[PATCH 3/4] ufs: ensure fast symlinks are NUL-terminated

From: Duane Griffin
Date: Wed Dec 31 2008 - 11:50:57 EST


Ensure fast symlink targets are NUL-terminated, even if corrupted
on-disk.

Signed-off-by: Duane Griffin <duaneg@xxxxxxxxx>
---
fs/ufs/inode.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c
index c1ea916..c2edfb6 100644
--- a/fs/ufs/inode.c
+++ b/fs/ufs/inode.c
@@ -658,8 +658,9 @@ static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
ufsi->i_u1.i_data[i] = ufs_inode->ui_u2.ui_addr.ui_db[i];
} else {
- for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
+ for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4 - 1; i++)
ufsi->i_u1.i_symlink[i] = ufs_inode->ui_u2.ui_symlink[i];
+ ufsi->i_u1.i_symlink[(UFS_NDADDR + UFS_NINDIR) * 4 - 1] = 0;
}
return 0;
}
@@ -708,8 +709,9 @@ static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
ufsi->i_u1.u2_i_data[i] =
ufs2_inode->ui_u2.ui_addr.ui_db[i];
} else {
- for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4 * 2; i++)
+ for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4 * 2 - 1; i++)
ufsi->i_u1.i_symlink[i] = ufs2_inode->ui_u2.ui_symlink[i];
+ ufsi->i_u1.i_symlink[(UFS_NDADDR + UFS_NINDIR) * 4 * 2 - 1] = 0;
}
return 0;
}
--
1.6.0.6

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/