hostfs: fix UML crash: remove f_spare from hostfs

365b1818 ("add f_flags to struct statfs(64)") resized f_spare within
struct statfs which caused a UML crash.  There is no need to copy f_spare.

Signed-off-by: Richard Weinberger <richard@nod.at>
Reported-by: Toralf Förster <toralf.foerster@gmx.de>
Tested-by: Toralf Förster <toralf.foerster@gmx.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/hostfs/hostfs.h b/fs/hostfs/hostfs.h
index 7c232c1..bf15a43 100644 (file)
--- a/fs/hostfs/hostfs.h
+++ b/fs/hostfs/hostfs.h
@@ -91,7 +91,6 @@ extern int rename_file(char *from, char *to);
 extern int do_statfs(char *root, long *bsize_out, long long *blocks_out,
                     long long *bfree_out, long long *bavail_out,
                     long long *files_out, long long *ffree_out,
-                    void *fsid_out, int fsid_size, long *namelen_out,
-                    long *spare_out);
+                    void *fsid_out, int fsid_size, long *namelen_out);
 
 #endif

diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index f7dc9b5..cd7c939 100644 (file)
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -217,7 +217,7 @@ int hostfs_statfs(struct dentry *dentry, struct kstatfs *sf)
        err = do_statfs(dentry->d_sb->s_fs_info,
                        &sf->f_bsize, &f_blocks, &f_bfree, &f_bavail, &f_files,
                        &f_ffree, &sf->f_fsid, sizeof(sf->f_fsid),
-                       &sf->f_namelen, sf->f_spare);
+                       &sf->f_namelen);
        if (err)
                return err;
        sf->f_blocks = f_blocks;

diff --git a/fs/hostfs/hostfs_user.c b/fs/hostfs/hostfs_user.c
index 6777aa0..8d02683 100644 (file)
--- a/fs/hostfs/hostfs_user.c
+++ b/fs/hostfs/hostfs_user.c
@@ -364,8 +364,7 @@ int rename_file(char *from, char *to)
 int do_statfs(char *root, long *bsize_out, long long *blocks_out,
              long long *bfree_out, long long *bavail_out,
              long long *files_out, long long *ffree_out,
-             void *fsid_out, int fsid_size, long *namelen_out,
-             long *spare_out)
+             void *fsid_out, int fsid_size, long *namelen_out)
 {
        struct statfs64 buf;
        int err;
@@ -384,10 +383,6 @@ int do_statfs(char *root, long *bsize_out, long long *blocks_out,
               sizeof(buf.f_fsid) > fsid_size ? fsid_size :
               sizeof(buf.f_fsid));
        *namelen_out = buf.f_namelen;
-       spare_out[0] = buf.f_spare[0];
-       spare_out[1] = buf.f_spare[1];
-       spare_out[2] = buf.f_spare[2];
-       spare_out[3] = buf.f_spare[3];
-       spare_out[4] = buf.f_spare[4];
+
        return 0;
 }