part 2 of the patch set: a one-liner that strengthens the superblock
sanity checking.
From: Tigran Aivazian <aivazian.tigran@xxxxxxxxx>
Subject: [PATCH 4.19.6 2/2] BFS updates
Strengthen the superblock sanity checking (supersedes the code
that went into 4.19.6).
Signed-off-by: Tigran Aivazian <aivazian.tigran@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
inode.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- fs/bfs/inode.c.0 2018-12-02 20:49:00.525461354 +0000
+++ fs/bfs/inode.c 2018-12-02 20:49:51.054686779 +0000
@@ -350,7 +350,7 @@
s->s_magic = BFS_MAGIC;
if (le32_to_cpu(bfs_sb->s_start) > le32_to_cpu(bfs_sb->s_end) ||
- le32_to_cpu(bfs_sb->s_start) < BFS_BSIZE) {
+ le32_to_cpu(bfs_sb->s_start) < sizeof(struct bfs_super_block) + sizeof(struct bfs_dirent)) {
printf("Superblock is corrupted\n");
goto out1;
}
