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| author | Eric Biggers <ebiggers@google.com> | 2020-08-11 18:35:36 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-08-21 11:05:38 +0200 |
| commit | c7ac366be04e49147498f0837bca5c020c3fb994 (patch) | |
| tree | ba70723110c64594ad111460b94f3e244086a695 | |
| parent | 95fc841ea8b681eea44e766c182c18f17818acbf (diff) | |
| download | linux-stable-c7ac366be04e49147498f0837bca5c020c3fb994.tar.gz linux-stable-c7ac366be04e49147498f0837bca5c020c3fb994.tar.bz2 linux-stable-c7ac366be04e49147498f0837bca5c020c3fb994.zip | |
fs/minix: fix block limit check for V1 filesystems
[ Upstream commit 0a12c4a8069607247cb8edc3b035a664e636fd9a ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | fs/minix/itree_v1.c | 2 |
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", |