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f2fs: sanity check segment count

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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 <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
This commit is contained in:
Jin Qian 2017-04-25 16:28:48 -07:00 • committed by Jaegeuk Kim
commit b9dd46188e
2 changed files with 13 additions and 0 deletions
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7
fs/f2fs/super.c
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@ -1494,6 +1494,13 @@ 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;