4bbcb2044ea drivers/mtd/spi-nor/core.c Boris Brezillon 2020-03-13 2252 if (info) {
9ec4bbcb2044ea drivers/mtd/spi-nor/core.c Boris Brezillon 2020-03-13 2253 nor->manufacturer = manufacturers[i];
9ec4bbcb2044ea drivers/mtd/spi-nor/core.c Boris Brezillon 2020-03-13 2254 return info;
b199489d37b21c drivers/mtd/spi-nor/spi-nor.c Huang Shijie 2014-02-24 2255 }
9ec4bbcb2044ea drivers/mtd/spi-nor/core.c Boris Brezillon 2020-03-13 2256 }
9ec4bbcb2044ea drivers/mtd/spi-nor/core.c Boris Brezillon 2020-03-13 2257
3ddc8adbbc7683 drivers/mtd/spi-nor/spi-nor.c Geert Uytterhoeven 2019-03-12 2258 dev_err(nor->dev, "unrecognized JEDEC id bytes: %*ph\n",
3ddc8adbbc7683 drivers/mtd/spi-nor/spi-nor.c Geert Uytterhoeven 2019-03-12 2259 SPI_NOR_MAX_ID_LEN, id);
b199489d37b21c drivers/mtd/spi-nor/spi-nor.c Huang Shijie 2014-02-24 2260 return ERR_PTR(-ENODEV);
b199489d37b21c drivers/mtd/spi-nor/spi-nor.c Huang Shijie 2014-02-24 2261 }
---
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