VisionFive2 Linux kernel

StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)

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author: Fabian Frederick <fabf@skynet.be> 2014-10-13 15:54:01 -0700 committer: Linus Torvalds <torvalds@linux-foundation.org> 2014-10-14 02:18:22 +0200 commit: 76e512108935ecdb46792208dae5f59c7ea78e25 parent: 5ef9819234e285abe6b616864e7b1b4607d39b58
Commit Summary:
FS/OMFS: block number sanity check during fill_super operation
Diffstat:
1 file changed, 7 insertions, 3 deletions
diff --git a/fs/omfs/inode.c b/fs/omfs/inode.c
index ba8819702c56..138321b0c6c2 100644
--- a/fs/omfs/inode.c
+++ b/fs/omfs/inode.c
@@ -306,9 +306,7 @@ static const struct super_operations omfs_sops = {
  */
 static int omfs_get_imap(struct super_block *sb)
 {
-	int bitmap_size;
-	int array_size;
-	int count;
+	unsigned int bitmap_size, count, array_size;
 	struct omfs_sb_info *sbi = OMFS_SB(sb);
 	struct buffer_head *bh;
 	unsigned long **ptr;
@@ -473,6 +471,12 @@ static int omfs_fill_super(struct super_block *sb, void *data, int silent)
 	sbi->s_sys_blocksize = be32_to_cpu(omfs_sb->s_sys_blocksize);
 	mutex_init(&sbi->s_bitmap_lock);
 
+	if (sbi->s_num_blocks > OMFS_MAX_BLOCKS) {
+		printk(KERN_ERR "omfs: sysblock number (%llx) is out of range\n",
+		       (unsigned long long)sbi->s_num_blocks);
+		goto out_brelse_bh;
+	}
+
 	if (sbi->s_sys_blocksize > PAGE_SIZE) {
 		printk(KERN_ERR "omfs: sysblock size (%d) is out of range\n",
 			sbi->s_sys_blocksize);