diff options
| -rw-r--r-- | fs/ext4/mballoc.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 8779893d74e5..5a1052627a81 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -2295,9 +2295,12 @@ static int ext4_mb_seq_groups_show(struct seq_file *seq, void *v) int err, buddy_loaded = 0; struct ext4_buddy e4b; struct ext4_group_info *grinfo; + unsigned char blocksize_bits = min_t(unsigned char, + sb->s_blocksize_bits, + EXT4_MAX_BLOCK_LOG_SIZE); struct sg { struct ext4_group_info info; - ext4_grpblk_t counters[EXT4_MAX_BLOCK_LOG_SIZE + 2]; + ext4_grpblk_t counters[blocksize_bits + 2]; } sg; group--; @@ -2306,8 +2309,6 @@ static int ext4_mb_seq_groups_show(struct seq_file *seq, void *v) " 2^0 2^1 2^2 2^3 2^4 2^5 2^6 " " 2^7 2^8 2^9 2^10 2^11 2^12 2^13 ]\n"); - i = (sb->s_blocksize_bits + 2) * sizeof(sg.info.bb_counters[0]) + - sizeof(struct ext4_group_info); grinfo = ext4_get_group_info(sb, group); /* Load the group info in memory only if not already loaded. */ if (unlikely(EXT4_MB_GRP_NEED_INIT(grinfo))) { @@ -2319,7 +2320,7 @@ static int ext4_mb_seq_groups_show(struct seq_file *seq, void *v) buddy_loaded = 1; } - memcpy(&sg, ext4_get_group_info(sb, group), i); + memcpy(&sg, ext4_get_group_info(sb, group), sizeof(sg)); if (buddy_loaded) ext4_mb_unload_buddy(&e4b); @@ -2327,7 +2328,7 @@ static int ext4_mb_seq_groups_show(struct seq_file *seq, void *v) seq_printf(seq, "#%-5u: %-5u %-5u %-5u [", group, sg.info.bb_free, sg.info.bb_fragments, sg.info.bb_first_free); for (i = 0; i <= 13; i++) - seq_printf(seq, " %-5u", i <= sb->s_blocksize_bits + 1 ? + seq_printf(seq, " %-5u", i <= blocksize_bits + 1 ? sg.info.bb_counters[i] : 0); seq_printf(seq, " ]\n"); |