Commit 4a3b0a49 authored by Jan Blunck's avatar Jan Blunck Committed by Linus Torvalds

[PATCH] igrab() should check for I_CLEAR

When igrab() is calling __iget() on an inode it should check if
clear_inode() has been called on the inode already.  Otherwise there is a
race window between clear_inode() and destroy_inode() where igrab() calls
__iget() which leads to already free inodes on the inode lists.
Signed-off-by: default avatarVandana Rungta <vandana@novell.com>
Signed-off-by: default avatarJan Blunck <jblunck@suse.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Neil Brown <neilb@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 068135e6
......@@ -709,7 +709,7 @@ EXPORT_SYMBOL(iunique);
struct inode *igrab(struct inode *inode)
{
spin_lock(&inode_lock);
if (!(inode->i_state & (I_FREEING|I_WILL_FREE)))
if (!(inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)))
__iget(inode);
else
/*
......
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