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path: root/fs/ext2/super.c
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-rw-r--r--fs/ext2/super.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 03f2af98b1b4..3feea4b31fa7 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -945,6 +945,13 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
goto failed_mount;
}
+ if (le32_to_cpu(es->s_log_block_size) >
+ (EXT2_MAX_BLOCK_LOG_SIZE - BLOCK_SIZE_BITS)) {
+ ext2_msg(sb, KERN_ERR,
+ "Invalid log block size: %u",
+ le32_to_cpu(es->s_log_block_size));
+ goto failed_mount;
+ }
blocksize = BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size);
if (test_opt(sb, DAX)) {