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authorEric Biggers <ebiggers@google.com>2020-08-11 18:35:36 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-08-12 10:58:00 -0700
commit0a12c4a8069607247cb8edc3b035a664e636fd9a (patch)
tree2365518caad9ba14fd5fdc509a555514b22d8945 /fs/minix/itree_v1.c
parent32ac86efff91a3e4ef8c3d1cadd4559e23c8e73a (diff)
fs/minix: fix block limit check for V1 filesystems
The minix filesystem reads its maximum file size from its on-disk superblock. This value isn't necessarily a multiple of the block size. When it's not, the V1 block mapping code doesn't allow mapping the last possible block. Commit 6ed6a722f9ab ("minixfs: fix block limit check") fixed this in the V2 mapping code. Fix it in the V1 mapping code too. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Qiujun Huang <anenbupt@gmail.com> Link: http://lkml.kernel.org/r/20200628060846.682158-6-ebiggers@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/minix/itree_v1.c')
-rw-r--r--fs/minix/itree_v1.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/minix/itree_v1.c b/fs/minix/itree_v1.c
index c0d418209ead..405573a79aab 100644
--- a/fs/minix/itree_v1.c
+++ b/fs/minix/itree_v1.c
@@ -29,7 +29,7 @@ static int block_to_path(struct inode * inode, long block, int offsets[DEPTH])
if (block < 0) {
printk("MINIX-fs: block_to_path: block %ld < 0 on dev %pg\n",
block, inode->i_sb->s_bdev);
- } else if (block >= inode->i_sb->s_maxbytes/BLOCK_SIZE) {
+ } else if ((u64)block * BLOCK_SIZE >= inode->i_sb->s_maxbytes) {
if (printk_ratelimit())
printk("MINIX-fs: block_to_path: "
"block %ld too big on dev %pg\n",