Hi Jaegeuk,
> -----Original Message-----
> From: Jaegeuk Kim [mailto:jaeg...@kernel.org]
> Sent: Tuesday, March 22, 2016 2:56 AM
> To: linux-kernel@vger.kernel.org; linux-fsde...@vger.kernel.org;
> linux-f2fs-de...@lists.sourceforge.net
> Cc: Jaegeuk Kim; stable 4 . 5+
> Subject: [f2fs-dev] [PATCH 1/2] f2fs: cover large section in sanity check of
> super
>
> This patch fixes the bug which does not cover a large section case when
> checking
> the sanity of superblock.
>
> Reported-by: Matthias Prager <li...@matthiasprager.de>
> Reported-by: David Gnedt <david.gn...@davizone.at>
> Cc: stable 4.5+ <sta...@vger.kernel.org>
> Signed-off-by: Jaegeuk Kim <jaeg...@kernel.org>
> ---
> fs/f2fs/super.c | 19 +++++++++++++++++--
> 1 file changed, 17 insertions(+), 2 deletions(-)
>
> diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
> index 15bb81f..fc9147f 100644
> --- a/fs/f2fs/super.c
> +++ b/fs/f2fs/super.c
> @@ -1000,6 +1000,7 @@ static inline bool sanity_check_area_boundary(struct
> super_block *sb,
> u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
> u32 segment_count = le32_to_cpu(raw_super->segment_count);
> u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
> + u32 segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
>
> if (segment0_blkaddr != cp_blkaddr) {
> f2fs_msg(sb, KERN_INFO,
> @@ -1044,12 +1045,26 @@ static inline bool sanity_check_area_boundary(struct
> super_block *sb,
> return true;
> }
>
> - if (main_blkaddr + (segment_count_main << log_blocks_per_seg) !=
> + if (segs_per_sec == 1 &&
> + main_blkaddr + (segment_count_main << log_blocks_per_seg) !=
> segment0_blkaddr + (segment_count << log_blocks_per_seg)) {
> f2fs_msg(sb, KERN_INFO,
> "Wrong MAIN_AREA boundary, start(%u) end(%u)
> blocks(%u)",
> main_blkaddr,
> - segment0_blkaddr + (segment_count <<
> log_blocks_per_seg),
> + segment0_blkaddr +
> + (segment_count << log_blocks_per_seg),
> + segment_count_main << log_blocks_per_seg);
> + return true;
> + }
> +
> + if (segs_per_sec > 1 &&
if ((segs_per_sec > 1 || secs_per_zone > 1)) && ?
Thanks,
> + main_blkaddr + (segment_count_main << log_blocks_per_seg) >
> + segment0_blkaddr + (segment_count << log_blocks_per_seg)) {
> + f2fs_msg(sb, KERN_INFO,
> + "Wrong MAIN_AREA boundary in large section, start(%u)
> end(%u) blocks(%u)",
> + main_blkaddr,
> + segment0_blkaddr +
> + (segment_count << log_blocks_per_seg),
> segment_count_main << log_blocks_per_seg);
> return true;
> }
> --
> 2.6.3
>
>
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