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Commit 3bc8414b authored by Suzuki's avatar Suzuki Committed by Linus Torvalds
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[PATCH] Fix do_path_lookup() to add the check for error in link_path_walk() 



Fix do_path_lookup() to avoid accessing invalid dentry or inode when the
link_path_walk() has failed.  This should fix Bugme #5897.

Signed-off-by: default avatarSuzuki K P <suzuki@in.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent c00a76ae

fs/namei.c

+4 −2
Original line number Diff line number Diff line
@@ -1119,9 +1119,11 @@ static int fastcall do_path_lookup(int dfd, const char *name, 
	current->total_link_count = 0;

	retval = link_path_walk(name, nd);

out:

	if (unlikely(current->audit_context

		     && nd && nd->dentry && nd->dentry->d_inode))

	if (likely(retval == 0)) {

		if (unlikely(current->audit_context && nd && nd->dentry &&

				nd->dentry->d_inode))

		audit_inode(name, nd->dentry->d_inode, flags);

	}

	return retval;



fput_unlock_fail: