When using fiemap to obtain the block address of files
larger than 2GB ((2147483647+1) bytes), an integer
multiplication overflow error will occur.
This issue is caused by the following code:
start = atoi(argv[1]) * F2FS_BLKSIZE;
length = atoi(argv[2]) * F2FS_BLKSIZE;
Signed-off-by: zangyangyang1 <[email protected]>
---
tools/f2fs_io/f2fs_io.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c
index 5bc0baf..ad6b5f0 100644
--- a/tools/f2fs_io/f2fs_io.c
+++ b/tools/f2fs_io/f2fs_io.c
@@ -809,15 +809,15 @@ static void do_fiemap(int argc, char **argv, const struct
cmd_desc *cmd)
}
memset(fm, 0, sizeof(struct fiemap));
- start = atoi(argv[1]) * F2FS_BLKSIZE;
- length = atoi(argv[2]) * F2FS_BLKSIZE;
- fm->fm_start = start;
- fm->fm_length = length;
+ start = atoll(argv[1]);
+ length = atoll(argv[2]);
+ fm->fm_start = start * F2FS_BLKSIZE;
+ fm->fm_length = length * F2FS_BLKSIZE;
fd = xopen(argv[3], O_RDONLY | O_LARGEFILE, 0);
printf("Fiemap: offset = %"PRIu64" len = %"PRIu64"\n",
- start / F2FS_BLKSIZE, length / F2FS_BLKSIZE);
+ start, length);
if (ioctl(fd, FS_IOC_FIEMAP, fm) < 0)
die_errno("FIEMAP failed");
--
2.40.1
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