Messages in this thread Patch in this message | | | From | Yunlong Song <> | Subject | [PATCH] f2fs-tools: fix overflow bug of start_sector when computing zone_align_start_offset | Date | Sat, 26 May 2018 16:09:49 +0800 |
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zone_align_start_offset should be u64, but config.start_sector is u32, so it may be overflow when computing zone_align_start_offset.
Signed-off-by: Yunlong Song <yunlong.song@huawei.com> --- fsck/resize.c | 7 ++++--- mkfs/f2fs_format.c | 4 ++-- 2 files changed, 6 insertions(+), 5 deletions(-)
diff --git a/fsck/resize.c b/fsck/resize.c index d285dd7..8ac7d45 100644 --- a/fsck/resize.c +++ b/fsck/resize.c @@ -11,7 +11,8 @@ static int get_new_sb(struct f2fs_super_block *sb) { - u_int32_t zone_size_bytes, zone_align_start_offset; + u_int32_t zone_size_bytes; + u_int64_t zone_align_start_offset; u_int32_t blocks_for_sit, blocks_for_nat, blocks_for_ssa; u_int32_t sit_segments, nat_segments, diff, total_meta_segments; u_int32_t total_valid_blks_available; @@ -27,10 +28,10 @@ static int get_new_sb(struct f2fs_super_block *sb) zone_size_bytes = segment_size_bytes * segs_per_zone; zone_align_start_offset = - (c.start_sector * c.sector_size + + ((u_int64_t) c.start_sector * c.sector_size + 2 * F2FS_BLKSIZE + zone_size_bytes - 1) / zone_size_bytes * zone_size_bytes - - c.start_sector * c.sector_size; + (u_int64_t) c.start_sector * c.sector_size; set_sb(segment_count, (c.target_sectors * c.sector_size - zone_align_start_offset) / segment_size_bytes / diff --git a/mkfs/f2fs_format.c b/mkfs/f2fs_format.c index 0a99a77..f045e23 100644 --- a/mkfs/f2fs_format.c +++ b/mkfs/f2fs_format.c @@ -212,10 +212,10 @@ static int f2fs_prepare_super_block(void) set_sb(block_count, c.total_sectors >> log_sectors_per_block); zone_align_start_offset = - (c.start_sector * c.sector_size + + ((u_int64_t) c.start_sector * c.sector_size + 2 * F2FS_BLKSIZE + zone_size_bytes - 1) / zone_size_bytes * zone_size_bytes - - c.start_sector * c.sector_size; + (u_int64_t) c.start_sector * c.sector_size; if (c.start_sector % c.sectors_per_blk) { MSG(1, "\t%s: Align start sector number to the page unit\n", -- 1.8.5.2
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