Upgrade to 4.4.50-rt62

[kvmfornfv.git] / kernel / fs / ext4 / balloc.c

diff --git a/kernel/fs/ext4/balloc.c b/kernel/fs/ext4/balloc.c
index fe1f50f..f971104 100644 (file)
--- a/kernel/fs/ext4/balloc.c
+++ b/kernel/fs/ext4/balloc.c
@@ -208,6 +208,9 @@ static int ext4_init_block_bitmap(struct super_block *sb,
        memset(bh->b_data, 0, sb->s_blocksize);
 
        bit_max = ext4_num_base_meta_clusters(sb, block_group);
+       if ((bit_max >> 3) >= bh->b_size)
+               return -EFSCORRUPTED;
+
        for (bit = 0; bit < bit_max; bit++)
                ext4_set_bit(bit, bh->b_data);