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| author | Jin Qian <jinqian@google.com> | 2017-04-26 02:28:48 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-05-14 15:08:30 +0300 |
| commit | 6442a7f5d793a5d778d1f0cc62840a3f20dc1d72 (patch) | |
| tree | 0c1f444a0bec670ac84e922ea1cb57f84e204d3d /fs | |
| parent | 853151191ef2b62fa02c4a9fdeb90a8baeb3d911 (diff) | |
| download | linux-6442a7f5d793a5d778d1f0cc62840a3f20dc1d72.tar.xz | |
f2fs: sanity check segment count
commit b9dd46188edc2f0d1f37328637860bb65a771124 upstream.
F2FS uses 4 bytes to represent block address. As a result, supported
size of disk is 16 TB and it equals to 16 * 1024 * 1024 / 2 segments.
Signed-off-by: Jin Qian <jinqian@google.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/f2fs/super.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 287fcbd0551e..119b68332cd5 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -1441,6 +1441,13 @@ static int sanity_check_raw_super(struct f2fs_sb_info *sbi, return 1; } + if (le32_to_cpu(raw_super->segment_count) > F2FS_MAX_SEGMENT) { + f2fs_msg(sb, KERN_INFO, + "Invalid segment count (%u)", + le32_to_cpu(raw_super->segment_count)); + return 1; + } + /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */ if (sanity_check_area_boundary(sbi, bh)) return 1; |