[PATCH]: reiserfs: D-clear-i_blocks.patch

[Nikita Danilov]

Hello, Linus,

This patch sets inode.i_blocks to zero on deletion of reiserfs
file. This in particular cures hard to believe bug when saving file in
EMACS caused top to loose sight of all processes:
 . reiserfs didn't properly cleared i_blocks when removing
   symlinks. Actually -7 was inserted into unsigned i_blocks field. This
   didn't usually hurt because file is being deleted;
 . inode is reused for procfs and neither get_new_inode() nor
   proc_read_inode() cleared i_blocks;
 . now procfs inode has huge i_blocks field;
 . top calls stat on it and libc wrapper returns EOVERFLOW, as i_blocks
   doesn't fit into user-level struct.
 . top sees nothing.
  
[lkml: please CC me, I am not subscribed.]

Nikita.
diff -rup linux-2.4.8-pre3/fs/reiserfs/inode.c linux-2.4.8-pre3.patched/fs/reiserfs/inode.c
--- linux-2.4.8-pre3/fs/reiserfs/inode.c	Wed Aug  1 17:21:10 2001
+++ linux-2.4.8-pre3.patched/fs/reiserfs/inode.c	Wed Aug  1 21:33:37 2001
@@ -55,6 +55,7 @@ void reiserfs_delete_inode (struct inode
 	;
     }
     clear_inode (inode); /* note this must go after the journal_end to prevent deadlock */
+    inode->i_blocks = 0;
     unlock_kernel() ;
 }