f2fs: avoid value overflow in showing current status

This patch fixes overflow when do cat /sys/kernel/debug/f2fs/status.
If a section is relatively large, dist value can be overflowed.

Reported-by: Yossi Goldfill <ygoldfill@radianmemory.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index f50acbc..efbc83f 100644 (file)
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -94,7 +94,8 @@ static void update_general_status(struct f2fs_sb_info *sbi)
 static void update_sit_info(struct f2fs_sb_info *sbi)
 {
        struct f2fs_stat_info *si = F2FS_STAT(sbi);
-       unsigned int blks_per_sec, hblks_per_sec, total_vblocks, bimodal, dist;
+       unsigned long long blks_per_sec, hblks_per_sec, total_vblocks;
+       unsigned long long bimodal, dist;
        unsigned int segno, vblocks;
        int ndirty = 0;