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authorChristoph Hellwig <hch@lst.de>2021-10-18 13:11:23 +0300
committerJens Axboe <axboe@kernel.dk>2021-10-18 23:43:23 +0300
commitbe9a7b3e15916fd3710bfd383e8ecffc0416e919 (patch)
treee28d1d28f1cbdbfd6c71bab466ec13af5673f434 /fs/squashfs
parent1d5dd3b9164c77816a679d39dbd28787d3f22a3a (diff)
downloadlinux-be9a7b3e15916fd3710bfd383e8ecffc0416e919.tar.xz
squashfs: use bdev_nr_bytes instead of open coding it
Use the proper helper to read the block device size. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Phillip Lougher <phillip@squashfs.org.uk> Link: https://lore.kernel.org/r/20211018101130.1838532-24-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/squashfs')
-rw-r--r--fs/squashfs/super.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
index 60d6951915f4..bb44ff4c5cc6 100644
--- a/fs/squashfs/super.c
+++ b/fs/squashfs/super.c
@@ -16,6 +16,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#include <linux/blkdev.h>
#include <linux/fs.h>
#include <linux/fs_context.h>
#include <linux/fs_parser.h>
@@ -179,8 +180,8 @@ static int squashfs_fill_super(struct super_block *sb, struct fs_context *fc)
/* Check the filesystem does not extend beyond the end of the
block device */
msblk->bytes_used = le64_to_cpu(sblk->bytes_used);
- if (msblk->bytes_used < 0 || msblk->bytes_used >
- i_size_read(sb->s_bdev->bd_inode))
+ if (msblk->bytes_used < 0 ||
+ msblk->bytes_used > bdev_nr_bytes(sb->s_bdev))
goto failed_mount;
/* Check block size for sanity */