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Date: Tue, 29 May 2018 19:33:57 -0700 From: Jaegeuk Kim <jaegeuk@...nel.org> To: Chao Yu <yuchao0@...wei.com> Cc: Yunlong Song <yunlong.song@...wei.com>, chao@...nel.org, yunlong.song@...oud.com, miaoxie@...wei.com, bintian.wang@...wei.com, shengyong1@...wei.com, heyunlei@...wei.com, linux-f2fs-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org Subject: Re: [PATCH] f2fs-tools: fix overflow bug of start_sector when computing zone_align_start_offset On 05/28, Chao Yu wrote: > On 2018/5/26 16:09, Yunlong Song wrote: > > zone_align_start_offset should be u64, but config.start_sector is u32, > > so it may be overflow when computing zone_align_start_offset. > > Could you rebase this patch on top of "f2fs-tools: fix to match with the > start_sector"? Yes, please. I updated dev-test. :P > > Thanks, > > > > > Signed-off-by: Yunlong Song <yunlong.song@...wei.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", > >
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