Commit b9dd4618 authored by Jin Qian's avatar Jin Qian Committed by Jaegeuk Kim

f2fs: sanity check segment count

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: default avatarJin Qian <jinqian@google.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent a817737e
...@@ -1494,6 +1494,13 @@ static int sanity_check_raw_super(struct f2fs_sb_info *sbi, ...@@ -1494,6 +1494,13 @@ static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
return 1; 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 */ /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
if (sanity_check_area_boundary(sbi, bh)) if (sanity_check_area_boundary(sbi, bh))
return 1; return 1;
......
...@@ -301,6 +301,12 @@ struct f2fs_nat_block { ...@@ -301,6 +301,12 @@ struct f2fs_nat_block {
#define SIT_VBLOCK_MAP_SIZE 64 #define SIT_VBLOCK_MAP_SIZE 64
#define SIT_ENTRY_PER_BLOCK (PAGE_SIZE / sizeof(struct f2fs_sit_entry)) #define SIT_ENTRY_PER_BLOCK (PAGE_SIZE / sizeof(struct f2fs_sit_entry))
/*
* 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.
*/
#define F2FS_MAX_SEGMENT ((16 * 1024 * 1024) / 2)
/* /*
* Note that f2fs_sit_entry->vblocks has the following bit-field information. * Note that f2fs_sit_entry->vblocks has the following bit-field information.
* [15:10] : allocation type such as CURSEG_XXXX_TYPE * [15:10] : allocation type such as CURSEG_XXXX_TYPE
......
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