diff options
| author | Brian Norris <computersforpeace@gmail.com> | 2014-07-21 19:07:12 -0700 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2014-08-19 11:53:08 -0700 |
| commit | 1001ff7a4f64f3f4264e69d3ed70ff428f627e01 (patch) | |
| tree | 9b673e00fda7873a9958cf5d60f66a49cf2e020c /drivers/mtd/tests/mtd_test.c | |
| parent | 8c3f3f1d7941bcb25590b784f84accd7dcb44ba3 (diff) | |
mtd: tests: fix integer overflow issues
These multiplications are done with 32-bit arithmetic, then converted to
64-bit. We should widen the integers first to prevent overflow. This
could be a problem for large (>4GB) MTD's.
Detected by Coverity.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Diffstat (limited to 'drivers/mtd/tests/mtd_test.c')
| -rw-r--r-- | drivers/mtd/tests/mtd_test.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/mtd/tests/mtd_test.c b/drivers/mtd/tests/mtd_test.c index 111ee46a7428..34736bbcc07b 100644 --- a/drivers/mtd/tests/mtd_test.c +++ b/drivers/mtd/tests/mtd_test.c @@ -10,7 +10,7 @@ int mtdtest_erase_eraseblock(struct mtd_info *mtd, unsigned int ebnum) { int err; struct erase_info ei; - loff_t addr = ebnum * mtd->erasesize; + loff_t addr = (loff_t)ebnum * mtd->erasesize; memset(&ei, 0, sizeof(struct erase_info)); ei.mtd = mtd; @@ -33,7 +33,7 @@ int mtdtest_erase_eraseblock(struct mtd_info *mtd, unsigned int ebnum) static int is_block_bad(struct mtd_info *mtd, unsigned int ebnum) { int ret; - loff_t addr = ebnum * mtd->erasesize; + loff_t addr = (loff_t)ebnum * mtd->erasesize; ret = mtd_block_isbad(mtd, addr); if (ret) |